Htp Hp-30sc Installation manual

Evacuated Tube

Solar Collectors

Installation

Start-Up

Maintenance

Parts

Warranty

For Residential and Commercial Use

HP-30SC Models

This manual must only be used by a qualied installer / service technician. Read all instructions in this manual before installing.

Perform steps in the given order. Failure to do so could result in substantial property damage, severe personal injury, or death.

HTP reserves the right to make product changes or updates without notice and will not be held liable for typographical errors

in literature.

The surfaces of these products contacted by potable (consumable) water contain less than 0.25% lead by weight as required

by the Safe Drinking Water Act, Section 1417.

NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.

272 Duchaine Blvd. New Bedford, MA 02745 www.htproducts.com

lp-220 Rev. 000 Rel. 007 Date 2.12.18

The following dened terms are used throughout this manual to

bring attention to the presence of hazards of various risk levels or to

important product information.

DANGER indicates an imminently hazardous situation which, if not

avoided, will result in serious personal injury or death.

WARNING indicates a potentially hazardous situation which, if not

avoided, could result in personal injury or death.

CAUTION indicates a potentially hazardous situation which, if not

avoided, may result in moderate or minor personal injury.

CAUTION used without the safety alert symbol indicates a

potentially hazardous situation which, if not avoided, may result in

property damage.

NOTICE is used to address practices not related to personal injury.

Foreword

This manual is intended to be used in conjunction with other literature

provided with the Evacuated Tube Solar Collector. This includes all

related control information. It is important that this manual, all other

documents included with this system, and additional publications,

such as Solar Water Heating System Design and Installation Guidelines,

SRCC OG-300, be reviewed in their entirety before beginning any work.

Installation should be made in accordance with the regulations of

the Authority Having Jurisdiction, local code authorities, and utility

companies which pertain to this type of water heating equipment.

Authority Having Jurisdiction (AHJ) – The Authority Having Jurisdiction

may be a federal, state, local government, or individual such as a re

chief, re marshal, chief of a re prevention bureau, labor department

or health department, building ocial or electrical inspector, or others

having statutory authority. In some circumstances, the property owner

of his/her agent assumes the role, and at government installations, the

commanding ocer or departmental ocial may be the AHJ.

NOTE: HTP reserves the right to modify product technical specications

and components without prior notice.

For the Installer

INSTALLATION OR SERVICE OF THESE SOLAR PANELS IS REQUIREDTO BE

PERFORMED BY LICENSED PROFESSIONALS WHERE SOLAR, PLUMBING,

AND ELECTRICAL WORK IS REQUIRED.

The installer should be guided by the instructions furnished with

the tank, as well as local codes and utility company requirements.

Preference should be given to codes and requirements where they

dier from the furnished instructions.

Additional publications which should guide the installer include:

Solar Water Heating System Design and Installation Guidelines, SRCC OG-

300, available from Solar Rating & Certication Corporation, 400 High

Table of Contents

Introduction - About Your Solar Collector 3

Part 1 - General Safety Information 3

A. When Servicing the Solar Water Heating System 3

B. Metallic Components 3

C. Local Installation Regulations 3

D. Evacuated Tubes 4

E. High Temperatures 4

F. Safety Precautions 4

G. Water Temperature Adjustment 4

H. System Water 4

I. Freeze Protection 4

Part 2 - Important Information 4

A. Scope of this Manual 4

B. Local Standards and Authorized Persons 4

C. Terminology 5

D. Possible System Designs 5

1. Open Loop Systems 5

2. Closed Loop Systems 5

3. Drain Back Systems 5

E. Fluid Quality 5

F. Corrosion 5

G. Freeze Protection 5

H. Wind Stress 5

I. Snow Load 6

J. Storage Tanks 6

K. Hail Resistance 6

Part 3 - Installation Information 6

A. Transport, Unpacking, and Inspection 6

B. Collector Dimensions and Weights 7

C. Tools and Materials 7

D. System Design 7

E. Delta-T Controller Settings 8

F. Stagnation and Overheating 8

G. Sizing System to Avoid Overheating 8

H. Collector Angle, Plane, and Direction 8

1. Collector Direction 8

2. Collector Angle (Tilt) 8

3. Collector Plane (Horizontal or Vertical) 8

I. Avoid Shade 8

J. Location 8

K. Expansion Tank 8

1. Open Loop Systems 9

2. Closed Loop Systems 9

3. Drain Back Systems 9

L. Lightning Protection 9

M. Pipe Sizing and Connections 9

N. Connection of Multiple Collectors 9

O. Potable Water 9

P. Mounting Frame 9

Q. Galvanic Reaction 9

Part 4 - Collector Installation 9

Part 5 - Roof / Wall Mounting Suggestions 12

A. Roof Mounting 12

B. Flush Pitched Roof Installation 13

1. Tiled Roof Attachment 13

2. Corrugated Iron Roof Attachment 13

3. Asphalt Shingle Roof 13

For your safety, please read through this manual carefully before

installation to minimize the risk of re, property damage, personal

injury, or death. Ensure the solar hot water system is properly

installed in accordance with this manual before use.

Point Drive, Suite 400, Cocoa, FL 32926-6630, www.solar-rating.org.

Code for the Installation of Heat Producing Appliances (latest version),

available from the American Insurance Association, 85 John Street,

New York, NY 11038.

The latest version of the National Electrical Code, NFPA No. 70.

In Canada refer to Canadian Electrical Code C 22.1, from Canadian

Standards Association, 5060 Spectrum Way, Suite 100, Mississauga,

Ontario, Canada L4W 5N6.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

Part 1 - General Safety Information

This solar collector is not intended for open loop (direct heating) of

swimming pool applications.

Installer - Read all instructions in this manual before installing.

Perform steps in the given order.

User - This manual is for use only by a qualied heating installer /

service technician. Have this solar water heating system serviced /

inspected annually by a qualied service technician.

NOTE: If the solar water heating system is exposed to the following,

do not operate. Immediately call a qualied service technician.

1. Fire

2. Damage

3. Submersion in Water

Failure to adhere to these guidelines can result in substantial

property damage, severe personal injury, or death.

Only use this solar hot water system as intended and described

in this installation manual. Any use other than described will void

warranty and may lead to re, property damage, personal injury, or

death.

NOTE: Obey all local codes. Obtain all applicable permits before

installing the solar system.

NOTE: Install all solar system components and piping in such a

manner that does not reduce the performance of any re rated

assembly.

UNCRATING THE SOLAR COLLECTOR - Any claims for damage

or shortage in shipment must be led immediately against the

transportation company by the consignee.

Introduction - About Your Solar Collector

Your Evacuated Tube Solar Collector is designed to oer reliable hot

water heating in hot, mild, or cold climates. Evacuated tubes provide

insulation around heat pipes and operate in open loop, closed loop,

and drain back solar systems, making these collectors ideal for a

variety of installation designs, including in cold climates where at

panel collectors may not be an option.

Additionally, if an evacuated tube (or tubes) should break, there is

no need to shut down the system. The collector will continue to

function until the damaged tube(s) can be replaced.

NOTE: Solar system performance and eciency varies with factors

such as: household hot water load, ambient air temperature,

collector/roof pitch, collector orientation, and seasonal intensity.

Job site conditions will require your installation contractor to supply

some or all of the following:

• Plumbing connections

• Piping and insulation

• Valves between your backup water system and the solar

system

NOTE: Failure to follow the procedures and instructions in this

manual WILL VOID the warranty.

ALL PIPING AND PLUMBING CONNECTIONS SHOULD BE MADE

WITH COPPER PIPE ONLY. No less than ¾” I.D. copper tube of the

type meeting local codes must be used for piping. Pipe runs must be

solidly attached with proper clamping methods. Soldered connections

should be secured with 95/5 lead-free solder. Use only pipe rated for

250oF minimum on both the collector return and supply piping.

C. Low Pitched Roof Installation 13

D. Flat Roof Installation 13

E. Wall Mounting 13

Part 6 - Plumbing Connections 13

A. Temperature Sensor Insertion 14

B. Header Connection 14

C. Air Purge 14

1. Open Loop 14

2. Pressure Open Loop 14

3. Closed Loop 14

D. Plumbing Check 14

E. Glycol Freeze Protection 14

F. Insulation 14

G. Pump Selection 14

Part 7 - System Piping Applications 15

Part 8 - Maintenance 16

A. Cleaning 16

B. Leaves 16

C. Broken Tube 16

D. Insulation 16

E. Draining the Collector 16

F. Other Components 16

G. Stagnation 16

Part 9 - Troubleshooting 16

A. No Hot Water 16

B. Reduced Solar Contribution 16

C. Regular Water Dumping 17

Part 10 - Installation Checklist 17

Ten (10) Year Limited Warranty 18

Customer Installation Record Form 20

Before Installation - Store components in a safe, dry location. Do

not store outside on the ground where water or snow can collect

and cause damage. If components are going to be stored for

extended periods of time before installation, store them indoors or

outdoors high enough o the ground to avoid water damage. It is

recommended to wrap components with a water resistant cover.

