GE GN75ENSRSA User manual

1
49-50230-1 03-08 JR
Installation Outdoor Tankless Water Heater
Instructions Models GN75ENSRSA, GN94ENSRSA, GP94ENSRSA
Questions? Call 888-HOTWTER (888.468.9837) or Visit our website at ge.com
BEFORE BEGINNING INSTA ATION
Read these instructions completely and carefully.
•IMPORTANT —Save these instructions
for local inspector’s use.
•IMPORTANT —Observe all governing
codes and ordinances.
•Note to Installer – Be sure to leave these
instructions with the Consumer.
•Note to Consumer – eep these instructions
for future reference.
• Proper installation is the responsibility of the
installer.
• Product failure due to improper installation
is not covered under the Warranty.
Recognize this symbol as an indication of
Important Safety Information!
WARNING: Read entire manual. Failure to follow all guides and rules could cause personal
injury or property damage.
• Check with your state and/or local public works department for plumbing codes. You must follow their
guides as you install the Water Heater.
NOTE: Failure to comply with these installation instructions will void the product warranty, and the
installer will be responsible for any service, repair or damages caused thereby.
SAFETY PRECAUTIONS
WARNING: If the information in these
instructions is not followed exactly, a fire or explosion
may result, causing property damage, personal injury
or death.
FOR YOUR SAFETY!
– Do not store or use gasoline or other
flammable vapors or liquids or other
combustible materials in the vicinity of this or
any other appliance. To do so may result in an
explosion or fire.
– WHAT TO DO IF YOU SME 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 fire department.
• Do not return to your home until authorized
by the gas supplier or fire department.
– Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or death. Refer to
this manual. Installation and service must
be performed by a qualified installer, service
agency or the gas supplier.
• Service information and wiring diagram are
located behind front panel.
• Service must be performed by a qualified
service agency.
• This appliance must be properly grounded and
installed as described in these instructions
.
FOR OUTDOOR APPLICATIONS ONLY

Installation Instructions
2
SAFETY PRECAUTIONS (cont.)
WARNING: Gasoline, as well
as other flammable materials and liquids
(adhesives, solvents, paint thinners, etc.) and
the vapors they produce, are extremely
dangerous. DO NOT handle, use or store gasoline
or other flammable or combustible materials
anywhere near or in the vicinity of a water
heater or any other appliance. Be sure to read
and follow the labels on the water heater, as well
as the warnings printed in this manual. Failure
to do so can result in property damage, bodily
injury or death.
WARNING: Do not use substitute
materials. Use only parts certified with the
appliance.
• This appliance must be installed, inspected and
leak tested by a state- and city-qualified licensed
contractor. It is the responsibility of the person
having the water heater installed to ensure the
installing contractor has proper licenses and
permits for installing water heaters in your
location. GE highly recommends that installers
attend a product knowledge class to ensure
customer satisfaction and warranty coverage.
Failure to comply with state and local codes
pertaining to water heater installations may
void the warranty.
• This appliance is not to be installed indoors.
• The installation must conform with local codes or,
in the absence of local codes, with the National
Fuel Gas Co e, ANSI Z223.1/NFPA 54, or the
Natural Gas an Propane Installation Co e,
CSA B149.1.
• The appliance and its appliance main gas valve
must be disconnected from the gas supply piping
system during any pressure testing of that
system at test pressures in excess of 1/2 psi
(3.5 kPa) (13.84 in W.C.).
SAFETY PRECAUTIONS (cont.)
• The appliance must be isolated from the gas
supply piping system by closing its individual
manual shut-off valve during any pressure
testing of the gas supply piping system at test
pressures equal to or less than 1/2 psi (3.5 kPa)
(13.84 in W.C.).
• The appliance should be located in an area
where water leakage of the unit or connections
will not result in damage to the area adjacent
to the appliance or lower floors of the structure.
When such locations cannot be avoided,
it is recommended that a suitable drain pan,
adequately drained, be installed under the
appliance. The pan must not restrict combustion
airflow.
• The flow of combustion and ventilation air shall
not be obstructed.
• This appliance is not suitable for use in an
application such as a pool or spa heater that
uses chemically treated water. (This appliance is
suitable for filling large or whirlpool bath tubs
with potable water.)
• If a water heater is installed in a closed-water
supply system, such as one having a backflow
preventer in the cold water supply line, means
shall be provided to control thermal expansion.
Contact the water supplier or local plumbing
inspector on how to control this situation.
• Should overheating occur or the gas supply fail
to shut off, turn off the manual gas control valve
to the appliance.
• eep the air intake location free of chemicals,
such as chlorine or bleach, that produce fumes.
These fumes can damage components and
reduce the life of your appliance.
CAUTION: DO NOT operate the water
heater if any part of the appliance has been under
water.
CAUTION: BURN HAZARD. Hot exhaust
and vent may cause serious burns. eep back from
water heater unit. eep small children and animals
away from unit.
CAUTION: Hot Water outlet pipes leaving
unit can be hot to touch. Insulation must be used
for hot water pipes below 36″due to burn risk to
children.
WARNING: This unit is not intended
or qualified for use in manufactured homes, mobile
homes or recreational vehicles.
DANGER
Read and follow water heater warnings and
instructions. If owner’s manual is missing, contact
the retailer or manufacturer.

