Lochinvar RPD-I-S User manual

POWERED DIRECT VENT GAS WATER HEATER
A Spanish language version of these instructions is available by contacting the
company listed on the rating plate.
La version espanola de estas instrucciones se puede obtener al escribirle a la
fabrica cuyo nombre aparece en la placa de especificaciones.
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.
Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier's instructions.
If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
For your family’s comfort, safety and convenience we recommend
this water heater be installed and serviced by a plumbing
professional.
INSTALLATION AND OPERATING INSTRUCTION MANUAL
FOR YOUR SAFETY
Do not store or use gasoline or other flammable,
combustible, or corrosive vapors and liquids in the
vicinity of this or any other appliance.
WARNING: If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or death.

RPD-I-S Rev A
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CONGRATULATIONS!
You have just purchased one of the finest water heaters on
the market today!
This installation, operation and instruction manual will
explain in detail the installation and maintenance of your
new Powered Direct Vent Gas Water Heater. We strongly
recommend that you contact a plumbing professional for
the installation of this water heater.
We require that you carefully read this manual, as well as
the enclosed warranty, and refer to it when questions arise.
If you have any specific questions concerning your
warranty, please consult the plumbing professional from
whom your water heater was purchased. For your records
we recommend that you write the model, serial number and
installation date of your water heater in the maintenance
section in the back of this manual.
This manual should be kept with the water heater.
Special Flammable Vapor Ignition Resistant System:
This water heater is equipped with a Flammable Vapor Ignition Resistant System. In
the event of improper usage or storage of gasoline or other flammable materials in
the location where the water heater is installed, the technology will resist ignition of
the flammable vapors outside the confines of the water heater.
The Flammable Vapor Ignition Resistant System features:
Flammable Vapor Sensor.
Automatic Ignition Device.
Sight Window to observe operation of pilot and burner.
FOR YOUR SAFETY: Activation of the Flammable Vapor Ignition Resistant System
occurs when flammable vapors are present in the room where the water heater is
installed. If flammable vapors are detected and/or sensed:
Do not try to light any appliance.
Do not touch any electrical switch; Do not use any phone in your building.
Leave the premises and immediately call the fire department from a
neighbor’s phone. Follow the fire department’s instructions.
Once the flammable vapor has been evacuated, contact your plumbing professional
or the manufacturer for further instructions. Replacement of a Flammable Vapor
Ignition Resistant System equipped water heater due to a flammable vapor
shutdown is not covered under the terms of the limited warranty.

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TABLE OF CONTENTS page
GENERAL INFORMATION................................................................. 4
INSTALLATION.................................................................................. 5
Locating The Water Heater......................................................... 5
Minimum Clearances .................................................................. 8
Venting......................................................................................... 8
Specifications for
48 Gal. (181.6 L)
65 Gal. (246.8 L)
75 Gal. (283.9 L)..................................................................... 11
Specifications for
40 Gal. (151.4 L)
50 Gal. (189.2 L)..................................................................... 21
Vent pipe preparation and joining ................................................... 30
Water Connections...................................................................... 31
Gas Connections......................................................................... 34
Electrical Connections................................................................ 35
Wiring Diagram...................................................................... 36
GENERAL OPERATION .................................................................... 37
Lighting and Shutdown Instructions......................................... 38
Thermostat Adjustment.............................................................. 39
Burner Flame Check ................................................................... 40
MAINTENANCE.................................................................................. 41
TROUBLESHOOTING........................................................................ 45
PARTS LIST AND PARTS LIST DRAWING ...................................... 47
INSTALLATION INSTRUCTIONS FOR POTABLE WATER AND
SPACE HEATING............................................................................... 48

