Giant PV1 Safety guide

IMPORTANT
READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING THE INSTALLATION. PROPER
INSTALLATION WILL PROVIDE SAFE AND EFFICIENT SERVICE AND AVOID NEEDLESS EXPENSE NOT
COVERED BY THE WARRANTY. READ THE PRODUCT WARRANTY CONTAINED IN THIS MANUAL AND
REMEMBER TO FILL OUT AND RETURN TO THE MANUFACTURER ALL RELEVANT WARRANTY CARDS
AND CERTIFICATES. SHOULD YOU HAVE ANY QUESTIONS, PLEASE CONTACT YOUR LOCAL DEALER OR
REFER TO THE GETTING SERVICE FOR YOUR WATER HEATER SECTION OF THIS MANUAL.
SAVE THIS MANUAL FOR FUTURE REFERENCES.
DO NOT store or use gasoline or other
flammable vapours 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 neighbour’s phone, immediate-
ly call your gas supplier. 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.
54000030
© 2015 Giant Factories Inc. Printed in Canada GI-IM025En-0415
PV1 Model only
RESIDENTIAL POWER VENT GAS-FIRED WATER HEATERS
(EQUIPPED WITH FVIR TECHNOLOGY)
OWNER’S MANUAL
INSTALLATION AND OPERATING INSTRUCTIONS
WARNING
This water heater IS NOT design certified for
installation in a manufactured (mobile) home or
for installation outdoors.
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 records, write the model and serial
number here:
Model # ________________________
Serial #_________________________
ISO 9001
REGISTRED
R

2
TABLE OF CONTENTS
This water heater is equipped with the FVIR technology. Activation of the FVIR technology occurs when flammable
vapours are drawn into the water heater. If the flammable vapour sensor detects the presence of flammable vapours
when the water heater is operating, the gas control will switch to lock-out mode and the water heater will shut down.
If the water heater is not operating when the flammable vapours are detected, the control will switch to lock-out mode
and prevent the water heater from lighting. If the flammable vapours enter the combustion chamber and ignite, the
flame arrestor will prevent these combustible vapours from igniting outside of the water heater.
If flammable vapours are detected:
• DO NOT try to light any appliance.
• DO NOT touch any electrical switch. DO NOT use any phone in your building.
• From a neighbour’s phone, immediately call your gas supplier. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
After the flammable vapours have been evacuated, contact a qualified service technician or the gas supplier to have
the water heater inspected immediately.
Replacement of a FVIR technology equipped water heater due to a flam-
mable vapour shutdown is not covered under the terms of the Standard Basic Limited Warranty.
FVIR technology equipped with a flammable vapour sensor and the flame arrestor.
Safety Information . . . . . . . . . . . . . .3
Installation Instructions . . . . . . . . . . .4
Altitude. . . . . . . . . . . . . . . . . . .4
Location . . . . . . . . . . . . . . . . . .4
Minimum Clearances . . . . . . . . . . . . 4
Combustion and Ventilation Air Supply . . . . 4
Requirements for Unconfined Spaces . . . . 5
Requirements for Confined Spaces . . . . . 5
Louvers and Grilles . . . . . . . . . . . . . 6
Corrosive Atmospheres . . . . . . . . . . . 6
Venting . . . . . . . . . . . . . . . . . . 7
Venting connection to the water heater . . . . 7
Through-the-Wall Venting Installation . . . . 9
Through-the-Roof Venting Installation . . . . 9
Pipe Assembly . . . . . . . . . . . . . . 10
Vent termination through-the-Wall . . . . . 12
Vent termination through-the-Roof . . . . . 12
Restrictor Screens . . . . . . . . . . . . 12
Condensation in the Venting system . . . . 13
Water Piping . . . . . . . . . . . . . . . 13
Temperature and Pressure-Relief Valve . . 13
Pressure Build-up in a Water System . . . 13
Filling the Water Heater . . . . . . . . . . 13
Gas Connections . . . . . . . . . . . . . 14
Installation Instructions for
Water Heaters Approved for Space Heating
and Potable Water Heating . . . . . . . 14
Wiring . . . . . . . . . . . . . . . . . . 16
Installation Checklist . . . . . . . . . . . 17
Operating Instructions . . . . . . . . . . . 18
Lighting the Water Heater . . . . . . . . . 18
Water Temperature Regulation . . . . . . 19
OutofFuel . . . . . . . . . . . . . . . 20
General Maintenance . . . . . . . . . . . 20
Housekeeping . . . . . . . . . . . . . . 20
Safety System . . . . . . . . . . . . . . 20
Condensation . . . . . . . . . . . . . . 20
Burner Ignitor Assembly . . . . . . . . . . 21
WaterHeaterTank . . . . . . . . . . . . 21
Temperature and Pressure-Relief Valve . . 21
Venting System Inspection. . . . . . . . . 21
Anode . . . . . . . . . . . . . . . . . . 21
Draining the Water Heater . . . . . . . . . 21
Vacation . . . . . . . . . . . . . . . . . 22
Getting Service for your Water Heater . . . 22
Replacement Parts . . . . . . . . . . . . . 23
Troubleshooting Guide . . . . . . . . . . . 24
Model Dimensions . . . . . . . . . . . . . 27
Warranty . . . . . . . . . . . . . . . . . . 28
Flammable Vapour Sensor
Do not remove the protective cover. Do not spray water or leak detector
products on this sensor. Do not expose this sensor to bleach or other liquid
cleaning products.Avoid humid environments and freezing temperatures.
If the sensor detects the presence of flammable vapours, the gas control will
switch to lock-out mode and the water heater will shut down. Do not try and
restart the water heater. Have the water heater inspected immediately by a
qualified service technician or the gas supplier.
WARNING
!!

3
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 abide by 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.
This is the safety alert symbol. This symbol alerts you to potential hazards
that can kill or hurt you and others. All safety messages will follow the safety
alert symbol and either the word “DANGER” or “WARNING”.
Serious injury or death can occur if you do not
follow the instructions immediately.
Serious injury or death can occur if you do not follow the
instructions.
SAFETY INFORMATION
WARNING
DO NOT use this water heater if any part has been under water. Immediately call a
qualified service technician to inspect the water heater and to replace any part of the
control system and any gas control which has been under water. Failure to follow this instruc-
tion can result in property damage, personal injury, or death.
DANGER
WARNING

