Giant Factories ANSI Z21.10.3 User manual

DO NOT store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
• DO NOT try to light any appliance.
•
DO NOT touch any electrical switch.
• DO NOT use any phone in your building.
•
From a neighbor’s phone, immediately call your gas sup-
plier. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department .
Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
DIRECT VENT TANKLESS WATER HEATERS
OWNER’S MANUAL
INSTALLATION AND OPERATING INSTRUCTIONS
IMPORTANT
READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR OPERATING THIS WATER HEATER.
THIS MANUAL PROVIDES INFORMATION ON THE INSTALLATION, OPERATION, AND MAINTENANCE OF THE
WATER HEATER. FOR PROPER OPERATION AND SAFETY IT IS IMPORTANT TO FOLLOW THE INSTRUCTIONS
AND ADHERE TO THE SAFETY PRECAUTIONS. A LICENSED PROFESSIONAL MUST INSTALL THE WATER
HEATER ACCORDING TO THE EXACT INSTRUCTIONS. THE CONSUMER MUST READ THE ENTIRE MANUAL
TO PROPERLY OPERATE THE WATER HEATER AND TO HAVE REGULAR MAINTENANCE PERFORMED.
© 2015 Giant Factories Inc. Printed in Canada GI-IM045En-1015
For your records, write the model and serial number
here:
Model # _________________________________________
Serial # _________________________________________
R
R
R
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
If the information in these instructions is not followed exact-
ly, a fire or explosion may result causing property damage,
personal injury, or death.
FOR INDOOR
APPLICATIONS ONLY
UGTC-199N
UGTC-199P
UGTC-152N
UGTC-152P
ANSI Z21.10.3 • CSA 4.3

2
Safety Information .................................2
Safety Behaviors ..................................3
Installation Instructions.............................4
Installer Qualifications ............................ 4
General Instructions .............................. 4
Determine Installation Location ..................... 5
Vent Termination Clearances ....................... 6
Additional clearances ............................. 7
Unit clearances .................................. 8
Freeze Protection ................................ 8
Maximum vent length ............................. 8
Checklist to Determine Installation Location............ 9
Mount to Wall ................................... 9
Remove the Front Panel ........................... 9
Installation of Venting............................ 10
Venting Guidelines .............................. 10
Flue Installation with Centrotherm Venting ............ 12
Condensate.................................... 12
Checklist for Venting and Condensate ............... 13
Twin Pipe Venting Guide ...........................13
Installation Instructions .......................... 14
Determine Installation Location .................... 15
Determining Vent Length ......................... 15
Adaptor Installation.............................. 19
Certified PVC/CPVC Vent Termination Options ......... 20
Acceptable Venting Clearances For IPEX Concentric
Vent Kit (CVK) Termination........................ 22
Venting Installation Sequence...................... 23
Twin Pipe (PVC/CPVC) Terminations ................ 24
PVC/CPVC Roof (Tee and upside down “U”)
Terminations................................... 25
Installation Instructions (continued)..................28
Installation of Plumbing .......................... 29
Connect Water Heater to Water Supply............... 29
Checklist for Plumbing ........................... 29
Installation of Gas Supply......................... 31
General Instructions ............................. 31
Connect Electricity .............................. 32
Adjust for High Altitude (United States) .............. 32
Adjust for High Altitude (Canada) ................... 32
Adjust for Vent Length ........................... 33
Checklist for Gas and Electricity .................... 33
Installation of Temperature Controller ............... 33
Final Installation Checklist ........................ 34
Technical Data ...................................35
Specifications .................................. 35
Dimensions.................................... 36
Recirculation Mode.............................. 38
Wiring Diagram................................. 40
Operating Instructions .............................41
Consumer Operation Guidelines for the
Safe Operation of your Water Heater ................ 41
How to Use the Temperature Controller .............. 42
How to Set the Temperature ....................... 42
Troubleshooting Guide ............................44
Diagnostic Codes and Remedies.................... 44
System Maintenance ..............................46
Flushing the Heat Exchanger....................... 47
Manual Draining of the Water Heater ................ 48
Running a low volume of water through the water heater
to prevent freezing .............................. 48
When the water heater or external piping has frozen .... 48
Regulations......................................49
Warranty ........................................50
TABLE OF CONTENTS
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SAFETY INFORMATION
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
Your safety and the safety of others is extremely important during the installation, operation, and servicing of this water heater. Many safety
related messages have been provided in this manual and on your water heater. Always read and obey all safety messages. These messages
will point out the potential hazard, tell you how to reduce the risk of injury, and tell you what will happen if the instructions are not followed.
