FAFCO 500 Series User manual

500 Series
Closed Loop
Solar Hot Water System
Installation Manual
Made in the U.S.A.
Note: This manual provides a detailed, step-by-step procedure for installing the Solar
Water-Heating System. The directions should be followed properly, and only recommended
components and hardware should be used. This will ensure a trouble-free system that will
maintain the warranty while providing solar energy and savings.
FAFCO © 2010

Introduction ..........................................1
Safety .................................................. 2
Code and Certication Requirements.. 3
Parts List..............................................4
Optional Kits ........................................5
Tools Required.....................................5
Overview..............................................6
Installation Checklist .......................... 13
1: Site Selection and Planning ........ 14
2: Roof Mounting ............................. 15
3: Tank Plumbing ............................17
4: ICM Installation ........................... 20
Table of Contents
Introduction
The Solar Water Heating System is designed to provide a signicant portion of the water-heating energy required in a
typical home. Solar energy is absorbed by the solar collectors, and heated water is circulated through the water heater.
Heated water is drawn from the water heater by various household xtures and appliances, such as a clothes washer,
dishwasher, bath, shower, and other xtures.
System performance is affected by available solar energy, the solar collectors’ installed pitch and orientation,
groundwater and ambient air temperatures, and the daily household hot water demand comprised of bath, kitchen,
and laundry use. These conditions, which may vary from home to home even in the same neighborhood, determine
how much energy your solar system will save.
1
5: Tubing & Sensor
Installation - Below Roof ............. 20
6: Tubing & Sensor
Installation - On Roof .................. 21
7: System Fill ..................................22
8: System Start-up .......................... 22
9: System Operation ....................... 24
10: Troubleshooting .......................... 25
Maintenance ...................................... 25
Specications .................................... 26
Required Labels.................................27
Optional Kit Instructions..................... 28

2
Dangerous Heights
Solar collector(s) are often installed on the roof of a building. Unless you’re familiar with working on roofs and
have the proper ladders and safety equipment for such work, you should hire someone with the necessary
experience to do the installation. Failure to observe safe practices on a roof or other elevated structures may
result in falling and serious injury. Working alone increases the chance of an accident happening. Be sure to
have help or someone nearby to assist you.
High Voltage
Some aspects of installation involve working around and with high voltage. Electrical connections to the hot water
heater (if electric) are typically 240 VAC and CAN KILL YOU. Use precautions and ensure that all electricity is
shut off to the area in which you’re working. Use the breaker box and remove the breaker if you have to. Check
with a voltmeter to verify the voltage is off before contacting any electrical connections. Consult with a licensed
electrician if you have any doubts about the process. Check your local building codes.
High Water Pressure and Temperature
Electric and gas water heaters operate at high water pressure and temperature. Be sure to turn off your water
supply and open drain valves to depressurize the system before unthreading or cutting into any part of the water
heater plumbing. Consult a licensed plumber if you have any doubts. Check your local building codes.
Hot water is dangerous. Water temperature to the home
can be regulated by adjusting the temperature control
valve. The recommended set point is 120° F. There is
a scald potential if the temperature control valve is set
too high.
Hot water can produce rst degree burns within:
• 120° F (49°C) more than 5 minutes
• 130° F (54°C) at 20 seconds
• 140° F (60°C) at 3 seconds
• 150° F (66°C) at 1-1/2 seconds
• 160° F (71°C) at less than 1 second
! WARNING !
WATER TEMPERATURE REGULATION
Safety
Page 21 of this manual contains instructions to mix a minimum 35% FAFCO HTF with potable water. Use of any other
heat-transfer uid will void warranty, and may result in poor performance and/or equipment damage. This mixture is suf-
cient for any freezing conditions per Section 21.5 of the ASHRAE Handbook, Fundamentals which states, “If the uid is
being used to prevent equipment damage during idle periods in cold weather, such as winterizing coils in an HVAC system,
35% propylene glycol is sufcient. These concentrations will allow the uid to freeze. As the uid freezes, it forms a slush
that expands and ows into any available space. Expansion volume must be included with this type of protection. If the
application requires that the uid remain entirely liquid, use a concentration with a freezing point 5oF below the lowest ex-
pected temperature. Avoid excessive glycol concentration because it increases initial cost and adversely affects the uid’s
physical properties.” Freeze protection is conservatively estimated down to -20oF. Freeze tolerance limits are based
upon an assumed set of environmental conditions. MSDS is available at www.fafco.com for information on disposal
and First Aid. FAFCO system is overheat protected and has little metal in contact with uid. It therefore does not promote
deposits, corrosion, or degradation of uid mixture.
HEAT TRANSFER FLUID AND FREEZE PROTECTION

