Htp Elu-85wbn Installation manual

ELU

High Eciency Condensing

Wall-Hung Gas Boilers

DANGER

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.

NOTICE

The manufacturer reserves the right to make product changes or updates without notice and will not be held liable for

typographical errors in literature.

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

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

LP-700 Rev. 000 Rel. 002 Date 4.21.21

WARNING

Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause property

damage, severe personal injury, or death.

California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer, birth

defects, or other reproductive harm.

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.

Heat Exchanger Bears the ASME “H”Stamp

420000510904

Installation

Start-Up

Maintenance

ELU-85WBN

ELU-120WBN

ELU-120WCN

ELU-150WCN models

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

WARNING

WARNING: If the information in these instructions is not followed exactly, a re or explosion may result causing property damage, personal

injury or death.

• Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the re department.

• Installation and service must be provided by a qualied installer, service agency or the gas supplier.

Improper installation, adjustment, alteration, service, or maintenance can cause injury, property damage, or death. Refer to this

manual. Installation and service must be performed by a qualied installer, service agency, or gas supplier.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

SPECIAL ATTENTION BOXES

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

DANGER indicates an imminently hazardous situation which, if not

avoided, will result in serious personal injury or death.

WARNING

WARNING indicates a potentially hazardous situation which, if not

avoided, could result in personal injury or death.

CAUTION

CAUTION indicates a potentially hazardous situation which, if not

avoided, may result in moderate or minor personal injury.

CAUTION

CAUTION used without the safety alert symbol indicates a

potentially hazardous situation which, if not avoided, may result

in property damage.

NOTICE

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 boiler. This includes all related control

information. It is important that this manual, all other documents

included in this system, and additional publications including the

National Fuel Gas Code - ANSI Z223.1 in the United States and the

Natural Gas and Propane Installation Code - B149.1 in Canada (latest

versions), be reviewed in their entirety before beginning any work.

For the Installer

This boiler must be installed by qualied and licensed personnel.

The installer should be guided by the instructions furnished with the

boiler, and by local codes and utility company requirements. In the

absence of local codes, preference should be given to the National

Fuel Gas Code - ANSI Z223.1 in the United States and the Natural Gas

and Propane Installation Code - B149.1 in Canada (latest versions).

Installations Must Comply With:

Local, state, provincial, and national codes, laws, regulations, and

ordinances.

In the United States - The latest version of the National Fuel Gas Code,

ANSI Z223.1, from American Gas Association Laboratories, 8501 East

Pleasant Valley Road, Cleveland, OH 44131.

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

In Canada - The latest versions of the Natural Gas and Propane

Installation Code, CSA B149.1, and the Canadian Electrical Code, C22.1,

from CSA Group, 178 Rexdale Blvd, Toronto, Ontario, Canada M9W

1R3.

NOTE: The gas manifold and controls met safe lighting and other

performance criteria when undergoing tests specied in ANSI Z21.13

- latest edition.

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 AHJ may be a federal, state,

provincial, 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 or

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

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

NOTE: The manufacturer reserves the right to modify product

technical specications and components without prior notice.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

Table of Contents

Part 1 - General Safety Information 5

A. Operation and Installation Warnings 5

B. Improper Combustion 6

C. Gas 6

D. When Servicing the Boiler 6

E. Boiler System 7

F. CH and DHW Loop Water Chemistry Requirements 7

G. Freeze Protection 7

H. Water Temperature Adjustment and Scalding 8

I. High Elevation Installations 8

Part 2 - Before You Start 9

A. What’s in the Box 9

B. Optional Equipment 11

Part 3 - Prepare the Boiler for Installation 11

A. Locating the Boiler 11

B. Leveling 12

C. Clearances for Service Access 12

D. Wall Mounting Considerations 13

E. Wall Mounting Instructions 13

1. Mounting to a concrete wall 13

2. Mounting to a Wood Studded Wall 14

F. Residential Garage and Closet Installations 15

G. Exhaust Vent and Intake Pipe 15

1. Direct Vent of Exhaust and Intake 15

2. Power Venting, Indoor Combustion Air in Conned or

Unconned Space 15

H. Carbon Monoxide Detectors 15

I. Prevent Combustion Air Contamination 16

J. Removing a Boiler from a Common Vent System 16

K. Technical Specications 17

Part 4 - Water Piping 22

A. General Plumbing Information 22

B. Backow Preventer 22

C. Expansion Tank 22

D. Piping the Boiler 22

E. Internal Circulation Pump 24

F. By-Pass Valve 24

G. CH and DHW Pressure Relief Valves 24

H. Air Elimination Device 26

I. Low Water Cut-O (Field Supplied) 26

J. Applications* 26

K. Floor Drying Function 33

Part 5 - Venting 34

A. General 34

B. Approved Materials for Exhaust Vent and Intake Pipe 35

C. Additional Requirements for Installation in Canada 35

D. Exhaust Vent and Intake Pipe Location 36

E. Exhaust Vent and Intake Pipe Sizing 37

F. Tightening Boiler Collar to Exhaust Vent and Intake Pipe 37

G. Exhaust Vent and Intake Pipe Installation 38

H. Applications 40

1. Direct Vent Installation of Exhaust and Intake 40

2. Venting Through an Existing System 46

3. Power Venting, Indoor Combustion Air in Conned or Unconned

Space 47

NOTICE

WARNING

The hydronic supply and return connections of these products

are for installation in closed loop systems ONLY! Use of this

product in any manner other than described in this manual may

result in premature product failure, substantial property damage,

severe personal injury, or death. Damage or failure of this product

(or the system in which it is installed) due to unauthorized use IS

NOT COVERED BY WARRANTY.

IMPORTANT

In accordance with Section 325 (f) (3) of the Energy Policy and

Conservation Act, HTP has provided this boiler with multiple

features designed to save energy by reducing the boiler water

temperature as heating load decreases.

These features include:

• A modulating combustion system that adjusts ring

rate based on heat demand.

• Adjustment of boiler set point based on inferred heat

load as determined by an outdoor sensor. The outdoor

sensor is supplied with this boiler.

• This boiler does not include a standing pilot.

• This boiler is designed and shipped to assure the highest

eciency operation possible. Such high eciency is

achieved by limiting heating circuit water temperature

to 140°F when there is no anticipated heat load, based

upon the outdoor sensor and the Outdoor Reset Curve

(sensor response curve) in the boiler software.

• This feature may be over-ridden as described below in

specic installations:

• The boiler control is equipped with an outdoor sensor

override for use with building management systems

or in cascaded systems (for systems with total input of

300,000 BTU/hr or greater).

See statement below for an important notice on the use of the

override.

IMPORTANT

In accordance with Section 325 (f) (3) of the Energy Policy

and Conservation Act, this boiler is equipped with a feature

that saves energy by reducing the boiler water temperature

as the heating load decreases. This feature is equipped with

an override which is provided primarily to permit the use of

an external energy management system that serves the same

function. THIS OVERRIDE MUST NOT BE USED UNLESS AT

LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE:

• An external energy management system is installed that

reduces the boiler water temperature as the heating

load decreases.

• This boiler is not used for space heating.

• This boiler is part of a modular or multiple boiler system

having a total input of 300,000 BTU/hr or greater.

ASME CSD-1, Section CW-400 requires the temperature controls of

hot water heating boilers to

a) be accepted by a nationally recognized testing agency to

conform to UL 353,

b) shuto the fuel supply when the system water reaches a preset

operating temperature,

c) have a high temperature limit control that prevents the

water temperature from exceeding the maximum allowable

temperature by causing safety shutdown and lockout.

The temperature controls of this boiler have been accepted by a

nationally recognized testing agency to conform to UL 353; they

work to shuto the fuel supply when the system water temperature

reaches the preset operating temperature; and they cause a safety

shutdown and lockout, requiring a manual reset to start, when the

water temperature reaches 212°F.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

Part 1 - General Safety Information

Thisboileris approvedforindoorinstallationsonlyandisnotintended

for use as a pool heater. Clearance to combustible materials: 0” top,

bottom, sides, and back. Boiler must have room for service: 18” front,

14” top, 12” bottom, 2” left and right sides and 0” back are minimum

recommended service clearances. (A combustible door or removable

panel is acceptable front clearance. A 3” minimum clearance must

be provided from the boiler front cover to the removable panel

or combustible door.) This boiler has been approved for closet

installation and installation on combustible ooring. Do not install

directly on carpeting. Install the boiler in a location where relief valve

discharge or a leak will not result in damage to the surrounding area.

If such a location is not available install an auxiliary catch pan.

This appliance is rated Category IV (pressurized vent, likely to form

condensate in the vent) and requires a special vent system designed

for pressurized venting. Use only Category IV vent systems.

WARNING

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 service technician.

Have this boiler serviced / inspected annually by a qualied service

technician.

FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE

CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE

PERSONAL INJURY, OR DEATH.

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

installing the boiler.

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

that does not reduce the performance of any re rated assembly.

A. Operation and Installation Warnings

To avoid serious injury or death, read, understand, and follow all of

the precautions listed here.

DANGER

Vapors from ammable liquids will explode and cause a re,

resulting in personal injury or death. The boiler has a burner that

can come on at any time and ignite vapors. DO NOT use or store

ammable liquids around the boiler.

Improper venting can cause a build-up of carbon monoxide.

Breathing carbon monoxide can result in brain damage or death.