4
Altitude
This water heater is approved for altitudes up to 5,000 feet
(1,524 m).
Location
This water heater should be located close enough to the
outside wall so that it is within the venting requirements
listed in these installation instructions and as close as
possible to the main use of hot water. This location must
not be subject to freezing temperatures. The water
heater should be positioned, so that there is easy
access to the burner, gas control valve and drain valve.
It must be located close to a suitable free-flowing floor
drain. Where a floor drain is not adjacent to the water
heater, a suitable drain pan must be installed under the
water heater (see Figure 12). This drain pan should be at
least four (4) inches (10.2 cm) larger than the diameter of
the water heater and at least one (1) inch (2.5 cm) deep,
providing access to the drain valve. This pan must not
restrict the flow of ventilation and combustion air. This
pan must be piped to a suitable drain to prevent damage
to property in the event of a water leak from the piping,
the relief valve or the water heater.
Sooner or later, all water heaters leak. The
manufacturer, based on national building codes,
has given the necessary instructions to prevent
damage to the building. Under no circumstances
is the manufacturer to be held liable for any water
damage in connection with this water heater.
This water heater is approved for installation on either a
combustible or non-combustible floor. However, should
this water heater be installed directly on carpeting, such
carpeting must be protected by a wood or metal panel
beneath the water heater. This panel must extend at
least three (3) inches (7.6 cm) beyond the width and
depth of the water heater. Should the water heater be
installed in an alcove or closet, the entire floor area must
be covered by the panel.
Minimum Clearances
The minimum clearances from combustible material for
this water heater are: Two (2) inches (5.1 cm) from the
sides and rear, four (4) inches (10.2 cm) from the front
and eighteen (18) inches (45.7 cm) from the top (see
Figure 1).
18''
min.
2'' min.
2'' min.
2'' min.
4'' min.
Figure 1
Combustion and Ventilation Air Supply
In order for the water heater to operate properly, it must
be supplied with an uninterrupted flow of clean com-
bustion and ventilation air. The area around the water
heater must always be kept clear and the combustion
air intake holes at the bottom of the water heater must
never be blocked. An inadequate supply of air to the
water heater will produce a bright yellow burner flame
causing sooting in the combustion chamber, on the
burner and in the flue tube. This can result in dam-
age to the water heater and serious bodily injury, if not
corrected.
INSTALLATION INSTRUCTIONS
IMPORTANT
These instructions have been written as a guide for the proper installation and operation of your water heater
and the manufacturer of this water heater will not accept any liability where these instructions have not been fol-
lowed. However, for your safety and to avoid damage caused by improper installation, this water heater must be
installed by a Certified Licensed Professional and meet all local codes or, in the absence of local codes, CAN/
CSA B149.1, Natural Gas and Propane Gas Installation Code, in Canada and/or the National Fuel Gas Code,
ANSI Z223.1/NFPA 54, in the United States.
Before proceeding with the installation instructions:
1) Inspect the water heater and its component parts for possible damage. DO NOT install or attempt to
repair any damaged component parts. If you detect any damage, contact the dealer where the water
heater was purchased or the manufacturer listed on the warranty card.
2) Verify that the type of gas being supplied corresponds to what is marked on the rating plate and gas
control valve of the water heater.

5
Combustion and ventilation air requirements are
determined by where the water heater is to be located.
Water heaters are installed in either open (unconfined)
spaces or smaller (confined) spaces, such as closets or
small rooms.
Requirements for Unconfined Spaces
An unconfined space is an area with at least fifty (50)
cubic feet for each 1,000 BTUH (4.8 m3/kW) of the
total input rating for all gas appliances installed in that
space. Water heaters installed in unconfined spaces
do not usually require outdoor air to function properly.
However, in buildings with tight construction (heavy
insulation, vapour barriers, weather stripping, etc.) and
particularly in modern buildings, additional fresh air
may need to be provided. For instructions on obtaining
additional air supply, see the requirements below for
confined spaces.
Requirements for Confined Spaces
A confined space is an area where the volume is less
than fifty (50) cubic feet for each 1,000 BTUH (4.8
m3/kW)
of the total input rating for all gas appliances
installed in that space. Water heaters installed in con-
fined spaces require additional air. This can be pro-
vided in two ways:
In Canada (refer to CAN/CSA B149.1)
1)All Air From Inside the Building (see Figure 2):
The confined space shall be provided with
one opening of one (1) square inch per 1,000 BTUH
(22.0 cm2/kW) communicating directly with one or
more rooms of sufficient volume, so that the com-
bined volume of all spaces meets the criteria for an
unconfined space for all the appliances installed in
that confined space.
Confined Space
Permanent
Opening
--------------
1 square inches /
1000 BTUH
Figure 2
2)All Air From Outdoors: (see Figure 3):
An air supply shall be provided with one opening that
communicates directly with the outdoors by means
of a duct. This duct shall be sized according to CAN/
CSA B149.1 and terminate within one (1) foot (30.5
cm) above and within two (2) feet (61 cm) horizontally
from the burner level of the appliance having the
largest input.
Confined Space
Inlet air duct
18''
24''
Figure 3
In U.S.A. (refer to ANSI Z223.1/NFPA 54)
1) All Air From Inside the Building (see Figure 4):
The confined space shall be provided with two
permanent openings communicating directly with
one or more rooms of sufficient volume, so that
the combined volume of all spaces meets the
criteria for an unconfined space. The total input
rating of all gas appliances installed in the
combined space shall be considered in making this
determination.
Each opening shall have a minimum free area of one
(1) square inch per 1,000 BTUH (22.0 cm2/kW) of the
total input rating of all gas appliances in the confined
space, but not less than one hundred (100) square
inches (645.16 cm2). One opening shall commence
within six (6) inches (15.2 cm) of the top and one within
six (6) inches (15.2 cm) of the bottom of the enclosure.
2) All Air From Outdoors:
The confined space shall be provided with two
permanent openings, one commencing within six
(6) inches (15.2 cm) of the top and one commencing
within six (6) inches (15.2 cm) from the bottom of the
enclosure. The openings shall communicate directly
or by ducts, with the outdoors or spaces (crawl or
attic) that freely communicate with the outdoors.
Figure 4
INSTALLATION INSTRUCTIONS