Code requirements
Refer to the local authority having jurisdiction, such as the local building department or utility, to ensure all installation work meets applicable require-
ments. Use the FAFCO permit package, available for download at www.fafco.com, to submit to the local authority having jurisdiction for permitting.
All installation work should be performed by a properly licensed contractor. Backup water heater and/or storage tank must be listed and labeled by
an accredited listing organization, meet national standards, be labeled with maximum temperature and pressure, and have minimum R-12 insulation.
Do not remove, bypass, or alter temperature pressure relief valve from backup water heater and/or storage tank.
Certication requirements
Refer to the local authority having jurisdiction and incentive providers for certication requirements.
FAFCO solar collectors and systems listed in Specications, page 25, are certied by the Solar Rating and Certication Corporation (SRCC), a
nationally recognized certication for solar water heating collectors and systems. The solar energy system described in this manual, when properly
installed and maintained, meets the minimum standards established by SRCC. This certication does not imply endorsement or warranty of this
product by SRCC. Specic minimum SRCC installation requirements are listed below:
1. Building penetrations do not impair enclosure function.
2. Building penetrations do not allow insect or vermin intrusion.
3. Building penetrations meet applicable codes and National Roong Contractors Assoc. practices.
4. Structural members penetrated by solar system components meet code.
5. Building materials adjacent to solar components are not exposed to elevated temperatures.
6. Collector mounting is capable of maintaining tilt and azimuth.
7. No excessive shading of collectors.
8. Hangers provide correct tube support.
9. Hangers provide correct tube pitch.
10. Hangers do not compress insulation.
11. Control sensors and wiring are protected.
12. Penetrations through re-rated assemblies do not reduce re resistance below code.
SRCC model numbers
Up to date model numbers can be found at SRCC’s website, www.solar-rating.org.
OG-100:
- 2’X12’ COLLECTOR: SRCC MODEL 2007030A AND 2’X8’ COLLECTOR: SRCC MODEL 2007030B
OG-300:
3
Code and Certication Requirements
Power Supply
* All brand and product names appearing in this manual are registered trademarks of their respective companies.
Expected operating conditions
Temperature
Pressure
Flowrate
MEASUREMENT SYSTEM ACCESS POINT EXPECTED VALUE
Controller display
Expansion reservior
Solar or Potable Loop
DT greater than 10oF when operating
Less than 1 psi
1 to 2 gpm
Solar
Collector
Area
(sq-ft)
Solar
Tank
Volume
(gal)
2’x12’ Collectors 2’x8’ Collectors
Electric Water Heater Gas Water Heater Electric Water Heater Gas Water Heater
Dual Tank Single Tank Dual Tank On-Demand Dual Tank Single Tank Dual Tank On-Demand
A/C
48 50 AC24UX2-50E-50S AC24UX2-50E AC24UX2-50G-50S AC24UX2-TG-50S AC16UX3-50E-50S AC16UX3-50E AC16UX3-50G-50S AC16UX3-TG-50S
48 80 AC24UX2-50E-80S AC24UX2-80E AC24UX2-50G-80S AC24UX2-TG-80S AC16UX3-50E-80S AC16UX3-80E AC16UX3-50G-80S AC16UX3-TG-80S
48 120 - AC24UX2-120E - AC24UX2-TG-120S - AC16UX3-120E - AC16UX3-TG-120S
96 50 AC24UX4-50E-50S AC24UX4-50E AC24UX4-50G-50S AC24UX4-TG-50S AC16UX6-50E-50S AC16UX6-50E AC16UX6-50G-50S AC16UX6-TG-50S
96 80 AC24UX4-50E-80S AC24UX4-80E AC24UX4-50G-80S AC24UX4-TG-80S AC16UX6-50E-80S AC16UX6-80E AC16UX6-50G-80S AC16UX6-TG-80S
96 120 - AC24UX4-120E - AC24UX4-TG-120S - AC16UX6-120E - AC16UX6-TG-120S
144 50 AC24UX6-50E-50S AC24UX6-50E AC24UX6-50G-50S AC24UX6-TG-50S AC16UX9-50E-50S AC16UX9-50E AC16UX9-50G-50S AC16UX9-TG-50S
144 80 AC24UX6-50E-80S AC24UX6-80E AC24UX6-50G-80S AC24UX6-TG-80S AC24UX6-50E-80S AC16UX9-80E AC16UX9-50G-80S AC16UX9-TG-80S
144 120 - AC24UX6-120E - AC24UX6-TG-120S - AC16UX9-120E - AC16UX9-TG-120S
PV
48 50 PV24UX2-50E-50S PV24UX2-50E PV24UX2-50G-50S PV24UX2-TG-50S PV16UX3-50E-50S PV16UX3-50E PV16UX3-50G-50S PV16UX3-TG-50S
48 80 PV24UX2-50E-80S PV24UX2-80E PV24UX2-50G-80S PV24UX2-TG-80S PV16UX3-50E-80S PV16UX3-80E PV16UX3-50G-80S PV16UX3-TG-80S
48 120 - PV24UX2-120E - PV24UX2-TG-120S - PV16UX3-120E - PV16UX3-TG-120S
96 50 PV24UX4-50E-50S PV24UX4-50E PV24UX4-50G-50S PV24UX4-TG-50S PV16UX6-50E-50S PV16UX6-50E PV16UX6-50G-50S PV16UX6-TG-50S
96 80 PV24UX4-50E-80S PV24UX4-80E PV24UX4-50G-80S PV24UX4-TG-80S PV16UX6-50E-80S PV16UX6-80E PV16UX6-50G-80S PV16UX6-TG-80S
96 120 - PV24UX4-120E - PV24UX4-TG-120S - PV16UX6-120E - PV16UX6-TG-120S
144 50 PV24UX6-50E-50S PV24UX6-50E PV24UX6-50G-50S PV24UX6-TG-50S PV24UX6-50E-50S PV16UX9-50E PV16UX9-50G-50S PV16UX9-TG-50S
144 80 PV24UX6-50E-80S PV24UX6-80E PV24UX6-50G-80S PV24UX6-TG-80S PV24UX6-50E-80S PV16UX9-80E PV16UX9-50G-80S PV16UX9-TG-80S
144 120 - PV24UX6-120E - PV24UX6-TG-120S - PV16UX9-120E - PV16UX9-TG-120S