NOTE: Damages to panels due to improper storage ARE NOT covered

by warranty.

B. Metallic Components

To avoid injury, always wear leather protective gloves when handling

solar collector components. All eorts have been made to make the

metal components safe to handle, but there may still be some sharp

edges.

A. When Servicing the Solar Water Heating System

To avoid electric shock, disconnect electrical supply before performing

maintenance.

To avoid severe burns, allow solar collector and associated equipment

to cool before servicing.

C. Local Installation Regulations

Installation of this solar water heating system may be governed

by individual local rules and regulations for this type of system,

which must be observed. Always use the latest edition of codes. The

installation, adjustment, service, and maintenance of the solar water

heater must be done by a licensed professional who is qualied and

experienced in the installation, service, and maintenance of solar hot

water systems.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

Households with small children, disabled, or elderly persons may

require a 120oF or lower temperature setting to prevent severe

personal injury or death due to scalding.

G. Water Temperature Adjustment

An ASSE 1017 rated mixing valve to avoid severe burns or death from

scalding temperatures IS REQUIRED PER SRCC OG-300.

D. Evacuated Tubes

Be careful when handling the evacuated tubes, as they will break if

knocked heavily or dropped.

E. High Temperatures

• Insunlight,thecopperplumbingports canreachtemperatures

in excess of 392oF. Thick leather gloves must be worn when

handling hot components to prevent serious burns.

• Keep solar hot water system and components away from

children and animals.

• In an installed, fully plumbed system, if the pump is stopped

in sunny conditions, the copper ports and piping can easily

reach temperatures in excess of 320oF. Caution should be

taken when handling such components.

• Do not store combustible materials (dry leaves, tree branches,

gasoline, etc.) in the vicinity of the solar system.

Failure to follow these warnings could lead to property damage,

serious personal injury, or death.

F. Safety Precautions

In addition, to prevent

scalding, the high

temperature of the

potable water must be

limited using an ASSE 1016

tempering valve. This valve

is usually located between

the hot water storage tank

and faucets in bathrooms,

kitchens, etc. Tempering

valves are mandatory

under most codes and

usually set to a maximum

of 120oF. Tempering valves

must be rated for high-

temperature solar use.

H. System Water

Do not use petroleum-

based cleaning or sealing

compounds in a solar water

heating system. Gaskets

and seals in the system

may be damaged. This

I. Freeze Protection

NOTE: Consider piping and installation when determining solar

collector location. Place the solar collector as close to the water

heater as possible.

Failure of the solar system or components due to freeze related

damage IS NOT covered by product warranty.

Part 2 - Important Information

A. Scope of this Manual

Thismanualpertainsonlytotheinstallationandoperation of thesolar

collector. Details for the installation, operation, and maintenance of

the complete solar gas/electric water heating system, including, but

not limited to: the storage tank, gas/electric booster, pump, system

controller, valves, and other plumbing components, should be

provided separately by their respective manufacturers.

NOTE: This manual is primarily a reference document for authorized

installation individuals, as the solar collector is not permitted to be

installed by non-authorized persons.

If exposed to sunlight, hot, and have internal pressure built up, the

tubes may explode rather than implode if knocked and broken. This

is a rare occurrence, but safety precautions should be taken. To avoid

personal injury, wear safety glasses and leather gloves at all times

when handling evacuated tubes.

When installed, evacuated tubes may break if struck by a hard object

with enough force (e.g. a branch falling on the roof). During installation,

consideration should be taken as to the possible path any broken glass

may take. Where possible, protection should be provided to prevent

broken glass from reaching ground level where somebody could walk

on it.

THE INSTALLER SHOULD MAKE THE HOMEOWNER AWARE OF THE

SOLAR COLLECTOR LOCATION AND THE POSSIBLE VICINITY OF

BROKEN GLASS IN THE EVENT OF AN EXTREME STORM OR HEAVY

OBJECT FALLING ON THE COLLECTOR.

• Always wear safety glasses when handling evacuated tubes.

• Wear thick leather gloves when handling metal components

and hot plumbing components, including hot heat pipes.

• Adhere to safety regulations when working on roofs (or at a

height).

• Always obtain engineer approval for installations in high wind

regions.

• Assembly of the solar hot water system requires two persons

with the ability to lift 50 pounds each.

• It is best to install the solar hot water system on a cool, cloudy

day.

• Store evacuated tubes in dark or shaded places until insertion

into the manifold.

• Use of lead solder is expressly prohibited. Use of galvanized

steel, CPVC, PVC, PEX, or any other type of plastic pipe is

prohibited. B. Local Standards and Authorized Persons

Installation must be completed in accordance with local standards

and regulations.

Installation must also be completed by a qualied tradesperson

who holds relevant industry licenses or certicates. The term

“authorized person(s)” used throughout this document refers to a

suitably qualied professional. Unless otherwise specied, no part

of the solar collector may be inspected, repaired, or maintained by

anybody other than an authorized person.

can result in substantial

property damage.

Do not use “homemade

cures” or “patent

medicines”. Damage to the system, substantial property damage,

and/or serious personal injury may result.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

C. Terminology

Solar terminology diers from region to region. To avoid confusion,

please note the following:

Supply – The plumbing line running from the outlet of the collector

to the tank.

Return – The plumbing line running from the tank (or heat

exchanger) to the inlet of the collector. This line incorporates the

circulation pump.

Insulation - Solar radiation level, expressed in kWh/m2/day or Btu/

ft2/day.

D. Possible System Designs

1. Open Loop Systems

An open loop system has potable water circulating through

the solar collectors. Open loop systems are recommended for

hot or warm climates that rarely freeze. For rare incidents when

ambient temperature drops below freezing, the controller can

be programmed to provide freeze protection by circulating warm

water from the tank through the solar collectors.

For open loop systems, the normal operating pressure should be

less than 72.5 psi. This operating pressure is provided via use of

a pressure limiting/reduction valve on the main supply line. An

expansion tank is required in open loop systems.

An open loop system may allow the solar collectors to stagnate to

prevent overheating of the storage tank. In the event of component

failure, the pressure relief valve must be able to release the

increased pressure, and should be rated to meet the maximum

possible pressure output of the solar collector(s). Please see Part 3

for sections regarding overheating.

2. Closed Loop Systems

A closed loop system uses non-potable heat transfer uid (HTF)

and must be pressurized to less than 72.5 psi. Closed loop systems

require an expansion tank to accommodate HTF expansion. The

system should be designed to minimize stagnation after tank

temperature has been met; extensive stagnation may increase pH

levels and glycol deterioration.

The expansion tank and plumbing must be properly sized so that

the safety pressure relief valve will not activate except in the event

of component failure or extreme conditions. The pressure release

must be set at no more than 113 psi. (There may be exceptions in

engineered designs for tall buildings.)

3. Drain Back Systems

The drain back method provides eective overheating and freeze

protection, making these systems well-suited for all climates.

When storage tank water temperature settings are reached or the

collector temperature falls below a set temperature, the pump shuts

o, allowing the HTF to drain back into the tank. Some drain back

systems use potable water as HTF. Others use a propylene glycol /

potable water mix.

Drain back systems require larger pumps to move HTF up and into

the solar collectors. Mounting the drain back tank as high as possible

within conditioned space will reduce pump size.

For drain back systems, the solar loop often operates at less than

25 psi, far lower than open or closed loop systems. These low

operating pressures do not require an expansion tank. A pressure

relief valve, installed on the drain back tank and piped in copper to

an appropriate drainage location, will provide sucient expansion

protection. This pressure relief valve and drain outlet pipe must

never be sealed or blocked. The pressure relief valve is intended to

be operated for safety purposes only.

NOTE: Supply and return connections to the collector must use

eccentric ttings or a tting arrangement that allows full draining

of header pipes. The collector or array should be mounted with a ¼”

pitch towards the supply port to facilitate the drain back process.

E. Fluid Quality

Water quality is very important. Water in direct ow through the

solar collectors must rst meet potable water requirements; any uid

circulated through the collectors should be non-corrosive to copper. In

addition, water quality must meet the following requirements.

Total Dissolved Solids < 500 ppm

Total Hardness < 7 grains (120 ppm)

Chlorides < 100 ppm

pH Levels 6.5 - 8.5

Table 1 - Water Quality Requirements

In areas with “hard” water (water hardness greater than 120 ppm)

where open loop format is used, lime scale may form inside the solar

collector. Scale deposits will reduce collector eciency and eventually

plug the collectors. In such regions, it is advisable to install a water

softening device to ensure the long term ecient operation of the

collector, or consider a closed loop system.

In order to meet health and safety regulations, glycol used should be

food grade propylene glycol, FDA rated as “generally recognized as

safe” (GRAS). If using a glycol / potable water mix, the water must meet

the above requirements. The glycol content of the liquid must not

exceed 50%, unless the manufacturer species that a dierent ratio

is recommended for use with solar water heaters. Glycol should be

checked periodically to prevent it from becoming acidic. Please refer

to guidelines provided by the glycol manufacturer regarding glycol

maintenance.

