Eternal GU145 Series, GU195 Series, Model GU145 (S), Model GU195 (S), Model GU195 (M) Installation & Operation Manual

Service Information Center:

Call us rst if you have any questions with this product. We can help you with questions about assembly
and Water Heater operation or if there are any damaged or missing parts when you unpack this unit from the
shipping box. Please call before returning to the store.

1-866-946-1096

8am-4pm CST, Monday through Friday

157140081P Date 2013/2/4

Installation ● Operation Manual

Natural Gas (NG) - Factory Default
Liquid Propane Gas (LPG) - Optional Orice

Model GU145 (S) / 508(11,12,21,22)1145 (S)
Model GU195 (S) / 508(11,12,21,22)1195 (S)
Model GU195 (M) /

508(11,12,21,22)1195 (M)

California Proposition 65 lists chemical substances known to the state to cause cancer, birth defects, death,
serious illness or other reproductive harm. This product may contain such substances, be their origin from fuel
combustion (gas, oil) or components of the product itself.

WARNING

! !

Read this Operator's Manual carefully and be sure your Water Heater is properly assembled, installed and
maintained. Failure to follow these instructions exactly could result in re, explosion, serious bodily injury and/or
property damage.
Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.

WARNING

! !

IMPORTANT:

●

Only specially trained and authorized personnel are permitted to service this water heater.

●

NOTE TO ASSEMBLER / INSTALLER:

Leave this manual with the consumer.

●

NOTE TO CONSUMER:

Keep this manual for future reference.

●

RECORD YOUR SERIAL #________________

(see silver CSA label on Gas Water Heater)

C

Only a licensed professional can install Eternal units for safety and code compliance. Venting and plumbing
codes can vary by location. Installation instructions and all applicable codes must be followed or property
damage, severe injury, or death may result. Failure to use a licensed plumber or contractor, follow venting,
plumbing, and building codes; or follow installation instructions may be unlawful and will void the product
warranty. Grand Hall is not responsible for any costs incurred for repairing any problems resulting from failure to
follow installation instructions or applicable codes.

WARNING

! !

1

2

Table of Contents

Included & Optional Accessories P3
Specifications P4

Dimensions P5

Parts & Service Parts List P6~10

Pre-Installation Instructions for Your Safety P11

Installation Preparation P12

Condensate Disposal P13

Indoor & Outdoor Installation P14~15

Mobile Home Installation & EC Adapter Installation P16

Wall & Floor Mounting P17~18

Venting Intake & Exhaust Material P19

Venting Specification P20

Vertical & Horizontal Termination P21~22

Clearance Requirements from Vent Terminations to Building Openings P23

Multiple Units Termination P24

Common Venting Installation

mon Vent Installation

P25

Concentric Vent Kit & Outdoor Vent Kit Installation P26

Vent Pipe Installation & Terminator Position P27

Gas Supply Piping P28

LP Conversion P29

Water Supply Connection P30

Condensate Piping

P31

Temperature and Pressure Relief Valve &

IPC For Recirculation Application

P32

Electrical Connection P33

Optional Remote Controller Installation P34~35

MCU Installation P36~38

Plumbing Diagrams P39~41

Recovery Pump & Water Pipe Size

P42

Operating Instructions P43

How To Use The Front Control Interface P44

How To Use the Remote Controller &

Ignition Cycle Counter

P45

Maintenance and Service P46

"D" button Diagnostic Function

P47

Diagnostics P48~50

How To Check Gas Combustion

P51~52

Wiring and Connection Diagram P53~54

Grand Hall Limited Warranty P55~57

Intake Orifice 32
(for NG application
installing at elevation

over 3,000 ft)

Item Description

Qty

273

Eternal Hybrid
Condensing

Water Heater

Operating and
Installation Manual
Registration Card

151140066151140067

T&P Relief Valve

Drain Valve
Assembly

Mesh Screen

1

1

1

1

2

190006019

1

P/N

Item Description

QtyP/N

Propane Gas Label

1

1

Outdoor Venting
Cap

Concentric Kit

Horizontal
Terminator 3"