4
Power Supply
18*
28*
24*
4*
Roof Kit: Two 2’ x 12’ Collectors PN 08881 or Three 2’ x 8’ Collectors PN 08911
Mounting bases
PN 06918
13
13
2
Mounting caps
PN 06919
Roof jack
PN 08211
Roof sealant,
10 oz. tube
PN 08229
Mounting Strap,
40’ roll, PN 08907 1
1
20
Collet clips
PN 08819
Roof Sensor
PN 08380
Wire connector
PN 08359
1
20
1
2
Roof sensor
sleeve PN 08910
Panel plug
PN 08837
Support liner
PN 08520 1
Elbow ttings
PN 08441 6
22
Reservoir Fender
washer, PN 08884
2
Rubber grommet
Roof Jack, PN 08190
Collector connectors
3-1/2” L, PN 08883
18*
* Quantities in upper left denote 2’x12’ collectors and lower right denote 2’x8’ collectors
Parts list
COMPONENT QTY.
BRAND
- Differential controller
Solar collector (2’x8’) or
Expansion reservoir
3
1
Integrated Circulation Module (ICM)
1
Heat Transfer Fluid 3 gallons
1
08890
MODEL
FAFCO
FAFCO
Solar collector (2’x12’) 08840
08790
FAFCO
- Pump
08783
FAFCO
- Heat exchanger 08782
FAFCO
08795
FAFCO
1
PV Panel Kit (For PV System Only) 08844
FAFCO
08897
FAFCO
08797
FAFCO
A.O. Smith or
equivalent
Conservationist,
Promax Plus, or
equivalent
Solar Storage tank (not provided)
Image
2
1
1
2
1
08845
FAFCO
- PV Panel
Ground Kit PN 08882
Teon tape roll
PN 07581
1
Fill and drain
valves PN 08836
Flexible hoses
3’ - PN 08834
5’ - PN 08835
Plastic tubing,
80 ft. PN 08613
Tube support
clips PN 08609
2
1
EA
20
Tee, brass, 3/4”
PN 08872
2
Reducer, brass,
3/4” x 1/2”
PN 08862
Check valve,
PN 09003
Nipple, brass, hex,
3/4” PN 08869
2
1
1
Elbow, swivel
PN 08305
Filter, self-clean
PN 08833
Power Supply
PN 08784
Screw, self
tapping, 2-1/2”
PN 08830
1
1
3
1
1Cable ties
PN 08184 4
Sensor
PN 08380
2Nipple, brass,
3/4” x 3”
PN 08863
1
Escutcheon
PN 08462
2
Sensor cable,
50’ PN 08208
1
12
Support liner
PN 08520
12
Collet clips
PN 08819