In addition, collector plumbing should slope toward the drain back

reservoir at ¼” per foot minimum to facilitate the drain back process.

If continual slope is not achievable, consider a pressurized closed loop

system.

F. Corrosion

Both copper and stainless steel are susceptible to corrosion when,

amongst other factors, high concentrations of chlorine are present.

The solar collector may be used for heating of spa or pool water, but

levels of free chlorine must not exceed 5 ppm. Otherwise, the copper

header could corrode.

NOTE: HTP DOES NOT WARRANT THE SOLAR COLLECTOR AGAINST

CORROSION-RELATED DAMAGE.

G. Freeze Protection

Freeze protection must be implemented in any regions that may

experience freezing conditions at any time throughout the year.

“Freeze tolerance limits are based upon an assumed set of

environmental conditions. Extended periods of cold weather, including

ambient air temperatures below the specied limit, may cause

freezing in exposed parts of the system. It is the owner’s responsibility

to keep the system’s freeze protection levels maintained in accordance

with the supplier’s instructions if the air temperature is expected to

approach the specied freeze tolerance limit.”

Open or closed loop systems: In areas with temperatures not falling

below 23oF, a dierential solar controller with freeze protection may

be used (e.g. requiring pump to circulate if the manifold temperature

approaches freezing). In an open loop system, a freeze valve (which

opens to allow water to dribble out) could also be considered.

Closed loop systems: In areas with temperatures falling below 23oF, a

propylene glycol / potable water mix should be used to provide freeze

protection. Please refer to glycol manufacturer’s specications about

the temperature ranges the liquid can withstand. Only food grade

propylene glycol, FDA rated as GRAS, should be used.

NOTE: HTP DOES NOT WARRANT THE SOLAR COLLECTOR AGAINST

FREEZE-RELATED DAMAGE.

H. Wind Stress

When installing the collector, please consider the issue of wind

lp-220 Rev. 000 Rel. 007 Date 2.12.18

I. Snow Load

In areas prone to heavy snowfall, the solar collectors should ideally be

installed at an angle of 50oor greater to help promote snow sliding

o the tubes. In addition, it is advisable to raise the lower collector

frame o the roof surface 6 – 8 inches or higher. Doing this places the

collector above moderate snowfall accumulation and allows drifting

snow to more easily slide out from under the collector, which helps

ensure that snow does not cover the collector array. A front track

extension can be used for this purpose.

Please refer to local regulations regarding snow loading precautions.

J. Storage Tanks

It is recommended that the lever on the pressure and temperature

relief valves (PTRV) on main pressure hot water storage tanks be

operated once every 6 months to ensure reliable operation. It is

important to raise and lower the lever gently, and be careful as the

water released will be HOT. Failure to operate the PTRV on a regular

basis could lead to failure of the component and the possibility of the

storage tank exploding.

It is recommended, and may also be a local regulation, that, in order to

expel water safely, the PTRV have a copper pipe connected and run to

an appropriate drainage location. The PTRV and drain outlet pipe must

not be sealed or blocked.

NOTE: If the water heater is left in an operating condition and not used

for two weeks or more, a quantity of highly ammable hydrogen may

accumulate in the top of the water cylinder.

To dissipate hydrogen safely, it is recommended to turn on a hot

water tap for several minutes at a sink, basin, or bath, but not a

dishwasher, clothes washer, or other electrical or heat producing

appliance. During this process, there must be no smoking,

open ame, or electrical appliance operating nearby. Hydrogen

discharged through the tap will sound like air escaping. Failure

to dissipate hydrogen properly could result in explosion and re,

serious property damage, severe personal injury, or death.

K. Hail Resistance

Glass evacuated tubes are surprisingly strong and able to handle

signicant impact stresses once installed. Testing and impact stress

modelling proves that evacuated tubes, when installed at an angle of

40oor greater, are able to withstand impact from hail larger than 1” in

diameter. The ability of evacuated tubes to withstand hail impact is

greatly inuenced by the angle of impact, so installing the collectors

at low angles does reduce their impact resistance.

It is recommended that in areas prone to large hail (> 3/4”) the solar

collector should be installed at an angle of 40oor greater to provide

optimum protection. This is generally a common installation angle, as

many populated areas in the world fall within 30-70olatitude.

Part 3 - Installation Information

A. Transport, Unpacking, and Inspection

When possible, transport the boxes of evacuated tubes standing

upright, taking notice of the THIS WAY UP arrows. If the boxes

can only be laid down, always place on a at, rm surface such as

compressed wooden board. If stacking the boxes, do not exceed

3 layers and strap in place to avoid movement. Straps should be

padded with thick cardboard or similar padding at corners to avoid

cutting into the boxes.

Component List

Please familiarize yourself with the components listed on the

packing list. If any components are missing, and/or additional part(s)

are required, please contact your supplier.

Part A: Manifold Legs - (3) Three Pieces

Shorter than Part D

Part B: Back Brace - (4) Four Pieces

Longer than Part C

Part C: Horizontal Support Brace - (3) Three Pieces

Shorter than Part B

Part D: Manifold Arm - (3) Three Pieces

Shorter than Part A

Part E: Clamp - (6) Six Pieces

Part F: Triangle Plate - (3) Three Pieces

Part G: Feet - (6) Six Pieces

If a tube should break, it can easily be replaced. Though a reduction

in heat output will result, the solar collector can still function

properly with one or more broken tubes (heat reduction depends

upon how many tubes are broken). A broken tube should be

replaced by authorized persons only.

resistance and the resultant stress on attachment points. Adhere to

relevant building codes/regulations regarding installation of such

objects.

For ush mounting on a pitched roof, a minimum of two attachment

points per front track must be made, each with minimum pull strength

of 220 lbs. If this cannot be achieved, additional attachment points

must be made to achieve minimum strength levels.

If installing the low, mid, high or xed angle roof frames, a minimum

of two attachment points per front track must be made, each with a

minimum pull strength of 330 lbs. If this cannot be achieved, additional

attachment points must be made to achieve minimum strength levels.

It is the responsibility of the installation contractor to ensure that the

frame mounting is of suitable strength. Where applicable, inspection

by building department ocer or equivalent should be completed to

ensure the installation is in accordance with relevant regulations.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

Part H: Nut - (50) Fifty Pieces

Part I-1: Small Bolt - (40) Forty Pieces

Part I-2: Large Bolt - (10) Ten Pieces

Part J: Base Tube Frame - (1) One Piece

Part K-1: Plastic End Cap (Female) - (20) Twenty Pieces

Part K-2: Plastic End Cap (Male) - (20) Twenty Pieces

Part L: Evacuated Tube - (20) Twenty Pieces

Part M: Manifold - (1) One Piece

Part N: Fit Ring - (20) Twenty Pieces

Table 4 - Collector Specications and Dimensions

Open the tube boxes, which contain the evacuated tubes with

inserted heat pipes. Make certain all tubes are intact, and the

bottom of each tube is silver. If a tube has a white or clear bottom,

it is damaged and should be replaced. The heat pipe should be

removed from the damaged tube and inserted into a replacement

tube, available at your local HTP dealer.

Heat pipes are bright and shiny when newly manufactured, but will

dull and may form dark-grey surface discoloration over time. This

mild surface oxidation happens when the pipe is exposed to air. This

reaction is completely normal and does not aect the integrity of

the pipe.

Tube and Heat Pipe Inspection

COLD WEATHER HANDLING - If the solar collector or components

have been stored in a very cold location (BELOW 0oF) before

installation, handle with care. Failure to do so could result in damage

to the collector or evacuated tubes. Such damages are not covered

by warranty, and could result in property damage or severe personal

injury.

B. Collector Dimensions and Weights

Model HP-30SC

# of Tubes 30

Weight (lbs.) 252

Dimensions (Inches) 101 X 79 X 58

Net Aperture Area (ft2) 30.04

Storage Tank Size (Gallons) 70+

Nominal Flow Rate (Gal/Min) 0.84 gallons per collector

C. Tools and Materials

Make sure you have all necessary tools, materials and accessories

before beginning work on the solar system.The following is a minimum

list of basic required tools. Other plumbing components will be eld

supplied according to installation needs.

Electric Drill Drill Index (w/ 1/2” and

3/4”Wood Bits) Torch and Striker

Putty Knife Hack Saw High Temperature

Joint Compound

Tubing Cutter Tin Snips Solder Flux

Tape Measure Emory Paper 24” Level

Extension Cord Slip Joint Pliers Needle Nose Pliers

Silicon Caulk and

Roof Tar

Pipe Wrenches, 10”

and 14” Angle Iron

Open End Wrenches

9/16 & 7/16

Screw Driver 6”Flat

Blade

Screw Driver 6”

Phillips

Wire Stripper or

Knife Wire Cutters Black Latex Outdoor

Paint

Adjustable

Wrenches 8”& 10”

Aluminum Flashing

Sheet Flashlight

Wire Nuts or

Connectors

Miscellaneous Copper

Pipe and Fittings (3/4”) 1” Copper Tee

1” by 1/2” Bush 1’ Reducer - 1/2” or

3/4”

5/8” X 1/2” wall &

7/8” X 1/2” wall

insulation

1/2” ID and 3/4”

ID Type M Copper

Tubing

Threaded Rod, Nuts,

and Washers

Stainless Screw

Clamps

Thermal Adhesive

Table 2 - Included Components

Do not remove and/or expose the tubes to sunlight until ready to

install, otherwise the heat pipe tip will become hot enough to cause

serious burns.

