State GTS-910-NIE Installation Manual

910 / 910 ASME (T-M50/T-M50 ASME)

On-Demand Water Heater Installation Manual and Owner’s Guide

Gas Tankless Water Heater

910 / 910 ASME (T-M50 / T-M50 ASME) Models

Suitableforpotablewaterheatingandspace‐heat ing

*Pleaserefertolocalcodesforspace‐heatingcompliance.

ANSI Z21.10.3

andCSA4.3

HLW

 



WARNING



-Do not store or use gasoline or other flammable 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 electric 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 fire department.

-Installation and service must be performed by a qualified installer, service agency or

*

the gas supplier.

If the information in these



instructions is not followed exactly, a fire or explosion



may result causing property damage, personal injury or death.



For supplying potable hot water

ASME model ONLY

FEATURING

 ENDLESS HOT WATER  ON-DEMAND USAGE  COMPACT, SPACE SAVING  ENERGY CONSERVATION  COMPUTERIZED SAFETY  NO PILOT LIGHT  EASY-LINK SYSTEM

If you have any questions, please call or write to:

500 Tennessee Waltz Parkway Ashland City, TN 37015 Toll Free: 1-877-737-2840

CONTENTS

SPECIFICATIONS

SPECIFICATIONS………………………. INTRODUCTION…………………………

SAFETY GUIDELINES………………....

INSTALLATION………………………….. General………………………………… Included Accessories…….…………… Warning for Installations……………… Outdoor Installation……………………

Indoor Installation…………………......

Direct Intake Vent System…………….

Venting Instructions………………......

Gas Supply / Gas Pipe Sizing……….. Water Connections…………………… Pressure Relief Valve…………………

Electrical Connections……………......

Remote Controller Connection………

Pump Control Connections......……...

Pump Control Mode…………………… Easy-Link System……………………… Multi-Unit System……………………… Initial Operation………… …………….. NORMAL OPERATION………………….

Normal Operation…………………......

Flow…………………………………….. Freeze Protection System…………... Temperature Setting s…………………. Maintenance and Service……………. GENERAL TROUBLESHOOTING…… . . OPERATING SAFETY………………...…

APPLICATIONS………………………......

Re-Circulation……………...................

Dual-Purpose Heating………………... ADDITIONAL CLEARANCES…………… OPTIONAL ITEMS………...…………….. COMPONENTS DIAGRAM……………. PARTS LIST……………………………… OUTPUT TEMPERATURE CHART……

LIMITED WARRANTY……………….......

The manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Natural Gas Input

(Operating Range)

3 5

Propane Input

(Operating Range)

Gas Connection 1” NPT

Water Connections

Water Pressure

9 10

Natural Gas

Inlet Pressure

Propane

Inlet Pressure

Manifold Pressure**

19 20

Weight

Dimensions

22 23

Ignition

24 27 29 30

Electric

30 32 32 33 34

*40 psi or above is recommended for maximum flow. **The Manifold Pressure is the factory setting and

35 38 40 40 41 42 43 44 48 51 51

generally should not need adjustment.

NOTE *All references to the 910 (T-M50) also refer to the

910 ASME (T-M50 ASME) model *Check the rating plate to ensure this product

matches your specifications.

*In accordance with ANSI Z21.10.3,

CO emission does not exceed 400 PPM for normal input.

Supply

Consumption

Min: 15,000 Btu/h

Max: 380,000 Btu/h

Min: 15,000 Btu/h

Max: 380,000 Btu/h

1” NPT

15 - 150 psi * Min. 5.0” WC

Max. 10.5” WC

Min. 8.0” WC

Max. 14.0” WC

Natural: 2.8” WC

Propane: 3.8” WC

102 lbs.

H25.3”×W24.8”×D11.8”

Electric Ignition 120 VAC / 60 Hz

Operation

Standby

FreezeProtection

178 W (1.48A)

16 W (0.13A)

271 W (2.26A)

- 2 -

INTRODUCTION

your

 This manual provides information necessary for the installation, operation, and

maintenance of the water heater.

 The model description is listed on the rating plate which is a ttached to the front cover of

the water heater.