Indicates a potentially hazardous situation which, if not avoided, could result in serious injury
or death.
Indicates an imminently hazardous situation which, if not avoided, will result in serious injury
or death.
Indicates a potentially hazardous situation which, if not avoided, could result in minor or mod-
erate injury. It may also be used to alert against unsafe practices.
This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others.

3
SAFETY BEHAVIORS
California law requires this notice to be provided:
California Proposition 65 lists chemical substances known to the state to cause cancer, birth defects, death, serious illness, or other re-
productive harm. This product may contain such substances, be their origin from fuel combustion (gas, oil), or components of the product
itself.
If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death.
Hot water can be dangerous, especially for infants or children, seniors, or disabled people. There is hot
water scald potential if the thermostat is set too high.
Water temperatures over 125ºF (52ºC) can cause severe burns or scalding resulting in death.
Hot water can cause first degree burns with exposure for as little as:
Three (3) seconds at 140ºF (60ºC)
Twenty (20) seconds at 130ºF (54ºC)
Eight (8) minutes at 120ºF (49ºC)
Test the temperature of the water before placing a child in the bath or shower.
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
•BURN HAZARD. Hot exhaust and vent may cause serious
burns. Keep away from the water heater unit. Keep children and
animals away from the unit.
•Hot water outlet pipes leaving the unit can be hot to touch. In
residential applications, insulation must be used for hot water
pipes below thirty-six (36) inches (91.4 cm) due to burn risk
to children.
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
•Before operating, smell all around the appliance area for gas.
Be sure to smell next to the floor because some gas is heavier
than air and will settle on the floor.
•Keep the area around the appliance clear and free from com-
bustible materials, gasoline, and other flammable vapors and
liquids.
•Combustible construction refers to adjacent walls and ceiling
and should not be confused with combustible or flammable
products and materials. Combustible and/or flammable prod-
ucts and materials should never be stored in the vicinity of this
or any gas appliance.
•Always check the water temperature before entering a shower
or bath.
•To protect yourself from harm, before performing maintenance:
* Turn off the electrical power supply by unplugging the
power cord or by turning off the electricity at the circuit
breaker. (The temperature controller does not control
the electrical power.)
* Turn off the gas at the manual gas valve, usually located
immediately below the water heater.
* Turn off the incoming water supply. This can be done at
the isolation valve immediately below the water heater
or by turning off the water supply to the building.
•Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by hand,
do not try to repair it; call a licensed professional. Force or at-
tempted repair may result in a fire or explosion.
•Do not use this appliance if any part has been under water.
Immediately call a licensed professional to inspect the appli-
ance and to replace any part of the control system and any gas
control which has been under water.
•Do not use substitute materials. Use only parts certified with
the appliance.
•Should overheating occur or the gas supply fail to shut off, turn
off the manual gas control valve to the appliance.
•Do not adjust the DIP switch unless specifically instructed to
do so.
•Do not use an extension cord or an adapter plug with this ap-
pliance.
•Any alteration to the appliance or its controls can be dangerous
and will void the warranty.
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION

4
Installer Qualifications
A licensed professional must install, inspect, and leak test the
appliance before use. The warranty will be voided due to improper
installation.
The installer should have skills such as:
•gas sizing
•connecting gas lines, water lines, valves, electricity
•knowledge of applicable national, provincial, and local codes
•installing venting through a wall or roof
If you lack these skills, contact a licensed professional.
Type of installation
•For installation in residential and commercial applications.
•You must follow the installation instructions for adequate com-
bustion air intake and exhaust.
General Instructions
DO NOT
•Do not install the UGTC-152 or the UGTC-199 outdoors.
•Do not install the appliance in an area where water leakage of
the unit or connections will 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 air flow.
•Do not obstruct the flow of combustion and ventilation air. Com-
bustion air shall not be supplied from occupied spaces.
•Do not use this appliance in an application such as a pool or spa
heater that uses chemically treated water. (This appliance is suit-
able for filling large or whirlpool spa tubs with potable water.)
•Do not use substitute parts that are not authorized for this ap-
pliance.
MUST DO
•The installation must conform with local codes or, in the ab-
sence 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.
•When installed, the appliance must be electrically grounded in
accordance with local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70, or the Canadian
Electrical Code, CSA C22.1.