5
Parts list (Continued)
Tools Required
Channel lock pliers
Two or more ladders
Wire cutters
Cordless power drill
Wire strippers
Hammer
3/4” & 1-1/4” paddle bit
Caulking gun
1/4” drill bit
Tape measure
5/16” & 7/16” socket driver
Stud nder
#2 & #3 Phillips screw driver
Level
3/4” masonry bit (For tile roof)
3/4” male thread tap
Adjustable wrench
Tubing cutter
Safety glasses
1/8” at blade screw driver
Optional Kits
Coltector Lag
screw, stainless
steel, 1/4” x 2”
18
Reservoir Lag
screw, stainless
steel, 1/4” x 3-1/2”
2
Roong nails, 1” 8
Parts NOT Provided
Pipe Insulation,
R-2.6 min, 3/4”
thick min
Tube Insulation,
R-2.6 min, 3/4”
thick min, 5/8” ID
-
-
Tube Insulation
Support
-
Information Kit
1
1
1
2
Installation Manual - PN 08905
Cold Water Valve Position Label - PN 08371
Freeze Protection And Fluid Safety Label - PN 08904
Label attachment zip-ties - PN 08307
Collector Add-On Kit
Tile Roof Installation Kit (TRIK)
Solar Storage Tank Kit (Low lead)
Temperature Control Valve Kit (Low lead)
Coaxial Tank Adapter Conversion Kit
Electric Fill Kit
Tubing Extension Kit, 80 ft.
Tube Repair Kit
Kit Name Kit Number Description
758 (Two 2’x12’) or 759 (Three 2’x8’)
767 (Two 2’x12’) or 769 (Three 2’x8’)
730-1
733
776
777
734
162-1
48 square feet of collectors with 1 gallon HTF. See pg. 33
Anchors and supports collectors on tile roofs. See pg. 36
Connects water heater to solar storage tank, See pg. 19
Valve required by code. See pg. 18
Enables both connections at tank drainport. See pg. 34
Pumps HTF into system. See pg. 22
80 foot of additional tubing for long runs
Rubber plugs for repairing solar collector tubes

6
There are three basic solar water heating system congurations:
• Dual-tank gas or electric
• Single-tank electric
• Single-tank with on-demand gas heater
Components vary based on conguration. Refer to the schematics on the following pages for further details.
Two 2’ x 12’ Solar Collectors
Dual-Tank Single-Tank Single-tank
with
on-demand Heater
Three 2’ x 8’ Solar Collectors
Overview

7
Overview (continued)
DUAL TANK SYSTEM
Solar-heated water in the solar storage tank preheats the water to the electric or gas water heater. A solar storage tank
connection kit (PN 730-1) is available from your supplier to connect the solar storage tank to the electric or gas water
heater.
Temperature
control valve
Water heater
Storage Tank
Integrated
Circulation Module
(ICM)
Bypass
valves
Expansion
reservoir
Self Cleaning Filter
From solar collectors
To solar collectors
Cold water supply
Fill valve
Cold water
shut-off valve
Temperature
Control Valve
Bypass valves
Hot water to home
Drain valve
P/T Valve
Air Vent/Pressure
Relief Valve
Solar collectors
Check valve

8
Overview (continued)
SINGLE TANK SYSTEM
Solar-heated water is stored directly in an electric water heater with a single active upper element, rather than a
separate storage tank.
Electric water heater: An electric water heater can be either be one that is manufactured with only one element, or an electric water heater manufactured with two elements with the bottom element
disconnected. Single element electric water heaters replenish hot water slower than dual element water heaters. Refer to the local plumbing code for minimum water heater size requirements. Code
typically requires that water heaters be sized to meet a minimum “First Hour Rating” based on the number of bedrooms and bathrooms in a home. For single element water heaters that don’t have
published First Hour Ratings, GAMA/AHRI recommends using 0.75 times the water volume which would require that an 80 gallon tank be used in homes as large as 2 bedroom, 2 bath and that a
120 gallon tank be used in larger homes. It is also recommended to install low ow shower heads which can signicantly reduce hot water demand and save water. Raising the thermostat setting
on water heater element can also increase hot water capacity, but doing so may decrease realized energy savings.
Solar collectors
Water heater
Expansion
reservoir
Integrated
Circulation Module
(ICM)
Temperature
Control Valve
Air Vent/Pressure
Relief Valve
From solar collectors
To solar collectors
Hot water to home Cold water supply
Self
Cleaning
Filter
Cold water shut-off valve
Fill valve
Drain valve
P/T Valve
Temperature
Control Valve
Check Valve

9
Solar-heated water in the solar storage tank preheats the water to the gas on-demand water heater. A solar storage
tank connection kit (PN 730-1) is available from your supplier to connect the solar storage tank to the gas on-demand
water heater. For an on-demand water heater to properly work with a solar water heating system, it must have a
temperature-modulating gas burner. A temperature control valve is required for this conguration, but depending on
the brand and model of on-demand heater, the valve placement may vary. Refer to the manufacturer’s instructions for
compatibility with solar water heating systems and proper placement of the temperature control valve.
SYSTEM OVERVIEW
(ON-DEMAND FOR GAS OR ELECTRIC)
SINGLE TANK WITH ON-DEMAND HEATER
Overview (continued)
Temperature
control valve
Gas
On-demand
Heater
Integrated
Circulation Module
(ICM)
Expansion
reservoir
Bypass valves
Polymer Solar
Collector
Storage Tank
Air Vent/Pressure
Relief Valve
Fill valve
Drain valve
Gas
On-demand
Heater
Temperature
control valve
To solar collectors
From solar collectors
Cold
water
supply
Cold water
shut-off
valve
Hot water
to home
Bypass
valves
P/T valve
Self cleaning
lter
Check valve