NOTE: HTP DOES NOT WARRANT THE COLLECTOR, EVACUATED TUBES,

OR HEAT PIPES AGAINST FAILURE AS A RESULT OF DAMAGE INCURRED

DURING TRANSPORT OR INSTALLATION.

D. System Design

System design should be completed prior to installation. Solar

collectors need to be installed correctly to ensure high eciency and,

Table 3 - Basic Required Tools

lp-220 Rev. 000 Rel. 007 Date 2.12.18

E. Delta-T Controller Settings

Usually a Delta-T ON value of 8 – 20oF and Delta-T OFF value of 4 -

10oF is appropriate. These settings may need to be altered slightly

according to location and system design. Refer to the instruction

manual provided with the chosen solar controller for appropriate

settings.

F. Stagnation and Overheating

Stagnation refers to the condition that occurs when the pump stops

running. This can be due to pump failure, power blackout, or as a result

of a high tank temperature protection feature built into the controller

which turns the pump o.

If the system is designed to allow stagnation as a means of preventing

tank overheating, the collector and plumbing in close proximity may

reach temperatures greater than 395oF; components that may be

exposed to these high temperatures, such as valves, plumbing, or

insulation, should be suitably rated.

If the system is designed to allow stagnation of the collector when the

tank reaches a set maximum level, steam may form in the collector(s).

In such a system, temperature relief valves or auto air vents should

be isolated (using an isolation valve) on the collector outlet, as these

options may not be able to withstand the high temperatures and allow

stable stagnation of the collector (may dump hot water).

In the event of component failure or extreme conditions, the PTRV on

the hot water storage tank may open as a safety measure. Under such

conditions, the collector will normally reach a maximum temperature

of around 320oF. Any heat returning from the collector is generally

not enough to cause a continued increase in tank temperatures (e.g.

heat input is less than tank heat losses), and therefore is able to meet

requirements in some regions limiting hot water dumping. A crackling

noise may be heard coming from the supply line when hot water is

used as the pressure in the system drops and steam forms. This is

normal.

G. Sizing System to Avoid Overheating

The system should be sized so that overheating of the tank is dicult

to achieve in a single day, even during hot, sunny periods. If the system

is oversized, such that excessive heat is often produced during summer

months, consider installing a drain back system, a heat dissipater

unit, and carefully review the points in Part 3, Section H, Preventing

Overheating.

H. Collector Angle, Plane, and Direction

1. Collector Direction

The collector should face the equator. In the northern hemisphere,

this is due south, and in the southern hemisphere, due north. Facing

the collector in the correct direction and angle is important to ensure

optimal heat output. A deviation of up to 15ofrom due south is

acceptable, and will have minimal eect on heat output.

NOTE: In Figure 1, D orientation (landscape) is not recommended for

drain back systems.

2. Collector Angle (Tilt)

It is common for collectors to be installed at an angle that corresponds

to the installation latitude.While adhering to this guideline, an angle of

latitude +/- 10ois acceptable, and will not greatly reduce solar output.

The solar collector should be installed at an angle between 20 – 80oto

ensure optimal operation.

For year-round domestic hot water, the collector should be tilted to

an angle of equal to the latitude of the installation site. Add 15oto the

latitude to optimize for winter performance (space heating). Subtract

15ofrom the latitude to optimize for summer performance (indirect

pool heating).

Mounting Methods:

A, B - Sloped Roof

C - Flat Roof

D - Ground Mount

E - Facade

Figure 1 - Suggested Solar Collector Mounting Designs

3. Collector Plane (Horizontal or Vertical)

The collector could be installed vertically, but may be installed at an

angle, such as sideways on a pitched roof. It is not recommended

to install a drain back system in the horizontal or landscape style. In

vertical installations, collectors should be installed with a 1/4” pitch

towards the supply port to facilitate the drain back process. See

more detail in Part 2, Section D, Number 3. The collector must not

be installed upside down (tubes pointing upwards) or with tubes

lying horizontally. The heat pipes will not function.

I. Avoid Shade

Collectors should be located so that shading does not occur

between 9 AM and 3 PM local time. Partial shading due to small

objects such as antennas and ues is not of great concern.

J. Location

To avoid long pipe runs, the collector should be positioned as

close as possible to the storage tank. Storage tank location should

therefore be considered part of the location requirements of the

solar collector. The storage tank should be located as close as

possible to the most frequent draw o points in the building.

K. Expansion Tank

Expansion of HTF occurs as it heats. When HTF expands, it has to

be controlled, as uid cannot be compressed like air. A properly

sized and installed expansion tank can accommodate expansion

of HTF. If the expansion tank fails, a properly sized and installed

PTRV will activate and protect the system. Failure to properly

control HTF expansion may result in property damage, personal

injury, or death.

most importantly, safe and reliable operation. Please seek professional

advice for the design and installation of your solar heating system.

NOTE: Only authorized licensed contractors are permitted to install

the solar collector.

Given the formula above, a solar collector installed at 30oN latitude

should face due south at an angle of 45ofor wintertime advantage,

and 15ofor summertime heating.

Preventing Overheating

To reduce summer heat output, angle the collector for optimal

winter absorption. This is achieved by installing the collector at

an angle of around 15oabove the latitude angle (e.g. 45oat 30oN

latitude). This angle corresponds closely to the angle of the sun in

the sky during the winter months, thus maximizing winter output.

Conversely, during the summer when the sun is high in the sky,

the relative collector surface area exposed to sunlight is reduced,

cutting overall heat production considerably (by about 15%). This

option is ideal for installations where solar thermal is being used for

space heating.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

See the following requirements for expansion requirements specic

to application.

1. Open Loop Systems

Open loop systems have a check valve/non-return valve on the cold

main. Expanded water is released via the PTRV, which is mounted

on the tank or solar collector loop. To prevent wasteful dumping

of water, it is required to install a potable water expansion tank on

open loop systems.

2. Closed Loop Systems

Closed loop systems should always be installed with a solar

expansion tank. Refer to the solar expansion tank manufacturer’s

guidelines regarding correct sizing.

3. Drain Back Systems

Expansion tanks are not required in drain back system design.

L. Lightning Protection

To avoid lightning related damage or electrical safety issues, it is

advisable to earth/ground the frame and copper circulation loop of

the collector.

M. Pipe Sizing and Connections

HTP solar collectors are provided as standard with 1” copper pipe

ports. For domestic heating applications with 1 or 2 collectors,

nominal 1/2” piping is suitable. For applications using 2 - 4 solar

collectors in series, it is advised to use nominal 3/4” piping. For 5

collectors, use 1” pipe. For drain back systems, use 3/4” pipe for 1 –

4 collectors and 1” pipe for 5 collectors. In connections of banks of

collectors, larger pipe sizes should be used as required for the given

application, with consideration given to ow rates, pressure drops,

and pump sizing.

The material used for the solar loop must be able to withstand the

operating temperatures and pressures to which the system may

be exposed due to normal or extraordinary conditions (e.g. pump

failure or power outage). Copper or stainless steel pipe is the most

widely used piping material for solar applications.

N. Connection of Multiple Collectors

The maximum number of collectors that can be connected in

series is 5. If the entire installation requires more than 5 collectors,

use parallel strings of an even number. If even numbers cannot be

achieved on parallel strings, ow balancing valves must be installed

to ensure each collector has the same ow.

When connecting collectors in series (5 maximum), exible

connections should be used between each collector in order to

allow for expansion and contraction of the copper header with

temperature changes. Failure to use exible connections between

consecutive END port collectors may result in damage to the header

if the system stagnates.

In drain back systems, supply and return connections to the collector

must use eccentric ttings or a tting arrangement that allows full

draining of header pipes. The collector or array should be mounted

with a 1/4” pitch towards the supply port to facilitate the drain back

process. In addition, collector plumbing should slope toward the

drain back reservoir at 1/4” per foot minimum to allow the system

to drain. If continual slope is not achievable, consider a pressurized

closed loop system.

NOTE: HTP does not warrant the collector against damages resulting

from poorly managed header expansion and contraction.

O. Potable Water

If the system is open loop direct ow, meaning that potable water is

owing through the collector, any components used in the system

must meet potable water requirements.