6
A) When communicating directly with the outdoors,
each opening shall have a minimum free area of one
(1) square inch per 4,000 BTUH (5.5 cm2/kW) of the
total input rating of all gas appliances in the enclo-
sure (see Figure 5).
B) When communicating with the outdoors through
vertical ducts, each opening shall have a minimum
free area of one (1) square inch per 4,000 BTUH (5.5
cm2/kW) of the total input rating of all gas appliances
in the enclosure (see Figure 6).
C) When communicating with the outdoors through
horizontal ducts, each opening shall have a mini-
mum free area of one (1) square inch per 2,000
BTUH (11.0 cm2/kW) of the total input rating of
all gas appliances in the enclosure (see Figure 7).
When ducts are used, they shall be of the same
cross-sectional area as the free area of the openings to
which they connect. The minimum short side dimension
of rectangular air ducts shall not be less than three (3)
inches (7.6 cm).
Louvers and Grilles
In calculating free area for ventilation and combustion
air supply openings, consideration must be given to the
blocking effect of louvers, grilles or screens protecting
the openings. Screens must not be smaller than 1/4inch
(6.4 mm) mesh. If the free area through a particular
design of louver or grille is known, it should be used in
calculating the size of opening required to provide the
free area specified. If the design and free area is not
known, it may be assumed that wood louvers and grilles
will allow 20-25% free area and metal louvers and grilles
will allow 60-75% free area. Louvers and grilles must
be installed in the open position or interconnect-
ed with the water heater so that they are opened
automatically during water heater operation.
Corrosive Atmospheres
If this water heater is to be installed in a beauty
shop, barber shop, photo processing lab, dry cleaning
establishment, a building with an indoor pool, or
near a chemical storage area, it is imperative that
the combustion and ventilation air be drawn from
outside these areas. These particular environments
contain products such as aerosol sprays, detergents,
bleaches, cleaning solvents, refrigerants, and other
volatile compounds that, in addition to being highly flam-
mable, become highly corrosive acid compounds when
burned. Exposure to such compounds can be hazardous
and lead to premature product failure.
Should the water heater fail, due to exposure to
such a corrosive atmosphere, the warranty is void.
INSTALLATION INSTRUCTIONS
Figure 7
Figure 6
Figure 5

7
Venting
DANGER
When installing the venting system, make sure to follow all
local codes or, in the absence of local codes, CAN/CSA
B149.1, Natural Gas and Propane Gas Installation Code,
in Canada and/or the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, in the United States. Never operate the
water heater unless it is properly ventilated to the outdoors
and has adequate air supply for proper operation. Failure
to properly install the venting system could result in prop-
erty damage, personal injury, or death.
According to the CAN/CSA-B149, Natural Gas and
Propane Installation Code, plastic vent systems
installedinCanadamustbecertifiedtotheSTANDARD
FORTYPE BH GASVENTING SYSTEMS,ULC S636.
Components of the certified vent system must not be
interchanged with other vent systems or unlisted pipe/
fittings. Plastic components and specified primers and
glues of the certified vent system must be from a sin-
gle vent system manufacturer and not intermixed with
other vent system manufacturer’s vent system parts
unless those are certified to be used with this system.
Plastic vent systems shall also be installed such that
the first three (3) feet (91 cm) of pipe from the water
heateroutletarereadilyaccessibleforvisualinspection.
IMPORTANT
This water heater can be vented using only one of the
following options:
• Two (2) inch (5.1 cm) or three (3) inch (7.6 cm) sched-
ule 40 PVC or CPVC pipe and fittings;
• Two (2) inch (5.1 cm) or three (3) inch (7.6 cm) poly-
propylene pipe and fittings from Centrotherm (Innoflue
single wall vent system);
InnoFlue
®
• Two (2) inch (5.1 cm) or three (3) inch (7.6 cm) poly-
propylene pipe and fittings from DuraVent (Polypro
single wall gas vent system).
PolyPro
®
Before installing the vent piping, make sure that the
vent system layout has been properly planned. Verify
that the location of the water heater respects all
clearances from combustible material, all venting
requirements (see Table 1) and that the vent terminal
will be installed as specified by all local codes or, in the
absence of local codes, CAN/CSA B149.1, Natural Gas
and Propane Installation Code, in Canada and/or the
National Fuel Gas Code, ANSI Z223.1/NFPA 54, in the
United States (see Figure 13).
This water heater is equipped with a power venter
that evacuates the products of combustion to the
outdoors. All models are shipped from the factory
with the power venter already installed.
This water heater must be vented directly to the outdoors,
either horizontally through the wall or vertically through
the roof. The venting must not be attached to an exist-
ing chimney or in common with any other appliance and
must not be insulated.
Venting Connection to the water heater
PVC PIPE:
A vent system adaptor should be installed when using
PVC pipes for venting this water heater (see Figure 9).
The vent system adaptor supplied with the water heater
is made of IPEX parts. If another manufacturer of pipe
is used to build the vent system, the vent system adap-
tor must be made from parts of that same manufac-
turer. To build the vent system adaptor, you will need a
23/8”(6.03cm)pieceofCPVCpipeandatwo(2)inch(5.1
cm)PVCcouplinggluedtogetherwiththepropercement.
CPVC PIPE:
The CPVC pipe must be inserted directly into the rubber
transition fitting on the outlet of the blower assembly.
Note: If your installation requires three (3) inch (7.6 cm)
pipe, you must start with two (2) inch (5.1 cm) pipe and
add a two (2) to three (3) inch (5.1 to 7.6 cm) increaser
to change the size of the pipe to three (3) inches (7.6 cm)
(see Figure 9).
POLYPROPYLENE PIPE FROM CENTROTHERM
(Innoflue single wall vent system):
InnoFlue
®
Use special appliance adapter from Centrotherm and
insert into the rubber transition fitting on the outlet of
the blower assembly. Refer to the Table 2 and Figure
10 below for proper part number from Centrotherm. On
the three (3) inch (7.6 cm) vent pipe, an increaser is
necessary.
Table 2 — Centrotherm™
Appliance adapter Increaser
2-inch (5.1 cm) pipe ISAA0202 N/A
3-inch (7.6 cm) pipe ISAA0202 ISIA0203
INSTALLATION INSTRUCTIONS
Table 1 MAXIMUM EQUIVALENT LENGTH OF VENT PIPE - DO NOT EXCEED
PV1 Models only UG40, UG50, and UG60
VENT PIPE DIAMETER 2 inches (5.1 cm) 3 inches (7.6 cm)
Maximum equivalent length* 50.0 feet (15.2 m) 140.0 feet (42.7 m)
Minimum equivalent length* 7.5 feet (2.3 m) 9.5 feet (2.9 m)
One 45˚ elbow is equivalent, in straight pipe, to 3.0 feet (0.9 m) 4.0 feet (1.2 m)
One 90˚ elbow is equivalent, in straight pipe, to 5.0 feet (1.5 m) 7.0 feet (2.1 m)
* Note: Outdoor termination elbow not to be counted when determining total length.