10
Overview (continued)
DC Solar Loop Pump
(FAFCO P/N 08795)
DC Potable Loop Pump
(FAFCO P/N 08795)
DC Differential Temperature
Controller
(FAFCO P/N 08783)
Solar Loop Outlet
Solar Loop Inlet
Potable Loop Outlet
Potable Loop Inlet
Ground, PV, & Sensor Wire
Terminal Block
Temperature Display
Button
Brazed Plate Heat Exchanger
(inside, FAFCO P/N 08782)
Function: Controls the Solar Water Heating System; circulates the potable water and the so-
lar loop uid. The heat exchanger transfers the solar heat to the potable water.
Integrated Circulation Module (ICM)
(cover removed)
SYSTEM OVERVIEW
(ON-DEMAND FOR GAS OR ELECTRIC)
COMPONENT OVERVIEW
Black UV Resistant
Collector Sheet
Solar Collector
Black UV Resistant
Collector Header
Black UV Resistant
Push Fitting
Black UV Resistant
Collet Cover
DC Power Supply Jack
Water Temperature
Display
Solar Switch
Sensor Error Codes
Solar-On LIght
Max Water Temp
Switch
Function: Absorbs the energy from the sun to heat the solar loop uid. Push ttings allow
for quick, leak-free tubing connections sealed with internal rubber o-ring.

11
Retaining Ring
Expansion Reservoir
UV Resistant
Air Vent/Pressure
Relief Valve, 1 psi
Mounting Holes
Fluid Inlet or
Outlet
Fluid Inlet or Outlet
UV Resistant Bladder
Vent Cap
Internal Rubber
Air Bladder Black UV Resistant
Reservoir
Function: Installed at the highest point of the system, it serves as expansion tank, air vent and pressure
relief valve. It allows for thermal expansion/contraction of the uid without increasing pressure/vacuum
in the system. The air in the internal bladder inates and deates freely through the bladder vent cap.
When initially lled, the bladder fully deates and air is purged through the air vent/pressure relief
valve. When not in operation, the cool uid thermally contracts and the bladder inates to accomodate
the reduction in uid volume. During operation, the heated uid thermally expands and the bladder de-
ates to allow for the increase in uid volume. On the hottest day at maximum uid thermal expansion,
the bladder will be fully deated and any excess uid will expel through the one-way air vent/pressure
relief valve. After this happens, all uid expansion/contraction will be handled by the bladder.
SYSTEM OVERVIEW
(ON-DEMAND FOR GAS OR ELECTRIC)
COMPONENT OVERVIEW
Overview (continued)
Self-Cleaning Filter
Function: Cold water to ICM is connected to the storage tank using a tee with internal lter. During
normal operation, cold water is drawn into the ICM from the water heater’s cold water inlet or cold water
supply during hot water use. Whenever hot water is used in the home, fresh cold water back ushes
lter putting any buildup back into the water heater. The self-cleaning feature prevents debris, sediment
or scale build-up from reducing system performance and potentially damaging the circulation pump.
Reducer and lter can be removed for cleaning if necessary.
20 Mesh
Filter Screen
Water Heater’s Cold Water Inlet
Cold Water Supply
Cold Water to ICM
Tee
Dielectric
Nipple
Reducer
Nipple

12
Plastic Tubing
• Provided FAFCO tubing is weather resistant.
• PEX (Cross-Linked Polyethylene) tubing approved
for use with push ttings may be used, but must not
be exposed to sunlight.
• Plastic tubing will expand and contract at different
temperatures.
• Tubing should be supported at a minimum of 36” to
prevent excessive load to the connectors.
• Do not install tubing supports closer than 3” from the
connector ends.
• The tube edges must be smooth and free of rough
edges and burrs before inserting into push ttings.
Push Fittings Assembly
Overview (continued)
Figure 3 - Tube Installation
Tube Stop
FAILURE TO PROPERLY CONNECT FITTINGS CAN RESULT IN LEAKS.
Tube Stop
Figure 1 - Tubing Cutter
Cut the tubing to length using a tubing cutter. Inspect
the outside diameter of the tubing. It must be free of
damage, smooth, and clean. (See Figure 1.) Measure
the insertion depth on the tubing end. Push ttings
have an insertion depth line molded onto the outside of
the connector bodies. Make certain to push the tubing
Figure 2 - Insertion Depth
completely into the tting until it comes into contact with
the internal tubing stop. (See Figure 2.) To disconnect,
ensure the system is depressurized before removing
ttings. Fittings are reusable and easy to connect and
disconnect. Push the collet in squarely against the face
of the tting. With the collet held in this position, the
tubing can be removed.
Tube Installation
• A support liner and collet clip must be used on
every tube tting to prevent tube disengagement.
(See Figure 3.)
Push Fittings Cannot be Exposed to the
Following Chemicals:
• Pipe dopes (e.g., liquid thread sealant), leak-check
compounds, bug sprays, lubricants, cleaners,
paints, bleaches, acids, solder uxes, plastic
piping primers and cements, oxidizing agents,
alkaline solutions, thinners, fuels, oil-based caulk,
hydrocarbons, spray foam, or foaming agents
Collet Clip
(open)
Support Liner
Collet Clip
(closed)
Tubing and Fittings
SYSTEM OVERVIEW
(ON-DEMAND FOR GAS OR ELECTRIC)
COMPONENT OVERVIEW
Caution: Galvanized piping and ttings are not
compatible with heat transfer uid and cannot
be used in collector loop plumbing.