3
Installation Instructions
TOO S YOU WI NEED
• Pipe Wrenches (2) • Gloves
• Adjustable Pliers • Safety Glasses
• Screwdrivers (2)
• Wire Cutters
MATERIA S YOU WI NEED TO SUPP Y
• Soap Solution • 3/4″Pipe Fittings
• Pipe Compound Required:
• 5/8″ID PVC Flexible – Unions
Tubing – Ball Valves
• 2 Conductor 22 AWG – Drain Valves
Wire for Remote – Pressure Relief Valve
Control
• Single Gang Electrical Box
• Wire Nuts
• Outdoor Rated Switch and Enclosure
• Concrete Wall Anchors (Optional)
Your installation components may vary.
PARTS PROVIDED
Locate the parts packed with the Water Heater.
Gas Valve
3/4″FNPT Ball Valve
4 #10 x 11⁄4″
Wood Screws
OTHER TOO S THAT MIGHT BE REQUIRED
• Hammer Drill with Concrete Bits
• Saw
• Threading Machine with Heads and Oiler
• Core Drill with Diamond Head
• Torch Set
• Copper Tubing Cutter
• Steel Pipe Cutter
OTHER MATERIA S THAT MIGHT BE NEEDED
• Heat Tape
• Pipe Insulation
• Electrical Wire and Conduit per Local Code
• Air Inlet Screen
• Optional Pipe Cover AGTPCM
• Optional Additional Remote Controller AGTRC1
Remote
Control

DIMENSIONS
GN75/GN94/GP94ENSRSA
DIM. DESCRIPTION IN. (MM)
A Width 14 (355.6)
B Depth 913⁄16 (249.5)
C Height – Unit 227⁄8(582)
D Height – with brackets 253⁄8(646.4)
E Hot Water Outlet – from wall 313⁄16 (96)
F Hot Water Outlet – from center 45⁄16 (110)
G Cold Water Inlet – from wall 3 (75)
H Cold Water Inlet – from center 11⁄8(27)
I Gas Connection – from wall 41⁄8(104)
J Gas Connection – from center 31⁄2(89)
From base to gas connection 15⁄8(40)
From base to cold connection 2 (50)
From base to hot connection 15⁄8(41)
L From bottom of unit to bottom of exhaust 193⁄4(501.65)
4
Installation Instructions
A
CD
K
B
EH
FJ
GI
L

5
Installation Instructions
F UE TERMINA C EARANCES
U.S. INSTA ATIONS
C EARANCES PER
REF DESCRIPTION ANSI Z21.10.3
A Clearance above grade, veranda, porch, deck or snowline 36 inches (91 cm)
B Clearance to window or door that may be opened 12 inches (30 cm)
C Clearance to permanently closed window *
D Vertical clearance to ventilated soffit, located above the terminal *
within a horizontal distance of 2 feet (61 cm) from the center line
of the terminal
E Clearance to unventilated soffit *
F Clearance to outside corner *
G Clearance to inside corner *
H Clearance to each side of center line extended above meter/regulator *
assembly
I Clearance to service regulator vent outlet *
J Clearance to nonmechanical air supply inlet to building or 12 inches (30 cm)
the combustion air inlet to any other appliance
Clearance to a mechanical air supply inlet 3 feet (91 cm) above
if within 10 feet
(3 m) horizontally
L Clearance above paved sidewalk or paved driveway located *
on public property1
M Clearance under veranda, porch, deck or balcony2*
*For clearances not specified in ANSI Z223.1/NFPA 54, clearances are in accordance with local installation codes and the requirements of the gas
supplier. Clearance to opposite wall is 24 inches (60 cm).
1 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both
dwellings.
2 Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