1

508111145(S)

157140081

157140188

314070066

194140151

305070273

151140097

157010126

Item Description QtyP/N Item Description QtyP/N

314070282

ECHCVT02

151140130

GU145(S)
GU195(S)

Eternal Condensate

ECHNK02

Neutralizer Kit

GU195(M)

508111195(S)
508111195(M)

1

Remote Controller
Kit

314070039

1

1

ECHNR02

Eternal Condensate
Neutralizer Refill

Mounting Bracket x2pcs

Wall Bracket x1pcs

1/4"x1

1

2

" screws x6pcs

1

LP Orifice

1

153140223

Mounting Bracket Assembly

1

T-Fitting

195140195

(for condensate line)

1

EC Adapter

312070025

152140230

1

1

195140180

Hole Plug

Water Heater
Stand

314080136

1

3

Included Accessories

Optional Accessories

Self Tapping Screw

5/32" x 5/8" : 2pcs

Philips Head Screw

M8x15 : 4pcs

Stainless Steel Expansion Bolt

: 4pcs

Intake Orifice 32
(for NG application
installing at elevation

over 3,000 ft)

Item Description

Qty

273

Eternal Hybrid
Condensing

Water Heater

Operating and
Installation Manual
Registration Card

151140066151140067

T&P Relief Valve

Drain Valve
Assembly

Mesh Screen

1

1

1

1

2

190006019

1

P/N

Item Description

QtyP/N

Propane Gas Label

508111145(S)

157140081

157140188

314070066

194140151

305070273

151140097

157010126

GU145(S)
GU195(S)
GU195(M)

508111195(S)
508111195(M)

Mounting Bracket x2pcs

Wall Bracket x1pcs

1/4"x1

1

2

" screws x6pcs

1

LP Orifice

1

153140223

Mounting Bracket Assembly

1

T-Fitting

195140195

(for condensate line)

1

EC Adapter

312070025

152140230

1

1

195140180

Hole Plug

4

Eternal Hybrid Water Heater Technical Specications

Model Name

GU145 / GU145(S) GU195(S) / GU195(M)

Thermal Efciency (*) / Energy Factor

98% NG / 99% LP / 0.96 Energy Factor
Installation Indoor / Outdoor / Wall Hung / Floor Standing
Flue System Sealed Combustion Direct Vent / Power Vent Convertible
Vent Run 3" PVC Up to 100ft, 6 Elbows Max, 5ft Deduction Per Elbow

Condensate Discharge Low Fire / Med Fire / High Fire 0.5GPH / 1.1GPH / 1.75GPH
Condensate pH Level 4 pH
Gas Type Pre-set for NG / LP Conversion Kit Included
Unit Connections Gas and Water 3/4" Female NPT

Electricity Dedicated 120VAC, 60Hz w/3 Pronged Power Cord
Gas Input Rate Min / Max 26,000 BTU/Hr / 145,000 BTU/Hr 26,000 BTU/Hr / 195,000 BTU/Hr
Gas Supply Pressure NG / LP 3.5" WC to 10.5" WC / 8" WC to 14" WC
Manifold Pressure

(minimum)

Time engineering

NG (+) 0.1" W.C. NG (+) 0.1" W.C.

Serial # (G902367~G1101155) PG (

+

) 0.1" W.C. PG (+) 0.1" W.C.

Time engineering

Serial #

(G1101156~G1111021)

NG (-) 0.02" W.C. NG (-) 0.02" W.C.
PG (

-

) 0.02" W.C. PG (-) 0.02" W.C.