8
INSTALLATION INSTRUCTIONS
Vent System Adaptor
Blower Assembly Outlet
Drain Outlet
Rubber
transition tting
Vent System Adaptor
Blower Assembly Outlet
Drain Outlet Rubber
transition tting
Increaser
Adaptor 2”X 3”
Figure 9
Connection
to a 3-inch (7.6 cm)
vent system
Connection
to a 2-inch (5.1 cm)
vent system
The blower assembly must always have the two (2) inch (5.1 cm) rubber transition fitting. An increasing
coupling ” X 3” is necessary for a three (3) inch (7.6 cm) venting system. This coupling must be installed as
close as possible after the rubber transition fitting and in every case, before the first elbow.
1/4”/foot (21 mm/m)
or as per manufacturer
specifications
Figure 8

9
POLYPROPYLENE PIPE FROM DURAVENT
(Polypro single wall gas vent system):
PolyPro
®
Use special appliance adapter from DuraVent and insert
into the vent system adaptor on the outlet of the blower
assembly. Refer to the Table 3 and Figure 11 below for
proper part number from DuraVent. On the three (3) inch
(7.6 cm) vent pipe, an increaser is necessary. Make sure
to use the Appliance Adapter clamp to connect the PolyPro
Appliance Adaptor to the Vent System Adaptor and to
tighten both hose clamps on the Appliance Adapter Clamp
to ensure the connection is secure.
Table 3 — DuraVent™
Appliance
adapter Increaser Appliance
adapter
clamp
2-inch (5.1 cm) pipe 2PPS-AD N/A PPS-PAC
3-inch (7.6 cm) pipe 2PPS-AD 2PPS-X3 PPS-PAC
Through-the-Wall Venting Installation
Cut or drill a hole through the exterior wall, slightly larger
than the diameter of the vent pipe selected. The larger
hole will allow for final alignment with the water heater.
Extend a section of the pipe through the hole to the
outside and attach the terminating elbow to the exte-
rior end of the pipe. Connect and secure all piping and
elbows from the power venter to the wall. When the
installation is completed, the vent terminal must be at
two (2) inches (5.1 cm) from the exterior surface of the
wall (see Figure 8). Make sure that all piping is prop-
erly braced. If the venting will pass through an enclosed
area, make sure to leave at least one (1) inch (2.5 cm)
clearance around the piping for air circulation.
FOR PVC AND CPVC PIPING:
Make sure that all horizontal runs have a minimum
rise of 1/4 inch per foot (21 mm/m) of run (see Figure
8). Horizontal runs of vent pipe must be supported
every three (3) feet (91 cm).
FORPOLYPROPYLENEPIPEFROMCENTROTHERM
(Innoflue single wall vent system):
InnoFlue
®
Make sure that all horizontal runs have a minimum
rise of 5/8” inch per foot (56 mm/m) of run. Follow
instruction of the vent pipe manufacturer for proper
vent support.
FOR POLYPROPYLENE PIPE FROM DURAVENT
(Polypro single wall gas vent system):
PolyPro
®
Make sure that all horizontal runs have a minimum
rise of 1/4” inch per foot (21 mm/m) of run. Follow
instruction of the vent pipe manufacturer for proper
vent support.
Through-the-Roof Venting Installation
Cut or drill a hole through the roof and ceiling, slightly
larger than the diameter of the vent pipe selected. The
larger hole will allow for the final alignment with the
water heater. Construct the vent terminal assembly.
Extend a section of pipe through the hole in the roof
to the outside and attach the terminal assembly to the
exterior end of the pipe. Connect and secure all piping
and elbows from the power venter to the roof. When
the installation is completed, the vent terminal must be
a minimum of eighteen (18) inches (45.7 cm) from the
exterior surface of the roof (see Figure 8). Make sure
that all piping is properly braced. If the venting will pass
through an enclosed area, make sure to leave at least
one (1) inch (2.5 cm) clearance around the piping for
air circulation.
FOR PVC AND CPVC PIPING:
Make sure that all horizontal runs have a minimum
rise of 1/4 inch per foot (21 mm/m) of run (see Figure
8). Horizontal runs of vent pipe must be supported
every three (3) feet (91 cm) and vertical runs of vent
pipe must be supported every five (5) feet (1.5 m).
FORPOLYPROPYLENEPIPEFROMCENTROTHERM
(Innoflue single wall vent system):
InnoFlue
®
Make sure that all horizontal runs have a minimum
rise of 5/8” inch per foot (56 mm/m) of run. Follow
instruction of the vent pipe manufacturer for proper
vent support.
INSTALLATION INSTRUCTIONS
Appliance adaptor
2” venting
3” venting
Increaser
Figure 10 — InnoFlue® Centrotherm
2” venting
3” venting
Appliance adaptor
Vent System Adaptor
Appliance
Adaptor
Clamp
Appliance
Adaptor Clamp
Increaser
Figure 11 — PolyPro® DuraVent

10
INSTALLATION INSTRUCTIONS
FOR POLYPROPYLENE PIPE FROM DURAVENT
(Polypro single wall gas vent system):
PolyPro
®
Make sure that all horizontal runs have a minimum
rise of 1/4” inch per foot (21 mm/m) of run. Follow
instruction of the vent pipe manufacturer for proper
vent support.
Pipe Assembly
WARNING
ALWAYS read and abide by all safety messages
printed on the primer, cleaner and cement contain-
ers. Primer, cleaner and cements are extremely
flammable. DO NOT store these products near heat,
sparks or flames. They are harmful or fatal if swal-
lowed. Their vapours are also harmful. They may
irritate eyes and can be absorbed through the skin.
Failure to follow these instructions can result in prop-
erty damage, personal injury, or death.
PVC & CPVC VENT SYSTEM:
1) Adjust the vent pipe length to properly fit the vent sys-
tem adaptor on the blower assembly outlet.
2) Cut pipe ends squarely, removing all burrs and dirt.
3) Dry fit the pipe/fitting to be connected to make sure
they fit properly.
4) Clean the pipe/fitting with the proper primer or cleaner.
5) Apply a thin coat of cement to the fitting, avoiding
puddling inside.
6) Apply a liberal coat of cement to the vent pipe, leav-
ing no voids.
7) QUICKLY assemble parts while cement is fluid! If
you wait too long, re-coat pipe/fitting.
8) Push the vent pipe completely into the coupling,
turning as it goes until it bottoms out.
9) Hold pipe and fitting together for thirty (30) seconds. Then
carefully clean off any excess material with a cloth. Allow
connections a sufficient time to cure before disturbing.
10)Loosen the upper hose clamp on the rubber transition
fitting and fully insert the CPVC pipe of the vent system
adaptor (1” [2.5 cm] deep). Do not apply cement to the
rubber transition fitting.
Figure 12
1) Vent pipe
2) Power vent assembly
3) Union
4) Cold water
manual shut-off valve
5) Cold water inlet
6) Expansion tank
7) Temperature
and pressure-relief valve
8) Overflow tube
9) Drain valve
10) Combustion
air intake holes
11) Drain pan
12) Free-flowing floor drain
13) Sight glass
14) Resettable Thermal Switch
15) Outer access door
16) Inner access door
17) Flammable vapour sensor
18) Cap
19) Drip leg (Sediment trap)
20) Gas supply
manual shut-off valve
21) Union
22) Gas control valve
23) Rating plate
24) Dip-tube
25) 12’ Power cord (3.86 m)
26) Hot water outlet
27) Union
28) Flame sensor
29) Ignitor
30) Burner orifice
31) Burner
2
5
6
34
7
8
24
910
11
16
14
15 13 12
21
17
18
20
19
22 23
25
27
26
31
29
28
30
1Minimum Slope
1/4”/foot (21mm/m)

