ECR International GreenMountain GMGW Gebrauchsanweisung

Manufactured by:

ECR International Inc.

2201 Dwyer Avenue, Utica, NY 13501

Tel. 800 325-5479

www.ecrinternational.com

PN 240013345 REV. B [10/01/2021]

Models

GMGW-8D

GMGW-9D

GMGW

GAS-FIRED

HOT WATER BOILERS

INSTALLATION, OPERATION &

MAINTENANCE MANUAL

C.S.A. Certied for

Natural gas or

Propane

Tested for 50 psi.

ASME Working

Pressure

Fully Assembled Boiler Vent Damper Pump (Optional) *Drain Valve

*ASME Safety Relief

Valve *Tridicator *Fuse Link w/

Instruction Tag *Nipple 3/4”x6-1/2 “

Includes Essential

Documents and Warranty

11x17 Wire Diagrams

Document Package *Circulator Harness

Information and specications outlined in this manual in eect at the

time of printing of this manual. ECR International reserves the right to

discontinue, change specications or system design at any time without

notice and without incurring any obligation, whatsoever.

* Items found in parts box included with your boiler.

KEEP THIS MANUAL NEAR BOILER

RETAIN FOR FUTURE REFERENCE

For Parts lists see manual 240013346 included with your boiler literature package.

ITEMS INCLUDED WITH YOUR BOILER

PN 240013345 Rev. B [10/01/2021]

Contents

1 - Dimensions............................................................ 4

2 - Safety Symbols And Warnings .................................. 5

2 - Safety Symbols And Warnings .................................. 6

3 - Locating The Boiler ................................................. 7

4 - Connecting Supply And Return Piping ........................ 9

5 - Ventilation & Combustion Air .................................. 14

6 - Chimney And Vent Pipe Connection ......................... 15

7 - Vent Damper Operation ......................................... 17

8 - Gas Supply Piping................................................. 18

9 - Electrical Wiring ................................................... 19

10 - Wiring Diagram .................................................. 20

11 - General Instructions............................................ 21

12 - Lighting Instructions ........................................... 22

13 - Operating Your Boiler .......................................... 23

14 - Service Hints...................................................... 26

15 - Maintaining Your Boiler ........................................ 27

16 - Boiler Ratings And Capacities ............................... 28

Appendix A - Control Function ..................................... 29

Appendix B - Vent Damper Installation ......................... 32

TABLE OF CONTENTS

PN 240013345 Rev. B [10/01/2021]

1 - DIMENSIONS



Figure 1 - Dimensions

1 1/4” RETURN

PN 240013345 Rev. B [10/01/2021]

Table 1 - Dimensions

BOILER

MODEL

NUMBER

DIMENSIONS (INCH.)

FLUE

DIAMETER

“A”

WIDTH

GMGW-8D 7 27½

GMGW-9D 7 30¾

Add 5½” to height for vent Damper.

2 - SAFETY SYMBOLS AND WARNINGS

CAUTION

Indicates a hazardous situation which, if not

avoided, could result in minor or moderate injury.

WARNING

Indicates a hazardous situation which, if not

avoided, could result in death or serious injury.

DANGER

Indicates a hazardous situation which, if not

avoided, WILL result in death or serious injury.

This is the safety alert symbol. Symbol alerts

you to potential personal injury hazards. Obey all

safety messages following this symbol to avoid

possible injury or death.

Become familiar with symbols identifying potential hazards.



2.1. Safety Information

WARNING

Do not tamper with or use this boiler for any

purpose other than its intended use. Failure to

follow these instructions could result in death or

serious injury. Use only manufacturer recommended

parts and accessories.

CAUTION

Laceration, burn hazard. Metal edges and parts

may have sharp edges and/or may be hot. Use

appropriate personal protection equipment to

include safety glasses and gloves when installing

or servicing this boiler. Failure to follow these

instructions could result in minor or moderate injury.