Honeywell

Serial # (G1111022~)

NG (-) 0.01" W.C. NG (-) 0.01" W.C.
PG (

-

) 0.01" W.C. PG (-) 0.01" W.C.
Ignition System Direct Electronic Ignition w/Automatic Flame Sensing
Burner System Single Orice Premixed Fuel Injection Metal Fiber Infrared
Gas Valve System Dual Stage Negative Pressure Full Modulation Air Ratio
Internal Piping Material Stainless Steel
Reserve Tank 2 Gallons
Electrical Consumption Standby 8W, Max 45W Standby 8W, Max 85W
Maximum Noise Level 40dB (a) 50dB (a)
Remote Controller Up to 3 kits
Multi Unit Capable Up to 2 in manifold, No Built - In MCU / M Option - MCU up to 8 Units
GPM Capacity Range 0.1 to 14.5 GPM 0.1 to 19.5 GPM
Temperature Sensing Tank, Cold Inlet, Hot Outlet, Air Thermistors
Temperature Control

Simulation Feed Forward and Feed Back, Computer Controlled Mixing Valve

Flow Sensing Dual Flow Sensors w/Built-in GPM Monitor

Temperature Settings Range 100°F to 180°F Factory Limited to 140°F in 5°F Steps

Unit Dimensions (WxHxD) 16.9" x 29.1" x 13.8"

Unit Weight 83Ibs / M Option - 85Ibs

Safety Devices T&P Valve, Flame Rod, Thermal Fuse(306°F), Remaining Flame

Detection, Fan RPM Check, Freeze Protection(-40°F), Vent Blockage
Detection, Thermostat Switches(167°F / 194°F), Gas Valve Current
Leak Detection, Ignition Prevention, Dipswitch Temperature Lock, GFCI
w/2 x 5A Fuses.

GU145S and GU195S are for single or dual unit applications with no multi control unit. The GU195M is for
multiple unit applications only and cannot be used for single unit applications.

*

Maximum manifold pressure is indicated on the rating label on right side of the unit.

*

Independent DOE tested.

*

5

Dimensions - GU145(S) / 508(11,12,21,22)1145(S)

GU195(S,M) / 508(11,12,21,22)1195(S,M)

6

Parts Diagram for Model GU145(S) / 508(11,12,21,22)1145(S)

GU195(S,M) / 508(11,12,21,22)1195(S,M)

11

12

5

9

13

6

14

3

4

7

2

10

1

15

8

16

17

18

7

19

30

7

Parts Diagram for Model GU145(S) / 508(11,12,21,22)1145(S)

25

20

31

26

29

22

21

23

24

28

27

8

KEY DESCRIPTION

1 Panel, Front Assembly

2 Panel, Top / Rear Assembly

3 Panel, Rear

4 Panel, Left Assembly

5 Panel, Right Assembly (GU145(S))

6 Panel, Bottom

7 Mounting Bracket

8 Wall Bracket

9 Controller / Front

10 T&P Relief Valve (Cash Acme)

11 Vent Collar

12 Vent Collar Packing

13 Rubber Foot

14 Drain Valve Assembly

15 Main Power Cord

16 Handle

17 Condensing Nipple

18 Mesh Screen

19 Outdoor Venting Cap (Optional)

20 Trap Cleaner Assembly

21 Radial Blower Assembly

22 Gas Valve

23 Air Pressure Switch (GU145(S))

24 Burner Assembly

25 Main Controller (GU145(S))

26 Cold Water Tube Assembly (GU145(S))

27 Hot Water Tube Assembly (GU145(S))

28 Flexible Silencer Kit

29 Mixing Valve

30 EC Adapter

31 Water Pressure Switch

Parts List for Model GU145(S) / 508(11,12,21,22)1145(S)

9

Parts Diagram for Model GU195(S) / 508(11,12,21,22)1195(S)

Parts Diagram for Model GU195(M) / 508(11,12,21,22)1195(M)

20

21

22

23

25

26

31

29

24

28

29

27

25

20

31

26

29

22

21

23

24

28

27

10

Parts List for Model GU195(S,M) / 508(11,12,21,22)1195(S,M)