DO NOT operate the boiler unless it is properly vented to the

outside and has an adequate fresh air supply for safe operation.

Inspect the exterior exhaust gas outlet port and fresh air inlet port

on a regular basis to ensure they are functioning properly.

A concentration of carbon monoxide as small as .04% (400 parts

per million) in the air can be fatal. When making high re or low

re adjustments, CO levels must be monitored using a calibrated

combustion analyzer such that a CO level of no more than 150 ppm

is exceeded at any time during operation.

Part 6 - Installing the Condensate Drain 48

Part 7 - Connecting Electrical Service 50

A. Wiring 50

1. Removing the Power Cord (To Hard Wire the Boiler) 50

2. Connecting Power (120V) for DHW and CH Circulators 51

3. Low Voltage Wiring Connections 51

4. Room Thermostat Wiring Connections 52

5. Outdoor Sensor Connections 52

6. Aquastat (Default) and Tank Sensor (Optional) Connections (non-

Combi Models) 52

B. Internal Wiring Details 53

Part 8 - Gas Connections 57

A. Gas Pipe Sizing Tables 57

1. Gas Pipe Sizing 57

2. Natural Gas Pipe Sizing 57

3. LP (Liquid Propane) Gas Pipe Sizing 57

B. Gas Connection Requirements 57

C. Additional Precaution for Excess Flow Valve (EFV) 58

D. Checking Gas Pressure at the Boiler for Proper Operation 58

Part 9 - Controls 59

A. Control and Display Overview 59

B. Ignition Procedure 60

C. Central Heating (CH) Temperature Adjustment 60

D. Domestic Hot Water (DHW) Temperature Adjustment 60

E. Automatic CH Temperature Control (AUTO) 61

F. Type of Temperature Control 62

G. Slope of Outdoor Reset Curve 62

H. Parallel Shift of Reset Curve 63

I. Auto Boost 63

I. Technical Menu - Access and Navigation 64

K. Technical Menu - Menu Structure 65

L. Technical Menu - Complete Menu 66

Part 10 - Start-Up Preparation 73

A. Check / Control Water Chemistry 73

B. Check for Gas Leaks 73

C. Freeze Protection (When Used) 73

D. System Water Fill, Purge, and Test 74

E. Purge Air from DHW System 74

F. Check Thermostat Circuit(s) 74

G. Condensate Removal 74

Part 11 - Start-Up 75

A. First Ignition 75

B. Combustion Checking Procedure 76

C. Checking Combustion Parameters 78

D. Converting the Appliance from Natural Gas to Propane

Operation 78

Part 12 - Installation Checklist 79

Part 13 - Troubleshooting 80

A. Boiler Protection Devices 80

1. Blocking Error 80

2. Lockout Error 80

3. Malfunction Warning 80

B. Boiler Error Codes 81

Part 14 - Maintenance 85

A. Procedures 85

B. Maintenance That May be Performed by the User 85

C. Maintenance Only to be Performed by a Qualied Service

Technician 86

D. Replacing Components 90

E. After Maintenance is Complete 93

Part 15 - Maintenance Report 93

Part 16 - Shutdown 95

A. Shutdown Procedure 95

B. Failure to Operate 95

C. Important 95

Part 17 - Maintenance Notes 96

Customer Installation Record Form 100

Adjusting the “low re oset” or the “main ow restrictor” in small

increments can result in a signicant increase in CO concentration.

To avoid serious injury or death, DO NOT make any adjustments

to the gas valve without monitoring the exhaust gases with a fully

functional and calibrated combustion analyzer.

Failure to follow these instructions will result in property damage,

severe personal injury, or death.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

NOTE: If the boiler is exposed to re or water (or is any way

damaged), do not operate. Immediately call a qualied service

technician. Failure to follow this information could result in

property damage, severe personal injury, or death.

DO NOT USE THIS BOILER IF ANY PART HAS BEEN SUBMERGED

IN WATER. Immediately call a qualied service technician. The

boiler MUST BE replaced if it has been submerged. Attempting to

operate a boiler that has been submerged could create numerous

harmful conditions, such as a potential gas leakage causing a re

and/or explosion, or the release of mold, bacteria, or other harmful

particulates into the air. Operating a previously submerged boiler

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

NOTE: Boiler damage due to ood or submersion is considered an

Act of God, and IS NOT covered under product warranty.

DO NOT alter or modify the appliance or appliance controls.

Altering any HTP boiler with parts not manufactured by HTP WILL

INSTANTLY VOID the boiler warranty and could result in property

damage, personal injury, or death.

WARNING

This boiler must be installed by a qualied service technician.

Improper installation and/or operation can cause a potentially

hazardous situation, which if not avoided will void the warranty

and could result in serious injury or death.

The manufacturer cannot anticipate every circumstance that might

involve a potential hazard. Each installation has its own specialized

characteristics, requirements, and possible hazards. Therefore, all

possible incidents are not included in these warnings. Proper and

safe installation, operation, and service are the responsibility of the

qualied service technician.

Proper care of the boiler is the user’s responsibility. Ensure the user

carefully reads and understands the User’s Information Manual

before operating the boiler.

Make sure the user knows the location of the gas shut-o valve and

how to operate it. Immediately close the gas shut-o valve if the

appliance is subjected to re, overheating, ood, physical damage,

or any other damaging condition that might aect the operation

of the unit. Have the appliance checked by a qualied service

technician before resuming operation.

Do not power up the unit unless the gas and water supply valves

are fully opened. Make sure the fresh air intake port and exhaust

gas port are open and functional.

No one but a qualied service technician should attempt to install,

service, or repair this boiler. There are no serviceable parts which

can be changed by the user / owner.

User / Owner: Contact the original qualied service technician if

the boiler needs repair / maintenance. If the original technician

is unavailable, ask your gas supplier for a list of qualied service

providers.

DO NOT store or place newspapers, laundry, or other combustible

items near the appliance or the exterior exhaust gas outlet and/or

fresh air inlet port.

The owner should inspect the system monthly for damage, water

stains, signs of rust, corrosion, and exhaust vent and air intake

blockage. If inspection of the unit shows signs of damage, the

boiler should be shut o until the problem is repaired by a qualied

technician.

After installation, all appliance safety devices should be tested.

The boiler is certied for indoor installations only. The boiler consists

of gas ignition system components which must be protected from

water (dripping, spraying, etc.) during operation and service.

Carefully consider installation location and the placement of

critical components (circulators, condensate neutralizers, etc.)

before installing the boiler.

DO NOT allow children to operate this boiler. DO NOT use this

boiler if it does not appear to be operating correctly. A qualied

service technician should service and inspect the boiler annually.

This appliance is equipped with a three prong plug. It should

only be plugged directly into a properly grounded three prong

receptacle. DO NOT remove the ground plug from the plug.

NOTICE

WARNING

This appliance provides an overheat shutdown limit. In the

event the appliance water temperature exceeds the setpoint of

the control limit, the cuto will trip and the appliance will shut

down. Certain local codes require additional temperature limits.

In addition, certain types of systems may operate at temperatures

below the minimum setpoint of the limit provided with the

appliance. Contact the manufacturer for additional overheat

controls.

Do not use this boiler for anything other than its intended purpose

(as described in this manual). Doing so could result in property

damage and WILL VOID product warranty.

CAUTION

B. Improper Combustion

WARNING

Do not obstruct the ow of combustion and ventilating air.

Adequate air is necessary for safe operation. Failure to keep the

exhaust vent and combustion air intake clear of ice, snow, or other

debris could result in property damage, serious personal injury, or

death.

C. Gas

Should overheating occur or gas supply fail to shut o, turn o the

manual gas control valve to the boiler.

D. When Servicing the Boiler

• To avoid electric shock, disconnect electrical supply before

performing maintenance.

• To avoid severe burns, allow boiler and associated equipment

to cool before servicing.

WARNING

Be sure to disconnect electrical power before opening boiler

cabinet or performing service. Label all wires while performing

service to ensure proper re-wiring of the appliance. Wiring errors

can cause improper or dangerous operation. Failure to do so could

result in electrical shock, improper boiler or system operation,

property damage, serious personal injury, or death.

Due to the low water content of the boiler, improper sizing of the

boiler with regard to heating system load will result in excessive

cycling and accelerated component failure. DO NOT under or

oversize the boiler to the system. Modular boiler installations

greatly reduce the likelihood of boiler oversizing. HTP DOES NOT

warrant failures caused by improperly sized boiler applications.

High heat sources (sources generating heat 100oF / 37oC or greater,

such as stove pipes, space heaters, etc.) may damage plastic

components of the boiler as well as plastic vent pipe materials.

Such damages ARE NOT covered by warranty. It is recommended

to keep a minimum clearance of 8”from high heat sources. Observe

heat source manufacturer instructions, as well as local, state,

provincial, and national codes, laws, regulations and ordinances

when installing this boiler and related components near high heat

sources.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

E. Boiler System

• Thoroughly ush the system (without the boiler connected)

to remove sediment. The high-eciency heat exchanger can

be damaged by build-up or corrosion due to sediment. The

manufacturer recommends a suction strainer in this type of

system.

• Do not use petroleum-based cleaning or sealing compounds

in boiler system. Gaskets and seals in the system may be

damaged, possibly resulting in substantial property damage.

• Do not use “homemade cures” or “boiler patent medicines”.

Substantial property damage, damage to the boiler, and/or

serious personal injury may result.

• Continual fresh make-up water will reduce boiler life.