 Please read all installation instructions completely before installing this product.  If you have any problems or questions regarding this equipment, consult with the

manufacturer or its local re

 This equipment is an on-demand, tankless water heater designed to efficiently supply

endless hot water for

 The water heater has two h eat exchangers. The primary and secondary heat exch angers

alternate roles, extending the life of the water heater (see p. 4).

 The principle behind the water heater is simple:

1. A hot water tap is turned on.

2. Water enters the heater.

3. The water flow sensor detects the water flow.

4. The computer automatically ignites the burner.

5. Water circulates through the heat exchanger and then gets hot.

6. The computer will modulate the gas supply valve and water flow to produce the right amount of hot water at the correct temperature.

7. When the tap is turned off, the unit shuts down.

resentative.

needs.

*This diagram illustrates tankless water heater design concepts only and is not accurate to the water heater’s physical

- 3 -

TWO COMBUSTION SECTIONS WITHIN THE 910 (T-M50)

Left combustion section

Right combustion section

The water heater contains two combustion sections. The section that turns on first is whichever section the water heater decides is the primary section. The moment at which the secondary section fires will depend on the total flow rate and set temperature of the water heater:

Flow rate at which the secondary section fires

( GPM )

3.2 100-120

2.9 125,130

2.6 140

2.4 145,150

2.1 155-185

Example: If the set temperature is 120ºF:

＊The section(s) in operation is indicated by the black square(s).

Total Flow < 0.5 GPM (no section turns on)

910 (T-M50) 910 (T-M50) 910 (T-M50) 910 (T-M50)

0.5 GPM ≦ Total Flow < 3.2 GPM

rimary section fires onl

Set temperature of the 910 (T-M5 0 )

(°F)

3.2 GPM < Total Flow

(both primary and

secondary sections fire)

Depending on which side is the primary section

＊The primary and secondary section will reverse roles every 100 firing cycles or every 12 hours of unit operation.

- 4 -

SAFETY GUIDELINES

 Installation and service must be performed by a qualified installer (for

example, a licensed plumber or gas fitter), otherwise the warranty by the manufacturer will be void.

 The installer (licensed professional) is responsible for the correct

WARNING

PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIONS.

installation of the water heater and for compliance with all national, state/provincial, and local codes.

GENERAL

1. Follow all local codes, or in the absence of loca l codes, follow the most recent edition of

the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Code in Canada.

2. Properly ground the unit in accordance with all local code s or in the absence of local codes, with the National Electrical Codes: ANSI/NFPA 70 in the USA or CSA standard C22.1 Canada Electrical Code Part 1 in Canada.

3. Carefully plan where you intend to install the water heater. Please ensure:

 Your water heater will have enough combustible air and

proper ventilation.

 Locate your heater where water leakage will not damage

surrounding areas (please refer to p. 6).

4. Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC RATING.

*If this unit does not match your requirements, do not install and consult with the manufacturer.

5. If any problem should occur, turn off all hot water taps and turn off

the gas. Then call a trained technician or the Gas Company or the manufacturer.

Rating plate

WARNING

 Water temperatures over 125ºF (52ºC) can cause severe burns instantly or death from

scalding. The water temperature is set at 120ºF (49ºC) from the factory to minimize any scalding risk. Before bathing or showering always check the water temperature.

 Do not store or use gasoline or other flammables, vapors, or liquids in the

vicinity of this appliance.

 Do not reverse the water and/or gas connections as this will da mage

the gas valves and can cause severe injury or death. Follow the diagram on p. 18 when installing your water heater:

 Do not use this appliance if any part has been in contact with or been

Prohibited

immersed in water. Immediately call a licensed plumber, a licensed gas fitter, or a professional service technician to inspect and/or service the unit if necessary.

 Do not disconnect the electrical supply if the ambient temperature will drop below

freezing. The Freeze Prevention System only works if t he unit has electrical power. The warranty will not be covered if the heat exchanger is damaged due to freezing. Refer to the section on the Freeze Prevention System on p. 32 for more information.

- 5 -

INSTALLATION

All gas water heaters require careful and correct installation to ensure safe and efficient operation. This manual must be followed exac tly. Read the “Safety Guidelines” section at the beginning of this manual.

 The warranty will not cover damage caused by water quality. Water

hardness that leads to scale formation and/or corrosion may affect/damage the water heater. Hard water scaling and/or corros ion must be avoided or controlled by proper water treatment.