RPD-I-S Rev A
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GENERAL INFORMATION
This gas-fired water heater’s design is certified by CSA International under the
American National Standard Z21.10.1 and CSA 4.1-M, most current editions at
the time of manufacture.
This water heater must be installed in accordance with local codes or, in the
absence of local codes, the National Fuel Gas Code, ANSI Z223.1-Latest
Edition) and/or in Canada CAN/CGA B149 Installation Codes (Latest Editions).
The warranty for this water heater is in effect only when the water heater is
installed, adjusted, and operated in accordance with these Installation and
Operating Instructions. The manufacturer will not be held liable for any damage
resulting from alteration and/or failure to comply with these instructions.
This water heater is not design certified for installation in a mobile home. Such
an installation may create a hazardous condition and will nullify the warranty.
Do not use this appliance if any external part has been submerged in water.
You should contact a qualified service technician to inspect the appliance and
to replace any part of the control system including the combination gas control
which has been submerged in water.
Make sure that you check the rating plate and combination gas control on the
water heater to be certain that the type of gas being supplied corresponds with
the marking on the rating plate and combination gas control.
CAUTION
Incorrect operation of this appliance may create a hazard to life and
property and will nullify the warranty.
DANGER
Do not store or use gasoline or other flammable, combustible, or
corrosive vapors and liquids in the vicinity of this or any other
appliance.
IMPORTANT
Before proceeding, please inspect the water heater and its components for
possible damage. DO NOT install any water heater with damaged
components. If damage is evident then please contact the supplier where
the water heater was purchased or the manufacturer listed on the rating
plate for replacement parts.

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General Information continued-
A sacrificial anode is used to extend tank life. The removal of this anode, for
any reason, will nullify the warranty. In areas where water is unusually active,
an odor may occur at the hot water faucet due to a reaction between the
sacrificial anode and the impurities in the water. If this should happen, an
alternative anode may be purchased from the supplier that installed this water
heater. This will minimize the odor while protecting the tank. Additionally, the
water heater should be flushed with appropriate dissolvers to eliminate any
bacteria.
INSTALLATION
Locating The Water Heater
DO NOT install the water heater in any location where gasoline or
flammable vapors are likely to be present.
Water heaters in residential garages must be installed and located, or
protected, to avoid physical damage. For other installations refer to local
codes. In the absence of local codes, the water heater must be installed
in compliance with the National Fuel Gas Code, (ANSI Z223.1- Latest
Edition), or in Canada CAN/CGA B149.1 Natural Gas Installation Code
(Latest Edition) or CAN/CGA B149.2 Propane Installation Code (Latest
Edition).
The location of this water heater is of the utmost importance. Before installing
this water heater, read the installation section of these instructions. After
reading these installation and operating instructions, select a location for the
water heater where the floor is level and is easily accessible to gas and water
supply lines. DO NOT locate the water heater where water lines could be
subjected to freezing temperatures. Make sure the cold water pipes are
not located directly above the gas control so that condensate during
humid weather does not drip on the controls.
WARNING
Water heaters are heat producing appliances. To avoid damage or injury, do
not store materials against the water heater or vent-air intake system. Use
proper care to avoid unnecessary contact (especially by children) with the
water heater and vent-air intake components. UNDER NO CIRCUMSTANCES
MUST FLAMMABLE MATERIALS, SUCH AS GASOLINE OR PAINT
THINNER BE USED OR STORED IN THE VICINITY OF THIS WATER
HEATER, VENT-AIR INTAKE SYSTEM OR IN ANY LOCATION FROM
WHICH FUMES COULD REACH THE WATER HEATER OR VENT-AIR
INTAKE SYSTEM.