P. Mounting Frame

HTP solar collectors are supplied with an adjustable, extruded

aluminum frame, which allows installers to change the angle of

Q. Galvanic Reaction

Zinc galvanized components should NOT be installed in direct

contact with stainless steel or aluminum, as galvanic reaction

between metals can cause premature oxidation of the zinc coating,

as well as the steel and aluminum underneath, leading to premature

solar system failure and property damage. Such damages ARE NOT

covered by product warranty.

Avoid using galvanized steel bolts. Use stainless steel components

instead. If galvanized components ARE used, avoid direct contact

between two metals by using rubber/plastic separators.

If roof surface is galvanized steel, refer to manufacturer’s corrugated

roof installation guidelines.

Part 4 - Collector Installation

Installing Clamp to Manifold

1. Place the

manifold at

so the bolts are

facing up.

2. Remove nuts

attached to bolts

on manifold.

3. Secure clamps

to the bottom

of the manifold

using a ½”

ratchet.

Installing Clamp to Base Tube Frame

1. Secure clamps

to the base tube

frame using short

bolts.

2. Tighten the

bolts with ½”

ratchet.

Ensure the mounting surface is solid and able to withstand in

excess of 330lbs of pull force that may be encountered during high

winds. Consult a structural engineer if in doubt. Failure to follow

this information could result in property damage, severe personal

injury, or death.

the collector to maximize eciency and suit a range of dierent

installation formats. Feet are supplied to fasten the panel securely to

the roof. It is important that frame attachment points and externally

supplied fasteners are of suitable structural strength and corrosion

resistance. Be sure to tighten all hardware securely.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

Installing Manifold and Base Tube Frame to Manifold Arms

1. Space out

manifold arms so

the rails line up

with the clamps

on the manifold

and the base tube

frame.

2. Slide in the short

bolts in the arms

rst.

3. Slide small bolts

into the rail before

securing any nuts.

Align so the ends

of the clamps are

ush along the

end of the rails.

4. Secure manifold

to manifold arms.

5. Secure the

bolts with nuts

and tighten with

ratchet.

6. Line up the

clamps on the

base tube frame

to the manifold

arms.

7. Slide in short

bolts in the arms

rst.

8. Secure the bolts

with nuts and

tighten with ratch-

et.

Installing Triangle Plate Assembly

1. Slide two

short bolts in the

manifold arm.

2. Align the edge

of the triangle

plate to the edge

of the manifold

arm.

3. Secure the

triangle plate to

the manifold arm

with nut, tighten

with ratchet.

4. Repeat for the

next two arms.

Installing Legs to Assembly

For Tilt / Angled Mounting - For Flat Mounting, Skip to Flat

Mounting, this Table

Installing Feet to Assembly

1. Slide manifold

legs onto the top

bolt of the triangle

plates.

2. Align the edge

of the manifold leg

with the corner of

the top edge of the

triangle base plate.

The legs should be

able to pivot about

the bolt without

interference.

1. Place feet on

the side of the

manifold leg

facing outward.

The foot on the

middle leg can

be placed on

either side.

2. Align so

bottom of the

foot is ush along

the bottom of

the manifold leg.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

3. Attach feet to

manifold arms.

4. Align so foot

is ush to the

bottom of the

manifold arms in

the same direction

as the feet on

manifold legs.

Installing the Supports

1. Attach back

brace across

manifold legs.

2. Align so both

are 11 inches

from the edge

of the manifold

legs.

3. Attach the

remaining back

brace supports

across the previous

ones, creating an

4. Ax the back

brace supports

together with a

large bolt through

the middle of both

supports.

5. Attach

horizontal

supports at the

midpoints of

manifold legs

and arms.

6. These supports

can be adjusted

along either

support in order

to create the

desired angle.

Flat Mounting Installing Evacuated Tubes

Face feet outwards

and attach to the

manifold arms.

Feet on the middle

support can face

either side.

1. Unscrew

plastic end caps.

2. Insert t ring

into hole in

manifold.

3. Apply a small

amount of liquid

soap or other

non-flammable

lubricant around

the marked area

to ensure smooth

insertion.

4. Place evacuated

tube through end

cap and screw into

manifold.

5. Screw plastic

end cap back into

place.

6. When evacuated

tubes are fully

installed, wipe

clean with liquid

glass cleaner

and cloth/paper

towels.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

CAUTION

Do not spray water into the evacuated tube(s). Doing so may damage the tube(s).

Completed Collector Detail

Angled Collector Flat Mounted Collector

Part 5 - Roof / Wall Mounting Suggestions

Working on the roof is extremely dangerous. Plan the installation

carefully such that a safe distance from the edge can be maintained.

Sure footing is also required. Be sure to wear sturdy, rubber soled

shoes. NO SANDALS OR FLIP FLOPS. Harnessing equipment for fall

prevention is mandatory.

Be sure that the roof is dry before beginning installation. Be sure

that any ladders are set rmly against the side of the building and

mounted properly. Have someone hold the ladder for you while you

climb.

Be aware of any electric or water lines before drilling into the roof.

Plan the installation accordingly.

The following details suggested roof attachment methods:

J Bolt Penetration

Failure to follow this information could result in property damage,

serious personal injury, or death.

Lag Bolt Penetration

Threaded Bolt Penetration

A. Roof Mounting

In order to meet strength requirements in areas with winds up to 130

mph and category “D” exposure, collectors should be mounted into

roof studs using lag threaded bolts or J bolts. Any other installation

format should be approved by a structural engineer.

When attaching to the roof surface, it is important to ensure proper

sealing to prevent water penetration. It is also important to consider

the building structure and roof construction type to ensure the

structure is adequate for the collector’s weight and can withstand

wind loads as determined by local codes. For commercial buildings,

it is especially recommended to consult a structural engineer.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

Example of Roof Flashing

When installing a collector that will be raised and not ush to the

roof, the increase in wind stress at the mounting points must be

considered. Consult local wind load requirements.

Use larger stainless steel lag bolts to fasten the collector feet to a at

roof. If standing water may gather on the roof around the collector,

ensure that all mounting and plumbing holes are thoroughly sealed

and waterproofed.

Figure 2 - Collector Orientation

B. Flush Pitched Roof Installation

1. Tiled Roof Attachment

For tiled roofs, carefully plan the location of the manifold, frame

tracks and plumbing in order to minimize the number of tiles that

need to be removed and returned into place. Tiles may have holes

cut to allow the roof straps or bolts to pass through. Any holes must

be covered and/or sealed with standard roong materials to avoid

leaks.

For tiled roofs, 2’ or 3’ long roof attachment straps can be used

(2 per front track). One end of each strap should be secured to

the underside of the frame front tracks using bolts and nut lock

assemblies; the other end secured to structurally secure roof framing

using 0.3” / 8mm diameter or thicker stainless steel bolts or screws.

Please ensure that roof-anchoring points are of suitable structural

integrity. Once the upper straps are attached and tightened, adjust

the bottom straps to ensure that they too are providing support to

the frame.

2. Corrugated Iron Roof Attachment

For installation on a corrugated iron roof, a thick rubber pad can be

used to separate the frame from the roof and also seal the drill hole.

Use a standard corrugated iron roong screw to secure the collector

front feet directly to the roof’s wooden frame (additional holes may

need to be drilled in the frame front track to properly secure the

collector).

If the roong screw is zinc galvanized steel, it should have a rubber/

nylon washer to prevent direct contact with the stainless steel frame.

The rubber pad will form a tight seal against the roof, preventing

any water ingress. Addition of some silicone sealant beneath the

3. Asphalt Shingle Roof

For installation on an asphalt shingle roof, the same corrugated roof

method outlined above can be used, the lone dierence being that an

extra thick rubber pad should be used to compensate for collector feet

sinking into the asphalt.

C. Low Pitched Roof Installation

When installing a tilt/angled collector on a low pitched roof, follow

the attachment instructions above. The solar collector’s horizontal

supports easily slide along the manifold arms and legs into the proper

installation angle. Minimum pitch must be no lower than 25ofor

panels to perform properly.

D. Flat Roof Installation

Use .4”/ 10mm diameter or larger stainless steel lag bolts to fasten the

collector feet to a at roof. If standing water may gather on the roof

around the collector, ensure that all mounting and plumbing holes are

thoroughly sealed and waterproofed.

E. Wall Mounting

Wall attachment methods depend largely on wall material. For brick

or concrete walls, secure collector feet with stainless steel expansion

bolts. For wood or synthetic boarding, stainless steel screws that can

penetrate into the wall framework may be suitable for mounting. If

the strength of these screws is a concern, use bolts that run directly

through the wood with a large washer or metal plate positioned

before the nut.

Ensure the surface is solid and able to withstand in excess of 150kg

/ 330lbs of pull force that may be encountered during high winds.

Consult a structural engineer if in doubt. Failure to do so could result

in property damage, serious personal injury, or death.

Always consider the weight of the collector and the structural

integrity of the wall. HTP requires that installations be inspected and

approved by authorized building inspectors and comply with state

and local codes. Failure to take this information into consideration

could result in property damage, serious personal injury, or death.

Take note to adhere to the maximum collector angle of 80o, otherwise

heat pipe performance may be reduced.