CAUTION

WARNING

 The manufacturer recommends using the direct-vent kit, when the

water heater is installed in a beauty salon. Some chemicals used in a beauty salon may affect the flame sensor. Water heater may not work properly.

 Although this water heater is designed to operate with minimal sound , the

manufacturer does not recommend installing the unit on a wall adjacent to a bedroom, or a room that is intended for quiet study or meditation, etc.

 Locate your heater close to a drain where water leakage will not do dama ge

to surrounding areas. As with any water hea ting applianc e, the potentia l for leakage at some time in the life of the product does exist. The manufacturer will not be responsible for any water damage that may occur. If you install a drain pan under the unit, ensure that it will not restrict the combustion air flow.

 The water heater weighs 102 lbs. Ensure that any and all support

structures (whether it is installed on a wall, on a support stand, etc.) have enough strength to support and hold the water heater.

 When handling the water heater, do not place your hands inside the

flue collar. Injury may result.

 The manufacturer does not recommend installing unit in an attic due

to safety issues. If you install your water heater in an attic:

 Make sure your unit will have enough combustion air and proper

ventilation.

 Keep the area around your water heater clean. When dust collects on

the flame sensor, the water heater will shut down on errors.

 If the above conditions cannot be met, use the direct-vent conversion kit

9007669005 (TM-DV50).

 Locate unit for easy access for service and maintenance.  A drain pan is required to be installed under the water heater in cas e of

leaks.

- 6 -

GENERAL

1. The manifold gas pressure is preset at the factory. It is computer controlled and should not need adjustment.

2. Maintain proper space for servicing. Install the unit so that it can be connected or

removed easily. Refer to p. 9 and p. 10 for proper clearances.

3. The electrical connection requires a means of disconnection, to terminate power to the water heater for servicing and safety purposes.

4. If you will be installing the unit in a contaminated area with a high level of dust, sand, flour, aerosols or other contaminants/chemicals, they can become airborne and enter and build up within the fan and burner causing damage to the unit. In those environments (e.g. residential or commercial laundry facilities, hair salons, pet salons, chemical plants etc.), please purchase the optional direct-vent conversion kit and convert the water heater to a s ealed combustion unit. Direct venting allows the water heater to draw fresh intake air from the ou tside. The warranty will not cover damage caused to the unit due to installation in a contaminated environment that has not been converted using the direct-vent conversion kit.

5. Particles from flour, aerosols, and other contaminants may clog the air vent or reduce the functions of the rotating fan and cause improper burning of the gas. Regularly ensure that the area around the unit is dust- or debris-free; regular maintenance is recommended for these types of environment.

6. Do not install the unit where the exhaust vent is pointing into any opening in a building or where the noise may disturb your neighbors . Make sure the vent termination mee ts the required distance by local code from any doorway or opening to prevent exhaust from entering a building (refer to p. 15).

INCLUDED ACCESSORIES

Check that these items below are included with the water heater.

Items

Manual

Communication Cable

- 7 -

Qty: 1

WARNING FOR INSTALLATIONS

FOR YOUR SAFETY, READ BEFORE INSTALLATION:

Do not install the heater where water, debris or flammable vapors may get into the flue terminal. This may cause damage to the heater and void the warranty.

Do not have the vent terminal pointing toward any opening into a building. Do not locate your heater in a pit or location where gas a nd water can accumulate.

Prohibited Prohibited

Do not install this water heater under an overhang less than 3 feet from its top or eaves. The area under an overhang must be open to three sides.

Do not install the water heater vent terminator within 1 ft. in the USA of any air intake or building opening, and within 3 ft. in Canada of any air intake or building opening. (Refer to p.15)

3 Ft.

Do not install next to a dryer or any source of airborne debris that can be trapped inside the combustion chamber, unless the system is direct vented.

1 Ft.（USA ） 3 Ft.（Canada ）

Takagi

1 Ft.（USA ） 3 Ft.（Canada ）

- 8 -

OUTDOOR INSTALLATION

1. Follow all local codes, or in the absence of local codes, follow the most recent edition of

the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Code in Canada.

2. Install outdoors only in areas with mild, temperate climates.

3. Ensure that the unit is set for outdoor installation. Locate the central computer board.

On the central computer board, locate the lower bank o f dipswitches to the right of the 7-Seg. LED on the computer board. The ‘OUT’ dipswitch on that bank should be switched to its ‘ON’ (up) position (Do not adjust the upper bank of dipswitches).