11
*Clearance in accordance with local installation codes and the requirements of the gas supplier.
For Canadian and U.S. installations, the vent shall not terminate above a paved driveway that is located between two single family dwellings and serves both dwell-
ings.
** The veranda, porch, or deck is fully open on a minimum of two sides beneath the floor.
*** The vent terminal must terminate at least four (4) feet (1.22 m) below, four (4) feet (1.22 m) horizontally from or one (1) foot (30 cm) above any door, window,
and gravity air inlet to the building.
**** The vent terminal must terminate at least three (3) feet (91cm) above any forced air inlet duct located within ten (10) feet (3.05 m).
Figure 13
INSTALLATION INSTRUCTIONS
The Vent Termination must have a:
Canadian Installations U.S. Installations
A) Clearance above grade, veranda, porch, deck, or balcony. 12 inches (30 cm) 12 inches (30 cm)
B) Clearance to window or door that may be opened. 12 inches (30 cm) * * *
C) Clearance to outside corner. **
D) Clearance to inside corner. *3 feet (91 cm)
E) Clearance to service regulator vent outlet. 3 feet (91 cm) 6 feet (1.82 m)
F) Clearance to each side of center line extended above
meter/regulator assembly. 3 feet (91 cm) within a height of 15 feet (4.57 m)
above the meter/regulator
assembly
3 feet (91 cm) within a height
of 15 feet (4.57 m)
above the meter/regulator
assembly
G) Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance. 12 inches (30 cm) * * *
H) Clearance to a mechanical air supply inlet. 6 feet (1.82 m) * * * *
I) Clearance above paved sidewalk or paved driveway
located on public property. 7 feet (2.13 m) 7 feet (2.13 m)
•
Clearance under veranda, porch, deck, or balcony.** 12 inches (30 cm) Shall not
• Clearance to permanently closed window.*
• 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.*
• Clearance to unventilated soffit.*

12
INSTALLATION INSTRUCTIONS
11)Tighten the upper hose clamp to ensure the vent pipe
is firmly secured and gas tight.
12)Make sure that the lower hose clamp is firmly seated,
secured and gas tight. Gently move the vent pipe side
to side and vertically to ensure that it is securely in
place and that there is no slippage.
POLYPROPYLENE PIPE:
PolyPro
®
InnoFlue
®
Follow the vent pipe manufacturer installation instruc-
tions to assemble the vent pipe. Make sure to secure
the vent pipe sections together using the mean (con-
nector ring or locking band) as specified by the vent
pipe manufacturer.
Vent Termination through-the-wall
PVC & CPVC VENT SYSTEM:
A 45-degree PVC elbow is supplied with the water
heater and shall be used as the termination elbow for
through-the-wall installation when the vent system is
built with PVC pipes. If CPVC is used to build the vent
system, use a 45-degree CPVC elbow that is approved
to be used with the vent system. A wire mesh screen
must be installed in the termination elbow.
POLYPROPYLENE
VENT SYSTEM:
PolyPro
®
InnoFlue
®
A 45-degree Polypropylene elbow, approved to be
used with the vent system shall be used as the termi-
nation elbow for through-the-wall installation. Be sure
to remove the wire mesh screen that was supplied with
the 45-degree PVC elbow and insert it into the poly-
propylene elbow. Push the screen until it locks in place
inside the elbow.
Vent Termination Through-The-Roof
PVC & CPVC VENT SYSTEM:
A 90-degree elbow (not supplied) shall be used as the
termination elbow for Through-the-Roof installation (see
Figure 8). Use a 90-degree elbow that is made of the
same material as the vent system and approved to be
used with this vent system. Be sure to remove the wire
mesh screen that was supplied with the 45-degree PVC
elbow and insert it into the 90-degree elbow. Push the
screen until it locks in place inside the elbow.
POLYPROPYLENE
VENT SYSTEM:
PolyPro
®
InnoFlue
®
A 90-degree Polypropylene elbow, approved to be used
with the vent system shall be used as the termina-
tion elbow for through-the-roof installation. Be sure to
remove the wire mesh screen that was supplied with the
45-degree PVC elbow and insert it into the polypropyl-
ene elbow. Push the screen until it locks in place inside
the elbow.
Restrictor Screens
For Energy Star Models only
A restrictor screen (see Figure 14) is provided with the
following Energy Star models (see Table 4).
Figure 14
Table 4
Natural Gas Propane Gas
UG40-40LFPV1-N2U UG40-38LFPV1-P2U
UG50-40LFPV1-N2U UG50-38LFPV1-P2U
PVC & CPVC VENT SYSTEM:
A black restrictor screen (see Figure 14) is provided with
thefollowingEnergyStarmodels(see Table 4).Whenthe
totalequivalentventlengthisthirty(30)feet(9.1m)orless
of two (2) inch (5.1 cm) vent pipe, the wire mesh screen
shall be removed from the vent termination elbow and the
two (2) inch (5.1 cm) restrictor screen must be installed
and glued. Otherwise, a standard wire mesh screen
shall be installed. When using three (3) inch (7.6 cm)
vent pipe, a standard wire mesh (supplied with the water
heater) must be installed in all cases (see Table 5).
POLYPROPYLENE
VENT SYSTEM:
PolyPro
®
InnoFlue
®
A grey restrictor screen (see Figure 14) is provided with
the following Energy Star models (see Table 4). When
the total equivalent vent length is thirty (30) feet (9.1 m)
or less of two (2) inch (5.1 cm) vent pipe, the two (2) inch
(5.1 cm) restrictor screen must be installed. Otherwise, a
standard wire mesh screen shall be installed. To install
Table 5 (for Energy Star Models Only)
VENT DIAMETER TERMINATION 0’ - 30’ 30’ - 50’
2” (5.1 cm) 45˚ ELBOW
VENT DIAMETER TERMINATION 0’ - 30’ 30’ - 140’
3” (7.6 cm) 45˚ ELBOW

