Installation
IndoorDirectVentTanklessWater Heater
Instructions
I [] Questions? Call 888.HOTWTER (888.468.9837) or Visit our website at ge.com I
Models GN75DNSRSA, GN94DNSRSA, GP94DNSRSA
FOR INDOOR APPLICATIONS ONLY
WARNING: Read entire manual. Failure to follow oil 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 gou install the Water Heater.
NOTE: Failure to comply with these installation instructions will void the product warranty, and the
installer will be responsible for ang service, repair or damages caused therebg.
BEFORE BEGINNING INSTALLATION
Read these instructions completely and carefully.
• INPORTANT - Savetheseinstructions
forlocalinspector'suse
•IM PO RTANT -Observeoligoverning
codes and ordinances
• Note to Installer- Be sure to leave these
instructions with the Consumen
• Note to Consumer - Keep these instructions
for future reference.
• Proper installation is the responsibilitg of the
instollen
• Product failure due to improper installation
is not covered under the Worrontg.
_IL Recognize this symbol as on indication
of Important Safety Information!
49-50229-1 03-08 JR
SAFETY PRECAUTIONS
WARNING:,ftheinformationinthese
instructions is not followed exactlg, a fire or explosion
may result, causing property damage, personal injury
or death.
A FOR YOUR SAFETY!
- Do not store or use gasoline or other
flammable vapors or liquids ar other
combustible materials in the vicinity of this
or any other appliance. To do so meg result
in an explosion or fire.
- WHAT TO DO IFYOUSMELLGAS
• Do not try to light ang appliance.
• Do not touch any electrical switch;
do not use any phone in your building.
• Immedietelg 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 propertg
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 agencg.
• This appliance must be properly grounded and
installed as described in these instructions.
1
Installation Instructions
SAFETY PRECAUTIONS (cont.)
WARNING: Donotusesubstitute
materiels. Use onlg ports certified with the
appliance.
• This appliance must be installed, inspected and
leak tested by a state- or city-qualified licensed
contracton 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. GEhighly 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 Notional
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installation Code,
CSA B149.1.
• Theappliance 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
(3.5kPa)(13.84 inW.C.).
• Theappliance 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 (B.5kPa)
(13.84 inW.C.).
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 waten (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:doNOToperate thewater
heater if any part of the appliance has been under
waten
CAUTION: BURN HAZARD. Hot exhaust
and vent may cause serious burns. Keep back from
water heater unit. Keep 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.
• Carefully follow the venting instructions
beginning on page 19 and in the Maintenance
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.
2
Installation Instructions
PARTS PROVIDED
Locate the parts packed with the Water Heater.
GasValve3/4" FNPTBallValve
WoodScrews
TOOLS YOU WILL NEED
• Pipe Wrenches (2)
• Adjustable Pliers
• Screwdrivers (2)
• Wire Cutters
• Gloves
• Safetg Glasses
MATERIALS YOU WILL NEED TO SUPPLY
• Soap Solution
• Pipe Compound
• Approved Venting
• 5/8" ID PVC Flexible
Tubing
• 2 Conductor 22 AWG Wire for Remote Control
• Single Gang Electrical Box
• Wire Nuts
• Concrete Wall Anchors (Optional)
Your instelletion components mog vorg.
• Pipe Fittings Required:
- Unions
- Ball Valves
- Drain Valves
- Pressure Relief Valve
OTHER TOOLS THAT HIGHT BE REQUIRED
• Hammer Drill with Concrete Bits
• Saw
• Threading Hachine with Heads and Oiler
• Core Drill with Diamond Head
• Torch Set
• Copper Tubing Cutter
• Steel Pipe Cutter
OTHERMATERIALSTHAT MIGHT BENEEDED
• Heat Tape
• Pipe Insulation
• Electrical Wire and Conduit per Local Code
• Air Inlet Screen
• Optional Pipe Cover AGTPCI
• Optional Remote Controller AGTRC1
3
DIMENSIONS
Installation Instructions
GN751GN94/GP94DNSRSA
DIM. DESCRIPTION IN. (MM)
A Width 14 (355.6)
B Depth 95/s (244.5)*
C Height - Unit 22;/s (582)
D Height - with brackets 25_/2(647.7)
E Hot Water Outlet - from wall 3% (91)*
F Hot Water Outlet - from center 4%6 (110)
G Cold Water Inlet - from wall 21Y16(70)*
H Cold Water Inlet - from center l_/s (27)
I Gas Connection - from wall 5Ys (99)*
J Gas Connection - from center 5_/2(89)
From base to gas connection 1% (40)
K From base to cold connection 2 (50)
From base to hot connection 1% (41)
*This is the minimum dimension from the wall The wa]l bracket is adjustable to a]low on oddifiona1157 inches (40 mm)
4
PLANNING FOR VENTING
INTAKE/EXHAUST GUIDELINES
Installation Instructions
Refer to the specific instructions on gour vent
product for odditionol installation requirements.