Upper bank of dipswitches

7-Seg LED

Lower bank of dipswitches

4. The outdoor vent cap must be used when unit is installed outdoor. The manufacturer requires the use of its part No. 9007677005 (TM-VC50).

Make sure power to the unit is turned OFF before changing the dipswitch settings.

The dark square is the direction the dipswitch should be set to.

1 2 3 4 5 6 7 8

TMP1

TMP2

TMP3

MODE

DIRE

OUT

Lower Bank of Dipswitches

P-ALARM

MST

5. When installed outdoors, the water heater shall be wall-mounted or mounted on a stand. Locate the water heater in an open, unroo fed area and maintain the followin g minimum clearances:

There is a 2” clearance from the left and right sides of the unit to combustible and non-combustible

*Side 24”

Top 36”

*Side 24”

surfaces. Howeve r, if any porti on or area of the surface is exposed to the exhaust fumes (i.e. directly to the sides of the vent cap), that surface must be at least 24” away.

Keep the clearances.

Side 2”

Front 4”

(24” Recommended

for Maintenance)

*Front 24”

Bottom 12”

Back 0.5”

Side 2”

- 9 -

INDOOR INSTALLATION

1. Follow all local codes, or in the absence o f

local codes, follow the most recent edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Code in Canada.

2. When installed indoors, the water heater shall be located in an area to maintain the following minimum clearances around the unit:

Keep the clearances.

Combustion Air Supply

The water heater location must provide enough air for proper combustion and ventilation of the surrounding area. See the latest edi tion of ANSI Standard Z22 3.1 or an y a pplicable local codes . In general, these requirements specify that if the unit is install ed in a confi ned space, there mus t be a permanent air supply opening.

Minimum recommended air supply opening size for water heater:

Water heater size

When drawing outside the building

make-up air from

Side 2”

Front 4”

(24” Recommended

for Maintenance)

Top 12”

Back 0.5”

Side 2”

Bottom 12”

When drawing mak e- u p the building (from other rooms within)

air from inside

380 Sq. IN

MAX 380,000 BTU

25.3 Sq. IN

When combustion air is supplied from outside the building, an opening communicating directly with the outside should have a minimum free area of one square inch per 15,000 BTUH input of the total input rating of water heater in the enclosed area.

When combustion air is supplied from inside the building, an opening communicating with the rest of the dwelling should have a minimum free area of one square inch per 1,000 BTUH inpu t of the total input ratin g of water heater in the enclosed area. This opening should never be less than 199 sq. in.

Combustible Air Supplied by Mechanical fan or Make up air device

The water heater is equipped with a combustible air sensor that will shut off the unit when inadequate combustible air supply to unit is detected.

 If a mechanical fan or make up air device is used to supply air to the water heater or

utility room, the installer should make sure it does not create drafts which could cause nuisance shutdowns.

 If a blower is necessary to provide adequate combustion air to the water heater, the

blower and water heater must be set up so that the water heater cannot fire unless the blower is operating. Possible methods include the use o f the water heater internal fan control port or the use of external flow sensors/transmitters and relays.

- 10 -

DIRECT INTAKE VENT SYSTEM

This water heater may be converted to a direct-vent (sealed combustion) appliance by installing an adapter (Part No. 9007669005 (TM-DV50)) which will bring all requir ed combustible air from outside the building. When installing the direct-vent conv ersion kit, p lease follow al l instructions included with the kit.

 The water heater must be installed in a location where the proper amount of combustible

air will be available to it at all times without obstructions.

 If used as a direct-vent appliance, the water h eater requires a 5” combustible air supply

pipe. The intake pipe must be sealed airtight.

 Air supply pipe can be made of ABS, PVC, galvanized steel, corrugated aluminum,

corrugated stainless steel or Category III stainless steel.

 Change the dipswitch settings to the direct-vent system. (See diagram below)  Sidewall venting is recommended for the direct-vent system.  The manufacturer recommends running the exhaust vent and the intake pipe parallel.

Upper bank of dipswitches

Make sure power to the unit is turned OFF before changing the dipswitch settings.

The dark square is the direction the dipswitch should be set to.