•The appliance and its appliance main gas valve must be discon-
nected 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 sys-
tem by closing its individual manual shut-off valve during any
pressure testing of the gas supply piping system at test pres-
sures equal to or less than 1/2 psi (3.5 kPa) (13.84 in W.C.).
•You must follow the installation instructions for adequate com-
bustion air intake and exhaust.
INFORMATION
•If a water heater is installed in a closed water supply system,
such as one having a backflow preventer in the cold water sup-
ply line, means shall be provided to control thermal expansion.
Contact the water supplier or local plumbing inspector on how
to control thermal expansion.
•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 location free of chemicals such as chlorine
or bleach that produce fumes. These fumes can damage compo-
nents and reduce the life of your appliance.
Table 1
Prepare for installation
Parts included
•Tankless water heater •MC-91-2 temperature controller
(integrated into the front panel)
Tools needed
•Pipe wrenches (2)
•Adjustable pliers
•Screwdrivers (2)
•Wire cutters
•Gloves
•Safety glasses
•Level
•Manometer
Tools that might be needed
•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
Materials needed
•Soap solution
•Approved venting
•Teflon tape (recommended) or
pipe compound
Materials that may be needed
•Heat tape
•Pipe insulation
•Electrical wire and conduit
per local code
•Concrete wall anchors
•Optional pipe cover
•Optional temperature
controller
•5/8” ID PVC flexible tubing
•Two (2) conductor 22 AWG
wires for controller
•Single gang electrical box
•Wire nuts
•Unions and drain valves
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS

54
Determine Installation Location
You must ensure that clearances will be met and that the vent
length will be within required limits. Consider the installation
environment, water quality, and need for freeze protection. Re-
quirements for the gas line, water lines, electrical connection, and
condensate disposal can be found in their respective installation
sections of this manual.
Water Quality
Consideration of care for your water heater should include evalu-
ation of water quality.
Water that contains chemicals exceeding the levels below
will affect and damage the heat exchanger. Replacement
of the heat exchanger due to water quality damage is not
covered by the warranty.
Table 2
Maximum Level
Total Hardness Up to 200 mg / L
Aluminum * Up to 0.2 mg / L
Chlorides * Up to 250 mg / L
Copper * Up to 1.0 mg / L
Iron * Up to 0.3 mg / L
Manganese * Up to 0.05 mg / L
pH * 6.5 to 8.5
TDS (Total Dissolved Solids) * Up to 500 mg / L
Zinc * Up to 5 mg / L
* Source: Part 143 National Secondary Drinking Water Regulations.
If you install this water heater in an area that is known to have hard
water or that causes scale build-up, the water must be treated and/
or the heat exchanger flushed regularly.
When scale build-up in the heat exchanger begins to affect the
performance of the water heater, the diagnostic code “LC #” will
display. Flush the heat exchanger to prevent damage to it. Scale
build-up is caused by hard water set at a high temperature.
Environment
Air surrounding the water heater, venting, and vent termination(s)
is used for combustion and must be free of any compounds that
cause corrosion of internal components. These include corrosive
compounds that are found in aerosol sprays, detergents, bleach-
es, cleaning solvents, oil based paints/varnishes, and refrigerants.
The air in beauty shops, dry cleaning stores, photo processing
labs, and storage areas for pool supplies often contains these
compounds.
The water heater, venting, and vent termination(s) should not be
installed in any areas where the air may contain these corrosive
compounds. If it is necessary for a water heater to be located in
areas which may contain corrosive compounds, the following in-
structions are strongly recommended.
IMPORTANT CONSIDERATIONS FOR:
Indoor/Internal Water Heaters and Vent Terminations of
Indoor/Internal Water Heaters
• DO NOT install in areas where air for combustion can be
contaminated with chemicals.
•Before installation, consider where air has the ability to travel
within the building to the water heater.
•Where possible, install the water heater in a sealed closet so
that it is protected from the potential of contaminated indoor
air.
•Chemicals that are corrosive in nature should not be stored
or used near the water heater.
•Install the water heater termination as far away as possible
from exhaust vent hoods.
•Install the water heater termination as far away as possi-
ble from air inlet vents. Corrosive fumes may be released
through these vents when air is not being brought in through
them.
•Chemicals that are corrosive in nature should not be stored
or used near the water heater or vent termination.
Damage and repair due to corrosive compounds in the air is not
covered by warranty.
INSTALLATION INSTRUCTIONS

6
Vent Termination Clearances
You must install a vent termination to bring in combustion air and expel exhaust.