KEY DESCRIPTION

1 Panel, Front Assembly

2 Panel, Top / Rear Assembly

3 Panel, Rear

4 Panel, Left Assembly

5 Panel, Right Assembly (GU195(S,M))

6 Panel, Bottom

7 Mounting Bracket

8 Wall Bracket

9 Controller / Front

10 T&P Relief Valve (Cash Acme)

11 Vent Collar

12 Vent Collar Packing

13 Rubber Foot

14 Drain Valve Assembly

15 Main Power Cord

16 Handle

17 Condensing Nipple

18 Mesh Screen

19 Outdoor Venting Cap (Optional)

20 Trap Cleaner Assembly

21 Radial Blower Assembly

22 Gas Valve

23 Air Pressure Switch (GU195(S,M))

24 Burner Assembly

25 Main Controller (GU195(S,M))

26 Cold Water Tube Assembly (GU195(S,M))

27 Hot Water Tube Assembly (GU195(S,M))

28 Flexible Silencer Kit

29 Mixing Valve

30 EC Adapter

31 Water Pressure Switch

11

Pre-Installation Instructions for Your Safety

WARNING

If you do not follow these instructions exactly, a re or explosion could result causing property damage, personal
injury or loss of life.

Installation Codes

Before Installation

The installation must conform with local codes or, in the absence of local codes, with National Fuel Gas Code,
ANSI Z223.1/NFPA 54.
Properly ground the unit in accordance with all local codes or in the absence of local codes, with the National
Electrical Codes, ANSI/NFPA 70.

This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner.
Do not try to light the burner by hand.
Smell all around the water heater area for evidence of leaking gas. Be sure to smell next to the oor because LP
gas is heavier than air and will settle on the oor.
Use only your hand to turn the manual gas valve knob. Never use tools. If the knob will not turn by hand, don't try
to repair it. Call a qualied service technician. Force or attempted repair could result in a re or explosion.
Do not use this water heater if any part has been under water. Immediately call a qualied service technician to
inspect the water heater and to replace any damaged parts.

Far away from water heater
In approved containers
Tightly closed
Out of children's reach

Cannot be seen
Vapors are heavier than air
Go a long way on the oor
Can be carried from other rooms to the main burner by air currents

Turn off all electrical power to the water heater if service is to be performed.
Turn the manual gas valve located on the outside of the unit clockwise to the off position.

Vapors from ammable liquids will explode and catch re causing death or severe burns. Do not use or store
ammable products such as gasoline, solvents or adhesives in the same room or area near the water heater.

□

□

□

□

□

□

□

□

□

□

□

□

□

□

□

□

Keep ammable products

Vapors

TO TURN OFF GAS TO WATER HEATER

WARNING

□
□

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.

WARNING

□
□

! !

! !

Use this water heater at your own risk. The set outlet water temperature can cause severe burns instantly
or death from scalds. Test the water before bathing or showering. Do not leave children or the inrm without
supervision.

WARNING

! !

Each eternal is equipped with a computer controlled mixing valve to ensure precise temperature is being
delivered. Modulation noise is normal and should not be concerned.

NOTICE

! !

12

Installation Preparation

Unpack the unit carefully and make sure that all accessories are put aside so they will not be lost.

● Operator's manual ● Warranty Registration Card ● Included Parts
Inspect the water heater for possible shipping damages.

Check the markings of the rating plate on the water heater to be certain the type of gas being furnished
corresponds to what the water heater is equipped for.
Do not connect this water heater to a fuel type not in accordance with the rating plate.

Carefully choose the location for the new heater as placement is a very important consideration for the safety of
the occupants in the building and for the most economical use of the appliance.
Whether replacing an old water heater or putting the water heater in a new location, consider the following critical
points:

Read the Safety guidelines in the beginning of this manual.
The internal computer controlled regulator is preset by the manufacturer and should not be adjusted by user.
Maintain proper space around the unit for servicing. Install the unit so that it can be connected or removed
easily.
The electrical connection requires a means for switching off the power supply.
Avoid installing the unit in an area with high levels of dust, sand, or debris. These particles may clog the air
vent or impair the function of the fan, leading to improper combustion. Regular maintenance is needed.
Do not install the unit where the exhaust vent is pointing into any opening in a building or where the noise may
disturb neighbors.