13
Installation Checklist
10-STEP INSTALLATION PROCESS
1: SITE SELECTION AND PLANNING
2: ROOF MOUNTING
3: TANK PLUMBING
4: ICM INSTALLATION
5: TUBING & SENSOR INSTALLATION—BELOW ROOF
6: TUBING & SENSOR INSTALLATION—ROOF
7: SYSTEM FILL
8: SYSTEM START-UP
9: SYSTEM OPERATION
10: TROUBLESHOOTING

14
1: Site Selection and Planning
It’s important to choose the best roof loca-
tion to install the solar collectors, based on the
considerations below:
Roof Direction
For homes in the northern hemisphere, the best
installation site is a roof facing true south. (See Figure 4.)
If a south-facing roof isn’t available, then choose a site
based on the following:
• Second choice, a roof facing between southeast and
southwest
• Third choice, a roof facing West or East
Distance From Water Heater
The solar collectors should be as close as possible to
the water heater. The closer the collectors are to the
water heater, the shorter the tubing run will be. The
maximum allowable vertical height of the collectors
from the ICM is 50’. The maximum required tubing
length each way to the solar collectors is 100’. The
Solar Water Heating System comes with 80’ of tubing.
Additional tubing may be ordered from your dealer.
Mounting Methods by Roof Type
The following are recommendations for mounting to vari-
ous roof types. Consult a roong professional regarding
the correct method for installing solar panels on a roof.
Inspect the condition of the roof. Contact a roong pro-
fessional to determine the remaining life of the roof be-
fore recommended replacement.
Important: The solar collectors are exible and must be installed
on a smooth, at surface. Any uneven or very rough roof surface
will require a at support surface underneath the solar collectors.
Composition asphalt
This is a common roof type, and solar collectors can be
mounted directly to the roof. Refer to the instructions on
the following pages detailing mounting on composition
asphalt. (See Figure 5.)
Shake
A substrate must be used on shake roofs. Mount solar collec-
tors directly on top of the substrate. Lay substrate on roof
and proceed with the standard mounting procedures on
the following pages. UV resistant, dark color, 2’ wide by
8’ or 12’ long, corrugated (wavy) sheet with ribs no more
than 2˝ apart and 1˝ high, berglass or polycarbonate
Figure 4 - Roof Direction
Shading from trees or other buildings should be
avoided between 10am to 3pm. Keep in mind that as
the seasons change, the sun changes its trajectory in
the sky. The sun appears higher during the summer
months and lower in the southern sky during winter
months. Areas that are clear in the summer may be
shaded by tree and shrub growth in the winter.
Roof Size
Collectors must be mounted vertically, perpendicular
to the shingle rows, as shown in Figure 5.
• One set of (3) 2’ x 8’ solar collectors will need a clear
roof area measuring at least 7.5’ wide x 9’ tall.
• One set of (2) 2’ x 12’ solar collectors will need a
clear roof area measuring at least 5.5’ wide x 13’ tall.
Figure 5 - Composition Asphalt Roof

15
sheets are available from a FAFCO distributor or local
home improvement store.
Tile
A Tile Roof Installation Kit (TRIK) should be used on tile roofs.
TRIK is available from your supplier. The kit includes
specialized tile roof mounting hardware, substrate, and
complete installation instructions. (See Figure 6.)
Metal roofs
A substrate with structural rack must be used on metal
roofs. UV resistant, dark color, 2’ wide by 8’ or 12’ long,
corrugated (wavy) sheet with ribs no more than 2˝ apart
and 1˝ high, berglass or polycarbonate sheets are avail-
able from a FAFCO distributor or local home improve-
ment store. Standing seam roofs have commercially
available clips, referred to as “S5 clips,” to fasten to the
seams . These can be purchased through S5 distribu-
tors. Alternatively, drive lag screws through the roof to a
truss and use roof sealant at the penetration to ensure
a good seal in a manner acceptable to the metal roof
manufacturer. Fasten down stringers and substrate to
support the collectors.
Other roof types (e.g., membrane, foam,
tar-and-gravel, slate):
For any roong material not covered here, check with a
roong contractor for the best method to attach the solar
collectors.
1: Site Selection and Planning (Continued)
Figure 6 - Tile Roof With TRIK
2: Roof Mounting
STEP 1: UNROLL SOLAR COLLECTORS
Carry the rolled up solar collectors onto the roof. Carry ad-
ditional collectors onto the roof if using a collector add-on kit.
Do not drag solar collectors over a surface that could dam-
age them. Unroll the collectors over the ridge of the roof al-
lowing them to relax and atten out. On windy days, be care-
ful during this step! Hold the collectors down if necessary.
STEP 2: REMOVE PROTECTIVE COVERS AND CONNECT COLLECTORS
Remove protective caps and discard. Connect the collectors
together with the provided 3-1/2” connectors, using support
liners, and collet clips.