The Vent Termination must have a:
Canadian Installations U.S. Installations
A) Clearance above grade, veranda, porch, deck, or balcony1
12 inches (30 cm) 12 inches (30 cm)
B) Clearance to window or door that may be opened 36 inches (91 cm) 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 two (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
3 feet (91 cm) within a
height of 15 feet (4.5 m)
above the meter/ regulator
assembly
*
I) Clearance to service regulator vent outlet 36 inches (91 cm) *
J) Clearance to non-mechanical air supply inlet to building or the combustion
air inlet to any other appliance 36 inches (91 cm) 12 inches (30 cm)
K) Clearance to a mechanical air supply inlet 6 feet (1.83 m) 3 feet (91 cm) above
if within 10 feet (3 m)
L) Clearance above paved sidewalk or paved driveway located on public
property 7 feet (2.13 m)1*
M) Clearance under veranda, porch, deck, or balcony 12 inches (30 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.
* 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 twenty-four
(24) inches (61 cm).
INSIDE
CORNERDETAIL
FIXED
CLOSED
OPERABLE
FIXED
CLOSED
OPERABLE
B
B
B
A
J
BM
C
F
B
B
E
D
L
G
A
H
K
I
X
V
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL
IS NOT PERMITTTED
SNOW
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
INSIDE
CORNERDETAIL
FIXED
CLOSED
OPERABLE
FIXED
CLOSED
OPERABLE
B
B
B
A
J
BM
C
F
B
B
E
D
L
G
A
H
K
I
X
V
ENTRÉE D’AIR
TERMINAISON D’ÉVENT
ZONE OÙ IL NE PEUT Y AVOIR
DE TERMINAISON
SNOW
TERMINATION
TERMINAISON
NEIGE
FERMETURE
PERMANENTE
ACTIONNABLE
FERMETURE
PERMANENTE
-
ACTIONNABLE
Le dégagement
dans la référence
A s’applique
également à la
hauteur de neige
prévue
DÉTAIL D’UN
COIN INTÉRIEUR
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS
Figure 1

76
Additional clearances
Check on whether local codes supersede these clearances.
•Avoid termination locations near a dryer vent.
•Avoid termination locations near commercial cooking exhaust.
•You must install a vent termination at least twelve (12) inches
(30.5 cm) from the ground.
The vent for this appliance shall not terminate:
•Over public walkways; or
•Near soffit vents or crawl space vents or other area where con-
densate or vapor could create a nuisance or hazard or cause
property damage; or
•Where condensate or vapor could cause damage or could be
detrimental to the operation of regulators, relief valves, or other
equipment.
Important considerations for locating vent termi-
nation under a soffit (ventilated or unventilated or eave vent; or
to a deck or porch);
•Do not install vent termination under a soffit vent such that ex-
haust can enter the soffit vent;
•Install vent termination such that exhaust and rising moisture
will not collect under eaves. Discoloration to the exterior of the
building could occur, if installed too close;
•Do not install the vent termination too close under the soffit
where it could present recirculation of exhaust gases back into
the combustion air intake part of the termination.
Figure 2
(30,5 cm) entre des
terminaisons au
même niveau
12"
V V
(30.5 cm) between
terminals at same
level
12"
V V
(1,5 m) entre
des terminaisons
à des niveaux
différents
V
60"
V
(1.5 m)
vercally
between
terminals
V
60"
V
12"
12"
36"
INSIDE
CORNER
V V
terminaisons au même
niveau
(30,5 cm) entre des
(30,5 cm)
jusqu’à un
angle intérieur
ANGLE
RENTRANT
12"
12"
36"
INSIDE
CORNER
V V
terminals at same
level
(30.5 cm) to
(30.5 cm) between
an inside
corner
Figure 3
60"
V
V
(1,5 m)
vercalement
entre des
terminaisons
60"
V
V
(1.5 m)
between
terminals at
different levels
Figure 4
24"
V
(61 cm) jusqu’à un mur
ou parapet
(61 cm) to wall or parapet
24"
V
Figure 5
INSTALLATION INSTRUCTIONS

8
Unit clearances
to side
to front
to top
to floor/ground
Vers le haut
Vers le côté
Vers l’avant
Vers le sol/plancher
to side
to front
to top
to floor/ground
Figure 6
Table 3
to Combustibles
inches (cm)
to Non
Combustibles
inches (cm)
Top of Heater
6 * (15.2) 2 *(5.1)
Back of Heater
0 (zero) 0 (zero)
Front of Heater
6 (15.2) 6 (15.2)
Sides of Heater
2 (5.1) 1/2 (1.3)
Ground/Bottom
12 (30.5) 12 (30.5)
Vent
0 (zero) 0 (zero)
*0 inch from vent components and condensate drain line
The clearance for servicing is twenty-four (24) inches (61 cm) in
front of the water heater.