6
Installation Instructions
F UE TERMINA C EARANCES (ANSI Z21.10.3 • CSA 4.3)
FIXED
CLOSED
OPERABLE
FIXED
CLOSED
OPERABLE
B
B
B
A
J
B
I
M
C
F
B
B
E
D
L
G
A
H
K
VENT TERMINAL
AIR SUPPLY INLET
AREA WHERE
TERMINAL IS NOT
PERMITTED
ADDITIONA C EARANCES – VENT TERMINA
Local codes supersede
these clearances.
• Avoid termination
locations near a
dryer vent.
• Avoid termination
locations near
commercial cooking
exhaust.
2"
36"
12"
INSIDE
CORNER
*
(0.30 m) to an
inside corner
(50 mm) between terminals at same level
(0.91 m) to ventilated or unventilated soffit or eave vent; or
to a deck or porch

Installation Instructions
7
P ANNING FOR P UMBING
(shown with optional pipe cover)
The center of the pipes can be placed anywhere
within the shaded area. The center of the pipes
is recommended to be protruding only within 6″
of the mounting wall. Other specific installations
may be different.
Be sure that the minimum elevation of the bottom
of the unit is 18″to meet the 36″recommended
clearance for the exhaust.
CAUTION: BURN HAZARD. Hot exhaust and
vent may cause serious burns. eep back from water
heater unit. eep small children and animals away
from unit.
CAUTION: Hot Water outlet pipes leaving unit
can be hot to touch. Insulation must be used for hot
water pipes below 36″due to burn risk to children.
NOTE: It is recommended to install the bottom
of the unit at least 18″off the ground to minimize
blockage and maintenance from debris and provide
room for the optional Pipe Cover Accessory Model
Number AGTPCM.
NOTE: Do not install electrical outlet directly
below unit. Electrical outlet must be installed
less than 6 feet from unit.
36″min.
Water and gas
through the wall *
Unit
12″
21⁄2″
21⁄2″
21⁄2″
41⁄2″
61⁄2
″
18″min.
Ground
7″
9″
33⁄8″
97⁄8
″
Optional Pipe Cover (AGTPCM)
shown shaded.
Pipe cover not required, However,
consideration should be taken in the
design of the rough plumbing to allow
installation of unit and pipe cover
*Suggested area for Water and Gas lines to come
through the wall to allow the optional pipe cover
to be installed if desired.

Installation Instructions
8
MOUNTING THE WATER HEATER (cont.)
Identify the installation location and confirm
that the installation will meet all required
clearances. Use mounting template to locate
screw or anchor locations.
Securely attach the water heater to the wall
using the brackets located at the top and
bottom of the water heater.
Ensure that the attachment strength
is sufficient to support the weight. Refer
to the weight of the water heater in
the Specification Gui elines. Four mounting
screws with 200 lb tensile load capacity are
required at a minimum.
ON WOOD OR SIDING: When attaching
the unit to wood or siding, mount 2 boards
suitable for anchoring to wall studs, between
the studs. You can do this before the wall has
been finished.
NOTE: Do not hang the unit on wood or
siding only. The unit must be secured to
studs.
NOTE: Screws provided must fasten securely and
directly into wood. If screws go through siding or
insulation and do not fully engage, installer must
supply correct screws.
4
3
2
1
Wall installation
brackets
C EARANCES FOR WATER HEATER
COMBUSTIB E MATERIA : As pertaining
to materials adjacent to or in contact with
heat-producing appliances, vent connectors, gas
vents, chimneys, steam and hot water pipes and
warm air ducts, shall mean materials made of or
surfaced with wood, compressed paper, plant fibers
or other materials that are capable of being ignited
and burned. Such material shall be considered
combustible even though flame-proofed,
fire-retardant treated or plastered.
To front
To top
To side
To floor/ground
To combustibles To noncombustibles
Top of heater 12 inches (305 mm) 2 inches (51 mm)
Back of heater 0 (zero) 0 (zero)
Front of heater 24 inches (610 mm) 24 inches (610 mm)
Sides of heater 6 inches (152 mm) 1/8 inch (3 mm)
Floor/ground 12 inches (305 mm) 2 inches (51 mm)
243⁄4″
CORROSIVE ATMOSPHERES
NOTICE: The water heater or intake air supply
should not be installed near an air supply
containing halogenated hydrocarbons
or near swimming pool chemicals.
MOUNTING THE WATER HEATER
CAUTION: Reinforcement of the
wall is required in case the wall is not strong
enough to hold the water heater. Do not mount
to drywall unless mounting screws are secured
in wall studs.
Make sure the location of the water heater allows
for easy access and operation.
Wall studs should be utilized when mounting the
water heater to the wall. On masonry or concrete
wall, use concrete anchors or lag bolts.