• This water heater is a direct vent water heater and
therefore is certified and listed with the vent sgstem.
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 sgstem must vent directlg to
the outside of the building and use outside
air for combustion.
• Everg vent connection must be accessible for
inspection, cleaning and replacement.
• Avoid dips or sags in horizontal vent runs bg
installing supports per the vent manufacturer's
instructions.
• Support horizontal vent runs everg four feet
and all vertical vent runs everg 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 sgstem with
an existing vent or chimneg.
Do not connect vent with the vent pipe of ang other
water heater or appliance.
Vent connections must be firmlg 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 assemblg instructions.
It is recommended to install an optional inlet screen
to minimize blockage and maintenance from debris.
See page 20.
S
Installation Instructions
FLUE TERMINAL CLEARANCES
U.S.INSTALLATIONS
CLEARANCESPER
REF
A
B
C
D
Clearance above grade, veranda, porch, deck or snowline
Clearance to window or door that mag be opened
Clearance to permanentlg closed window
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
F
G
H
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line extended above meter/regulator
assemblg
Clearance to service regulator vent outlet
Clearance to nonmechanical air supplg inlet to building or
the combustion air inlet to ang other appliance
Clearance to a mechanical air supplg inlet
L Clearance above paved sidewalk or paved drivewag located on public propertg 1
M Clearance under veranda, porch, deck or balcong z *
•For clearances not specified inANSIZ223 1/NFPA54,clearances are in accordance with local installation codes and the _ea
Clearance to opposite wall is24 inches (60 cm}
1Avent shall not terminate direcUgabove a sidewalk or paved driveway that is located between two single familg dwellings and serves both dwellings
2 Permitted onlg if veranda, porch, deck or baicong isfuilg open on a minimum of two sides beneath the floor
DESCRIPTION
ANSI Z21.10.3
36 inches (91 crn)
12 inches (30 cm)
12 inches (30 cm)
3 feet (91 cm} above
if within 10 feet
(3 m} horizontallg
_irernentsof the gas supplier
FLUE TERMINAL CLEARANCES (ANSI Z21.10.3 • CSA 4.3)
A
6
Installation Instructions
ADDITIONAL CLEARANCES - VENT TERMINAL
These clearances are applicable to both concentric terminations and nonconcentric vent exhaust terminations.
Localcodes supersede these clearances.
• Avoid termination locations near a druer vent.
• Avoid termination locations near commercial cooking exhaust.
60" (1.52 m) vertically
between terminals
(0.91 m) to ventilated
or unventilated soffit
or eave vent; or to a
deck or porch
(1.52 m) between
terminals at
different levels
(0.30 m) between
terminals at
same level
.-3
,.j
",.I (0.61 m) to wall or parapet
. I
(0.30 m) between
terminals at same level
7
Installation Instructions
FLUE INSTALLATION - CONDENSATE DRAIN
HORIZONTAL TERMINATION WITH VERTICAL TERMINATION (condensate collector
A CONDENSATE DRAIN required in all installations)
Condensate
Trap
3 in (75 ram)
minimum
(75 mm)
minimum
3 in (75 mm)
_ minimum
8
PLANNING FOR PLUMBING
(shown with optional pipe cover)
Installation Instructions
OptionalPipeCover
(AGTPCM)shownshaded.
Pipecovernotrequired,
Howeve[,consideration
shouldbe takenin
thedesignof the rough
plumbingto allow
installation of unit
andpipecover.
6½
18" rain.
Floor
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
man 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. Hot exhaust and
vent mag cause serious burns. Keep back from water
heater unit. Keep small children and animals away
from unit.
Suggestedareafor
Waterand Gaslinesto
comethroughthewall
so the optionalpipe
covercanbe installed,
if desired
NaterandGas
frombebw
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 Hodel
Number AGTPCH.
NOTE: Do not install electrical outlet directly
below unit. Electrical outlet must be installed
less than 6 feet from unit.
9
Installation Instructions
CLEARANCES 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 ang gas
appliance.
Toside
Tocombustibles Tononcombustibles
Top of heater 6 inches 1152ram) 2 inches 151mini
Back of heater 0 (zero) 0 (zero)
Front of heater 6 inches 1152ram) 6 inches 1152ram)
Sides of heater 2 inches {51 ram) 1/8 inch (3 ram)
Floor/ground 12 inches (305 mm) 12 inches (305 mm)
Vent 0 (zero) 0 (zero)
Closet 6 inches 1152ram) 6 inches 1152ram)
from front from front
*Ever Uvent connection must be accessible for inspection, cleaning
and replacement
MOUNTING THE WATER HEATER
CAUTION: Reinforcementofthe
wall is required in case the wall is not strong
enough to hold the water heater. Do not mount
to drgwall unless mounting screws are secured
in wall studs.