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Installation (Locating The Water Heater) continued-
Water heater corrosion and component failure can be caused by the heating
and breakdown of airborne chemical vapors. Examples of some typical
compounds that are potentially corrosive are: spray can propellants, cleaning
solvents, refrigerator and air conditioning refrigerants, swimming pool
chemicals, calcium and sodium chloride, waxes and process chemicals. These
materials are corrosive at very low concentration levels with little or no odor to
reveal their presence. NOTE: DAMAGE TO THE WATER HEATER CAUSED
BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY THE
WARRANTY. DO NOT OPERATE THE WATER HEATER IF EXPOSURE
HAS OR WILL OCCUR. DO NOT STORE ANY POTENTIALLY CORROSIVE
COMPOUNDS IN THE VICINITY OF THE WATER HEATER.
To comply with NSF requirements this water heater is to be:
a) Sealed to the floor with
sealant, in a smooth
and easily cleanable
way, or
b) Installed with an
optional leg kit that
includes legs and/or
extensions that provide
a minimum clearance
of 6” beneath the water
heater.
WARNING
Liquefied petroleum gases/propane gas are heavier than air and
will remain at floor level if there is a leak. Basements, crawl
spaces, closets, and areas below ground level will serve as
pockets for accumulation of leaking gas. Before lighting, smell
all around the appliance area for gas. Be sure to smell next to
the floor.
IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electric switch; do not use any telephone in
your building.
Immediately call your gas supplier from a neighbor’s
telephone. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the fire
department.
DO NOT OPERATE APPLIANCE UNTIL THE LEAKAGE IS
CORRECTED!

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Installation (Locating The Water Heater) continued-
The water heater must be located close enough to the outside wall to keep the
venting distance within the maximum distance described in the installation
instructions. Read the venting section in this installation instruction manual
before locating the water heater.
This water heater must be located in an area where leakage of the tank or
water line connections and the combination temperature and pressure relief
valve will not result in damage to the area adjacent to the water heater or to
lower floors of the structure. When such locations cannot be avoided, a suitable
drain pan adequately piped for proper drainage must be installed under the
water heater. The drain pan, as described above, can be purchased from your
plumbing professional. The drain pan must be piped to an adequate drain.
The piping must be at least 3/4 inch (1.9 cm) in diameter and pitched for proper
drainage.
It is recommended that a minimum clearance of four (4) inches (10.2 cm) be
provided on the side of the water heater for servicing and maintenance of the
combination temperature and pressure relief valve.
This water heater MUST be installed indoors out of the wind and weather.
Note: For California installation this water heater must be braced,
anchored, or strapped to avoid falling or moving during an earthquake.
See instructions for correct installation procedures. Instructions may be
obtained from DSA Headquarters Office, 1102 Q Street, Suite 5100,
Sacramento, CA 95811.
WARNING
DO NOT ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE NOT
CERTAIN OF THE FOLLOWING:
Liquefied petroleum gases/propane gas and natural gas have an
odorant added by the gas supplier that aids in the detection of the
gas.
Most people recognize this odor as a “sulfur” or “rotten egg” smell.
Other conditions, such as “odorant fade” can cause the odorant to
diminish in intensity, or “fade”, and not be as readily detectable.
If you have a diminished sense of smell, or are in any way unsure of
the presence of gas, immediately contact your gas supplier from a
neighbor’s telephone.
Gas detectors are available. Contact your gas supplier, or plumbing
professional, for more information.

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Minimum Clearances
This installation must allow access to the front of the water heater and
adequate clearance must be provided for servicing and operating this water
heater. The water heater may be installed on either a combustible or non-
combustible floor. If the water heater is to be installed directly on carpeting, it
must be installed on top of a metal or wood panel extending beyond the full
width and depth of the appliance by at least three (3) inches (7.6 cm) in any
direction or, if the appliance is to be installed in an alcove or closet, the entire
floor must be covered by the panel. The minimum clearances to combustibles
for this water heater are: zero (0) inch (0 cm) from the sides and rear, five (5)
inches (12.7 cm) from the front of the jacket, zero (0) inch (0 cm) from the vent
connector and fifteen (15) inches (38.1 cm) from the jacket top.
Venting
Figure 1 – Direct Vent Terminal Clearances
WARNING
Failure to adhere to these installation and operating instructions may
create a hazard to life and property and will nullify the warranty.