16
2: Roof Mounting (Continued)
STEP 3: CHOOSE MOUNTING LOCATION AND LAYOUT
Collectors must be installed vertically, side-by-side, allowing at least 10
inches above the top headers for mounting of the reservoir and upper
roof jack. Place the collectors, reservoir, and upper roof jack in chosen
location as shown. Reservoir must be centered above outlet collec-
tor header. Bottom of reservoir must be at least 2 to 6 inches above
collector header as shown. Roof jack installs black side up, with hole
located near the bottom edge of a shingle. The reservoir rubber grom-
met must be higher than the roof jack rubber grommet. Mark the four
collector corners with chalk and temporarily move the collectors out of
the way.
STEP 4: MOUNT RESERVOIR
Mark locations of the two expansion reservoir mounting screws and apply
two quarter-sized dabs of roof sealant. Mount the reservoir with two stain-
less steel 3-1/2” lag screws (not provided) and two stainless steel fender
washers (provided). Snug down, but do not over tighten.
Note: Penetrations of the building through which piping or wiring is
passed shall not reduce or impair the function of the enclosure. Penetra-
tions through walls or other surfaces shall not allow intrusion by insects
and/or vermin. Required roof penetrations shall be made in accordance
with applicable codes and also by practices recommended by the Na-
tional Roong Contractors Association.
STEP 5: INSTALL UPPER ROOF JACK
Note: If installing a PV Panel, see Appendix on page 28 before proceeding
with this step. Chalk mark the location of the upper roof jack hole. Break
the glue line between the shingles by sliding a large putty knife between
the shingles. Loosen just enough to t the roof jack underneath. Insert
rubber grommet into roof jack from underside and slide roof jack into place
to check the t and the chalk mark. At the mark, drill a 1-1/4” roof penetra-
tion. Attach the provided wire connector to the roof sensor lead wire and
feed the lead through the hole. Leave enough lead for the sensor to reach
4” beyond the outlet end of the collector. Lift shingle and apply a large
bead of roof sealant completely around the hole and the lead wire. Slide
roof jack into place under the shingle, with lead wire protruding out under
lower edge of jack. Press down into sealant to ensure a good seal. Secure
roof jack using galvanized roong nails (not provided). Be careful not to
put nails through the roof sensor wire. Apply roof sealant to the nail heads.
Apply roof sealant under the overlapping shingle and press at.
STEP 6: INSTALL COLLECTOR HEADER STRAPS
Replace the collectors in the chalk marked location. String the sensor
lead wire underneath the collectors with the sensor protruding at upper
collector outlet end. Apply a quarter-sized dab of roof sealant 3” above
the end of one of the top headers. Place mounting base over sealant
and drive a 2” lag screw (not provided) through the base, securing so
that strap can run vertically through the slot. Wrap a short header strap
around header and lay into the slot in the base. Screw on a cap until
tight. Be careful not to cross thread. Continue with the installation of
remaining header straps at both ends of each header.

STEP 2: SHUT OFF WATER SUPPLY
STEP 1: TURN OFF WATER HEATER
Note: Install a new water heater at this point if the existing water heater will not be used.
Follow the water heater manufacturer’s installation instructions. A drip pan with a drain
line to the outside of the building is required whenever water storage tanks are located
above living space.
For electric water heaters: turn off the circuit breaker and verify with a volt meter at the top of the water heater.
Shut the cold water inlet valve to the water heater. This is usually a ball or gate valve located near the top of the water
heater. Shut off water to the home at the main water shutoff.
STEP 3: CONNECT HOSE TO DRAIN BIBB
Connect a garden hose to the drain connection at the bottom of your water heater. Make sure discharge end of
the hose is in a safe place for hot water to ow. Open the drain bibb.
STEP 4: OPEN PRESSURE-RELIEF VALVE
As water heater is draining, open the pressure-relief valve on the side or top of the heater. When heater is empty,
remove hose, close drain bibb and relief valve.
17
STEP 7: INSTALL BODY STRAPS
Apply roof sealant at lag screw location, 1” from collector edge, 4” down
from the top header. Drive a lag screw through the base.
Orient the slot for the strap horizontally and tighten lag screw. Lay the
strap in the slot of the base and screw down the cap until tight. Install base
on opposite side of the three panels 1” from the collector edge. Stretch
strap across panels and screw down with cap until tight. Install another
base and cap between panels. Measure to center of collectors and install
a center body strap following previous procedure. Install the third collector
body strap 4” above the bottom header. Straps will allow for expansion
and contraction of the solar collectors.
STEP 8: INSTALL LOWER ROOF JACK
At the lower header end, diagonally opposite the upper outlet header end,
install the lower inlet header roof jack 4-6 inches out from the header, as de-
tailed in Steps 5 & 6 above. Note: This jack does not get a sensor.
2: Roof Mounting (Continued)
3: Tank Plumbing - Single Tank