Hake sure the location of the water heater allows
for eosg access end operation.
Wall studs should be utilized when mounting the
water heater to the wall. On masonrg or concrete
wall, use concrete anchors or lag bolts.
[]
Identifg the installation location and confirm
that the installation will meet all required
clearances. Use mounting template
to locate screw and anchor locations.
[]
Securelg 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
Guidelines. Four mounting screws with 200 lb.
tensile load capabilitg are required at
a minimum.
Wallinstallation
brackets
CORROSIVE ATMOSPHERES
NOTICE: The water heater or intake air supplg
should not be installed near an air supplg
containing halogenated hgdrocarbons
or near swimming pool chemicals.
10
Installation Instructions
MOUNTING THE WATER HEATER (cont.)
[] FINISHED WALLS (Drgwell) Option 1:
Mount boards over drgwall directly to studs
in the woll. When attaching the unit to a finished
wall, mount two boards suitable for anchoring
to wall studs. Level the unit during installation.
NOTE: Do not hang the unit on drywall only. The
unit must be secured into wood mounting board.
I
I
243/4,, I _
...... V
i
I i
[
i
I
i
MOUNTING THE WATER HEATER (cont.)
ON MASONRY OR CEMENT WALL: Mount
4 woll onchors (not supplied)in o woll suitoble
to corrg 200 Ibs minimum tensile Iood eoch.
Level the unit during instollotion.
IMPORTANT: Anchors suitoble for mosonrg
or concrete ore to be supplied by the instoller.
FINISHED WALLS (Drgwell) Option 2:
Framed woll with boerds behind the drgwell.
Mount the unit to boerds in the well. Do not use
the screws provided to mount through drywall.
Screws long enough to penetrate the drywall
and provide at least l" of engagement in wood
should be used. Screws should be rated to carry
a tensile load of 200 Ibs each. Level the unit
during installation.
jJ_,<i ¸, I
j
....i_ ! ii
]I O
i i
I :
NOTES:
• Screws provided must fasten securelg
and directly into wood. If screws go through
drywall and do not fully engage the wood stud,
the installer must supply correct screws.
• Do not hang the unit on drywall only. The unit
must be secured into wood mounting board.
11
Installation Instructions
CONNECTING THE WATER HEATER TO GAS AND WATER
[] GAS PIPING
GENERAL INSTRUCTIONS
• Hake sure gas supply is off prior to making
any connections to the water heaten A manual
gas control valve, provided with this water
heater, must be placed in the gas supply line
to the water heaten 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.
[] 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 heaten 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 Notional
Fuel Gas Code, NFPA 5/4,and/or your local gas
provider, for proper gas line sizing.
PIPE SIZING TABLE - NATURAL GAS
cubic feet per hour Schedule40 Metallic Pipe
Inlet Pressure: less than 2 psi (55 inches W.C.}
Pressure Drop: 0.3 inches W.C.
Specific Gravitg: 0.60
PIPE SIZE (INCHES)
Length 3/4 1 11/4 11/2
I0 273 514 1060 1580
20 188 353 726 1090
30 151 284 583 873
40 129 243 499 747
SO 114 215 442 662
60 104 195 400 600
70 95 179 368 552
80 89 167 343 514
90 83 157 322 482
i00 79 148 304 455
125 70 131 269 403
iSO 63 119 244 366
175 58 109 224 336
200 54 102 209 313
PIPE SIZING TABLE - PROPANE GAS
cubic feet per hour Schedule 40 Metallic Pipe
Inlet Pressure: ii.0 inches W.C.
Pressure Drop: 0.5 inches W.C.
Specific Gravitg: 1.50
PIPE SIZE (INCHES)
Length 1/2 3/4 1 11/4
i0 291 608 i150 2350
20 200 418 787 1620
30 160 336 632 1300
40 137 287 541 iii0
50 122 255 480 985
60 ii0 231 434 892
80 101 212 400 821
I00 94 197 372 763
125 89 185 349 716
ISO 84 175 330 677
175 74 155 292 600
200 67 140 265 543
12
Installation Instructions
CONNECTING THE WATER HEATER
TO THE GAS SUPPLY
Connect the gas supply to the system following
state and local plumbing codes. Use the supplied
ball valve at the inlet to the system. Hake sure
the gas supply line to the water heater fits in the
diagram shown on page 9. This is essential if a pipe
cover accessory (model number AGTPCH) is to be
installed.