The location selected should be as close to the vent termination point as possible, and centered within the
water piping system for best hot water delivery. All water heaters can leak. Do not install without adequate
drainage provisions where water flow can cause property damage.
If vented through an outside wall or through the roof using 3" vent piping the total vent run cannot exceed 95
feet with one 90° elbow. If more elbows are required the venting distance must be reduced 5 feet for every 90°
elbow.
Vent piping should slope downward towards the unit. Horizontal runs require adequate support at 3½ feet
intervals and vertical runs supported at 5 feet intervals.
Condensation may be created at times as the combustion gases exit the vent cap. Discoloration of surfaces in
proximity to the vent cap may occur.

□

□

□

□

□

□

Unpacking Your Eternal Water Heater

Additional Safety Instructions

WATER HEATER PLACEMENT

●

●

●

●

●

●

●

●

●

●

WARNING

The appliance should be located in an area where leakage of the tank or connections will not result in damage
to the area adjacent to the appliance or to lower floors of the structure. When such locations cannot be
avoided, it is recommended that a suitable drain pan be installed under the appliance. The pan must not restrict
combustion air ow.
The minimum inlet gas pressure must be within the value specied by the manufacturer and the minimum value
listed is only for the purpose of input adjustment.
If a water heater is installed in a closed water supply system, such as one having a backow preventer in the
cold water supply line and a thermal expansion tank is required, contact the water supplier or local plumbing
inspector on how to control this situation.
The Temperature and Pressure (T&P) relief valve must be certied as meeting the requirement of the Standard
for Relief Valves and Automatic Gas Shut-off Devices for Hot Water Supply Systems ANSI Z21.22/CAN1-

4.4. The valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working
pressure of the water heater (150 psi) and a discharge capacity not less than the water heater input rate as
marked on the rating plate.

□

□

□

□

WARNING

! !

Before Commencing The Installation

Check that it is in accordance with relevant building
and mechanical codes, as well as any local, state or
federal regulations.

!

!

CAUTION

!

!

CAUTION

The drain valve must be tightened by
Hand ONLY, not by tools of any kind.

13

Condensate Disposal

The condensate drain must be lled and unobstructed to allow ow of condensate. The condensate should not
be subjected to conditions where freezing could occur. If the condensate is subjected to freezing or obstruction, it
can leak, resulting in potential water damage to the unit and surrounding area.

The drain line material must be an approved material by the authority having jurisdiction. In absence of such
authority, PVC and CPVC piping must comply with ASTM D1785 or D2846. This pipe must be connected to the
port at the side panel. The end of the pipe should drain to a laundry tub or to a oor drain.

Over time, blockage of the trap by debris may occur; when the condensate cannot be released, the unit will go into
error and will shut down. When this occurs, the trap must be cleaned.

CLEANING OUT THE TRAP

The condensate trap must be lled with water prior to using the water heater.

Fill water down the exhaust collar until water visibly
ow out of condensate drain before rst use.

Eternal water heater will typically produce a condensate that is considered slightly acidic with a Ph content of
approximately 3-4. Install a neutralizing lter if required by authority having jurisdiction (See gure 2).

Direct to drain from the unit.
Drain through neutralizer from the unit.
Drain to laundry tub from the unit, in this case the unit must be above the height of the laundry tub.
When installing a condensate pump, ensure the pump is approved for use with condensing appliance.
The pump should be equipped with an overow switch to prevent property damage from potential condensate
spillage.

1.

2.

3.

4.

CAUTION

Figure 2.

Figure 3.

NOTICE

NOTICE

□

To Remove Trap

1. Gently pull trap body downwards to remove.

2. Remove clip securing trap to the nipple.

! !

! !

! !

Figure 1.

4

1

2

3

1

2

1/2" PVC (SCH40, ASTM-D1785)

or

3/4" CPVC (SDR11, ASTM-D2846)

14

Indoor Installation

Clearances

From top of water heater 12 inches From back of unit 0.6 inch

From front of unit 6 inches (*) From left side of unit (gas piping side) 6 inches

From side wall ue or vent connector in any direction 6 inches From right side of unit 2 inches

GU145(S) / GU195(S,M) can be used as either Power-Vent or Direct-Vent appliance. When used as a Power­Vent appliance, the water heater should be located in an area where enough air is available for proper
combustion and ventilation. Follow the latest edition of ANSI Z223.1 and any of your local codes that are
applicable.
GU145(S) / GU195(S,M) is a Category IV vented appliance and manufacturer's ventilation specifications should
be followed.
In general these requirements specify that if the unit is installed in a confined space, there must be permanent air
supply openings if Eternal isn't installed as Direct-Vent.