13
INSTALLATION INSTRUCTIONS
the restrictor screen, remove the gasket at the end of the
termination elbow and insert the restrictor screen. Push
firmly the screen into the elbow pass the gasket groove.
Put the gasket back into place. When using three (3)
inch (7.6 cm) vent pipe, a standard wire Mesh (supplied
with the water heater) must be installed in all cases (see
Table 5).
Condensation in the Venting System
In some installations, condensation will form in the hori-
zontal runs of vent piping. To prevent condensation from
flowing back into the power venter, install a condensate
trap to the drain outlet of the rubber transition fitting (see
Figure 9). Make sure that the condensate removal tube
flows to a suitable free-flowing drain.
Water Piping
Refer to Figure 12 for a typical installation. Use of this
layout should provide a trouble-free installation for the life
of the water heater. Before making the plumbing connec-
tions, locate the COLD water inlet and the HOT water
outlet. These fittings are both 3/4” N.P.T. male thread.
Make sure that the dip tube is installed in the cold water
inlet. Install a shut-off valve close to the water heater in
the cold water line. It is recommended that unions be
installed in the cold and hot water lines so that the water
heater can be easily disconnected, if servicing is required.
When assembling the hot and cold piping, use a good
food grade of pipe joint compound and ensure all fit-
tings are tight. It is imperative that open flame is not
applied to the inlet and outlet fittings, as heat will
damage or destroy the plastic-lined fittings.
This will
result in premature failure of the fittings, which
is not covered by the warranty.
Temperature and Pressure-Relief Valve
WARNING
DO NOT plug the temperature and pressure-
relief valve or its discharge line. DO NOT remove
the relief valve. Make sure the relief valve is
properly sized for the water heater. If the relief valve
continuously discharges water, call a qualified
service technician to correct the problem. Failure to
follow these instructions can result in property
damage, personal injury, or death.
To protect from excessive pressure and/or tempera-
ture, the manufacturer has installed a temperature and
pressure-relief valve that meets the requirements of
the Standard for Relief Valves and Automatic Gas
Shut-Off Devices for Hot Water Supply Systems,
CSA 4.4, in Canada and ANSI Z21.22, in the United
States. This relief valve has a maximum set pres-
sure that does not exceed the hydrostatic working
pressure of the water heater (150 psi = 1,035 kPa) and
a BTU/hr rating equal to or greater than the input rating,
as shown on the water heater rating plate. It should never
be plugged or removed from the opening marked for it on the
water heater.
If this relief valve should need to be replaced, use only
a new temperature and pressure-relief valve. Never
install an old or existing relief valve, as it may be
damaged or inadequate for the working requirements of
the new water heater. This new relief valve must meet
all local codes or, at a minimum, the requirements listed
above. Never install any other type of valve between the
relief valve and the water heater.
A discharge line must be installed into the relief valve.
The discharge line:
• Must not be smaller than the outlet pipe size of the
relief valve.
• Must not terminate less than six (6) inches (15.2 cm)
and not more than twelve (12) inches (30.5 cm) above
a floor drain.
• Must not be restricted in any way. Do not thread, cap,
or in any way restrict the end of this outlet.
• Must be of a material capable of withstanding 210oF
(99oC) without distortion.
• Must be installed to allow complete drainage of the
relief valve and discharge line.
• Must terminate at an adequate free-flowing drain.
Pressure Build-up in a Water System
When the water heater operates, the heated water
expands creating a pressure build-up. This is a
natural function and is one of the reasons for installing a
temperature and pressure-relief valve. If the cold water
supply line has a built-in water meter, check valve or
pressure-reducing valve, a suitable expansion tank must
be installed to prevent pressure build-up or water hammer
effect. Otherwise, the warranty is void (see Figure 12). An
indication of pressure build-up is frequent discharges of
water from the relief valve. If the relief valve discharges
water on a continuous basis, it may indicate a malfunction
of the relief valve and a qualified service technician must
be called to have the system checked and the problem
corrected.
Filling the Water Heater
Check that all of the water piping connections have been
made. To fill the water heater:
1) Make sure that the water heater drain valve is closed
by inserting a flat head screwdriver into the slot on the
head of the drain valve and turning the knob clockwise
.

14
2) Open the cold water supply manual shut-off valve. This
valve must remain open, as long as the water heater is
in use. NEVER operate the water heater with the cold
water supply manual shut-off valve closed.
3) To make sure the water heater is completely full of
water, open all of the hot water faucets in the house
to let the air out of the water heater and plumbing
system. Leave the faucets open until a constant flow
of water is obtained.
4) Check all of the plumbing connections to make sure
there are no leaks.
WARNING
NEVERoperatethewaterheaterunlessitis complete-
ly filled with water. Failure to follow this instruc-
tion can result in premature failure of the water
heater that is not covered by the warranty.
Gas Connections
WARNING
DO NOT attempt to use this water heater with
any gas other than the type of gas shown on
the water heater rating plate. Failure to follow
this instruction can result in property damage, per-
sonal injury, or death.
The gas piping must be installed as indicated in
Figure 12. For the correct size of piping for this water
heater, consult CAN/CSA B149.1, National Gas and
Propane Installation Codes (in Canada) and/or the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
in the United States. Only new piping with cleanly
cut threads may be used, together with a suitable
sealing compound that is approved for natural and pro-
pane gases. It is mandatory that a readily accessible man-
ual shut-off valve be installed in the gas supply line. The
gas supply manual shut-off valve must be close to the
water heater. A drip leg (sediment trap) must be installed
in the gas line ahead of the gas control valve to prevent
dirt from entering it. A union must be installed between
the gas control valve and the gas supply manual shut-off
valve for easy maintenance of the water heater.
WARNING
NEVER use an open flame to test for gas leaks. A fire
or explosion could occur resulting in property dam-
age, personal injury, or death.
The water heater and its gas connection must
be leak tested before placing the appliance into opera-
tion. To leak test the system:
1) Turn on the manual gas shut-off valve near the
water heater.
2) Use a soapy water solution to test all connections
and fittings for leaks. Bubbles indicate a gas leak.
3) Correct all leaks.
Make sure that the inlet pressure to the water heater does
not exceed 1/2psi (3.5 kPa) for both natural and propane
gases. Pressures in excess of 1/2psi (3.5 kPa) can damage
the gas control valve, resulting in a fire or explosion from
leaking gas. For purposes of adjustment, the minimum inlet
pressure is indicated on the water heater rating plate.
If any pressure testing of the gas line is under-
taken at test pressures in excess of 1/2psi (3.5 kPa),
the water heater and its gas supply manual shut-off
valve must be disconnected from the gas supply
piping system and the end of the pipe sealed with a
female cap. If the testing is to be undertaken at a test
pressure less than 1/2psi (3.5 kPa), the gas supply man-
ual shut-off valve must be closed.
WARNING
U.L. and CSA recognized fuel gas and Carbon
Monoxide(Co)detectorsarerecommendedinallappli-
cations and should be installed using the manufactur-
er’s instructions and local codes, rules or regulations.
Installation Instructions for Water Heaters
Approved for Space Heating and
Potable Water Heating (see Figure 15)
A water heater cannot be used for space heating
application only. When using a water heater for space
and potable water heating, the instructions provided
in this manual and with the air-handling unit must be
respected and, in particular, the following:
1) All piping and components that are used in the
system must be of a nonferrous type suitable for
potable water. This also applies to any sealant used.
2) When used as a dual purpose water heater, it must
not be connected to any system that has been previ-
ously used for non-potable water heating. This includes
any piping because, in all probability, existing piping
would have been, in the past, treated with chemicals
for cleaning or sealing the system.
3) If this water heater is to be used for space heating,
make sure that all safety codes are respected. Pay
special attention to safety valve pressure and expan-
sion tanks.
4) Do not use toxic chemicals to clean the potable
water heating system.
5) Where water temperature in excess of 140oF (60oC)
is required for a space heating application, a mixing
valve must be installed in the potable side of the
system. This will temper the water and reduce the
risk of scalding.
INSTALLATION INSTRUCTIONS