IMPORTANT: Use a pipe wrench to securely
hold on to the end of the water heater gas inlet
to prevent twisting the inlet.
IMPORTANT: Leave the gas valve off until
instructed to turn it on.
_ _ GasShutOffValveGas Supply
13
Installation Instructions
CONNECTING THE WATER HEATER TO GAS AND WATER (cont.)
[] WATER PIPING
GENERAL INSTRUCTIONS
• The water supplg should be shut off while
connecting the water heaten Make sure the
water inlet and outlet lines to the water heater fit
in the diagram shown on page 9. A manual water
control valve must be placed in the water inlet
connection to the water heater before it is
connected to the water line. Unions can be
used on both the hot and cold water lines for
future servicing and disconnection of the unit.
• The piping (including soldering materials) and
components connected to this appliance must
be approved for use in potable water sgstems.
• Purge the water line to remove all debris and ain
Debris will damage the water heaten
• Toxic chemicals such as those used for boiler
water treatment are not to be introduced to the
potable water used for space heating.
• If the appliance will be used as a potable water
source, it must not be connected to a sgstem
that was previouslg used with a nonpotable
water heating appliance.
• Ensure that the water filter on the water heater
is clean and installed. See the Cleaning the inlet
filter section in the checklist on page 23.
• New plumbing tgpicallg has contamination
in the lines. The inlet water filter should be
cleaned immediatelg after initial use.
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.
[] WATER PIPING (cont.)
PRESSURE RELIEF VALVE (cont.)
• The relief valve must be rated up to 150 psi and
to at least the maximum BTU/hr of the appliance.
• The discharge from the pressure relief valve
should be piped to the ground or into a drain
sgstem to prevent exposure or possible burn
hazards to humans or other plant or animal life.
Follow local codes. Water discharged from the
relief valve could cause severe burns instantlg,
scalds or death.
• The pressure relief valve must be manuallg
operated once a gear to check for correct
operation.
• The relief valve should be added to the hot water
outlet line according to the manufacturer's
instructions. DO NOT place ang other tgpe of
valve or shut-off device between the relief valve
and the water heaten
• Do not plug the relief valve and do not install ang
reducing fittings or other restrictions in the relief
line. The relief line should allow for complete
drainage of the valve and the line.
• If a relief valve discharges periodicallg, this mag
be due to thermal expansion in a closed water
supplg sgstem. Contact the water supplier or
local plumbing inspector on how to correct this
situation. Do not plug the reliefvalve.
• Neither GE nor the American National Standard
{ANSI Z21.10.3)/Canadian Standard {CSA 4.3)
requires a combination temperature and
pressure relief valve for this appliance; however,
local codes mag require a combination
temperature and pressure relief valve.
PRESSURE RELIEF VALVE
• Make sure the pressure relief valve is installed
so there is clearance if the optional pipe cover
(AGTPCM) is installed.
• An approved pressure relief valve is required
bg the American Notional Standard (ANSI
Z21.10.3)/Conadian Standard (CSA 4.3)
for all water heating sgstems.
• The relief valve must complg with the standard
for Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply S_]stems (ANSI
Z2J.22) and/or the standard Temperature,
Pressure, Temperature and Pressure Relief
Valves and Vacuum Relief Valves, CANJ-4.4.
INTERNAL BUILT-IN FREEZER PROTECTION
• The freeze protection features include
electrical heating elements and intermittent firing
of the burnen Freeze protection mag be disabled
if electricitg or gas is not supplied, or if there is
an error preventing the water heater from
functioning.
NOTE: See SUPPLEMENTAL FREEZEPROTECTION
on page 15.
14
Installation Instructions
CONNECTING THE WATER HEATER
TO THE WATER SUPPLY
HotOutlet
Shut OffValve
PressureRelief
Valve ShutOff Valve
Water connections to the tankless water heater
should follow all state and local plumbing codes.
If this is a standard installation, refer to
the diagram on the following page under
RECOHHENDED PIPING FOR BASIC INSTALLATION.
If freeze protection valves are being installed, refer
to the diagram under FREEZEPROTECTION FOR
EXTERNAL PIPING on page 17.
SUPPLEMENTAL FREEZE PROTECTION
If the unit is installed in an environment that can
freeze, follow state and local codes and appl9 heat
trace to ALL water pipe and fittings located outside
{attic, crawl space or building structure).
It is highlg recommended in areas where freezing
temperatures occur to install automatic drain
valves that work in the event of a power loss.
Refer to the diagram in the FREEZEPROTECTION
FOR EXTERNAL PIPING section (page 17). These
valves should be wired to a supplg current.
In the event of a power loss, the sgstem will
drain automaticall9. Be sure to test this sgstem
after installation b9 turning off power to ensure
the sgstem drains properlg.