For closet installation, clearance is six (6) inches (15.2 cm) from
the front.
Freeze Protection
In case of freezing weather, make sure that the water heater and
its water lines are protected to prevent freezing. Damage due to
freezing is not covered by the warranty.
Loss of freeze protection may result in water damage from a burst
heat exchanger or water lines.
With electrical power supplied, the water heater will not freeze
when the outside air temperature is as cold as –22°F (-30°C) for
indoor models, when protected from direct wind exposure .
Because of the “wind-chill” effect, any wind or air circulation on
the unit will reduce its ability to freeze protect.
The unit may be drained manually. However, it is highly recom-
mended that drain down solenoid valves are installed that will au-
tomatically drain the unit if power is lost. These are available in a
kit, P/N 15000029-A. (The condensate trap drain plug and water
drain plug are not affected by the auto drain down solenoid valves
and will have to be manually opened.)
In addition, the solenoid valves should be connected electrically to
a surge protector with terminals. This allows the solenoid valves
to operate if the water heater is disabled due to a diagnostic code.
The freeze protection features will not prevent the external piping
from freezing. It is recommended that hot and cold water pipes are
insulated. Pipe cover enclosures may be packed with insulation for
added freeze protection.
It is recommended that the condensate trap drain line be insulated.
A frozen condensate trap drain line results in diagnostic code #25.
In the event of a power failure at temperatures below freezing,
the water heater should be drained of all water to prevent freezing
damage. In addition, drain the condensate trap and drain line.
Maximum vent length
Maximum vent length with concentric venting
1) Determine the number of 90-degree elbows in the vent sys-
tem. (Two (2) 45-degree elbows count as one (1) 90-degree
elbow.)
2) Refer to the table to find the maximum vent length based on
the number of elbows.
Table 4
Number of
900 Elbows
Maximum vent length
(concentric venting)
0
41 ft (12.5 m)1
1
35 ft (10.7 m)2
2
29 ft (8.8 m)3
3
23 ft (7.0 m)4
4
17 ft (5.2 m)4
5
11 ft (3.4 m)4
6
5 ft (1.5 m)4
3) Adjust switch # 1 in the SW1 DIP switch (tan switches), if
required by the applicable note.
1. If the length is greater than twenty-one (21) feet (6.4 m),
then move switch # 1 (SW1) to OFF.
2. If the length is greater than fifteen (15) feet (4.5 m), then
move switch # 1 (SW1) to OFF.
3. If the length is greater than nine (9) feet (2.7 m), then
move switch # 1 (SW1) to OFF.
4. Move switch # 1 (SW1) to OFF.
Example: If you have one elbow, then your maximum
vent length is thirty-five (35) feet (10.7 m). If your actual
length is greater than fifteen (15) feet (4.5 m), then move
switch # 1 (SW1) to OFF.
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS

98
If you have a longer vent length (see above), switch # 1 is re-
quired to be in the OFF position. This ensures the water heater
will run properly. Blocked flue diagnostic codes and shutdowns
may result if switch # 1 is not in the correct position.
Maximum vent length for Centrotherm 2 Pipe InnoFlue Vent System
(single wall SW, 3-inch (7.6 cm) diameter)
Table 5: Vent length using short radius elbow
Number of
90° Short
Radius
Elbows
Maximum
Straight Vent
Length
Switch #1 in the tan
DIP switches
(If length is greater)
042 feet
(12.8 m)
18 feet (5.5 m) move
switch #1 to OFF
127 feet
(8.2 m)
3 feet (91.4 cm) move
switch #1 to OFF
212 feet
(3.7 m) move switch #1 to OFF
Table 6: Vent length using long radius elbow
Number of
90° Long
Radius
Elbows
Maximum
Straight Vent
Length
Switch #1 in the tan
DIP switches
( If length is greater)
042 feet
(12.8 m)
21 feet (6.4 m) move
switch #1 to OFF
127 feet
(8.2 m)
15 feet (4.5 m) move
switch #1 to OFF
212 feet
(3.7 m)
9 feet (2.7 m) move
switch #1 to OFF
327 feet
(8.2 m)
3 feet (91.4 cm) move
switch #1 to OFF
421 feet
(6.4 m)
Move switch # 1 to OFF
for any length
515 feet
(4.5 m)
69 feet
(2.7 m)
73 feet
(91.4 cm)
Checklist to Determine Installation Location
□The water heater is not exposed to corrosive compounds in
the air.