Also, consider possible shading from eaves, particularly in the summer.

This may be included in system design to minimize summer heat

output. Another advantage of installing under an eave overhang is to

minimize snow buildup on the collector in areas with regular snowfall.

Even with snow sitting on the bottom of tube, the heat pipes will

work eectively to conduct heat, as inner tube temperature becomes

fairly even for the full length of the tube due to heat transfer by the

aluminum ns.

If installing on a wall such that the collector is above a walkway, please

consider the danger associated with broken glass that could fall if the

tubes were ever damaged (e.g. during an extreme storm, a tree branch

falls on the collector). It may be necessary for a barrier to be installed

below the collector to catch any such falling materials.

pad and inside the hole is advisable to help waterproof the installation.

This mounting method is also suitable when attaching a low or mid

angle solar collector.

Part 6 - Plumbing Connections

Once the frame has been mounted and the manifold attached, the

manifold header may be connected to the system plumbing.

If the collector (including evacuated tubes) is to be installed prior

to plumbing connection (e.g. on a new house), high temperature

resistant covers should be placed over the header inlet and outlet to

prevent any contaminants entering the header (e.g. aluminum foil).

lp-220 Rev. 000 Rel. 007 Date 2.12.18

A. Temperature Sensor Insertion

The temperature sensor port is located beside the inlet and outlet

ports. Generally the temperature should be sensed at the outlet of the

manifold. Ensure that sensors and cable used on the collector are high

temperature rated (up to 395oF).

The solar controller temperature sensor should be coated with a thin

layer of thermal paste and inserted into the sensor port to the full

depth. If the t is too loose, slide a piece of copper or stainless steel

plate/wire in beside the sensor.

Ensure that pipe insulation is watertight. Use silicone sealant to ensure

a watertight seal against the manifold.

B. Header Connection

Never use dielectric unions or galvanized steel ttings when

connecting to a stainless steel storage tank or heater. Use only

copper or brass ttings. Teon thread sealant must be used on

all connections. Failure to follow this information could result in

premature product failure and property damage. Such damages ARE

NOT covered by product warranty.

Non-Galvanized Connections / Pipe Fitting

To ensure a sound seal, use plumbing thread glue or Teon tape

approved for use in glycol based systems.Tighten using two wrenches,

taking care not to stress the copper pipe. Do not over tighten.

Brazing/Sweating/Soldering to the collector is acceptable, but not

recommended, as doing so can damage the manifold casing. Ideally,

place a wet cotton cloth against the rubber seal to prevent heat

damage.

C. Air Purge

Once the inlet and outlet are connected to the plumbing system, the

collector loop should be purged of air.

1. Open Loop

For a system without an auto-air vent, a drain valve on the supply line

should be installed along with a ball valve or a metal coin vent on the

tank side. With the ball valve closed, the drain valve can be opened to

allow air to escape as water pressure forces through the line.

When opening the drain valve, released water may be hot. Steam

may release as well. Failure to take caution when opening drain valve

could result in serious personal injury or death.

Once the drain valve no longer releases air, close it. Then open the ball

valve so normal operation may begin.

If an auto-air vent is installed on the outlet of the collector, air will

automatically eliminate from the solar line. If using a manual air vent,

open it until all air is eliminated.

2. Pressure Open Loop

Run the pump at the highest speed setting, forcing air out of the

manifold and back into the tank. If an auto-air vent is installed on the

outlet of the collector, air will automatically eliminate from the solar

line. If using a manual air vent, open it until all air is eliminated.

3. Closed Loop

The solar loop may be lled with potable water (drain back system)

or a glycol / potable water mix, unpressurized (drain back system), or

vented and pressurized. The exact process will depend on the design

of the loop and components used.

NOTE: A drain back system does not need to be purged.

D. Plumbing Check

Once plumbing is conrmed leak free and all air has been purged the

heat pipes and evacuated tubes may be installed.

E. Glycol Freeze Protection

Only use food grade propylene glycol, FDA rated as GRAS (Generally

Recognized As Safe), with additives that provide resistance to

breakdown during high temperatures. Glycol pH should be checked

periodically and replaced as specied by the manufacturer.

F. Insulation

Heavily insulate all piping running to and from the manifold with

high quality insulation of at least 0.6” thickness (thicker in cold

climates). Heat loss from the piping can be signicant. Particular

attention should be taken to insulate any possible points of heat

loss. Insulations should have a temperature rating of 250oF.

Ensure the insulation is tight against the collector casing, thus

minimizing heat loss from the inlet and outlet. High quality

silicone sealant should be used to prevent water from entering

the temperature probe port and/or in between the piping and

insulation foam.

Insulation foam exposed to direct sunlight should be protected

against UV related degradation by wrapping/covering with UV

protective material, such as adhesive back aluminum foil, PVC wrap,

or similar.

For systems designed to allow stagnation, high temperature rated

insulation such as glass wool or mineral wool should be used on

piping close to the collector (6’). Glass wool insulation may come

with an external foil wrap, but any cuts made during installation

should be sealed with watertight, UV stabilized material, such as

adhesive backed aluminum foil or PVC wrap.

Circulating pump volutes can be a source of signicant heat loss and

should be insulated. Some pumps come standard with a molded

foam casing which has good insulation properties. If the pump does

not have any insulation, the same foam insulation used on the pipe

can be used to cover the pump. This insulation should be secured in

place with good quality nylon cable ties or adhesive tape.

NOTE: Certain pumps are not designed to be insulated. Please

contact the pump manufacturer if in doubt.

All internal and external piping should be insulated. This includes at

least the 3”closest to the hot water outlet of the tank, as this copper

pipe is a signicant point of passive heat loss.

The solar collector will not be damaged by a short period of stagnation

(greater than 14 days).

G. Pump Selection

When selecting a pump, there are two basic solar designs to

consider: pressure glycol and closed loop drain back.

In pressure glycol systems, two factors determine pipe size. These

are:

• Flow rate in gpm (gallons per minute)

• Head loss

In drain back systems, an additional factor must be considered along

with the previous two:

• Lift

• Each collector has a nominal ow rate of about .84 gpm.

• When determining head loss, consider the following:

• Head loss pumping through the collector(s)

• Head loss pumping through piping and ttings

• Head loss pumping through a heat exchanger

*Drain back only: Determine the vertical lift from the water level in

the drain back tank to the top of the solar panels (vertical lift is the

same as head loss).

Refer to the chart below for pressure drop gures with a 40% glycol

solution. When using potable water as HTF, there is a further 20%

reduction in pressure drop.

NOTE: To convert psi to head feet, multiply psi by 2.31 and divide

total by specic gravity (1 for water, 1.02 for 30% propylene glycol,

1.04 for 50% propylene glycol).

After determining gpm ow rate and total system head loss, a

properly sized pump can be chosen. See recommendation from

pump supplier to determine the proper pump for your job. Incorrect

pump size will reduce or fail to deliver solar contribution.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

Table 5 - Pressure Drop through Collector with 40% Glycol Solution

To further increase solar production,

use a variable speed solar pump

controller (part # 8600-047).

Part 7 - System Piping Applications

Figure 3 - System Piping Applications

lp-220 Rev. 000 Rel. 007 Date 2.12.18

A. Cleaning

Regular rain should keep the evacuated tubes clean. However, if the

tubes are particularly dirty, wash with a soft cloth and warm, soapy

water or glass cleaning solution, ONLY if the collector is located in a

position which DOES NOT require climbing onto the roof or use of

a step ladder. If the tubes are not easily and safely accessible, high

pressure water spray is also eective.

If cleaning is required and the above outlined methods are not

suitable, the company that supplied and installed the solar collector

should be contacted.

D. Insulation

The pipes running to and from the collector should be heavily

insulated. This insulation should be checked periodically (at least once

every 3 years) for damage. For any insulation exposed to sunlight,

ensure protective cover/wrap/foil is in good condition. Replace as

required.

Part 8 - Maintenance

Under normal conditions the solar collector is maintenance free. Other

system components, such as the pump and glycol (if used) may require

periodic inspection and changing/maintenance. Please refer to the

documentation provided by the manufacturers of these components.

NOTE: Apart from those maintenance items outlined below, any

system inspection, maintenance, or repair should only be completed

by authorized persons. The solar collector warranty coverage MAY BE

VOIDED if non-authorized persons attempt to maintain or repair the

solar collector or associated components.

THE FOLLOWING BASIC MAINTENANCE MAY BE COMPLETED BY

THE HOME OWNER:

B. Leaves

Leaves may accumulate between or beneath the tubes. Please remove

these leaves regularly to ensure optimal performance and prevent a

re hazard. (The solar collector will not cause the ignition of ammable

materials). Such cleaning may only be completed by the homeowner if

the tubes are easily and safely accessible.

THE FOLLOWING MAINTENANCE MAY ONLY BE COMPLETED BY

AUTHORIZED PERSONS:

C. Broken Tube

If a tube is broken it should be replaced as soon as possible to maintain

maximum collector performance. The system will still operate normally

and safely with a broken tube. Any broken glass should be cleared

away to prevent injury. Protective gloves must be worn when handling

broken glass.