Mineral buildup in the heat exchanger reduces heat transfer,

overheats the stainless steel heat exchanger, and causes

failure. Addition of oxygen from make-up water can cause

internal corrosion in system components. Leaks in the boiler

or piping must be repaired at once.

NOTE: DO NOT add cold make up water to the system when the

boiler is hot. Thermal shock can potentially cause cracks in the heat

exchanger. Such damage IS NOT covered by warranty.

• Do not use petroleum-based cleaning or sealing compounds

in boiler system. Gaskets and seals in the system may be

damaged, possibly resulting in substantial property damage.

• Do not use “homemade cures” or “boiler patent medicines”.

Substantial property damage, damage to boiler, and/or

serious personal injury may result.

• Always verify proper operation after servicing the boiler.

NOTE: When inquiring about service or troubleshooting, reference

the model and serial numbers from the boiler rating label.

F. CH and DHW Loop Water Chemistry Requirements

The water must be potable, free of corrosive chemicals, sand,

dirt, and other contaminates. It is up to the installer to ensure the

water does not contain corrosive chemicals or elements that can

damage the heat exchanger. Potable water is dened as drinkable

water supplied from utility or well water in compliance with EPA

secondary maximum contaminant levels (40 CFR Part 143.3). If

the water contains contaminants higher than outlined by the EPA,

water treatment is recommended and additional, more frequent

maintenance may be required. See Table 1.

If you suspect that your water is contaminated in any way, discontinue

use of the appliance and contact an authorized technician or licensed

professional.

CH Loop Total Water Hardness Specications

Contaminant Maximum Allowable Level

Total Hardness 120 mg/l

(7 grains/gallon)

DHW Loop Total Water Hardness Specications

Contaminant Maximum Allowable Level

Total Hardness

(Below 140oF water temperature)

200 mg/l

(12 grains/gallon)

Total Hardness

(Above 140oF water temperature)

120 mg/l

(7 grains/gallon)

CH and DHW Loop Water Quality Specications

Contaminant Maximum Allowable Level

Aluminum 0.05 to 0.2 mg/l or PPM

Chloride 100 mg/l or PPM

Copper 1 mg/l or PPM

Iron 0.3 mg/l or PPM

Manganese 0.05 mg/l or PPM

pH 6.5 - 8.5

Sulfate 205 mg/l or PPM

Total Dissolved Solids (TDS) 500 mg/l or PPM

Zinc 5 mg/l or PPM

Dissolved Carbon Dioxide (CO2) 15 mg/l or PPM

Table 1 - Water Quality Specications

CAUTION

Chemical imbalance of the water supply may aect eciency and

cause severe damage to the boiler and associated equipment.

Water quality must be professionally analyzed to determine

whether it is necessary to treat the water. Various solutions are

available to adjust water quality. Adverse water quality will aect

the reliability of the system. In addition, operating temperatures

above 135oF will accelerate the build-up of lime scale and possibly

shorten boiler service life. Failure of a boiler due to lime scale build-

up, low pH, or other chemical imbalance IS NOT covered by the

warranty.

G. Freeze Protection

WARNING

NEVER use any toxic chemical, including automotive, standard

glycol antifreeze, or ethylene glycol made for hydronic (non-

potable) systems. These chemicals can attack gaskets and seals in

water systems, are poisonous if consumed, and can cause personal

injury or death.

CAUTION

Consider piping and installation when determining boiler location.

Damages resulting from incorrect installation or from use of

products not approved by the manufacturer ARE NOT covered by

warranty. Failure of the boiler due to freeze related damage IS NOT

covered by product warranty.

NOTE: Loops Serving Indirect Water Heaters (IWHs)

Glycol used in IWH loops should be food grade propylene glycol,

FDA rated as “generally recognized as safe” (GRAS). If using a glycol /

potable water mix, the water chemistry must meet the requirements

in this manual. The glycol content of the liquid must not exceed 50%,

unless the manufacturer species a dierent ratio. Glycol should be

checked periodically to prevent it from becoming acidic. Please refer

to guidelines provided by the glycol manufacturer regarding glycol

maintenance.

NOTE: Glycol not recognized as GRAS may only be used in closed

loop CH applications.

NOTE: HTP DOES NOT WARRANT THE BOILER AGAINST FREEZE-

RELATED DAMAGE.

The boiler control is equipped with freeze protection that activates

based on internal water temperature. See the following table for

details on freeze protection operation.

NOTE: Freeze protection will not be active if the boiler loses power.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

I. High Elevation Installations

WARNING

Natural gas at high elevation might contain less heating value than

the typical 1,000 BTU/cu ft and therefore can cause an improper

air / gas mixture leading to improper combustion. For natural gas

installations above 3,000 ft, call your gas provider to determine the

heating value of the supplied natural gas.

H. Water Temperature Adjustment and Scalding

This boiler can deliver

scalding water. Be careful

whenever using hot

water to avoid scalding

injury. Certain appliances

such as dishwashers and

automatic clothes washers

may require increased

water temperatures. By

setting the thermostat

on this boiler to obtain

the increased water

temperature required by

these appliances you may

create the potential for

scald injury.

To protect against injury,

install a mixing valve in the

water system. This valve

will reduce point of use

discharge temperatures by

mixing cold and hot water

in branch supply lines.

Such valves are available

from your local plumbing

supplier.

Table 3 details the relationship of water temperature and time with

regard to scald injury and may be used as a guide in determining the

safest water temperature for your applications.

On ELU-085WBN / ELU-120WBN Models ONLY

If the boiler is to be used only in Heating Mode (not connected

to an indirect water heater), the electrical connection of the

3-way valve motor MUST BE DISCONNECTED while the boiler

is operating in central heating mode. This will lock the valve

motor in central heating mode and ensure freeze protection

operates properly. Failure to disconnect the valve may disable

boiler freeze protection and result in property damage.

Approximate Time / Temperature Relationships in Scalds

120oF More than 5 minutes

125oF 1 1/2 to 2 minutes

130oF About 30 seconds

135oF About 10 seconds

140oF Less than 5 seconds

145oF Less than 3 seconds

150oF About 1 1/2 seconds

155oF About 1 second

Table 3 - Time and Temperature Relationship in Scalds

Freeze Protection Operation

Stage 1

Condition Events Time

The water temperature

detected by probes NTC1

or NTC2 ranges between

F (4

C) and 46

F (8

C).

• The internal pump operates at high speed.

• The 3-Way Valve alternately switches positions - 1 minute on heating mode to

1 minute on DHW mode

• The display shows the icon.

Until the NTC1 and

NTC2 temperature

is greater than or

equal to 46°F (8°C)

If after 20 minutes the conditions described in Stage 1 are still present, the boiler proceeds to Stage 2.

Stage 2

Condition Events Time

The water temperature

detected by probes

NTC1 or NTC2 is less than

39oF (4oC).

• The burner turns on at minimum power.

• The 3-Way Valve is positioned on DHW and switches every 30 seconds

between CH and DHW.

• When the temperature is greater than or equal to 104oF (40oC) the burner will

turn o. The boiler will maintain the temperature between 95oF (35oC) and

104oF (40oC) for 45 minutes.

• After 45 minutes there will be 2 minutes of post heating circulation.

• If the temperature falls below 46oF (8oC) within 150 minutes the burner will

immediately power on again.

• The display shows the icon.

Until the NTC1

temperature is

greater than or

equal to 104oF

(40oC)

Table 2 - Freeze Protection Detail

CAUTION

Combustion - At elevations above 2000 ft, the combustion

of the boiler must be checked with a calibrated combustion

analyzer to ensure safe and reliable operation. It is the Installer’s

responsibility to check and adjust the combustion in

accordance with this manual. Failure to follow these instructions

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

This boiler is designed to operate at its maximum listed capacity in

installations located at 0 - 2000 ft above Sea Level. Since the density of air

decreases as elevation increases, maximum specied capacity should be

de-rated for elevations above 2000 ft (610 m) in accordance with the table

below.

Elevations

2001 ft

(610 m)

3000 ft

(914 m)

4000 ft

(1219 m)

4500 ft

(1372 m)

5000 ft

(1524 m)

In Canada1,

de-rate by:

10% 10% 10% 10%

may vary

In USA2,

de-rate by:

- 12% 16% 18% 20%

NOTES:

Canada: Elevations between 2000 - 4500 ft (610 - 1372 m),

de-rate by 10%. Consult local authorities for de-rating for elevations

above 4500 ft (1372 m).

USA: If elevation is above 2000 ft (610 m), de-rate capacity by 4% for

every 1000 ft (305 m).

Table 4 - De-Rate % for High Elevations

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

Components included with the boiler:

A. What’s in the Box

UNCRATING THE BOILER - Any claims for damage or shortage in

shipment must be led immediately against the transportation

company by the consignee.

NOTICE

Part 2 - Before You Start

Remove the boiler from the packaging. Remove the accessory box

from the boiler. Take care to place the boiler in a safe location prior

to installation to prevent damage to the mechanical connections.

Figure 1 - Included with the Boiler - part a

Table 5 - Included with the Boiler

TRX085

All models

THISCONTROL WAS CONVERTEDFOR USE WITH PROPANE GAS

Thisappliance has been converted for use with Propane Gas, in accordance with the

instructionsprovided with the Natural to Propane Conversion Kit

by______________________________________ , which accepts responsibility that

theconversion was performed properly.

