GE GN75DNSRSA User manual

1
49-50229-1 03-08 JR
Installation Indoor Direct Vent Tankless Water Heater
Instructions Models GN75DNSRSA, GN94DNSRSA, GP94DNSRSA
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 – Keep 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.
• This water heater must be vented outdoors
using approved ducting materials.
• 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 INDOOR APPLICATIONS ONLY

Installation Instructions
2
SAFETY PRECAUTIONS (cont.)
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- or 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 outdoors.
• The installation must conform with local codes or,
in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installation Code,
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.).
• 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.).
• Carefully follow the venting instructions
beginning on page 19 and in the Maintenan e
section in the Owner’s Manual for adequate
combustion and ventilation air.
• 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 to 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.
SAFETY PRECAUTIONS (cont.)
•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.
• Keep the air intake (at the flue terminal external
to the home) 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. ot exhaust
and vent may cause serious burns. Keep back from
water heater unit. Keep small children and animals
away from unit.
CAUTION: ot 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 • Pipe Fittings Required:
• Pipe Compound – Unions
• Approved Venting – Ball Valves
• 5/8″ID PVC Flexible – Drain Valves
Tubing – Pressure Relief Valve
• 2 Conductor 22 AWG Wire for Remote Control
• Single Gang Electrical Box
• Wire Nuts
• Concrete Wall Anchors (Optional)
Your installation components may vary.
PARTS PROVIDED
Locate the parts packed with the Water eater.
Gas Valve 3/4″FNPT Ball Valve
4 #10 x 11⁄4″
Wood Screws
OTHER TOO S THAT MIGHT BE REQUIRED
• ammer Drill with Concrete Bits
• Saw
• Threading Machine with eads and Oiler
• Core Drill with Diamond ead
• Torch Set
• Copper Tubing Cutter
• Steel Pipe Cutter
OTHER MATERIA S THAT MIGHT BE NEEDED
• eat Tape
• Pipe Insulation
• Electrical Wire and Conduit per Local Code
• Air Inlet Screen
• Optional Pipe Cover AGTPCM
• Optional Remote Controller AGTRC1

4
Installation Instructions
DIMENSIONS
*This is the minimum dimension from the wall. The wall bracket is adjustable to allow an additional 1.57 inches (40 mm).
GN75/GN94/GP94DNSRSA
DIM. DESCRIPTION IN. (MM)
A Width 14 (355.6)
B Depth 95⁄8(244.5)*
C eight – Unit 227⁄8(582)
D eight – with brackets 251⁄2(647.7)
E ot Water Outlet – from wall 35⁄8(91)*
F ot Water Outlet – from center 45⁄16 (110)
G Cold Water Inlet – from wall 213⁄16 (70)*
Cold Water Inlet – from center 11⁄8(27)
I Gas Connection – from wall 37⁄8(99)*
J Gas Connection – from center 31⁄2(89)
From base to gas connection 15⁄8(40)
K From base to cold connection 2 (50)
From base to hot connection 15⁄8(41)
A
C
D
K
B
EH
FJ
GI

5
Installation Instructions
P ANNING FOR VENTING
INTAKE/EXHAUST GUIDE INES
Refer to the specific instructions on your vent
product for additional installation requirements.
• This water heater is a direct vent water heater and
therefore is certified and listed with the vent system.
You must use vent components that are certified
and listed with the water heater model. See
approved venting list on page 20.
• Do not combine vent components from different
manufacturers.
• The vent system must vent directly to
the outside of the building and use outside
air for combustion.
• Every vent connection must be accessible for
inspection, cleaning and replacement.
• Avoid dips or sags in horizontal vent runs by
installing supports per the vent manufacturer’s
instructions.
• Support horizontal vent runs every four feet
and all vertical vent runs every six feet or in
accordance with local codes.
• Venting should be as direct as possible with
a minimum number of pipe fittings.
• Vent diameter must not be reduced.
• Do not connect the venting system with
an existing vent or chimney.
• Do not connect vent with the vent pipe of any other
water heater or appliance.
• Vent connections must be firmly pressed together
so that the gaskets form an air-tight seal.
• The vent piece connected to the water heater must
be secured with one self-tapping screw.
• Refer to the vent pipe manufacturer’s instructions
for component assembly instructions.
• It is recommended to install an optional inlet screen
to minimize blockage and maintenance from debris.
See page 20.

F UE TERMINA C EARANCES (ANSI Z21.10.3 • CSA 4.3)
6
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)
CClearance 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 *
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
K 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.

7
Installation Instructions
ADDITIONA C EARANCES – VENT TERMINA
These clearances are applicable to both concentric terminations and nonconcentric vent exhaust terminations.
Local codes supersede these clearances.
• Avoid termination locations near a dryer vent.
• Avoid termination locations near commercial cooking exhaust.

Installation Instructions
8
F UE INSTA ATION – CONDENSATE DRAIN
HORIZONTA TERMINATION WITH VERTICA TERMINATION (condensate collector
A CONDENSATE DRAIN required in all installations)
3 in (75 mm)
minimum

Installation Instructions
9
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 16″to meet the 36″recommended
clearance for the exhaust.
CAUTION: BURN HAZARD. ot exhaust and
vent may cause serious burns. Keep back from water
heater unit. Keep small children and animals away
from unit.
CAUTION: ot 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.
Gas
Water
through
the wall
Un t
Water and Gas
from below
12″
12″
21⁄2″
6″
21⁄2″21⁄2″
41⁄2″
61⁄2″
18″m n.
Floor
7″
97⁄8″
21⁄2″
9″
12″
33⁄8″
Opt onal P pe Cover
(AGTPCM) shown shaded.
P pe cover not requ red,
However, cons derat on
should be taken n
the des gn of the rough
plumb ng to allow
nstallat on of un t
and p pe cover.
Suggested area for
Water and Gas l nes to
come through the wall
so the opt onal p pe
cover can be nstalled,
f des red.

10
Installation Instructions
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.
Identify the installation location and confirm
that the installation will meet all required
clearances. Use mounting template
to locate screw and 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 Spe ifi ation
Guidelines. Four mounting screws with 200 lb.
tensile load capability are required at
a minimum.
3
2
1
Wall nstallat on
brackets
C EARANCES FOR WATER HEATER
WARNING: Combustible
construction refers to adjacent walls and ceiling
and should not be confused with combustible or
flammable products and materials. Combustible
and/or flammable products and materials should
never be stored in the vicinity of this or any gas
appliance.
To front
To top
To s de
To floor/ground
*Every vent connection must be accessible for inspection, cleaning
and replacement.
To combustibles To noncombustibles
Top of heater 6 inches (152 mm) 2 inches (51 mm)
Back of heater 0 (zero) 0 (zero)
Front of heater 6 inches (152 mm) 6 inches (152 mm)
Sides of heater 2 inches (51 mm) 1/8 inch (3 mm)
Floor/ground 12 inches (305 mm) 12 inches (305 mm)
Vent 0 (zero) 0 (zero)
Closet 6 inches (152 mm) 6 inches (152 mm)
from front from front