NOTICE

Used to address practices not related to personal

injury.

WARNING

Fire, explosion, asphyxiation and electrical shock

hazard. Improper installation could result in death

or serious injury. Read this manual and understand

all requirements before beginning installation.

FOR YOUR SAFETY READ BEFORE OPERATING

Hot Water Can Scald!

Water heated to temperature for clothes washing,

dish washing and other sanitizing needs can scald and

cause permanent injury.



persons are more likely to be permanently injured by

hot water. Never leave them unattended in bathtub or

shower. Never allow small children to use a hot water

tap or draw their own bath.



description, or if state laws or local codes require

certain water temperatures at hot water taps, you

must take special precautions:

• Use lowest possible temperature setting.

• Install some type of tempering device, such as

an automatic mixing valve, at hot water tap or

water heater. Automatic mixing valve must be

selected and installed according to manufacturer's

recommendations and instructions.

• Water passing out of drain valves may be

extremely hot. To avoid injury:

• Make sure all connections are tight.

• 

DANGER

Water

Temperature

Seng

1st Degree Burn

Exposure Time For

An Adult

2nd and 3rd Degree Burn

Exposure Time For An

Adult

120° F 1 minute 5 minutes

130° F 5 seconds 30 seconds

140° F 2 seconds 5 seconds

150° F 1 second 1.5 seconds

160° F Instantaneous 0.5 seconds

Note: Warning for Infants, Children, and Elderly:

Great care must be taken when exposing the

aforementioned groups to warm or hot water as they

can be badly burned in exposure times less than half

of the time for an adult.

PN 240013345 Rev. B [10/01/2021]

WARNING

Keep boiler area clear and free from combustible



liquids.

DO NOT obstruct air openings to the boiler room.





result in personal injury or loss of life.

Installation and service of this boiler shall be performed



When this product is installed in the Commonwealth

of Massachusetts the installation shall be performed

by a Licensed Plumber or Licensed Gas Fitter.

2.2 For Your Safety 2.2 For Your Safety

Manufacturer recommends a carbon monoxide detectorManufacturer recommends a carbon monoxide detector





jurisdictions may, by law, require.jurisdictions may, by law, require.

WARNING

Fire, Explosion, Asphyxiation, Electrical shock

hazard! Flooding will result in damages such as

electrical problems, corrosion, inoperative parts,

mold and other unforeseen issues which can

occur over time. Any equipment determined by



excess of water or other liquid, shall be replaced.

Failure to follow these directions will result in a

Hazardous Situation.

WARNING

Combustion chamber insulation in this product



can be converted to cristobalite in very high

temperature applications. The International Agency

for Research on Cancer (IARC) has concluded,

Crystalline silica inhaled in the form of quartz

or cristobalite from occupational sources is

carcinogenic to humans (Group1). Avoid breathing

dust and contact with skin and eyes. Use NIOSH



respirator is based on the OSHA requirements

for cristobalite at the time this document was

written. Other types of respirators may be

needed depending on the job site conditions.

Current NIOSH recommendations can be found

on the NIOSH website https://www.cdc.gov/

niosh/topics/silica/. NIOSH approved respirators,

manufacturers, and phone numbers are also listed



clothing, gloves, and eye protection. Apply enough

water to the combustion chamber lining to prevent

dust. Wash potentially contaminated clothes

separately from other clothing. Rinse clothes

washer thoroughly.

NIOSH stated First Aid. Eye: Irrigate immediately.

Breathing: Fresh air.

2 - SAFETY SYMBOLS AND WARNINGS

To Installer leave all instructions with boiler for future

reference.