1. Plumb water suppl9 to the tankless water heater
on the 3/4" HNPT connection at the bottom of
the unit marked WATER INLET.
2. Plumb the home hot water suppl9 to the 3/4"
HNPT connection marked WATEROUTLET
at the bottom of the unit.
NOTE: Hake sure water lines to the water heater fit
in the diagram shown on page 9. This is essential if
a pipe cover accessor U{model number AGTPCH) is
to be installed.
15
Installation Instructions
RECOMMENDED PIPING FOR BASIC INSTALLATION
I_o @ o% j
o o
NOTE:If unitis installedin an
envk0nmentthat canfreeze,fellow
stateandlocalcodesandapply
heattraceto ALLwater@pesand
fittings locatedoutside(attic, crawl
spaceorb@ldisgstructure).
Water Heater
Equipment List QTY
Water Heaters 1
(Optional)
3/4" Fittings Include:
Unions 2
Ball Valves 2
Drain Valves 2
Pressure Relief Valve 1
o o
3/4" Gas Connection
-41
__(_1 3/4" BailValve
I
3/4" Union
3/4" HotWater Supply Line
For Building Fixtures
KEY
Z_ PressureRefisfValve
BoilerDrainValve
Gas Supply
3/4" Cold Water Supply Line
This is not an engineered drawing; it is intended
onlg as a guide and not as a replacement for
professionallg engineered project drawings. This
drawing is not intended to describe a complete
sgstem; it is up to the contractor/engineer to
determine the necessarg components for and
configuration of the particular sgstem being
installed. The drawing does not implg compliance
with local building code requirements; it is the
engineer's/contractor's responsibilitg to ensure
the installation is in accordance with all local
building codes. Confer with local building officials
before installation.
16
Installation Instructions
FREEZE PROTECTION
FOR EXTERNAL PIPING
IMPORTANT!
With electrical power supplied to the water
heater, it will not freeze in environments as
cold as -30°F, when protected from direct wind
exposure.
In the event of a power failure at temperatures
below freezing, the water heater should be
drained of all water to prevent freezing damage.
The unit mag be drained manuallg, or through
the installation of the optional solenoid valves
as shown.
The unit mag be drained manuallg; however, we
highlg recommend that drain-down solenoid valves
be installed that will automaticallg drain the unit if
power is lost.
When the electrical power to the water heater
fails, the 3/4" solenoid valve closes (stopping
the flow of water into the heater) and the 1/4"
solenoid valve opens (allowing the water heater
and associated piping to drain). Ensure that gou
run the drain for the solenoids to the outside
environment to prevent discharging water inside
the building, which can cause water damage.
NOTE: If the unit is installed in an environment that
can freeze, follow state and local codes and applg
heat trace to ALL water pipes and fittings located
outside (attic, crawl space or building structure).
I
Vacuum
_ Breaker
O _,. .... d
Water Heater
0 o
T
Equipment List
Water Heaters
(Optional)
314" Fittings Include;
Unions
Ball Valves
Drain Valves
Pressure Relid Valve
3/4" Gas Connection
Gas Supply
QTY
2
2
2
I(_- 3/4" BallValve
3/4" Union
_..j CheckValve
z_ PressureReliefValve
NOTE:
All pipes and fittings shown
in the dashed boxes should
be located where they will
not freeze, Suggest inside
home or building structure.
KEY
PressureRegulator
I,k_ CkculaBngPump
I_ BoilerBrainValve
[_ SolenoidValve
Minimum 3/4" Hot Water
Supply Line
1/4" Minimum
Normally Open
Solenoid Valve
This is not an engineered drawing; it is intended
onlg as a guide and not as a replacement for
professionallg engineered project drawings. This
drawing is not intended to describe a complete
sgstem; it is up to the contractor/engineer to
determine the necessarg components for and
configuration of the particular sgstem being
installed. The drawing does not implg compliance
with local building code requirements; it is the
engineer's/contractor's responsibilitg to ensure
the installation is in accordance with all local
building codes. Confer with local building officials
before installation.
I,
?-q
3/4" Minimum Minimum 3/4"
Normally Closed Cold Water
Solenoid Valve Supply Line
[]
Route to Floor Drain
17
Installation Instructions
ELECTRICAL CONNECTION
INFORMATION
WARNING - Toreducetherisk
of fire, electricol shock end personel injurg:
• Do not use an extension cord or an adapter plug
with this appliance.
• The water heater must be electricallg grounded
in accordance with local codes and ordinances
or, in the absence of local codes, in accordance
with the NATIONAL ELECTRICALCODE, ANSI/NFPA
NO. 70, or the CANADIAN ELECTRICALCODE,
CSA C22.1.