Referencerating plate for PropaneInput and G as Pressure

420060882600

0 250

100 150

50 200

080

psi

TRX110C

15 16

Gas

15a

15f

15h

15i 16h

15b 15c

15d

15g

15e

16d

16a

16g

16e

16f

ACCESSORIESBOX

BOITE ACCESSOIRES

ForQualiﬁed Technician

InstallationInstruc tions

Pourtechnicien qualiﬁé

instructionsd’installation

Read the code

Lirele code

code

ACCESSORIESBOX

BOITE ACCESSOIRES

ForQualiﬁed Technician

InstallationInstruc tions

Pourtechnicien qualiﬁé

instructionsd’installation

Read the code

Lirele code

code

16b 16c

ELU

Wall-Hung Gas Boilers

Installation

Start-Up

Maintenance

Parts

Warranty

DANGER

stepsin the given order. Failureto do so could result in substantial property damage, severe personal injury, or death.

NOTICE

Themanufacturer reserves the right to make productchanges or updates without notice and will not be held liable for typographical errors

inliterature.

NOTETO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.

272Duchaine Blvd. NewBedford, MA 02745 www.htproducts.com

LP-700Rev. 000 Rel. 000 Date 4.17.19

WARNING

Improperinstallation, adjustment, alteration, service, or maintenance could void product warranty and cause property damage, severe

personalinjury, or death.

CaliforniaProposition 65 Warning:This product contains chemicals known tothe State of Californiato cause cancer,birth defects,orother

reproductiveharm.

Thesurfaces of these products contacted by potable (consumable) watercontain less than 0.25% lead by weightas required by the Safe

DrinkingWater Act, Section 1417.

HeatExchanger Bears the ASME “H” Stamp

TEMPLATE

QSG

ELU

Wall-Hung Gas Boilers

Installation

Start-Up

Maintenance

Parts

Warranty

DANGER

stepsin the given order. Failureto do so could result in substantial property damage, severe personal injury, or death.

NOTICE

Themanufacturer reserves the right to make productchanges or updates without notice and will not be held liable for typographical errors

inliterature.

NOTETO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.

272Duchaine Blvd. NewBedford, MA 02745 www.htproducts.com

LP-700Rev. 000 Rel. 000 Date 4.17.19

WARNING

Improperinstallation, adjustment, alteration, service, or maintenance could void product warranty and cause property damage, severe

personalinjury, or death.

CaliforniaProposition 65 Warning:This product contains chemicals known tothe State of Californiato cause cancer,birth defects,orother

reproductiveharm.

Thesurfaces of these products contacted by potable (consumable) watercontain less than 0.25% lead by weightas required by the Safe

DrinkingWater Act, Section 1417.

HeatExchanger Bears the ASME “H” Stamp

ELU

Wall-Hung Gas Boilers

Installation

Start-Up

Maintenance

Parts

Warranty

DANGER

stepsin the given order. Failureto do so could result in substantial property damage, severe personal injury, or death.

NOTICE

Themanufacturer reserves the right to make productchanges or updates without notice and will not be held liable for typographical errors

inliterature.

NOTETO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.

272Duchaine Blvd. NewBedford, MA 02745 www.htproducts.com

LP-700Rev. 000 Rel. 000 Date 4.17.19

WARNING

Improperinstallation, adjustment, alteration, service, or maintenance could void product warranty and cause property damage, severe

personalinjury, or death.

CaliforniaProposition 65 Warning:This product contains chemicals known tothe State of Californiato cause cancer,birth defects,orother

reproductiveharm.

Thesurfaces of these products contacted by potable (consumable) watercontain less than 0.25% lead by weightas required by the Safe

DrinkingWater Act, Section 1417.

HeatExchanger Bears the ASME “H” Stamp

ELU

High Eﬃciency Condensing

Wall-HungGas Boilers

Connectivity

QuickStar t Guide

ELUseries

272Duchaine Blvd.

NewBedford, MA 02745

www.htproducts.com

LP-700Rev.000 Rel. 000 Date 4.17.19

ELU

NATURALTO PROPANE

CONVERSIONINSTRUC TIONS

ForQualiﬁed Technician

InstallationInstructions

This conversion kit shall be installed by a qualiﬁed service

agency in accordance with the manufacturer’s instructions

and all applicable codes and requirements of the authority

having jurisdiction. If the information in these instructions

is not followed exactly, a ﬁre, an explosion or production

of carbon monoxide may result causing property damage,

personal injury or loss of life. The qualiﬁed service agency

is responsible for the proper installation of this kit. THE

INSTALLATIONIS NOT PROPER AND COMPLETE UNTIL THE

OPERATION OF THE CONVERTED APPLIANCE IS CHECKED

AS SPECIFIED IN THE MANUFACTURER’S INSTRUCTIONS

SUPPLIEDWITH THE KIT, WHICH NECESSITATESTHE USE OF A

CALIBRATEDCO2/O2AND CO COMBUSTION ANALYZER.

WARNING

272Duchaine Blvd.

NewBedford, MA 02745

www.htproducts.com

420020199000Rev. 000 Rel. 000 Date 6.24.19

Nr. Quantity Description

ALL MODELS

1 1 Condensing Gas Boiler

2 1 Condensate Drain Pipe

3 1 Bracket

4 2 Assembly Screws (Fischer Type SX )

5 1+1 CH Pressure Relief Valve + Connection Tube

6 1 2”CPVC Pipe, 5.5” Long

7 1 Piping Bracket

8 1 Torx screw adapter

9 2 + 2 2”Vent Screen + 3”Vent Screen

10 1 Tridicator

1+4+2

Closing bracket + screws + L-shaped brackets

12 1 Outdoor sensor Kit

13 1 LP Gas Conversion Kit

1 Installation Manual (This Document)

1 User’s Information Manual

1 Connectivity Quick Start Guide

1 LP Conversion Instructions

1 Warranty

1 Installation Quick Start Guide

1 Replacement parts manual

1 Template

15 1 Piping Adapter Kit - ELU-85WBN

15-a 1 + 1 Gas Adapter 3/4”+ 1 gas at

15-b 5 Gasket (2x1/2”+ 2x3/4” + 1 x 1” )

15-c 2 Cap 1/2”

15-d 4

Additional Gasket (1x1/2” + 1x3/4” + 1 x 1” + 1 gas at)

15-e 4 Clamp (2x3/4”+ 2x1”)

15-f 1 CH supply pipe 1”

15-g 1 Tank return pipe 3/4”

15-h 1 CH return pipe 1”

15-i 1 Accessory box components list

16 1 Piping Adapter Kit-ELU-120WCN

16-a 1 + 1 Gas Adapter 3/4”+ 1 gas at

16-b 5 Gasket (2x1/2”+ 2x3/4” + 1 x 1” )

16-c 4

Additional Gasket (1x1/2” + 1x3/4” + 1 x 1” + 1 gas at)

16-d 4 Clamp (2x3/4” + 2x1”)

16-e 1 CH supply pipe 1”

16-f 2 DHW outlet & inlet pipes 3/4”

16-g 1 CH return pipe 1”

16-h 1 Accessory box components list

17 1 Piping Adapter Kit - ELU-120WBN/ ELU-150WCN

(see Fig. 2 - next page)

17-a 1 + 1 Gas Adapter 3/4”+ 1 gas at

17-b 6 Gasket (2x1/2”+ 3x3/4” + 1 x 1” )

17-c 2 Cap 1/2”

17-d 4

Additional Gasket (1x1/2” + 1x3/4” + 1 x 1” + 1 GAS at )

17-e 1 CH supply pipe 1”

17-f 1 CH return pipe 1”

17-g 4 Clamp (2x3/4” + 2x1”)

17-h 1

DHW outlet pipe (150C)/Tank return pipe (120) 3/4”

17-i 1 DHW inlet ow restrictor (150C)1/2” x 3/4”

17-j 1 DHW inlet pipe 3/4”

17-k 2 Accessory box components list

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

ELU-150WCN / ELU-120WBN

Ø 1-1/8”

10" 1/16” (255 mm)

16” (406 mm)

Ø 1-1/8”Ø 7/8” Ø 7/8”

View from

the Front

6-11/16” (169 mm)

6-3/8” (162 mm)

2-3/16” (55 mm)

View from the Side

100 150

200

250

080

psi

Figure 2 - Included with the Boiler

How the Boiler Operates

ELU condensing technology intelligently delivers hydronic heating

while maximizing eciency. Outlined below are system features and

operation:

Stainless Steel Heat Exchanger

The highly ecient stainless steel heat exchanger is designed to

extract all available heat from the supply line before it is exhausted.

Modulating Combustion System

The combustion system modulates the output of the burner during

operation to match system demand and achieve the control set

point while in operation. The set point can change by internal or

external signals to enhance the overall performance of the system.

Control

The integrated control system monitors the system and regulates

fan speed to control boiler output. This allows the boiler to deliver

only the amount of heat energy required and nothing more.

The control can be set to monitor outdoor temperature through

an outdoor sensor or through internet weather (with optional WiFi

connection), use an optional room sensor, or use both outdoor

temperature and an optional room sensor to regulate boiler set

point. The system can be further enhanced by installing an indirect

water heater to provide domestic hot water.

The control can regulate the output of multiple boilers through

its cascade system function. The cascade system is capable of

connecting up to eight boilers together in such a way that they

function as one boiler system. This allows for greater turn down

ratios and provides systematic control of the multiple boilers in an

installation to minimize downtime and maximize eciency.