PN 240013345 Rev. B [10/01/2021]

3 -LOCATING THE BOILER

Table 2 -

MINIMUM CLEARANCE DIMENSIONS

Inches (mm)

Top 6”

(152mm)

Rear 6”

(152mm)

Control Side 7” (178mm)

Opposite Side 6” (152mm)

Front 18” (457mm)

Flue/Vent Connector 6” (152mm)

Near Boiler Piping 2” (51mm)

NOTE: Greater clearances for access should supersede fire

protection clearances.



front of boiler. ANSI standard for alcove is 18 inches from

front of appliance to leading edge of side walls as shown

below.

Installation shall conform to the requirements of the

authority having jurisdiction or, in the absence of such

requirements, to the National Fuel Gas Code, ANSI

Z223.1/NFPA 54, and/or Natural Gas and Propane

Installation Code, CAN/CSA B149.1.

Where required by the authority having jurisdiction, the

installation shall conform to the Standard for Controls



ANSI/ASME CSD-1.



installation shall be in accordance with "Venting of

Equipment”, of the National Fuel Gas Code, ANSI

Z223.1/NFPA 54, or "Venting Systems and Air Supply

for Appliances," of the Natural Gas and Propane

Installation Code, CAN/CSA B149.1, or applicable

provisions of the local building codes.

Boiler has met safe lighting and other performance

criteria with the gas manifold and control assembly on

the boiler per the latest revision of ANSI Z21.13/CGA

4.9.

Install boiler such that gas ignition system components

are protected from water (dripping, spraying, rain,

etc.) during appliance operation and service, (circulator

replacement, condensate trap, control replacement,

etc.).

Locate boiler on level, solid base as near chimney as

possible and centrally located with respect to heat

distribution system as practical.

Allow 24 inches (610mm) at front and right side for

servicing and cleaning.

When installed in utility room, door should be wide

enough to allow largest boiler part to enter, or to

permit replacement of another appliance such as water

heater.

Minimum Clearances to Combustible

Construction (as seen from above)

BOILER

18"

Front

Control

Side

FOR INSTALLATION ON NON-COMBUSTIBLE

FLOORS ONLY - For installation on combustible



(Combustible Floor Addendum) included in literature

envelope provided with boiler and outlined in National

Fuel Gas Code, ANSI Z223.1/NFPA 54. Do Not Install

Boiler on carpeting.

3.1 Installation Requirements

CAUTION

Boiler weight exceeds 200 pounds (90.7 kg). Do not

lift boiler without assistance.

WARNING

Fire hazard. Do not install boiler on combustible



instructions could result in death or serious injury.

PN 240013345 Rev. B [10/01/2021]

3.3 Boiler Location Considerations

• Ambient room temperature always above 32°F (0°C) to

prevent the potential of freezing.

• Drainage of water (or water/ antifreeze solution) during

boiler service or from safety relief valve discharge.

• Access to system water piping, gas supply, and

electrical service.

• 

capable of supporting the weight of the boiler, water,

and equipment.

• 

wet.

3 - LOCATING THE BOILER

Items to Avoid Products Which May Contain These

Items Areas Where These Items May Be

Found

Chlorine, Fluorine, and Compounds



Chlorinated waxes/cleaners

Chlorine-based swimming pool chemicals

Calcium chloride used for thawing

Sodium chloride used for water softening

Swimming pool or spa chemicals

De-icing salts or chemicals

Carbon Tetrachloride

Swimming pools and pool storage areas





Airborne Particulates

Drywall dust

Road or gravel dust

Dryer lint

Cat litter





Acids, Solvents, etc.

Paint, Varnish, Turpentine, etc.

Cleaning Solvents

Hydrochloric acid/muriatic acid

Cements, adhesives and glues

Photo processing plants

Garages with workshops



establishments

Laundry Chemicals

Laundry detergents, bleaches, fabric

softeners, etc.

Antistatic fabric softeners (dryer sheets)

Dry cleaning/laundry areas and

establishments

Other

Permanent wave solutions

Refrigerants (Freon, etc) (only where

the refrigerant may be leaking from the

appliance)

Beauty shops

Refrigeration repair shops

Notes:





passages possibly resulting in unsafe operation. In this case, unit servicing shall include





the room be generously ventilated (well in excess of combustible air requirements), and

homeowner seal laundry supply containers, and minimize room vapors.