ELECTRICAL REQUIREMENTS
This appliance must be supplied with 120V, 60Hz,
and connected to a properlg grounded branch
circuit, protected bg a 15- or 20-amp circuit
breaker or time-delag fuse.
If electrical supplg provided does not meet the
above specifications, it is recommended that a
licensed electrician install an approved outlet.
WARNING - This water heater is
equipped with a three-prong (grounding) plug for
gour protection against shock hazard and should
be plugged directlg into a properlg grounded
three-prong receptacle. Do not cut or remove
the grounding terminal from this plug.
f
[| ! I}
@
/i| iI I_
,t !_ /r
ENSURE PROPER GROUND EXISTSBEFORE USE.
DO NOT REMOVE GROUND PRONG.
18
Installation Instructions
VENTING INSTRUCTIONS
Refer to the specific instructions on gour vent
product for odditionol instellation requirements.
CONDENSATE
Regions of cold climate will create more
condensate in the vent sgstem.
Condensate formation can even occur in
high-efficiencg direct vent appliances. To prevent
condensate damage, follow these instructions:
• First remove the black plastic cap, and use 5/8"
ID flexible PVCtubing to drain condensate.
• The condensate trap must contain a minimum
of 3 inches (75 mm) ofwater. See page 8.
• Dispose of condensate per local codes.
• In applications where condensate could freeze,
such as an unconditional attic space, care should
be taken to prevent condensation line freezing.
Refer to state and local codes for proper disposal
of condensate.
-A WARNING: ,fthecondensate
collector is not used, the drain pipe must be
capped to prevent exhaust gases and condensate
from entering the building. The cap is supplied on
the appliance.
-A CAUTIO N: Withoutproperdrainage
or disposal, condensate will damage the heat
exchanger. Condensate collector on the unit
must be properlg connected.
VENTING INSTRUCTIONS (cont.)
MAXIMUM VENT LENGTH
Maximum Sgstem performance is achieved
at a vent length of 21 equivalent feet or less. The
sgstem is capable of 41 equivalent feet vent length
if required, but this reduces sgstem performance.
For vent length calculation, a 90-degree elbow
counts as 6 feet and a 45-degree elbow counts
as 3 feet.
[] Determine the number of 90-degree elbows in
the vent sgstem. (Two 45-degree elbows count
as one 90-degree elbow.)
[] Refer to the table to find the maximum vent
length based on the number of elbows.
Use the chart below to compute maximum
permissible lengths for venting to outdoors.
NOTE: Factorg unit is set to vent up to 21 ft.
for maximum performance. The unit can be
reconfigured to 41 ft. See below or call
1.888.HOTWTER.
VENT LENGTH CALCULATIONS
CONCENTRIC VENT PIECE EQUIVALENT LENGTH
Stroight 1 ft (per foot length)
90 degree elbow 6 ft eoch
45 degree elbow 3 ft eoch
Totel vent length = # straight ft. + # 90-degree
elbowx 6 ft.+ # 45-degree elbowx 3 ft.
* If the length is greater than
21 ft (6.4 m), then move dip
switch no 1(SW1}to OFF
Switch No.
ON
19
Installation Instructions
VENTING INSTRUCTIONS (cont.)
FLUE INSTALLATION - CONCENTRIC VENTING
To adjust the condensate collector position:
[] Loosen the/4 screws at the rear bracket.
[] Slide the bracket away from the female
vent top.
[] Remove the 4 screws attaching the female vent
top to the water heater.
[] Lift up the female vent top and reposition as
desired (or replace with a male vent top).
[] Install the 4 screws at the vent top and tighten
the 4 screws at the bracket.
VENTING INSTRUCTIONS
(cont.)
Condensate Collector
Bracket
/
Secure the first vent component to the water heater
with one self-tapping screw at the hole located above
the condensate collector.
_iJ_ Securing Screw
VENT PRODUCTS
Listed and Tested Vent Products for GN75DNSRSA, GN94DNSRSA and GP94DNSRSA (concentric venting)
MANUFACTURER
Ubbink
Heat-Fab
MetaI-Fab
VENT MANUFACTURER CONTACT INFORMATION FOR INSTALLATION INSTRUCTIONS AND PARTS LIST
Ubbink
Telephone: 888.HOTWTER
(888.468.9837)
PRODUCT
RoluxVentSystem
Saf-TVentSCsystem
Corr/GuardVent!
Air IntakeSystem
Heat-Fab
Telephone: 1.800.772.0739
Web Site: wvwv.heatfab.com
PARTS
Referto the manufacturer's technical literature
for specific part numbers and instructions.
Atthe time of printing, these manufacturers'
products were listed and tested vent products.
Theinstaller must verify prior to installation if
proper venting isused.For up-to-date approved
vent materials,seehttpJ/directories.csa.international.org/
for the CSACertification recordwith approved vent materials.