Handling broken glass must be done with extreme caution. Failure

to do so may result in serious injury.

E. Draining the Collector

If maintaining the system, or in preparation for extremely cold

conditions (extended snow cover), draining of the manifold may be

required. To drain the collector of fresh water (open loop, direct ow

system):

1. Turn o the water supply to the solar storage tank.

2. If the storage tank or other system components are being

concurrently drained, refer to their instruction manuals for details. If

storage tank is not being drained, isolate piping to and from the solar

collector (isolation valves should already be installed). Immediately

open drain valves on both lines (or undo ttings). Never leave the

isolation valves in the o position while the collector is full of water

and exposed to sunlight. The water will heat and cause a pressure

increase which may rupture ttings/connections.

NOTE: In good weather the water may be hot or have built up pressure,

so take care when opening the drain valve.

Draining the collector must be done with caution, as released

water may be scalding hot. Take care when opening the drain

valve. Failure to do so could result in property damage,serious

injury, or death.

F. Other Components

Other parts of the system, such as the pump and storage tank,

should be serviced/inspected according to the manufacturer’s

maintenance guidelines.

G. Stagnation

Drain back systems - These systems may be stagnated.

Pressure glycol systems -If left unattended for a signicant length

of time (greater than 14 days) such as during a vacation, the system

will need a heat dump, a cover for the collector array, or to be

drained to prevent stagnation damage. Many solar controllers have

a vacation mode that allows for dumping the daily collected heat

each night. See controller instructions.

Part 9 - Troubleshooting

Inspection items marked with an (H) may be completed by the

homeowner, but only if investigation is clearly SAFE and EASY. Any

information obtained during an investigation can then be relayed

to the company that supplied and installed the system. Any other

system troubleshooting, adjustments, or repairs may be completed

ONLY by authorized persons.

A. No Hot Water

If there is no hot water, the problem will generally be related to the

gas or electric heating system, not the solar collector. The collector

simply pre-heats water, with nal boosting completed by the electric

element or gas booster system. For a retrotted solar system, please

contact the manufacturer/installer of your gas/electric water heater.

For a new solar water heating system, please contact the company

that supplied and installed the system.

B. Reduced Solar Contribution

Solar contribution is directly related to the amount of solar radiation

and the volume of hot water used. During the winter and periods

of rainy or particularly overcast weather, the amount of energy

produced by the solar collector will be greatly reduced.

As a general rule, the solar collector is sized to provide close to 100%

of your summer hot water needs, which, depending on your location

and hot water usage patterns, may result in between 40% - 70% of

your annual hot water energy needs. During the winter, increased

cloud cover and reduced solar radiation levels may result in solar

contribution as low as 20%. This is normal.

If, given similar environmental conditions, you feel the solar

contribution (as indicated by energy savings) has considerably

reduced, there may be a problem with your solar heating system.

This may be due to an incorrectly congured controller, pump

malfunction, or problem with the boosting system. In such cases,

please contact the company who supplied and installed the system.

INVESTIGATION

(H) 1. Does the circulation pump appear to be operating? In sunny

weather, the circulation pump should come on for 1 – 2 minutes

every 3 – 5 minutes. The pump may run very quietly. You may need

to touch the pump, or piping running to and from the pump, with a

solid object to feel for motor operation (slight vibration). NOTE: DO

NOT USE FINGERS! THE PUMP MAY BE HOT!

3. Allow the manifold to sit in a vented state for 5 – 10 min to boil dry

(may take longer in poor weather).

4. Always leave one drain valve or tting open. Otherwise the system

may build up pressure when it heats. For draining of other types of

systems, please refer to specic instructions for the system.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

(H) 2. Are all the evacuated tubes intact? If a tube has been damaged or discolored it will reduce system performance and should be replaced.

If a tube is damaged, do not attempt to remove it. Contact the company who supplied and installed the system.

(H) 3. Are there any apparent leaks in the plumbing to and from the collector? Any water trails down the roof, or around the storage tank?

During normal daily hot water use, if the temperature relief valve on the tank or collector is regularly dumping hot water (more than just a

dribble), there may be a problem with the system.

POSSIBLE CAUSES

1. The system has been sized incorrectly (oversized). This will be most apparent in the summer months, when solar radiation levels are high.

2. A problem exists with the electric heating thermostat (electric boosting only).

3. Check expansion tank size. If undersized, water expansion may cause the relief valve to activate.

INVESTIGATION

(H) To test the system, run the hot water tap in the bathroom or kitchen for 5 minutes to release some heat from the system (CAUTION: THE

WATER WILL BE HOT. BE CAREFUL.) After this period, if the tank or collector still regularly dumps hot water, there is a problem. Please contact

the company who supplied and installed the system to organize a service call.

C. Regular Water Dumping

Part 10 - Installation Checklist

The following list is a guide only. Specic items will depend on the nature of the installation.

Item Ye s No

Collector faces due North/South as closely as possible

Collector is not signicantly shaded throughout the day.

Collector is not likely to be struck by falling objects such as branches or falling fruit.

Collector is installed at an angle of 20-80o, preferably at a latitude angle.

Collector is installed at an angle of 40oor greater in areas prone to large hail (>3/4”).

Frame is secured to structurally sound roof/wall.

Plumbing is leak free.

Plumbing pipe runs are well insulated.

Insulation above roof level is protected against sunlight with foil wrap or equivalent.

Controller is congured correctly with freeze setting (if required).

System is tted with pressure relief valve on the collector outlet and/or storage tank.

Pressure relief valve will dump only onto high temperature resistant material and will not pose a danger of scalding people.

Pump, controller, and all electrical connections are protected from water.

Evacuated tubes have been cleaned.

Installation record form has been given to customer and basic operation explained.

Functional checks for controller and pump have been completed.

Water quality has been checked.

Collector loop piping has been ushed and cleaned.

Table 6 - Installation Checklist - All Items Should be Checked“Yes” for Installation to be Considered Completed Satisfactorily

lp-220 Rev. 000 Rel. 007 Date 2.12.18

Evacuated Tube Solar Collector

Ten (10) Year Limited Warranty

For Residential and Commercial Use

HTP warrants each evacuated tube solar collector to be free from

defects in materials and workmanship according to the following

terms, conditions, and time periods. UNLESS OTHERWISE NOTED

THESE WARRANTIES COMMENCE ON THE DATE OF INSTALLATION.

This limited warranty is available to the original consumer purchaser

(hereinafter “Owner”) of the solar collector, and is transferable to

any subsequent owners of the solar collector for a total of ten (10)

years. This limited warranty extends to solar collectors installed for

use in medium temperature range applications (110 to 210oF ONLY).

This warranty covers the evacuated tube solar collector and its

components ONLY.

COVERAGE

A. Should a defect or malfunction result in a leakage of water

or degradation of the collector absorber surface in such a way as

to signicantly aect collector performance within the above-

stated warranty periods due to defective material or workmanship,

malfunction, or failure to comply with the above warranty, with

such defect or malfunction having been veried by an authorized

HTP representative, HTP will repair or replace the defective or

malfunctioning solar collector with a replacement solar collector of

the nearest compatible model available at the time of replacement.

Replacement parts or collectors shall be warranted for the remainder

of the original warranty.

B. In the event of a failure of a replacement solar collector due

to defective material or workmanship, malfunction, or failure to

comply with the above warranty, HTP reserves the right to refund

to the Owner the published wholesale price available at the date of

manufacture of the original solar collector.

C. If government regulations, industry certication, or similar

standards require the replacement solar collector or component(s)

to have features not found in the defective solar collector or

component(s), the Owner will be charged the dierence in price

represented by those required features. If the Owner pays the price

dierence for those required features or other features available on

a new replacement solar collector or component(s), the Owner will

also receive a complete new limited warranty for that replacement

solar collector or component(s).

D. If at the time of a request for service the Owner cannot provide a

copy of the original sales receipt or the warranty card registration,

the warranty period for the solar collector shall then be ten (10) years

from the date of manufacture of the solar collector and NOT the date

of installation of the solar collector.

E. This warranty extends only to solar collectors utilized in heating

applications that have been properly installed by qualied

professionals based upon the manufacturer’s installation instructions.

F. It is expressly agreed between HTP and the Owner that repair,

replacement, or refund are the exclusive remedies of the Owner.

G. HTP will not accept claims from the Owner for labor costs incurred

by any person as a result of the repair, replacement, removal, or

reinstallation of a solar collector or any component thereof.

OWNER RESPONSIBILITIES

The Owner or Installer must:

1. Operate the solar collector in a solar water heating system installed

in accordance with federal, state, and local codes.

2. Operate the solar water heating system at pressures below that

shown on the solar collector rating label.

3. Keep the solar collector free of damaging scale deposits.

4. Make provisions so if the solar collector or any component part or

connection thereto should leak, the resulting ow of water will not

cause damage to the area in which it is installed.