MOUNTING THE WATER HEATER (cont.)
ON MASONRY OR CEMENT WA : Mount
4 wall anchors (not supplied) suitable to
carry 200 lbs minimum tensile load each.
Level the unit during installation.
IMPORTANT: Anchors suitable for masonry or
concrete are to be supplied by the installer.
Installation Instructions
9

GAS PIPING (cont.)
PIPE SIZING PROCEDURE
The gas supply to the home must be capable
of handling the entire gas load of the home,
calculated by adding the BTU rating of each gas
appliance in the home. State and local codes must
be met, as well as utility requirements, to ensure
gas supply to the unit is adequate to meet the
rated demand. Use the charts below as a guide to
size the pipe from the utility meter to the tankless
water heater. Gas line sizing is based on gas type,
the pressure drop in the system, the gas pressure
supplied and the gas line type. Refer to the National
Fuel Gas Co e, NFPA 54, and/or your local gas
provider, for proper gas line sizing.
1
10
Installation Instructions
GAS PIPING
GENERA INSTRUCTIONS
• Make sure gas supply is off prior to making
any connections to the water heater. A manual
gas control valve, provided with this water
heater, must be placed in the gas supply line
to the water heater. A union can be used on
the connection above the shut-off valve for
the future servicing or disconnection of the unit.
• Check the type of gas and the gas inlet pressure
before connecting the water heater. If the water
heater is not of the gas type that the building is
supplied with, DO NOT connect the water heater.
Contact the dealer for the proper unit to match
the gas type.
• Check the gas supply pressure immediately
upstream at a location provided by the gas
company. Supplied gas pressure must be within
the limits shown in the Specifications section.
• Before placing the appliance in operation, all
joints, including the heater, must be checked for
gas tightness by means of leak detector solution,
soap and water or an equivalent nonflammable
solution, as applicable. (Since some leak test
solutions, including soap and water, may cause
corrosion or stress cracking, the piping shall
be rinsed with water after testing, unless it has
been determined that the leak test solution is
noncorrosive.)
• Always use approved connectors to connect the
unit to the gas line. Always purge the gas line of
any debris before connection to the water heater.
• The gas supply line shall be gas tight, sized
and so installed as to provide a supply of gas
sufficient to meet the maximum demand of the
heater and all other gas-consuming appliances
at the location without loss of pressure.
• Any compound used on the threaded joint of
the gas piping shall be a type which resists the
action of liquefied petroleum gas (propane/LPG).
•Refer to an approved pipe sizing chart
if in doubt about the size of the gas line.
1
CONNECTING THE WATER HEATER TO GAS AND WATER
PIPE SIZING TAB E – NATURA GAS
cubic feet per hour Schedule 40 Metallic Pipe
Inlet Pressure: less than 2 psi (55 inches W.C.)
Pressure Drop: 0.3 inches W.C.
Specific Gravity: 0.60
PIPE SIZE (INCHES)
ength 3/4 11
1/411/2
10 273 514 1060 1580
20 188 353 726 1090
30 151 284 583 873
40 129 243 499 747
50 114 215 442 662
60 104 195 400 600
70 95 179 368 552
80 89 167 343 514
90 83 157 322 482
100 79 148 304 455
125 70 131 269 403
150 63 119 244 366
175 58 109 224 336
200 54 102 209 313
PIPE SIZING TAB E – PROPANE GAS
cubic feet per hour Schedule 40 Metallic Pipe
Inlet Pressure: 11.0 inches W.C.
Pressure Drop: 0.5 inches W.C.
Specific Gravity: 1.50
PIPE SIZE (INCHES)
ength 1/2 3/4 11
1/4
10 291 608 1150 2350
20 200 418 787 1620
30 160 336 632 1300
40 137 287 541 1110
50 122 255 480 985
60 110 231 434 892
80 101 212 400 821
100 94 197 372 763
125 89 185 349 716
150 84 175 330 677
175 74 155 292 600
200 67 140 265 543