The cascade system works by establishing one boiler as the master

and the other connected boilers as followers. The master boiler

requires a sensor to provide feedback on set point temperature

in order to adjust heating input from the connected boilers. Each

cascaded boiler will have its own pump to provide maximum ow

and control heat exchanger ow rate.

Text Display and Operational Display Icons

The display allows the user to change system parameters and

monitor system outputs.

Gas Valve

Senses suction from the blower, allowing gas to ow only if powered

and combustion air is owing.

Integrated Venturi

Controls air and gas ow into the burner.

Burner

The high grade stainless steel burner uses premixed air and gas to

provide a wide range of ring rates.

Spark Ignition

The burner is ignited by applying high voltage through the system

spark electrode. The spark from the electrode ignites mixed gas o

of the burner.

Supply Water Temperature Sensor

This sensor monitors the boiler outlet water temperature (System

Supply). The control adjusts boiler ring rate so the supply

temperature will match the boiler set point.

Return Water Temperature Sensor

This sensor monitors boiler return water temperature (System

Return).

Flue Sensor

Monitors ue temperature and adjusts ring rate.

Temperature and Pressure Gauge

Allows the user to monitor system temperature and pressure.

Electrical eld connections with terminal strips

The electrical cover allows easy access to the clearly marked line

voltage and low voltage terminal strips to facilitate wiring the boiler.

Figure 3 - Adapter Kit Dimensions and Specications - Included with

Adapter Kit

17e

17f

17h

17i

17j

17g

17k

Gas

17a 17b

17d

17c

ACCESSORIESBOX

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420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

Condensate Collection System

This boiler is a high eciency appliance and will produce condensate.

The condensate collection system has a oat switch which monitors

condensate level and prevents condensate from backing up into the

combustion system. Inside the collection system is a built in trap

which seals the combustion system from the connected drain. This

condensate should be neutralized to avoid damage to the drainage

system or piping.

Outdoor Sensor

Monitors outdoor temperature and adjusts unit set point to provide

greater eciency.

0-10 Volt Input / 4-20 mA Input (with Optional Analog Clip-In

Board, part # 3319457)

Allows the installer to connect a BMS (Building Management System)

to control the boiler.

Condensate Trap and Air Pressure Switch

The condensate trap and air pressure switch prevent condensate

and heat exchanger exhaust backing up into the cabinet.

Pump Service Mode

Allows manual operation of pumps to commission system and check

pump operation.

Internal By-Pass Valve

Protects the boiler from damage in low ow conditions.

Internal ECM Pump

The internal ECM Pump uses less electricity than standard pumps,

providing high performance operation.

B. Optional Equipment

Optional equipment available from HTP (and Part #):

• Indirect Sensor (7250P-325)

• System Sensor (7250P-324)

• 3” PVC Concentric Vent Kit (KGAVT0601CVT)

• 3” Stainless Steel Vent Termination Kit (V1000)

• 3” Polypro Vent Kit (8400P-001)

• 3” Polypro Pipe

(33’length # 8400P-002, 49.5’length # 8400P-003)

• Condensate Neutralizer (7450P-212)

• Condensate Removal Pump (554200)

NOTE: When using an optional system sensor, pipe insulation

must be wrapped around it to improve temperature measurement

accuracy and increase overall system eciency.

COLD WEATHER HANDLING - If the boiler has been stored in a

very cold location (BELOW 0oF) before installation, handle with

care until the components come to room temperature. Failure to

do so could result in damage to the boiler.

Carefully consider installation when determining boiler location.

Please read the entire manual before attempting installation.

Failure to properly take factors such as boiler venting, piping,

condensate removal, and wiring into account before installation

could result in wasted time, money, and possible property damage

and personal injury.

CAUTION

Part 3 - Prepare the Boiler for Installation

WARNING

This boiler is certied for indoor use only. DO NOT INSTALL

OUTDOORS. Outdoor installations ARE NOT covered by warranty.

Failure to install the boiler indoors could result in property damage,

severe personal injury, or death.

A. Locating the Boiler

Incorrect ambient conditions can lead to damage to the heating

system and put safe operation at risk. Ensure that the installation

location adheres to the information included in this manual. Failure

to do so could result in property damage, serious personal injury, or

death. Failure of boiler or components due to incorrect operating

conditions IS NOT covered by product warranty.

This boiler must be installed upright in the vertical position as

described in this manual. DO NOT attempt to install this boiler

in any other orientation. Doing so will result in improper boiler

operation and property damage, and could result in serious

personal injury or death.

1. Installation Area (Mechanical Room) Operating Conditions

• Ensure ambient temperatures are higher than 32oF / 0oC and

lower than 104oF / 40oC

• Prevent the air from becoming contaminated by the

products, places, and conditions listed in this manual

• Avoid continuously high levels of humidity

• Never close existing ventilation openings

• Ensure a minimum 1” clearance around hot water and

exhaust vent pipes

• NOTE: To prevent condensing in the fan, it is recommended

to avoid prolonged exposure to temperatures below 45oF

WARNING

This boiler has a condensate disposal system that may freeze

if exposed to sustained temperatures below 32oF. Precautions

should be taken to protect the condensate trap and drain lines

from sustained freezing conditions.

Circulators suitable for DHW applications must be used.

Failure to take precautions could result in property damage, severe

personal injury, or death.

WARNING

2. Check for nearby connections to:

• System water piping

• Venting connections

• Gas supply piping

• Electrical power

• Condensate drain

3. Check area around boiler. Remove any combustible materials,

gasoline, and other ammable liquids.

CAUTION

The service life of the boiler’s exposed metallic surfaces, such as

the casing, as well as internal surfaces, such as the heat exchanger,

are directly inuenced by proximity to damp and salty marine

environments. In such areas higher concentration levels of

chlorides from sea spray coupled with relative humidity can lead

to degradation of boiler components. In these environments,

boilers must not be installed using direct vent systems which draw

outdoor air for combustion. Such boilers must be installed using

room air for combustion. Indoor air will have a much lower relative

humidity, and hence potential corrosion will be minimized.

Failure of the boiler or components due to incorrect operating

conditions IS NOT covered by product warranty.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

CAUTION

All boilers eventually leak. Locate the boiler where any leakage from

the relief valve, related piping, tank, or connections will not result

in damage to surrounding areas or lower oors of the building.

Any boiler should be installed in such a manner that if it should

leak the resulting ow of water will not cause damage to the area

in which it is installed. If the boiler is installed in a location where

a leak could cause damage, it is required to provide containment

measures. Such measures include but are not limited to: a properly

sized drain pan installed beneath the boiler and piped to an open

drain line, or installing the boiler on a concrete oor pitched to a

free owing drain. Failure to provide containment measures is the

sole responsibility of the owner and/or installer. Leakage damages

ARE NOT covered by warranty.

In addition, water leak detection devices and automatic water

shuto valves are readily available at plumbing supply houses. IT

IS HIGHLY RECOMMENDED BY THE MANUFACTURER TO INSTALL

WATER LEAK DETECTION DEVICES AND AUTOMATIC SHUTOFF

VALVES IN ANY BOILER INSTALLATION WHERE A LEAKAGE OF

WATER COULD RESULT IN PROPERTY DAMAGES.

WARNING

Failure to keep the boiler area clear and free of combustible

materials, liquids, and vapors can result in substantial property

damage, severe personal injury, or death.

4. Gas control system components must be protected from dripping

water during operation and service.

5. If the boiler is to replace an existing boiler, check for and correct

any existing system problems, such as:

• System leaks

• Location that could cause the system and boiler to freeze and

leak

• Incorrectly sized expansion tank

6. Clean and ush system when reinstalling a boiler.

Always take future maintenance into consideration when locating

the boiler. If the boiler is located in an installation location with

limited clearances, it may be necessary to remove the boiler

from the space to perform maintenance. Failure to consider

maintenance when determining installation location could result

in property damage.

CAUTION

WARNING

Do not introduce toxic chemicals, such as antifreeze or appliance

treatments, into any piping meant for potable water purposes.

Do not connect DHW connections to any heating systems or

components that have been previously used for nonpotable

applications.

Failure to follow these instructions could result in serious personal

injury or death.

Ensure that all piping and components connected to the appliance

are suitable for potable water applications.

B. Leveling

The boiler must be installed level for condensate to properly ow

out of the collection system. Failure to do so will result in improper

appliance operation.

C. Clearances for Service Access

NOTE: If you do not provide the minimum clearances shown in

Figure 5 and Table 6 it might not be possible to service the boiler

without removing it from the space.

Correct installation

Incorrect installation

CAUTION

NOTE: When installing in a zero clearance location, it may not be

possible to read or view some product labeling. It is recommended

to make note of the boiler model and serial number.

NOTE: A combustible door or removable panel is acceptable front

clearance.

Figure 4 - Proper levelling

B B

Dimension Description Clearance

ATop 14” (355.6 mm)

BRight or Left Side 2” (50.8 mm)

CFront 18” (457.2 mm)

DBottom 12” (304.8 mm)

Not Displayed Back 0” (0 mm)

Table 6 - Minimum Installation and Service Clearances

NOTE: For closet installations, a combustible door or removable

panel is acceptable front clearance. A 3” minimum clearance must

be provided from the appliance front cover to the removable panel

or combustible door.