1 2 3 4 5 6 7 8

7-Seg LED

TMP1

TMP2

TMP3

MODE

DIRE

OUT

P-ALARM

Lower bank of dipswitches

Lower Bank of Dipswitches

INTAKE

EXHAUST

MST

Direct-Vent Conversion Kit

DIRECT-VE NT CONVERSION KIT

LOUVER COVER PLATES

- 11 -

VENTING INSTRUCTIONS

This water heater must be vented in accordance with the sec tion “Venting of Equipment" o f the latest edition of the Natural Fuel Gas Code: ANSI Z223.1, all applicable loc al building codes, and Section 7 of CAN/CSA B149.1 Natural Gas in Canada, Propane Installation Code in Canada.

WARNING: Improper venting of this appliance can result in excessive levels of carbon monoxide which can result in severe personal injury or death.

EXHAUST VENT

This is a Category III appliance and must be vented accordingly. The vent system must be sealed airtight. All seams and joints without gaskets must be sealed with high heat res istant silicone sealant or UL listed aluminum adhesive tape ha ving a minimum temperature rating of 350 ºF. For best results, a vent system should be as short and straight as possible.

1. This water heater is a Category III appliance and must be vented accordingly with an y 5” vent approved for use with Category III or Special BH type gas vent.

2. The manufacturer recommends the NovaVent line. However, the following are also UL listed manufacturers: ProTech Systems Inc. (FasNSeal), Metal-Fab Inc., and Heat-Fab Inc. (Saf-T Vent).

3. Follow the vent pipe manufacturer’s instructions when installing the vent pipe.

4. Do not common vent this appliance with any other vented appliance. (Do not

terminate vent into a chimney. If the vent must go through the chimney, the vent must run all the way through the chimney with Category III approved or Special BH vent pipe.)

5. The maximum length of exhaust vent piping must not exceed 50 ft. deducting 5 ft. for each elbow used in the venting system. Do not use more than 5 elbows.

Diameter Max. No. of Elbows Max. Vertical or Horizontal Length

*For each elbow added, deduc t 5 ft. from max. vent len gth.

6. When the horizontal vent run exceeds 5 ft., support the vent run at 3 ft. intervals with

overhead hangars.

7. The manufacturer will not be responsible for any damage to the water heater caused by condensation from the vent. For horizontal runs, slope the vent run downwards toward the vent terminal at a rate of ¼” per foot. For horizontal runs that do not slope down ward and for vertical runs, installing a condensate drain is recomme nded. Please refer to p. 14 for the diagrams.

5” 5 Ea. 50 ft

No. of Elbows Max. Vertical or Horizontal Length

0 50 ft. 1 45 ft. 2 40 ft. 5 25 ft.

When installing the vent system, all applicable national and local codes must be followed. If you install thimbles, fire stops or other protective devices and they penetrate any combustible or noncombustible construction, be sure to follow all applicable national and local codes.

- 12 -

VENT TERMINATION

WARNING: Improper installation can cause nausea or asphyxiation, severe injury

or death from carbon monoxide and flue gases poisoning. Improper installation will void product warranty.

 The vent termination provides a means of instal ling vent pipe through the building wall and

must be located in accordance with ANSI Z223.1/NFPA 54, or in Canada with CAN/CSAB149.1 and local applicable codes.

 A proper sidewall vent termination is recommen ded when the w ater heat er is v ented through

a sidewall. If the water heater is converted to a direct-vent unit, a proper sidewall direct-vent termination is to be used.

General rules for venting the water heater are:

1. Place the water heater as close as possible to the vent termination.

2. The vent collar of the water heater must be fastened directly to an unobstructed vent pipe.

3. Do not weld the vent pipe to the water heater collar.

4. Do not cut the vent collar of the unit.

5. The weight of the vent stack must not rest on the water heater.

6. The vent must be easily removable from the top of the water heater for normal service and

inspection of the unit.

7. The water heater vent must not be connected to any other gas appliance or vent stack.

8. Avoid locating the water heater vent termination near any air intake devices. These fans

can pick up the exhaust flue products from the water heater and return them to the building. This can create a health hazard.

9. Avoid using an oversized vent pipe or using extremely long runs of the pipe.

10. Locate the vent termination so that it cannot be blocked by any debris, at any time. Most

codes require that the termination be a t least 12 inche s above grade, but the installer may determine if it should be higher depending on the job site condition and applicable codes.