When combustion air is supplied directly through an outside wall such as intake louver openings into the dwelling,
each opening should give a minimum free area of one square inch per 15,000 Btu/hour of the total input ratings of
all appliances in the enclosed area.

When combustion air is supplied from inside the building, each opening should give a minimum free area of one
square inch per 3,750 Btu/hour of the total input ratings of all appliances in the enclosed area. These openings
should never be less than 40 sq.in.

The minimum required inside air volume should be 50 cu.ft per every 3,750 Btu/hour.

□

□

□

Combustion Air Supply

Air supply from outside building:

Air supply from inside building:

Minimum Recommended Air Supply To Water Heater as Power-Vent

Model # Water Heater Capacity Outside Air Area Inside Air Area

GU195 (S,M) Max. 195,000 Btu/hour 14 sq.in. 54 sq.in.

GU145 (S) Max. 145,000 Btu/hour 10 sq.in. 40 sq.in.

Model # Water Heater Capacity Minimum Required Air Volume

GU195 (S,M) Max. 195,000 Btu/hour 2649 cu.ft

GU145 (S) Max. 145,000 Btu/hour 1932 cu.ft

Natural gas in high altitude might contain less heating value than typical 1100 BTU/ cuft and therefore can cause
improper air / gas mix leading to improper combustion. For natural gas installations in altitudes above 3,000 feet,
be sure to apply the intake orice (P/N 152140230) provided by manufacturer in the accessory box.

WARNING - high elevation installations

! !

Air Vents

Heater

Air Vents

Heater

*

For accessibility when performing maintenance, 24" clearance in front of the unit it is recommended.

15

Outdoor Installation

Clearances

From top of water heater 24 inches From back of unit 0.6 inch

From front of unit 24 inches From left side of unit (gas piping side) 6 inches

From side wall ue or vent connector in any direction 6 inches From right side of unit 2 inches

If this unit is installed under an overhang, there must be a 24" clearance from the top of the unit to the overhang,
and the surrounding area must be open in front and on the sides of the unit.

For outdoor installation, do not remove the vent cap from the top of the appliance. Locate the water heater in an
open, unroofed area, and maintain the above minimum clearances from combustible materials.

□

Exhaust Ventilation

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

WARNING

! !

Do not install the water heater where water, debris or ammable vapors may get into the ue terminal. This may
cause damage to the water heater.

WARNING

! !

Min. 4ft

Natural gas in high altitude might contain less heating value than typical 1100 BTU/ cuft and therefore can
cause improper air / gas mix leading to improper combustion. For natural gas installations in altitudes above
3,000 feet, be sure to apply the intake orice (P/N 152140230) provided by manufacturer in the accessory box.
Dipswitch setting for high altitude is different to sea level installation, Please call 1-866-946-1096 to speak to a
service technican for proper conguration.

WARNING - high elevation installations

! !

□

□

16

Mobile Home Installation

Read and Review this entire Manual with special emphasis on combustion and ventilation for your safety.
If you do not follow these instructions exactly, a re or explosion could result causing property damage, personal
injury or loss of life.

WARNING

! !

Eternal water heater must be used as a sealed combustion type (Direct Vent) where all the combustion air is
supplied from the outdoors through the air intake and all combusted gas byproduct is vented directly to the outside
by means of the vent termination.

MOBILE HOME (Manufactured Home).

This appliance must be installed in accordance with the Manufactured Home Construction And Safety
Standard,(Title 24, CFR; Part 3280). In addition, install in accordance with the following instructions, the instructions
supplied with the venting termination, local codes, utility company requirements for the installation of water heaters
in manufactured homes (mobile homes). In the absence of such a standard, the water heater should be installed
in accordance with the latest edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and ANSI A119.5/NFPA
501D.