Minimum Clearances from Combustible Materials

• Hot water pipes - at least 1”from combustible materials

• Exhaust vent pipe - at least 1”from combustible materials

Figure 5 - Minimum Clearances

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

D. Wall Mounting Considerations

These boilers are wall mounted. Use only the wall mounting

instructions included with this boiler.

Ensure the wall that the boiler is intended to be mounted on is

comprised of cement, brick, block, or wooden studs spaced 16” apart

from center. Ensure the wall is capable of supporting at least 150 lbs

(68 kgs).

If ooding is possible, elevate the boiler to prevent oodwater from

reaching the boiler.

Ensure the boiler is installed in a location that minimizes the risk of

water damage due to leaking valves, pumps, unions, etc.

The boiler may be installed on any suitable internal wall (suitable

sound-proong may be required when installing onto a stud partition

wall).

WARNING

Ensure that the structure of the installation location is sucient to

support the full installed weight of the boiler, including water content

of the heat exchanger and related piping and components. If the

mounting location cannot support a minimum of 150 lbs. (68 kg), it

is recommended to locate the boiler in a mounting location that can

support the minimum weight. Failure to ensure the structure of the

installation location is structurally sound before installation of the

boiler and properly mount the boiler can result in structural failure,

substantial property damage, severe personal injury, or death.

Do not mount the boiler to a hollow wall.

WARNING

The space must be provided with correctly sized combustion/

ventilation air openings for all other appliances located in the

space with the boiler. For power venting installations using room

air for combustion, refer to the boiler venting section, this manual,

for descriptions of conned and unconned spaces. Do not install

the boiler in an attic.

The boiler cover must be securely fastened

to prevent the boiler from drawing air from the boiler room. This is

particularly important if the boiler is in a room with other appliances.

Failure to comply with the above warnings could result in substantial

property damage, severe personal injury, or death.

Boiler Area Ventilation Air Openings - Closet Installations

If the boiler is installed in a closet or alcove the boiler area/room must

be ventilated.

EXCEPTION: If the boiler area/room has a volume of 150 ft3or greater,

ventilation of the boiler area/room is not required.

Each ventilation air opening must meet the minimum requirements

of 1 in2per 1000 BTU/hr., but not less than 100 in2. The lower ventila-

tion opening must be located within 6 in. of the oor, while the upper

opening must be located 6 in. from the top of the space.

If the boiler area has a volume less than 150 ft3, it is considered a

Closet or Alcove. In the US/Canada, PVC vent pipe and ttings SHALL

NOT BE USED within the closet or alcove. Only approved CPVC,

Polypropylene, or Stainless Steel vent pipe and ttings may be used.

See Table 12 for a list of approved materials. Under all circumstances

proper ventilation must be provided.

Alcove Installations

Alcove installations have the same minimum dimensions as closet

installations, except the installation must be completely open to the

room at a distance no greater than 18 in. (457 mm) from the front of

the boiler and the room must be at least three (3) times the size of the

alcove. Provided these conditions are met, the boiler requires no extra

ventilation air openings to the space. If these conditions are not met,

follow the requirements for Closet Installations.

Position the paper template on the concrete wall to locate the

positions of the hanging bracket and piping bracket.

Drill and plug the wall and secure the hanging bracket using the

screws provided (Fischer S 10x50). Ensure the hanging bracket is

level.

Secure the piping bracket on the concrete wall. Use suitable

hardware.

WARNING

This boiler is too heavy for one person to lift. It is highly

recommended to install the boiler with two people. Use caution

as to not drop the boiler, which could damage the boiler and

cause property damage and/or severe personal injury. Verify

that the boiler is properly and securely mounted before leaving

unsupervised. Failure to comply with the above and properly

mount the boiler could result in substantial property damage,

severe personal injury, or death.

E. Wall Mounting Instructions

1. Mounting to a concrete wall

STUDSTUD

Plywoodboard

Dimensions:

24"wide x 48" high x 1/2" thick

(239,75mm)

(13,1mm)

(226,65mm)

(65mm) (65mm)

(67mm)(67mm)

(131,76mm)

(87,2mm) (87,2mm)(87,6mm) (87,6mm)

3-7/16”

2-9/16”

8-15/16”

5-3/16”

2-9/16”

1/2”

9-7/16”

2-5/8” 2-5/8”

3-7/16”

1-1/8”

9/16”

3-7/16” 3-7/16”

(1108,15mm)

(745mm)

(146,26mm)

(110mm)

43-5/8”

29-5/16”

(400mm)

(120mm)

(406,4mm)

(120mm)

(34,2mm)

(136,5mm)

15-3/4”

5-3/4”

4-5/16”

4-3/4” 4-3/4”

1-3/8”

5-3/8”

(330mm)

13”

16”

100 150

200

250

080

psi

WARNING

THEMANUFACTURER CANNOT ANTICIPATEALL INSTALLATION CONDITIONS.THESE INSTRUCTIONS AND

INCLUDEDPARTS MAYNOT APPLY TO WALL-MOUNTINGTHE BOILER ATYOUR INSTALLATION LOCATION.

THEBOILER MUST BE PROPERLY AND SECURELY MOUNTED BY A QUALIFIED INSTALLERACCORDING TO

INSTALLATIONCONDITIONS, THE TECHNICAL SPECIFICATIONSOF THE APPLIANCE, AND TO MEET AHJ /

BUILDINGCODE REQUIREMENTS. ALL APPLICABLE PERMITS MUST BE OBTAINEDBEFORE INSTALLINGTHE

BOILER. FAILURETO FOLLOW THESE INSTRUCTIONS COULD RESULT IN PROPERTY DAMAGE, SEVERE

PERSONAL INJURY,OR DEATH. ANY DAMAGES RESULTING FROM IMPROPER INSTALLATIONARE NOT

COVEREDBY PRODUCT WARRANTY.

MOUNTINGTO A WOOD STUDDED WALL

To install the boiler on a standard wood studded wall a plywood board is required.The minimum

dimensionsof the plywood board are: 24" wide x 48" high x 1/2" thick.

Useat least fourteen (14) #12 x 3" (3/16" x 3") round head tapping screws to secure the plywood board to

thestudded wall.

Positionthe paper templateon the concrete wall to locate the positions of the hanging bracket and piping

bracket.

Drilland plug the wall and secure the hanging bracket using the screws provided (ﬁsher S 10x50). Ensure

thehanging bracket is level.

Securethe piping bracket on the concrete wall. Use suitable hardware.

WALLMOUNTING INSTRUCTIONS

Afterthe plywood board has been installed to the studs, position the paper template on the plywood.

Locatethe positions of the hanging bracket and piping adapter bracket. Position the wall mounting and

pipingadapter brackets. Ensure the brackets are level.Then mark the bracket drilling holes.

Mountthe boilerbracketon the plywood board. Use the hardware delivered with the boiler

(ﬁsherS 10x50) andwashersfor wood mounting.

Mount the piping bracket on the plywood board. Use suitable hardware .

Figure 6 - Mounting to a concrete wall

Use extreme care not to drop the boiler or cause bodily injury while

lifting or mounting the boiler onto the wall mount bracket.

Failure to follow these instructions could result in property damage,

severe personal injury, or death.

WARNING

This wall mounting system is not seismic rated and should not be

applied as such. Failure to comply with the above and properly

mount the boiler could result in substantial property damage,

severe personal injury, or death.

The manufacturer cannot anticipate all installation conditions. These

instructions and included parts may not apply to wall-mounting the

appliance at your installation location. The appliance must be properly

and securely mounted by a qualied installer according to installation

conditions, the technical specications of the appliance, and to meet AHJ

/ building code requirements. All applicable permits must be obtained

before installing the appliance. Failure to follow these instructions could

result in property damage, severe personal injury, or death. Any damages

resulting from improper installation are not covered by product warranty.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

2. Mounting to a Wood Studded Wall

CAUTION

If the boiler is not installed upright, vertically plumb, and level,

improper and unsatisfactory operation may occur, causing

excessive condensation build-up, nuisance fault codes, and

unnecessary maintenance.

16 “

STUDSTUD

Plywood board

Dimensions:

24" wide x 48" high x 1/2" thick

(239,75 mm)

(13,1 mm)

(226,65 mm)

(65 mm) (65 mm)

(67 mm)(67 mm)

(131,76 mm)

(87,2 mm) (87,2 mm)(87,6 mm) (87,6 mm)

3-7/16”

2-9/16”

8-15/16”

5-3/16”

2-9/16”

1/2”

9-7/16”

2-5/8” 2-5/8”

3-7/16”

1-1/8”

9/16”

3-7/16” 3-7/16”

(1108,15 mm)

(745 mm)

(146,26 mm)

(110 mm)

43-5/8”

29-5/16”

(400 mm)

(120 mm)

(406,4 mm)

(120 mm)

(34,2 mm)

(136,5 mm)

15-3/4”

5-3/4”

4-5/16”

4-3/4” 4-3/4”

1-3/8”

5-3/8”

(330 mm)

13”

16”

100 150

200

250

080

psi

WARNING

THE MANUFACTURERCANNOT ANTICIPATE ALL INSTALLATIONCONDITIONS. THESE INSTRUCTIONS AND

INCLUDED PARTSMAY NOT APPLYTO WALL-MOUNTINGTHE BOILER AT YOUR INSTALLATIONLOCATION.