5. Maintain the solar collector in accordance with the maintenance

procedure listed in the manufacturer’s provided instructions.

6. Maintain all related system components in good operating

condition.

7. Use the solar collector in an open system, or in a closed system

with a properly sized and installed thermal expansion tank.

WARRANTY EXCLUSIONS

This limited warranty will not cover:

1. Any solar collector purchased from an unauthorized dealer or

online retailer.

2. Any solar collector not installed by a qualied heating installer/

service technician, or installations that do not conform to ANSI,

CSA, and/or UL standards, as well as any applicable national or local

building codes.

3. Service trips to teach you how to install, use, maintain, or to bring

the solar collector installation into compliance with local building

codes and regulations.

4. Failure to locate the solar collector in an area where leakage of the

tank or water line connections and the relief valve will not result in

damage to the area adjacent to the solar collector or lower oors of

the structure.

5. Any failed components of the solar water heating system not

manufactured by HTP as part of the solar collector.

6. Solar collectors repaired or altered without the prior written

approval of HTP.

7. Damages, malfunctions, or failures resulting from improper

installation, or failure to install the solar collector in accordance

with applicable building codes/ordinances or good plumbing and

electrical trade practices; or failure to operate and maintain the

solar collector in accordance with the manufacturer’s provided

instructions.

8. Damages, malfunctions, or failures resulting from failure to operate

the solar collector at pressures not exceeding the working pressure

shown on the rating label.

9. Failure to operate the solar collector in an open system, or in a

closed system with a properly sized and installed thermal expansion

tank.

10. Failure or performance problems caused by improper sizing of

the solar collector, expansion device, or piping.

11. Damages, malfunctions, or failures caused by operating the solar

collector with modied, altered, or unapproved parts.

12. Damages, malfunctions, or failures caused by abuse, accident,

re, ood, freeze, lightning, acts of God and the like.

13. Failures (leaks) caused by operating the solar collector in a

corrosive or contaminated atmosphere.

14. Failure of the solar collector due to the accumulation of solid

materials and lime deposits.

15. Any damage or failure resulting from improper water chemistry.

WATER CHEMISTRY REQUIREMENTS – Water pH between 6.5 and 8.5.

Hardness less than 7 grains (120 mg/L). Chloride concentration less

than 100 ppm (mg/L). TDS less than 500 ppm (mg/L).

16. Any damages, malfunctions, or failures resulting from the use of

dielectric unions.

17. Production of noise, odors, discoloration, or rusty water.

18. Solar collectors replaced for cosmetic reasons.

19. Components of the solar collector that are not defective, but must

be replaced during the warranty period as a result of reasonable

wear and tear.

20. Damages, malfunctions, or failures resulting from the use of any

attachment(s) not supplied by HTP.

21. Solar collectors installed outside the fty states (and the District

of Columbia) of the United States of America and Canada.

22. Solar collectors moved from the original installation location.

23. Solar collectors that have had their rating labels removed.

24. Solar collectors with broken glass.

25. Solar collectors installed as a roof membrane or integral part of an

existing roof membrane.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

26. When installed in a system using a glycol based heat transfer

liquid and the solar collector is left exposed to daily sunlight without

hot water usage or eective heat dissipation, such that the collector

dry stagnates, with the exception of stagnation due to system

component failure or power outage, where the system failure is

remedied within forty eight (48) hours of occurring, and;

27. Solar collector(s) left dry (no liquid circulation) and exposed to

daily sunlight (not covered) for a period of time exceeding fourteen

(14) consecutive days.

28. Any labor charges incurred by any person in connection with the

examination or replacement of a solar collector or parts claimed by

the Owner to be defective.

PROCEDURES FOR WARRANTY SERVICE REQUESTS

Any claim for warranty assistance must be made immediately upon

nding the issue. First, please consult the HTP Warranty Wizard

(http://www.htproducts.com/Warranty-Wizard.html) to check

warranty eligibility. You may also contact HTP Technical Support

at 1-800-323-9651 for questions or assistance. Warranty coverage

requires review and approval of the issue with HTP Technical Support

or through the Warranty Wizard prior to a full unit replacement. Any

claim for warranty reimbursement will be rejected if prior approval

from HTP is not obtained in advance of a full unit replacement. Final

determination will be made as part of the warranty claim process.

When submitting a warranty claim the following items are

required:

1. Proof of purchase or installation of the product – Typically a

copy of the invoice from the installing contractor, the receipt of the

purchase of the product, or an original certicate of occupancy for

a new home.

2. Clear pictures (or video) of the following:

a. Serial number tag (sticker)

b. The product

c. The product issue / failure whenever possible

d. A picture of the piping near the product

e. For gas red products, a picture of the venting, including how

it exits the building

All claims will be reviewed by HTP within three (3) business days. If

additional information is required and requested by the HTP Claims

Department you will have thirty (30) days to provide it. When all

requested information is provided HTP will respond within three (3)

business days. The claim will be automatically closed if requested

information is not provided within thirty (30) days. Claims will not be

reopened without HTP Warranty Supervisor approval.

During the claims process a product that must be replaced will be

given a designation of either a) eld scrap, or b) return to HTP. If the

product must be returned to HTP, the returned product must arrive

at HTP within thirty (30) days of the date of our request to return the

product. After receipt of the returned product HTP may require as

many as thirty (30) additional days for product testing. NOTE: Any

components or heaters returned to HTP for warranty analysis

will become the property of HTP and will not be returned, even

if credit is denied.

If you have questions about the coverage of this warranty, please

contact HTP at the following address or phone number: HTP, 272

Duchaine Blvd., New Bedford, MA, 02745, Attention:Warranty Service

Department, 1(800) 323-9651.

SERVICE, LABOR AND SHIPPING COSTS

This limited warranty does not extend to any shipping charges,

delivery expenses, or administrative fees incurred by the Owner

in repairing or replacing the solar collector or component(s). This

warranty does not extend to any labor costs incurred by any person

as a result of the repair, replacement, removal, or reinstallation of a

solar collector or any component thereof. All such expenses are the

Owner’s responsibility.

LIMITATIONS OF YOUR HTP WARRANTY AND REMEDIES

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN

AND ACCEPTED TO THE FURTHEST EXTENT UNDER APPLICABLE

LAW IN LIEU OF ANY AND ALL OTHER WARRANTIES, EXPRESS

OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE AND ANY OBLIGATION, LIABILITY, RIGHT,

CLAIM OR REMEDY IN CONTRACT OR TORT, WHETHER OR NOT

ARISING FROM HTP’S NEGLIGENCE, ACTUAL OR IMPUTED. THE

REMEDIESOFTHEOWNERSHALLBELIMITEDTOTHOSEPROVIDED

HEREINTOTHE EXCLUSION OF ANY OTHER REMEDIES INCLUDING

WITHOUT LIMITATION, INCIDENTAL OR CONSEQUENTIAL

DAMAGES, SAID INCIDENTAL AND CONSEQUENTIAL DAMAGES

INCLUDING, BUT NOT LIMITED TO, PROPERTY DAMAGE, LOST

PROFIT OR DAMAGES ALLEGED TO HAVE BEEN CAUSED BY

ANY FAILURE OF HTP TO MEET ANY OBLIGATION UNDER THIS

AGREEMENT INCLUDING THE OBLIGATION TO REPAIR AND

REPLACE SET FORTH ABOVE. NO AGREEMENT VARYING OR

EXTENDING THE FOREGOING WARRANTIES, REMEDIES OR THIS

LIMITATION WILL BE BINDING UPON HTP. UNLESS IN WRITING

AND SIGNED BY A DULY AUTHORIZED OFFICER OF HTP. THE

WARRANTIES STATED HEREIN ARE NOT TRANSFERABLE AND

SHALL BE FOR THE BENEFIT OF THE OWNER ONLY.

NO OTHER WARRANTIES

This warranty gives you specic legal rights, and you may also have

other rights that vary from state to state. Some states do not allow

the exclusion or limitation of incidental or consequential damages so

this limitation or exclusion may not apply to you.

These are the only written warranties applicable to the solar

collector manufactured and sold by HTP. HTP neither assumes nor

authorizes anyone to assume for it any other obligation or liability

in connection with said solar collectors. HTP reserves the right to

change specications or discontinue models without notice.

lp-220 Rev. 000 Rel. 007 Date 2.12.18

IMPORTANT

Customer: Please only sign after the installer has fully reviewed the installation, safety, proper operation, and maintenance of the system. If

the system has any problems please call the installer. If you are unable to make contact, please call your sales representative.

Distributor / Dealer: Please insert contact details.

Customer Installation Record Form

The following form should be completed by the installer for you to keep as a record of the installation in case of a warranty claim. After

reading the important notes at the bottom of the page, please also sign this document.

Customer’s Name

Date of Installation

Installation Address

Product Name / Serial Number(s)

Comments

Installer’s Code / Name

Installers Phone Number

Signed by Installer

Signed by Customer

Installation Notes

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