11. For rooftop venting, a rain cap must be installed.

- 13 -

Horizontal Installation Diagram

Vertical condensation drain (Install according to local codes)

Vent damper (Recommended for freezing weather conditions: 36°F and below)

Vertical Installation Diagram

Vent damper (Recommended for freezing weather conditions: 36°F and below)

Roof

Rain cap

Roof flashing

Vertical condensation drain (Install according to local codes)

Wall

Sidewall vent termination

 Regarding the clearance from the terminal to the air inlet or opening, refer to the next page.  Install a condensation drain in the venting.  Follow the vent manufacturer’s instructions and local codes.  Do not common vent or connect any vent from other appliances to the water heater vent.  Use 5” category III approved or Special BH, single or double wall stainless steel vent pipe.

- 14 -

VENT CLEARANCES

Canada U.S.A

Clearance above gra d e, v era nd a, porch,

deck, or balcony. Clearance to window or door that may be

opened. Clearance to permanently closed window * * *

Vertical clearance to ventilated soffit located above the vent terminator within a

horizontal distance of 2 feet (61cm) from the center line of the terminator. Clearance to unventilated soffit * * *

Clearance to outside corner * * *

Clearance to inside corn e r * * *

Clearance to each side of center line

extended above meter/regulator assembly Clearance to service regu l ator vent outlet. 3 feet * *

Clearance to non-mechanical air supply inlet to building or the combustion air inlet

to any other application. Clearance to mechanical air supply inlet. 6 feet 3 feet 3 feet

Clearance above paved sidewalk or paved driveway located on public

property. Clearance under v er a nda, porch deck, or

balcony. *For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CSA-B149.1, please use clearances in accordance with local ins tallation codes and the requirement of the gas supplier.

Direct vent and

other than Direct

Vent

1 foot 1 foot 1 foot

3 feet 1 foot

* * *

3 feet * *

3 feet 1 foot

7 feet * 7 feet

1 foot * *

Direct vent Other than Direct Vent

4 feet from below or side opening. 1 foot

from above opening.

4 feet from below or side opening. 1 foot

from above opening.

- 15 -

GAS SUPPLY AND GAS PIPE SIZING

1. Turn off all electric power to the water heater if service is to be performed.

2. Turn the manual gas valve located on the outside of the unit clockwise  to the off position.

WARNING: Conversion of this unit from natural gas to propane or vice versa will void all warranty. Contact your local distributor to get the correct unit for your gas type. The manufacturer is not liable for any property and/or personal

damage resulting from gas conversions.

*Check that the type of gas matches the rating plate first.

 The minimum and maximum inlet gas pressures are:

Gas type Inlet gas pressure

Natural Gas Min. 5.0” WC – Max. 10.5” WC

Propane Min. 8.0” WC – Max. 14.0” WC

 Inlet gas pressures that fall outside the range of values listed above may adversely affect the

performance of the water heater. These pressures are measured when the water heater is in full operation.

TO TURN OFF GAS TO APPLIANCE

 Inlet gas pressure must not exceed the above maximum values; gas pressure above the specified

range will cause dangerous operating conditions and da mage to the unit. Ensure that any and all gas regulators used are operating properly and are providing gas pressures within the specified range shown above.

 Until testing of the main gas line supply pressure is completed, ensure the gas line to the water

heater is disconnected to avoid any damage to the water heater.

  

-Gas connections-

1. Install a manual gas shutoff valve between the water heater and the gas supply line.

2. When the gas connections are completed, it is necessary to perform a gas leak test either by

applying soapy water to all gas fittings and observing for bubb les or by using a gas leak detection device.

 The water heater and its individual shutoff valve must be disconnected from the gas supply

piping system during any pressure testing of that system at test pr essures in excess of 1/2 psi (3.5 kPa).

 The water heater must be isolated from the gas supply piping system by closing its individual

manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5kPa).

3. Always purge the gas line of any debris and/or water before connecting to the gas inlet.

NOTICE



Size the gas pipe appropriately to supply the necessary volume of gas required for the water heater using ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 in Canada or local codes. Otherwise, flow capabilities and output temperatures will be limited.

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+ 36 hidden pages