LOCATION for MOBILE HOME (Manufactured Home).

Per code, water heaters must be installed with a sealed combustion design so as to separate the water heater's
combustion and venting system from the interior atmosphere of the manufactured home. In accordance with code ­water heaters must be direct vented. Please refer to direct venting instructions and diagrams on page 21.

Placement of Water Heater: Locate the water heater as desired, make certain the minimum clearances are
maintained. For indoor and outdoor installation follow entire Eternal operation manual, please see section above on
manufactured home and recreational park trailer outdoor installation.

When installing in a garage, the heater's ignition source should be elevated no less the 18" from the oor unless the
ooring is listed as being resistant to the ignition of ammable vapors.

Operations Manual should be attached to the unit after installation.

EC Adapter Installation

□

How to install the EC Adapter

Loosen M10 screw.
Insert the combustion probe.
After test, retighten M10 screw on the EC Adapter
and make sure no leak.

How to test exhaust combustion air

1.

2.

3.

□

EC Adapter

M10 Screw
(Test Hole)

combustion probe

M10 Screw

O Ring

Note: It is not necessary to glue the EC Adaptor into the top of the unit, but when installing PVC vent pipe into EC

Adaptor it is recommended you glue the PVC into the EC Adaptor.

For outdoor installation, please install EC Adapter to check gas setting prior to install outdoor venting cap or
PVC vent pipe.

Note:

17

Wall Mounting

The water heater must be properly supported; if the wall is not strong enough, be sure to reinforce the wall.
The unit must be mounted on a vertical wall and level to the ground.
Wall mount may caused noises and vibration to magnify through the wall; carefully select where to mount the
unit is important. In some cases, oor mount should be considered.

Mounting Steps

1. Install mounting brackets with 6 screws on top and bottom back of the unit.

Select a location on the wall to mount the unit. The included wall bracket has been pre-drilled for easy installation
on standard stud walls. If the framing is not standard or installing on an uneven surface, fasten 3/4" plywood to
the stud wall and then attach the wall bracket.

Hang the unit on the mounted wall bracket and secure bottom of the unit to the wall with included wall anchors
and wall screws.

2.

3.

WARNING

1/4"x1 ½" Screws

! !

Wall Mounting For Commercial Food Service

Per ANSI / NSF-5, the unit must be mounted at least 6" above the oor from the base of the unit.
This mounting clearance provides access for clearing any possible debris or accumulated water seepage that can
occur below the unit.

Philips Head Screws
1/4"x3/8"

Philips Head Screws
1/4"x3/8"

1/4"x1 ½" Screws

6"

□

□

18

Floor Mounting

GU145(S) / GU195(S,M) can be installed standing on combustible floor surface, or on a water heater stand.
Be sure to use a suitable draining pan under the unit if leakage of the tank or connections will resuit in damage to
the area adjacent to the appliance.

Place unit directly on an even surface. Factory installed rubber feet can be adjusted if the surface is slightly uneven.

Secure the unit to the wall with included wall mount bracket. Be sure to install the wall mount bracket to the wall studs.

Per ANSI / NSF-5, floor standing directly on the hard surface is NOT an acceptable installation method. The unit
must be elevated at least 6" off the floor. This mounting clearance provides access for clearing any possible debris
or accumulated water seepage that can occur below the unit. Install the unit on Eternal Water Heater Stand (P/N

314080136) that raises the unit at least 6" above the floor.

□
□

Standing Installation

Floor Standing

Earthquake Proong

Water Heater Stand For Commercial Food Service

6" min

Factory Installed Rubber Feet

If local codes require the water heater to be raised 18" above oor, installing GU145(S) / GU195(S,M) on the
optional Eternal Water Heater Stand (P/N 314080136) will satisfy code. In conjunction, the unit on stand raises
the FVIR compliant igniter and burner at least 18" off the oor. Alternatively, raising the unit at least 6" off the oor
will also satisfy code.

CAUTION

! !

Philips Head Screws
M8x15x4pcs