15
6) If the incoming water line to the heater is
equipped with a check valve, water meter or
pressure-reducing valve, an expansion tank
must be installed in the system. This will prevent
weeping from the water heater relief valve and pre-
mature failure of the heater due to expansion of the
water during the heating cycle.
7) Before acquisition of a water heater for space
heating application, it is necessary to have
the area of intended use sized by a qualified
technician. This will ensure that an adequate water
heating capacity will be available for both heating
and potable water supply and that the application
will meet all local codes and public utility require-
ments.
Note: It is good practice to oversize the water heater,
to ensure that all of the potential hot water require-
ments are available.
Check Valve
Inlet from
the space heating
circuit
Outlet to the
space heating
circuit
Circulation Pump
Cold water supply
to water heater
Hot water
to house
Air handler
Water heater
Figure 15
INSTALLATION INSTRUCTIONS

16
OPERATING INSTRUCTIONS
Blower Unit
High Limit Switch
Vacuum Switch (N.O.)
Yellow
Red
Power Cord
White
Black
Green
Black
White
Green
Blue
Yellow
Red
Yellow
Blue
Hot Surface Igniter
Flame Sensor
Flammable Vapor Sensor
Gas Control
White
Black
Green
High Limit Switch
(Access Door)
M
5
3
4
1
6
2
5
3
4
1
6
2
Wiring Diagram
for Models UG40, UG50, UG60
Figure 16
Wiring
WARNING
This water heater uses an external electrical source
for power. It must be electrically grounded in accor-
dance with all local codes or, in the absence of local
codes, CSA C22.1 Canadian Electrical Code, in
Canada and/or the National Electrical Code, ANSI/
NFPA 70, in the United States. Failure to properly
ground this water heater can result in property dam-
age, personal injury, or death.
Before lighting your water heater, check that all of the
wires have been installed correctly (see Figure 16).
Make sure that none of the wires are grounded, have
split or are broken. Verify that all wiring connections
are
properly secured, as there is a possibility that they have
become loose during transportation. If any of the origi-
nal wiring needs replacing, use only 18AWG-type or
greater wire that is approved for 221oF (105oC).

17
OPERATING INSTRUCTIONS
Installation Checklist
Location
• Is the water heater located within the venting requirements and close to the main use of hot water?. . . . . . .
• Is the water heater protected from freezing temperatures?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Has a drain pan been installed and piped to a free-flowing drain? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Is the gas control valve accessible for servicing? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Have clearances from combustible materials been observed? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion and Ventilation Air Supply
• Is the area around the water heater clean and properly ventilated? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Is the fresh air supply free of corrosive elements and flammable vapours? . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Does the water heater have access to enough fresh combustion air? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Have the fresh air openings been sized correctly and
has consideration been given to the blocking effect of louvers and grilles? . . . . . . . . . . . . . . . . . . . . . . . . . . .
Venting
• Is the flue baffle installed in the flue tube?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Has the water heater been vented separately from all other appliances?. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Has the vent piping been assembled with pipes & fitings from the same manufacturer?. . . . . . . . . . . . . . . . .
• Have all horizontal runs of vent pipe been installed with a minimum rise as specified?. . . . . . . . . . . . . . . . . .
• Has all the vent piping been secured with the appropriate primer and solvent-based cement?. . . . . . . . . . . .
• Has the venting been supported at the proper intervals? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Have precautions been taken against condensation flowing into the power venter? . . . . . . . . . . . . . . . . . . . .
Water Piping
• Is the dip-tube installed in the cold water inlet?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Has a temperature and pressure-relief valve been installed? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Does this valve have a discharge line installed and is it piped to a free-flowing drain? . . . . . . . . . . . . . . . . . .
• Have all the plumbing connections been properly installed and are they leak-free?. . . . . . . . . . . . . . . . . . . . .
• Is the water heater full of water? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Connections
• Is the gas supplied to the water heater the same type as indicated on the water heater rating plate? . . . . . .
• Has the gas line been installed with a manual shut-off valve, union and drip leg?. . . . . . . . . . . . . . . . . . . . . .
• Is the gas piping large enough and made of an approved material?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Have all connections been made with an approved joint compound?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Has the gas piping been tested for leaks with a soap and water solution?. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring
• Has the wiring been properly installed?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Have the electrical connections been checked and are they secure?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Is the water heater electrically grounded? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Does the 120V wall receptacle have the proper polarity? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18
Lighting the Water Heater
Before lighting or re-lighting your
water heater, make sure that you
have read and understood all of
the instructions and warnings in this
manual and on your water heater. If
you have any questions about light-
ing your water heater, immediately contact a qualified
installer, service agency or the gas supplier.
WARNING
DO NOT light this water heater if:
• It is not full of water.
• The gas supplied does not match the type
listed on the rating plate.
• Gasoline or other flammable vapours and
liquids have been stored in the vicinity of the
water heater.
Failure to follow these instructions can result in
property damage, personal injury, or death.
OPERATING INSTRUCTIONS
Lighting Instructions