. Piping allowing fresh air in should also be considered. See Section 5-1.

Table 3-1: CONTAMINANTS

• Horizontal run to chimney shall be as short as possible.

• System piping exposed to freezing conditions: Use



manufacturer for use with closed water heating system.

Do not use automotive or ethylene glycol.

PN 240013345 Rev. B [10/01/2021]

4 - CONNECTING SUPPLY AND RETURN PIPING

RELIEF VALVE

DISCHARGE

LINE

Check local

codes for

maximum

distance

from oor

or allowable

safe point of

discharge.

Figure 2 - Safety Relief Valve

Refer to local codes and appropriate ASME Boiler

and Pressure Vessel Code for additional installation

requirements. Install safety relief valve using pipe



Install safety relief valve with spindle in vertical

position.



relief valve.

Install discharge piping from safety relief valve. See

Figure 2.

• Use ¾” or larger pipe.

• Use pipe suitable for temperatures of 375°F (191°C)

or greater.

• Individual boiler discharge piping shall be independent

of other discharge piping.

• Size and arrange discharge piping to avoid reducing

safety relief valve relieving capacity below minimum

relief valve capacity stated on rating plate.

• Run pipe as short and straight as possible to location

protecting user from scalding and properly drain

piping.

• Install union, if used, close to safety relief valve outlet.

• Install elbow(s), if used, close to safety relief valve

outlet and downstream of union (if used).

• Terminate pipe with plain end (not threaded).

• Terminate freely to atmosphere where discharge is

clearly visible and no risk of freezing.

WARNING

Burn and scald hazard. Safety relief valve could

discharge steam or hot water during operation.

Install discharge piping per these instructions.

WARNING

Burn and scald hazard. Safety relief valve shall be

installed with spindle in upright position only,

following ASME BPV code. Failure to follow these

instructions could result in death or serious injury.

PN 240013345 Rev. B [10/01/2021]

4.3 Flush and Rinse System

Flush the entire system and rinse thoroughly to ensure no

sludge will be introduced into the heating body of the boiler.

NOTICE

If damage due to frozen pipes is a possibility, install

appropriate safeguards and alarms on the heating

system to prevent property damage due to frozen

and burst pipes should the boiler heating system

become inoperative due to a power outage, safety

lockout or component failure.

4.4 Water Treatment

Manufacturer recommends a water analysis be done on



based on the analysis results. For extremely hard water or

pH below 7.0 consult your local water treatment company.

Manufacturer recommends a water analysis be done on



based on the analysis results.

For extremely hard water or pH below 7.0 consult your

local water treatment company.

• If CH water is very hard or full of impurities, it must be



or malfunction could be caused. Recommended water

quality is

o Hardness Less than 150 mg/L

o Acidity level 7-8 pH

o Sediments Particle size less than 50 micron

• If the water quality is outside these ranges, consult a local

water treatment specialist for recommendations.

• If the water is treated, do not use petroleum based

products or products containing mineral oil or hydrocarbons

in order to avoid likely damage to parts made from rubber

compounds (o-rings).

4 - CONNECTING SUPPLY AND RETURN PIPING

WARNING

• Poison hazard. Ethylene glycol is toxic. Do not

use ethylene glycol.

• Never use automotive or standard glycol

antifreeze, even ethylene glycol made for hydronic

systems.

• Ethylene glycol can attack gaskets and seals used

in hydronic systems.

• Do not use petroleum based cleaning or sealing

compounds boiler system.

• 

water.

• Use only inhibited propylene glycol solutions



use with closed water heating system.

• 

glycol before installing new Boiler.

• Provide user with Material Safety Data Sheet



PN 240013345 Rev. B [10/01/2021]

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