THE BOILER MUST BE PROPERLYAND SECURELY MOUNTED BY A QUALIFIED INSTALLER ACCORDINGTO

INSTALLATIONCONDITIONS, THE TECHNICAL SPECIFICATIONS OF THE APPLIANCE,AND TO MEET AHJ /

BUILDINGCODE REQUIREMENTS. ALL APPLICABLE PERMITS MUST BE OBTAINED BEFORE INSTALLINGTHE

BOILER. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN PROPERTY DAMAGE, SEVERE

PERSONAL INJURY, OR DEATH. ANY DAMAGES RESULTING FROM IMPROPER INSTALLATION ARE NOT

COVEREDBY PRODUCT WARRANTY.

MOUNTINGTO A WOOD STUDDED WALL

To install the boiler on a standard wood studded wall a plywood board is required. The minimum

dimensions of the plywood board are: 24" wide x 48" high x 1/2" thick.

Use at least fourteen (14) #12 x 3" (3/16" x 3") round head tapping screwsto secure the plywood board to

the studded wall.

Positionthe paper template on the concrete wall to locate the positions of the hanging bracket and piping

bracket.

Drill and plug the wall and secure the hanging bracketusing the screws provided (ﬁsher S 10x50). Ensure

the hanging bracketis level.

Secure the piping bracketon the concrete wall. Use suitable hardware.

WALLMOUNTING INSTRUCTIONS

After the plywood board has been installed to the studs,position the paper template on the plywood.

Locate the positions of the hanging bracket and piping adapter bracket.Position the wall mounting and

piping adapter brackets.Ensure the brackets are level. Then mark the bracket drilling holes.

Mount the boilerbracket on the plywood board. Use the hardware delivered with the boiler

(ﬁsher S 10x50) andwashers for wood mounting.

Mount thepiping bracket on the plywood board. Use suitable hardware .

To install the boiler on a standard wood studded wall with 16”

centers, a plywood board is required. The minimum dimensions of

the plywood board are: 24”wide x 48” high x 1/2” thick.

Use at least fourteen (14) #12 x 3” (3/16” x 3”) round head tapping

screws to secure the plywood board to the studded wall.

After the plywood board has been installed to the studs, position the

paper template on the plywood.

Locate the positions of the hanging bracket and piping adapter

bracket. Position the wall mounting and piping adapter brackets.

Ensure the brackets are level. Then mark the bracket drilling holes.

Mount the boiler bracket on the plywood board. Use the hardware

delivered with the boiler (Fischer S 10x50) and washers for wood

mounting.

Mount the piping bracket on the plywood board. Use suitable

hardware .

Figure 7 - Mounting a plywood board

Figure 8 - Mounting the hanging bracket and piping bracket

16 “

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

F. Residential Garage and Closet Installations

Precautions

If the boiler is located in a residential garage, per ANSI Z223.1:

• Mount the bottom of the boiler a minimum of 18” above the

oor of the garage to ensure the burner and ignition devices

are well o the oor.

• Locate or protect the boiler so it cannot be damaged by a

moving vehicle.

CAUTION

CheckwithyourlocalAuthorityHavingJurisdictionforrequirements

when installing the boiler in a garage or closet. Please read the

entire manual before attempting installation. Failure to properly

take factors such as boiler venting, piping, condensate removal,

and wiring into account before installation could result in wasted

time, money, and possible property damage and personal injury.

WARNING

G. Exhaust Vent and Intake Pipe

The boiler is rated ANSI Z21.13 Category IV (pressurized vent, likely

to form condensate in the vent) and requires a special vent system

designed for pressurized venting.

NOTE: The venting options described here (and further detailed

in the Venting section, this manual) are the lone venting options

approved for this boiler. Failure to vent the boiler in accordance

with the provided venting instructions will void the warranty.

The space must be provided with correctly sized combustion/

ventilation air openings for all other appliances located in the

space with the boiler. For power venting installations using room

air for combustion, refer to the boiler venting section, this manual,

for descriptions of conned and unconned spaces. Do not install

the boiler in an attic. Failure to comply with these warnings could

result in substantial property damage, severe personal injury, or

death.

DANGER

Failure to vent the boiler properly will result in serious personal

injury or death.

WARNING

Do not attempt to vent this boiler by any means other than those

described in this manual. Doing so will void the warranty and may

result in severe personal injury or death.

Vents must be properly supported. Boiler exhaust and intake

connections are not designed to carry heavy weight. Vent support

brackets must be within 1’ of the boiler and the balance at 4’

intervals. Boiler must be readily accessible for visual inspection for

rst 3’from the boiler. Failure to properly support vents could result

in property damage, severe personal injury, or death.

The exhaust discharged by this boiler may be very hot. Avoid

touching or other direct contact with the exhaust gases of the vent

termination assembly. Doing so could result in severe personal

injury or death.

1. Direct Vent of Exhaust and Intake

If installing a direct vent option, combustion air must be drawn

from the outdoors directly into the boiler intake and exhaust must

terminate outdoors. There are three basic direct vent options

detailed in this manual: 1. Side Wall Venting, 2. Roof Venting, and 3.

Unbalanced Venting.

Be sure to locate the boiler such that the exhaust vent and intake

piping can be routed through the building and properly terminated.

Dierent vent terminals can be used to simplify and eliminate

multiple penetrations in the building structure (see Optional

This boiler requires fresh, uncontaminated air for safe operation and must

be installed in a mechanical room where there is adequate combustion

and ventilating air. NOTE: To prevent combustion air contamination,

see Table 7.

Combustion air from the indoor space can be used if the space has

adequate area or when air is provided through a duct or louver to supply

sucient combustion air based on the boiler input. Never obstruct the

supply of combustion air to the boiler. If the boiler is installed in areas

where indoor air is contaminated (see Table 7) it is imperative that the

boiler be installed as direct vent so that all combustion air is taken

directly from the outdoors into the boiler intake connection.

Unconned space is space with volume greater than 50 cubic feet per

1,000 BTU/hr (4.8 cubic meters per kW) of the total input rating of all fuel-

burning appliances installed in that space. Rooms connected directly to

this space through openings not furnished with doors are considered

part of the space. See Venting Section for details.

Conned space is space with volume less than 50 cubic feet per 1,000

BTU/hr (4.8 cubic meters per kW) of the total input rating of all fuel-

burning appliances installed in that space. Rooms connected directly to

this space through openings not furnished with doors are considered

part of the space.

When drawing combustion air from inside a conventionally constructed

building to a conned space, such space should be provided with two

permanent openings: one located 6” (15 cm) below the space ceiling,

the other 6” (15cm) above the space oor. Each opening should have a

free area of one square inch per 1,000 BTU/hr (22cm

/kW) of the total

input of all appliances in the space, but not less than 100 square inches

(645cm

If the conned space is within a building of tight construction, air for

combustion must be obtained from the outdoors as outlined in the

Venting section of this manual.

2. Power Venting, Indoor Combustion Air in Conned or

Unconned Space

CAUTION

When drawing combustion air from the outside into the mechanical

room, care must be taken to provide adequate freeze protection.

WARNING

Failure to provide an adequate supply of fresh combustion air can

cause poisonous ue gases to enter the living space, resulting

in severe personal injury or death. To prevent combustion air

contamination, see Table 7.

In the Commonwealth of Massachusetts and As Required by

State and Local Codes:

Installation of Carbon Monoxide Detectors: At the time of installation

or replacement of the vented gas fueled appliance, the installing

plumber or gas tter shall observe that a hard wired carbon

monoxide detector with an alarm and battery back-up is installed

on the oor level where the gas appliance is installed, unless the

appliance is located in a detached, uninhabitable structure separate

from the dwelling, building, or structure used in whole or in part for

residential purposes.

In addition, the installing plumber or gas tter shall observe that a

hard wired carbon monoxide detector with an alarm and battery

back-up is installed on each additional level of the dwelling,

building, or structure served by the vented gas appliance. It shall

be the responsibility of the property owner to secure the service

H. Carbon Monoxide Detectors

Equipment in Venting Section). The exhaust vent and intake piping

lengths, routing, and termination methods must all comply with the

methods and limits given in the Venting Section, this manual.

When installing a combustion air intake from outdoors, care must

be taken to utilize uncontaminated combustion air. To prevent

combustion air contamination, see Table 7.

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

WARNING

Do not attempt to vent this appliance by any means other than

those described in this manual. Doing so will void the warranty and

may result in severe personal injury or death.

Approved Carbon Monoxide Detectors: Each carbon monoxide

detector as required in accordance with the above provisions shall

comply with NFPA 70 and be ANSI/UL 2034 listed and IAS certied.

I. Prevent Combustion Air Contamination

Install intake air piping for the boiler as described in the Venting

Section, this manual. Do not terminate exhaust in locations that can

allow contamination of intake air.

WARNING

Ensure that the intake air will not contain any of the contaminants

in Table 7. Contaminated air will damage the boiler, resulting in

possible substantial property damage, severe personal injury, or

death. For example, do not pipe intake air near a swimming pool or

laundry facilities. These areas always contain contaminants.

of qualied licensed professionals for the installation of hard wired

carbon monoxide detectors.

a. In the event that the vented gas fueled appliance is installed in a

crawl space or attic, the hard wired carbon monoxide detector with

alarm and battery back-up shall be installed on the next adjacent

oor level.

b. In the event that these requirements cannot be met at the time

of completion of installation, the owner shall have a period of

thirty (30) days to comply with the above requirements; provided,

however, that during said thirty (30) day period, a battery operated

carbon monoxide detector with an alarm shall be installed.