18
STEP 1: DISCONNECT WATER HEATER PIPING
3: Tank Plumbing—Single Tank
Disconnect the water heater hoses. Replace if needed. Check that the water heater has dielectric nipples.
STEP 2: CONNECT TEMPERATURE CONTROL VALVE
Apply thread sealant and connect temperature control valve to the water heater port labeled “H” for hot. Connect
a exible hose to the temperature control valve port labeled “MIX” and connect the other end to the hot water pipe
to the house.
STEP 3: INSTALL SELF CLEANING FILTER TEE
Apply thread sealant and install 3/4” tee in the upright position onto the water heater port labeled “C” for cold.
Insert the screen lter, open end rst, into the 3/4” x 1/2” reducer. Apply thread sealant to reducer, and install into
the side of 3/4” tee as shown.
STEP 4: CONNECT 3/4” TEE
Apply thread sealant and using a 3/4” nipple, connect another 3/4” tee in the upright position above the rst tee. Con-
nect upper tee to cold water valve and temperature control valve port labeled “C” using exible hoses and nipples as
shown.
STEP 5: INSULATE PIPES AND ATTACH LABEL
All interconnecting hot water piping and the nal 5 feet of cold water supply pipe shall be insulated with R-2.6 or
greater insulation. Attach provided Cold Water Shut-Off Valve label to the cold water shut off valve.
STEP 6: REPLACE HEATER VENT (GAS ONLY)
Replace heater vent and vent cap.
Compression
sleeve
Compression
nut
Connector
body
Copper
tubing
Flexible connector
for water lines
Copper Pipe Adaptor
Single Tank Plumbing
Hot Water
To Home
Cold Water
Supply

19
Note: A Solar Storage Tank Add-On Kit can be used for this installation conguration.
This kit is available through your distributor. The tank is plumbed as shown.
3: Tank Plumbing—Dual Tank
STEP 1: RE-DIRECT WATER SUPPLY
Re-direct the cold water supply line from the water heater cold inlet, to the tee above the temperature control
valve as shown. Use one of the new exible hoses unless you prefer to use the existing hose. When attaching
to the cold water supply line, connect directly to threads. If no threads are present use the provided adapter,
3/4” compression X 3/4” MPT. For 1” copper tubing, purchase a 1” compression adapter.
STEP 2: INSTALL SELF CLEANING FILTER TEE AND BYPASS VALVES
Apply thread sealant and install 3/4” tee in the upright position onto the storage tank port labeled “C” for cold.
Insert the screen lter, open end rst, into the 3/4” x 1/2” reducer. Apply thread sealant to reducer, and install into
the side of 3/4” tee as shown. Assemble the other 4 provided exible hoses, remaining ttings and bypass valves
as shown. Important: Before turning on the electricity or gas supply, be certain that the tank is full of water. Do
not use thread sealant on exible hose connections.
STEP 3: FILL TANK & ACTIVATE ELECTRICAL/GAS SUPPLY
With the system in normal operating position, and a hot water faucet still open, turn the cold water shut off valve
on to allow water to enter the tanks. The open hot water faucet will permit air to be purged from the tank. Close
the faucet when the water becomes a constant ow and all air is purged. Inspect for leaks and tighten connec-
tions where necessary. Reconnect and activate electrical or gas supply. Open or close the isolation valves as
shown to switch between normal operating position and bypass position. All interconnecting hot water piping and
the nal 5 feet of cold water supply pipe shall be insulated with R-2.6 or greater insulation. Attach provided valve
position label to the cold water shut off valve. Attach Storage Tank Bypass label to one of the 2-way valves. Attach
Cold Water Shut-Off Valve label to cold water shut-off valve.
Normal Operating Position
Bypass Position
Bypass Valves
Dielectric
Nipples
Temperature
Control Valve
Hot Water
To Home
H
HC
C
Cold Water
Supply
Cold Water Shut-Off Valve
Adapters (if necessary)
Self-Cleaning Filter
Storage Tank
Water Heater
Bypass Valves