19
GENERAL MAINTENANCE
Water Temperature Regulation
WARNING
The higher the setting, the greater the risk of
scalding. Hot water can cause third degree burns
in under one (1) second at 160oF (71oC), in five (5)
seconds at 140oF (60oC) and in thirty (30)
seconds at 130oF (54oC). In households where
there are children, physically challenged individuals
or seniors, mixing valves for point of use are nec-
essary as means of reducing the scalding potential
of hot water.
The gas control valve is factory-adjusted to its low-
est temperature, approximately 70oF (21oC). When
the water heater is plugged in for the first time, the
gas control valve will start to heat the water to this
temperature. To avoid any unintentional changes in
the water temperature settings, the gas control valve
has a tamper resistant feature included for changing
the temperature setting. If you want to change this
setting for either cooler or warmer water, the following
steps are necessary:
FLASHING
APPROXIMATE
TEMPERATURE
˚F (˚C)
70 (21)
(Vacation)
110 (43)
115 (46)
120 (49)
125 (52)
130 (54)
135 (57)
140 (60)
145 (63)
150 (66)
160 (71)
APPROXIMATE
TIME TO
CAUSE INJURY
N/A
5 Minutes
30 Seconds
5 Seconds
1.5 Seconds
Under 1 Second
DISPLAY
Figure 17
1. “Wake up” the temperature indicators by holding
down both the COOLER and HOTTER temperature
adjustmentbuttonsatthesametimeforone(1)sec-
ond(seeLightingInstructions).Oneortwoofthe
temperatureindicatorswilllightup.Theseindicators
will only remain on for thirty (30) seconds, if no fur-
ther buttons are pressed. After thirty (30) seconds,
the control will go back to “Sleep” mode and both
buttons will again have to be pressed to see the
water temperature setting. Release both of the
temperature adjustment buttons.
2. If this is the first time that the control has been
used, the leftmost green
indicator will be illumi-
nated, indicating the
water temperature set-
ting of approximately
70°F (21°C). If the control
has been in operation
for some time, the water
temperature setting may
indicate a different tem-
perature. See Figure 17
for an explanation of what
each of the temperature indicators mean.
To decrease the temperature, press and release
the COOLER button once. The temperature indica-
tors will now display the new temperature
setting. Press and release the COOLER button until
you have reached the desired setting.
HOLDING DOWN THE BUTTON WILL NOT
CONTINUE TO LOWER THE SETTING. The
button must be pressed and released for each tem-
perature change desired.
To increase the temperature,pressandrelease
the HOTTER button once. The temperature
indicators will now display the new temperature
setting. Press and release the HOTTER but-
ton until you have reached the desired setting.
HOLDING DOWN THE BUTTON WILL NOT
CONTINUE TO RAISE THE SETTING. The
button must be pressed and released for each
temperature change desired.
To maximize the efficiency of this water heater and
reduce the risk of scalding, it is recommended that
the gas control valve be set at the setting below the
large triangle
(« ») , which represents approximately
120°F (49°C).
3. When you have completed setting the control, wait
thirty (30) seconds to see that the temperature
indicators go off and the control enters “Sleep”
mode. ALL OF THE TEMPERATURE
INDICATORS WILL BE OFF DURING NORMAL
OPERATION. If at any time you see the indicators
on, there may be a system error and you should
consult the
Troubleshooting Guide of this document or
contact a trained service professional.
When hot water is drawn from the tank in frequent
short bursts, a condition known as “stacking” is
created. “Stacking” is the result of increased cycling of the
burner and can produce very hot water temperatures at
the hot water outlet. Always remember to check the hot
water coming out of any faucet with your hand before use.
This will reduce the risk of scalding-related injury.

20
The gas control valve pictured in this manual
is equipped with a single-use type automatic high
temperature cutoff. Should the temperature of the
water exceed 195oF (91oC), the high temperature
cutoff will automatically shut off the gas supply to the
water heater. If this situation occurs, the gas control
valve must be replaced immediately by a qualified
service technician. WARNING
Should overheating occur or the gas supply fail to
shut off, close the gas supply manual shut-off valve.
Failure to follow this instruction can result in property
damage, personal injury, or death.
Out of Fuel
If your water heater should run out of gas, proceed
as follows:
1) Unplug the power cord from the wall socket.
2) Close the gas supply manual shut-off valve.
3) Once the gas supply has been re-established,
proceed to the Lighting Instructions .
Housekeeping
Keep the area around the water heater clean and free of
dust, lint and dirt. Verify the combustion air intake holes,
at the bottom of the water heater, at least once every six
(6) months and vacuum up any dirt, as required. Make
sure that all of the minimum clearances to combustible
materials are being maintained.
WARNING
DO NOT store or use gasoline or other flammable
vapours and liquids around the water heater.
DO NOT block or, in any way, restrict the flow of
fresh air through the combustion air intake holes at
the bottom of the water heater.
DO NOT put or store any objects on the top of the
water heater.
Failure to follow these instructions can result in
property damage, personal injury, or death.
Safety System
This water heater is equipped with a safety system
that will shut it down in the event of a flammable
vapour incident. It is a safety feature that may prevent
property damage, personal injury, or death.
The safety system is comprised of two parts, a flam-
mable vapour (FV) sensor and the flame arrestor.
The FV sensor is located on the front left bottom of
the exterior casing of the water heater. The FV sen-
sor is protected from shock and contaminants by a
robust plastic cover. The function of the FV sensor is
to detect the presence of flammable vapours before
they enter the combustion chamber and ignite. If
the FV sensor detects the presence of flammable
vapours while the water heater is operating, the gas
control will switch to lock-out mode and the water
heater will shut down. If the water heater is not oper-
ating when the flammable vapours are detected, the
control will switch to lock-out mode and prevent the
water heater from lighting.
It is unlikely that there will ever be a flammable
vapour ignition in the combustion chamber as the
flammable vapours will have been detected by the
FV sensor. However, if flammable vapours manage
to enter the combustion chamber during main burner
operation and ignite, the flame arrestor technology
will prevent ignition of the vapours outside the
combustion chamber.
After a flammable vapour incident has occurred
and the flammable vapours have dissipated, the FV
sensor is designed to automatically reset itself. The
Intelli-Vent gas control, however, will have gone into
lock-out mode and will need to be manually reset. A
qualified service technician must be called to deter-
mine if flammable vapours entered the combustion
chamber and ignited. In most instances, there will
not have been ignition of flammable vapours inside
the combustion chamber because the FV sensor
will have detected these vapours and shut down the
water heater. In this case, the Intelli-Vent®gas control
can be reset and the water heater may resume nor-
mal operation. On the other hand, if the flammable
vapours ignited inside the combustion chamber, the
water heater may need to be replaced. The techni-
cian will be able to determine whether or not the
water heater needs to be replaced based on the
amount of flammable vapours that entered the com-
bustion chamber and the damage to the water heater
from the resulting fire.
Condensation
As moisture from the products of combustion comes
into contact with the cold surface of the inner tank, it
may condense. This situation will usually occur:
1) When the water heater is filled with cold water for
the first time.
2) If the water heater has been undersized.
3) When large amounts of hot water are drawn from
the water heater in a short period of time and the
refill water is very cold.
Due to the high-efficiency rating of this gas-fired
water heater, it may produce more condensation than
older models. Condensation forming on the flue tube
will drop on the burner making a “sizzling” sound. This
condition is not uncommon and must never be misin-
terpreted as a leaking tank. It will disappear once the
water becomes heated.
GENERAL MAINTENANCE