Figure 9 - CO Warning Label

J. Removing a Boiler from a Common Vent System

WARNING

Failure to follow all instructions can result in ue gas spillage and

carbon monoxide emissions, causing severe personal injury or

death.

DANGER

Do not install the boiler into a common vent with any other

appliance.This will cause ue gas spillage or appliance malfunction,

resulting in possible substantial property damage, severe personal

injury, or death.

When removing an existing boiler, follow the steps below.

1. Seal any unused openings in the common venting system.

2. Visually inspect the venting system for proper size and horizontal

pitch to determine if there is blockage, leakage, corrosion, or other

deciencies that could cause an unsafe condition.

3. If practical, close all building doors, windows, and doors between

the space in which the boiler remains connected to the common

venting system and other spaces in the building. Turn on clothes

dryers and any appliances not connected to the common venting

system.Turn on any exhaust fans, such as range hoods and bathroom

exhausts, at maximum speed. Do not operate a summer exhaust fan.

Close all replace dampers.

4. Place in operation the appliance being inspected. Follow the

lighting instructions. Adjust the thermostat so the appliance will

operate continuously.

5. Test for spillage at the draft hood relief opening after 5 minutes of

main burner operation. Use the ame of a match or candle or smoke

from a cigarette.

6. After it has been determined that each appliance remaining

connected to the common venting system properly vents when

tested as outlined, return doors, windows, exhaust fans, replace

dampers, and any other gas burning appliances to their previous

condition of use.

7. Any improper operation of the common venting system should

be corrected to conform to the National Fuel Gas Code, ANSI Z223.1.

When resizing any portion of the common venting system, the

system should approach the minimum size as determined using the

appropriate tables in Appendix G of ANSI Z223.1.

NOTE: DAMAGE TO THE BOILER CAUSED BY EXPOSURE TO

CORROSIVE VAPORS IS NOT COVERED BY WARRANTY. (Refer to

the limited warranty for complete terms and conditions.)

Products to Avoid Areas Likely to Have

Contaminants

Spray cans containing

uorocarbons

Dry cleaning / laundry areas

and establishments

Permanent wave solutions Swimming pools

Chlorinated waxes / cleaners Metal fabrication plants

Chlorine-based swimming pool

chemicals Beauty shops

Calcium chloride used for

thawing Refrigeration repair shops

Sodium chloride used for water

softening Photo processing plants

Refrigerant leaks Auto body shops

Paint or varnish removers Plastic manufacturing plants

Hydrochloric or Muriatic acid Furniture renishing areas and

establishments

Cements and glues New building construction

Antistatic fabric softeners used

in clothes dryers Remodeling areas

Chlorine-type bleaches, laundry

detergents, and cleaning

solvents

Garages and workshops

Adhesives used to fasten

building products

Table 7 - Products and Areas Likely to Have Contaminants

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

K. Technical Specications

Table 8 - Technical Specications

NOTES:

1Listed Input and Output Ratings are at minimum vent lengths at an altitude of 0 - 2000 ft. Numbers will be lower with longer venting and/or

altitudes greater than 2000 ft.

2Ratings based on standard test procedures prescribed by the US Department of Energy.

3The ELU requires a special venting system. Use only the vent materials and methods detailed in these installation instructions.

Model ELU-85WBN ELU-120WBN ELU-120WCN ELU-150WCN

Type Boiler Combi

Installation Indoor, Wall Hung, Fully Condensing

Space Heating

Minimum / Maximum Input (Btu/Hr)19,400 / 85,000 13,200 / 120,000 11,200 / 106,000 13,200 / 120,000

Domestic Hot Water

Minimum / Maximum Input (Btu/Hr)1N/A N/A 11,200 / 114,000 13,200 / 150,000

DOE AFUE2 (%) 96 95 95.5 95

Heating Capacity1, 2 (MBH) 79 111 98 111

Net AHRI Rating, Water (MBH)269 97 85 97

Hot Water Capacity

35oF Rise N/A N/A 6.0 7.9

45oF Rise N/A N/A 4.7 6.1

77oF Rise N/A N/A 2.7 3.6

Flue System Category IV, Sealed Combustion Direct Vent, Power Vent

Minimum - Maximum Exhaust Vent Run32” (6 - 100 feet), 3”(6 - 150 feet)

Minimum - Maximum Intake Air Pipe Run32”(0 - 100 feet), 3” (0 - 150 feet)

Approved Exhaust Vent Materials3PVC, CPVC, PP, Stainless Steel

Shipping Weight (lbs) 78 84 83 84

Gas Supply

Pressure

NG 3.5” to 10.5” WC

LP 8” to 13” WC

Power Supply 120V, 60 Hz, less than 12A

General Operating Conditions Ambient Temperature Range: 33 – 104oF (0.6 – 40oC)

Product Approvals and Requirements: ANSI Z21.13 / CSA 4.9

Ignition System Direct Electronic Spark Ignition / Flame Rectication

Burner System Premixed Fuel Modulation / Stainless Steel Burner

Gas Valve System Air Ratio Valve

Dimensions

(in Inches)

W16” 3/64

H43” 5/8

D15” 1/8

Approx. Full Boiler Weight (lbs) 88.2 88.6 91 92.8

Boiler Water Content (Gallons) 1.1 1.2 1.1 1.2

Boiler Setpoint Temperature Range 68 – 122oF Low Temperature / 86 - 179oF High Temperature

DHW Indirect Setpoint Temperature Range 104 – 149oF

DHW Setpoint Range (Combi Models) 97 – 140oF

Water Pressure (PSI)

Heat Exchanger MAWP 50

Pressure Relief Valve 30

DHW Max Pressure N/A N/A 150 150

Control Panel / Main Controller AristonThermo LCD Display / AristonThermo GALEVO2 Control

Connection

Sizes

CH Supply / Return 1” Male Sweat with Adapter

DHW Inlet / Outlet 3/4” Male Sweat with Adapter

Gas Inlet 3/4” Male NPT

Materials Cabinet Painted Steel and Plastic

Heat Exchanger Type 441 Stainless Steel Water Tube

Safety Devices

Flame Rectier Probe, Temperature Limit Control (190oF), Water Pressure Switch (Min. 8 PSI), Freeze

Protection, Blocked Condensate Pressure Switch, Condensate Trap, Flue Temperature High Limit Sensor

(210oF), Blocked Vent Pressure Switch

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

Figure 10 - Boiler Dimensions - NOTE: All Dimensions Are Approximate

(55,3mm)

(150 mm)

(390 mm)

2-3/16”

5-7/8”

15-5/16”

(120 mm)

4-3/4”4-3/4”

(120 mm)

4-5/16”

(110 mm)

(136,5 mm)

5-3/8”

(34,2 mm)

1-3/8”

(400 mm)

15-3/4”

(87,2 mm)

3-7/16”

(87,2 mm)

3-7/16”3-7/16”

(87,6 mm)

3-7/16”

(87,6 mm)

(65mm) (67mm)

2-9/16” (65mm)

2-9/16”2-5/8” (67mm)

2-5/8”

13,1 mm

1/2”

9-7/16”

(239,75 mm)

8-15/16”

(226,65 mm)

(1108,15 mm)

43-5/8”

(745 mm)

29-5/16”

A B C D E

Model ELU85WBN ELU120WBN Model ELU120WCN ELU150WCN

A - Central Heating Supply 1” A - Central Heating Supply 1”

B - Return from Indirect Water Heater 3/4” B - Domestic Hot Water Outlet 3/4”

C - Gas Inlet 3/4” C - Gas Inlet 3/4”

D - Domestic Hot Water Inlet Not Used D - Domestic Hot Water Inlet 3/4”

E - Central Heating Return 1” E - Central Heating Return 1”

F - Pressure Relief Valve 3/4” F - Pressure Relief Valve 3/4”

Table 9 - Boiler Adapter Dimensions

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

1. Pressure relief valve

2. Air purge valve

3. Boiler outlet temperature sensor

4. Air pressure switch

5. Flue gas temperature sensor

6. Main heat exchanger

7. Flame detection electrode

8 Silencer

9. Junction box

11. Condensate trap

12. Gas valve

13. Control panel

14. CH circuit lter

ELU85WBN - ELU120WBN

Figure 11 - Boiler Component Locations and Descriptions

15. Circulation Pump with auto air vent

17. Water pressure switch

18. Modulating Fan

19. Boiler inlet temperature sensor

20. Frame

21. Ignition electrode

22. Spark generator

23. Combustion Analysis Test Point

24. Air intake connection

25. Exhaust vent connection

26. Diverter valve

420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21

ELU120WCN - ELU150WCN

1. Pressure relief valve

2. Air purge valve

3. Boiler outlet temperature sensor

4. Air pressure switch

5. Flue gas temperature sensor

6. Main heat exchanger

7. Flame detection electrode

8 Silencer

9. Junction box

10. DHW heat exchanger

11. Condensate trap

12. Gas valve

13. Control panel

14. CH circuit lter

15. Circulation Pump with auto air vent

16. DHW Flow switch

17. Water pressure switch

18. Modulating Fan

19. Boiler inlet temperature sensor

20. Frame

21. Ignition electrode

22. Spark generator

23. Combustion Analysis Test Point

24. Air intake connection

25. Exhaust vent connection

26. Diverter valve

Figure 12 - Combi Boiler Component Locations and Descriptions

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