□The water heater location complies with the clearances.
□The planned venting will not exceed the maximum length for
the number of elbows used.
□The planned venting termination/air intake location meets the
clearances.
□The water supply does not contain chemicals or exceed total
hardness that will damage the heat exchanger.
□A standard 3-prong 120 VAC, 60 Hz properly grounded wall
outlet or other 120 VAC, 60 Hz source is available.
□The installation must conform with local codes or, in the ab-
sence 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.
□
Leave the entire manual taped to the water heater or
give the entire manual directly to the consumer.
Mount to Wall
Wall installaon
brackets
Supports
d’installaon
murale
Figure 7
1) Identify the installation location and confirm that the in-
stallation will meet all required clearances.
2) Securely attach the water heater to the wall using any
of the holes in the wall installation brackets which are at the
top and bottom of the water heater. Ensure that the attach-
ment strength is sufficient to support the weight. Refer to the
weight of the water heater in the Specifications section. Use
a leveling tool to ensure that the water heater is level. Proper
operation requires that the water heater be level.
NOTE: The water heater should be installed in an upright position.
Do not install upside down or on its side.
Remove the Front Panel
Slide the plastic trim pieces on each side of the water heater to
expose the screws. Remove the four (4) screws and pull off the
front panel.
INSTALLATION INSTRUCTIONS
NOTICE

10
Installation of venting
Install the correct venting for your model according to the venting
manufacturer’s instruction and the guidelines below (see Table 7
and Table 8). Refer to the manufacturer’s technical literature for
specific part numbers and instructions.
Venting Guidelines
DO NOT
•Do not use cellular core PVC/CPVC, Radel, or galvanized materi-
al to vent this appliance.
•Do not combine vent components from different manufacturers.
•Vent diameter must not be reduced.
•Do not connect the venting system with an existing vent or
chimney.
•Do not common vent with the vent pipe of any other manufac-
turer’s water heater or appliance. Giant water heaters can only
be common vented using a Giant certified common vent sys-
tem. Common venting is approved for Canadian and U.S. instal-
lations.
MUST DO
•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.
•The vent system must vent directly to the outside of the building
and use outside air for combustion.
•Avoid dips or sags in horizontal vent runs by installing supports
per the vent manufacturer’s instructions.
•Support horizontal vent runs every four (4) feet (1.2 m) and all
vertical vents run every six (6) feet (1.8 m) or in accordance with
local codes.
•Venting should be as direct as possible with a minimum number
of pipe fittings.
•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.
INFORMATION
•Refer to the instructions of the vent system manufacturer for
component assembly instructions.
•If the vent system is to be enclosed, it is suggested that the de-
sign of the enclosure shall permit inspection of the vent system.
The design of such enclosure shall be deemed acceptable by the
installer or the local inspector.
If it becomes necessary to access an enclosed vent system for
service or repairs, Giant is not responsible for any costs or
difficulties in accessing such vent system. The warranty does
not cover obtaining access to a vent system in an enclosed
environment.
Table 7
Manufacturer Listed and Tested Vent Products Telephone Fax Contact
Ubbink Rolux Condensing Vent System 800-363-9354 514-640-0969 www.giantinc.com
Concentric to Twin pipe adapter
IPEX Concentric/low profile termination kit 866-473-9462 514-769-1672 www.ipexinc.com
[email protected]
Centrotherm InnoFlue Vent System
(single wall SW, 3-inch (7.6 cm) diameter) 877-434-3432 518-618-3166 [email protected] www.centrotherm.us.com
Heat-Fab Saf-T Vent SC System 800-772-0739 413-863-4803 [email protected]
www.heatfab.com
Metal-Fab Corr/Guard Vent/Air Intake System 800-835-2830 316-943-2717 [email protected]
www.metal-fabinc.com
Table 8
Manufacturer Product Vertical Termination Horizontal Termination
Ubbink Rolux 96000050-A 96000051-A, 96000052-A
PVC/CPVC concentric to twin pipe adapter
IPEX Concentric/low profile termination kit
Centrotherm InnoFlue ICRT3539 ISELL0387UV
Heat-Fab Saf-T Vent Saf-T Vent CI Plus
Wall Termination Saf-T Vent CI Plus Rain Cap
Metal-Fab Corr/Guard 3CGRVDK 3CGRVT
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS
NOTICE