Metal-Fob Inc.
Telephone: 1.800.835.2830
1.316.943.2351
Web Site: vwvw.metal-fabinc.com
2O
Installation Instructions
HIGH ALTITUDE INSTALLATIONS
Set dip switches 2 and S to the values shown in the
table below for gour altitude. The default setting for
the appliance is 0-2000 ft (0-610 m) with switches
No. 2 and No. 3 in the OFF position.
0-2000 ft. 2001-5200 ft. 5201-7700 ft. 7701-10200 ft.
(0-610 m) (610-1585 m) (1585-2347 m) (2347-3109 m)
Switch No. 2 OFF OFF ON ON
Switch No. 3 OFF ON OFF ON
Ik WARNING: Do not adjust the other
dip switches unless specificallg instructed to do so.
If unsure of the altitude in gour location, call
1.888.HOTWTER (888.467.9837).
Switch No.
O -- --
j[ i I _
• .... m m
ON
1 O II 1 O I i
2
3
4
5
6
7
8
Switch No.
F I z
im
CASCADING MULTIPLE WATER HEATERS
The Dual Connect Cable Kit (AGTDC1) is an optional
accessorg that connects 2 water heaters and allows
them to function as one hot water source.
The Multi Connect Kit (AGTCK1) and the Multi Connect
Cable Kit (AGTMC1) are optional accessories that
connect 3 to 5 water heaters and allow them to
function as one hot water source.
Refer to the instructions that come with the accessor9
for complete installation information.
ON
Switch No
ON
1 O 1
Switch No.
F I 2
I3
4
5
6
7
8
GUIDELINES
• Do not install the Dual Connect Cable Kit (AGTDC1)
with the Multi Connect Kit (AGTCK1) and the Multi
Connect Cable Kit (AGTMC1) because the9 are not
designed to operate togethen
• Water heaters should be installed less than
18 inches apart so that the cables will reach
between units and to prevent temperature
fluctuations (cold water sandwich effect) when
the water is shut off and turned back on.
• 3
m m
4
5
6
7
8
ON
4
5
6
7
8
-]
J
i.
NUMBEROF CONNECTEDWATERHEATERS
2
3
4
5
ConnectingTwoUnits
• Temperature settings can onlg be changed on
the controller for the primar9 unit.
ACCESSORIESNECESSARY
(1}Dual Connect Cable Kit (AGTDC1}
(1} Multi Connect Kit {AGTCK:I}and {1)Multi Connect Cable Kit(AGTMC1)
{1)Multi Connect Kit (AGTCK1)and (2}Multi Connect Cable Kits{AGTMC1)
{1)Multi Connect Kit (AGTCK1)and (3)Multi Connect Cable Kits{AGTMC1)
ConnectingFiveUnits
21
Installation Instructions
REMOTE CONTROLLER INSTALLATION
LOCATION
• The controller should
be out of reach of small
children.
• Avoid locations where
the controller may
become hot (near the
oven or radiant heater).
• Avoid locations in direct
sunlight. The digital
display may be difficult
to read in direct
sunlight.
• Avoid locations where the remote controller
could be splashed with liquids.
• Do not install in locations where it can be
adjusted by the public.
CONFIGURATIONS
A maximum of 4 remote controllers can be
installed for a water heater or bank of water
heaters. Controllers can onl Ube wired in parallel.
Controllers cannot be wired in series.
F/O
liii@iii_i!iI °'o_'o
REMOTECONTROLLER INSTALLATION
(cont.)
MOUNTING THE CONTROLLER
[] Determine a suitable location for
the controllen
[] Hount a single gang outlet box in the wall
where the remote control is indicated.
[] Run the cable between the controller
and the water heater or the controller
and the other controllen
[] Remove the face plate from the remote
controller, using a screwdriven
[] Connect the cable to the remote controllen
[] Hount the controller to the wall in the single
gang outlet box installed in step 2.
[] Disconnect the power from the water heaten
[] Remove the cover of the water heaten
[] Remove the plastic cover from the PCB
and electrical connections.
Outline of Remote
If 4 AGTRCI's are installed, press the Priorit Uand
On/Off buttons on the fourth controller until a beep
sounds.
Controllers
Wire Controflersin Parallel
CABLE LENGTHS AND SIZE
The cable for the remote controller should be
a nonpolarized two-core cable with a minimum
gauge of 22 AWG. The maximum cable length
from each controller to the water heater depends
on the total number of wired controllers connected
to the water heaten
NUMBER OF WIRED MAXIMUM CABLE LENGTH FOR EACH
CONTROLLERS CONTROLLER TO WATER HEATER
1 328 ft. {100 m)
2 164 ft. {50 m}
5 or 4 65 ft.{20 m)
securing screw
1-21/32"
wiring hole
securing screw
3-5/16"
WARNING: DONOTATTEHPT
TO CONNECT THE REMOTECONTROLLERS WITH
THE POWER ON.
[] Thread the cable through the access hole
at the base of the unit and connect the wires
to the controller terminals on the bottom
right-hand side of the PCB.
[] Secure the controller cable using the clamp
provided.
22
Installation Instructions
REMOTECONTROLLERINSTALLATION(cont.)
MOUNTING THE CONTROLLER {cont.)
[] Replacethe plasticcover over the PCB,and then
replacethe cover ofthe water beater.
REMOTECONTROL
CONNECTIONTERMINALS
CLEANINGTHE INLETFILTER
It isimperative that Waterinlet
control compartments,
burners and circulating _,
air passagewagsof the
appliance be kept clean.
\
CAUTION:Before
performing this action,first
remove power to the water
heater and be sure not to _ ....
stand near the discharge
line of the pressurerelief
valve.Thiswill prevent a possiblescald injurg.
[] Turnoff and disconnect electricalpoweEAllowwater
heater to cool.
[] Shutoff water inlet.
[] Openhot water tap at nearest faucet.
[] Closeoutlet valve on unit.
[] Havea small pan or bucket read9 to catch spilled
wateE
[] Removeand clean the water inletfilter with a small
brush. If scale ispresent, clean in a white vinegar
solution.
[] Replacewater inlet filter.
[] Removethe front panel bg removing 4screws.
NOTE:Viewshown
isfromundertheunit
CLEANINGTHE INLETFILTER(cont.)
[] Usepressurizedair to removedust from the main
burner,heat exchanger and fan blades.Do not use a
wet cloth or sprag cleaners on the burneEDonot use
volatile substancessuch as benzeneand thinners.
Thegmag igniteor fade the paint.
[] Usesoft drg cloth to wipe cabinet.
[] Openwater valves.
[] Checkfor leaks.
[] Connectelectrical power and turn on the unit.
INSTALLATIONCHECKLIST
• Ensure120VoltsA.Cisconnected to the unit and that
the circuit isturned on.
• Verify the gassgstem isfunctioning correctlg bg
connecting sour manometer to the gas pressuretest port
on the unit (seepage 13).Operate all gas appliances in
the facilitg. The inletgas pressureon the unit MUSTNOT
DROPBELOWthat listedon the unit rating plate for the
gastgpe being used.A manometer can be usedto check
the pressure.
• Make sureSOUhave cleaned the COLDwater inlet filter
screen.
• Inspect HOT(outlet)and COLD(inlet)water linesto ensure
theg have not been crossed and are leak-free.
• Ensurethe manual gasvalve packaged with the water
heater is installed in the gas supplgline (seepage 12).
• Ensurethe controller isinstalledand functioning.
Instruct the consumer on how to operate the controller.
Instructions are alwags suppliedin the Owner's Manual
(seepage 22}.Atgpical water temperature set point
is 120degrees.
• Explainto the customer the importance of never
blocking the vent ducting, intake and exhaust.
Never store angthing around the vent exhaust.
• Ensuregou haveusedthe correct ventingproducts
for the model installed and that gou have completelg
followed the venting installation instructions
(seepages 19-20).
• Ensurethe condensate collector drain on the unit
isinstalled to allow condensation to drain awag from
the water heater to a proper drain source (seepage 8}.
• Thevent sgstemshould not exceedthe maximum length
for the number of elbows used.Referto the venting
maximum length chart on page 19.Applgthe vent
temperature caution labelto the vent terminal located
outside the home.
O
,t
j maycauseserious burns.Keep
• Forinstructions on operating the unit,
referto the Owner's Manual.
23
TECHNICAL DATA
PRESSUREDROP CURVE
30
Installation Instructions
25
20
O_
09
O3
o
J 15
5
0.0 2.0 4.0 6.0 8.0
OUTLET FLOW DATA
Water Flow (gpm)
/
GN75 ]
/
_ GN94/GP94
10.0
6O
5O "a
40
30 _
2o _
10
o
(D
J::
0
J
D._
10
E
Gn
v
36
n,
o
LL
,- 4
'5
I 2
9
8
7
5
3
o
0 25
\
- \
\\
\\
75 10050
125 150
delta T - Temperature Rise (°F)
24
Installation Instructions
LADDER DIAGRAM
3A(FUSE)
_RRESTE_
GN_
HOT
@
FROSTSENSING
SWITCH
I
i
i
I
VARISTOR _
SWITCHING ]
POWERSUPPLY
NEUTRAL
ANTI-FROSTNEATER
L J
INDOORMODELONLY
25
Notes
26
Notes
27
Notes
28
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