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Venting continued-
Canadian
Installations1US
Installations2
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) 12 inches (30 cm)
C= Clearance to permanently closed window *b *b
D= Vertical clearance to ventilated soffit located above the terminal within a
horizontal distance of 2 feet (61 cm) from the center line of the terminal *b *b
E= Clearance to unventilated soffit *b *b
F= Clearance to outside corner *b *b
G= Clearance to inside corner *b *b
H= Clearance to each side of center line extended above meter/regulator
assembly
3 feet (91 cm)
within a height 15
feet (4.6 m) above
the
meter/regulator
assembly
*b
I= Clearance to service regulator vent outlet or oil tank vent 36 inches
(91 cm) *b
J= Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance 12 inches (30 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
horizontally
L= Clearance above paved sidewalk or paved driveway located on public
property 7 feet (2.13 m)† 7 feet (2.13 m)†
M= Clearance under a veranda, porch, deck, or balcony 12 inches
(30 cm) ‡ *b
1 In accordance with the current CAN/CGA-B149 Installation Codes.
2 In accordance with the current ANSI Z223.1-(Latest edition)/NFPA 54 National Fuel Gas Code.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single-
family dwellings and serves both dwellings.
‡ Permitted only if a veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the
floor.
*a) A minimum clearance value determined by testing in accordance with section 2.20.
*b) “Clearance in accordance with local installation codes and the requirements of the gas supplier”.
The vent system must terminate so that proper clearances are maintained as cited
in local codes or the latest edition of the National Fuel Gas Code, ANSI
Z223.1.73.4e and 7.8a, b as follows:
1. Do not terminate near soffit vents or crawl space or other area where condensate or
vapor could create a nuisance or hazard or cause property damage.
2. Do not terminate the exhaust vent terminal where condensate or vapor could cause
damage or could be detrimental to the operation of regulators, relief valves, or other
equipment.
3. Do not terminate the exhaust vent terminal over public area or walkways where
condensate or vapor can cause nuisance or hazard.
4. The vent shall terminate a minimum of 12” (25.4 cm) above expected snowfall level
to prevent blockage of vent termination.

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Venting continued-
Vent pipes serving power vented appliances are classified by building codes as
“vent connectors”. Required clearances from combustible materials must be
provided in accordance with information in this manual under LOCATION OF
WATER HEATER and CLEARANCES, and with National Fuel Gas Code and
local codes.
Venting System Condensation
Condensate formation does not occur in all installations of power direct vented
water heaters, but should be protected against on installations where
condensation can form in the venting system.
Formation of condensation in the venting system of Power Vented water
heaters is dependent upon installation conditions including, but not limited to:
ambient temperature and humidity of installation location;
ambient temperature and humidity of venting space;
vent distance and slope;
and product usage.
NOTICE
In locations where sustained outside air temperatures are below freezing, it is
possible for the vent terminations to accumulate ice build-up due to adverse local
climate conditions (prevailing wind direction, wind speed, termination orientation,
etc.). The optional concentric vent terminal is more resistant to this ice build-up.
In more severe temperature conditions, an optional manufacturer approved air
intake relief device is available and may be installed, per the instructions, to
prevent nuisance shut down of the water heater. The air intake relief device may
be installed with the concentric vent termination or the standard separate vent
terminations. Consult the concentric vent and/or the air intake relief device
instructions for installation requirements.
NOTICE
For installations in Canada, field supplied plastic vent piping must comply
with CAN/CGA B149.1 (latest edition) and be certified to the Standard For
Type BH Gas Venting Systems, ULC S636. Components of this listed
system shall not be interchanged with other vent systems or unlisted
pipe/fittings. All plastic components and specified primers and glues of the
certified vent system must be from a single system manufacturer and not
intermixed with other system manufacturer’s vent system parts.
The supplied vent connector and vent termination are certified as part of the
water heater.

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Venting continued-
In order to effectively control condensate from adversely affecting the
mechanical components of the water heater several methods may be
employed:
1. For horizontal installations the vent pipe can be installed with a
downward slope (not less than 1/8" (3 mm)) and away from the blower.
2. In order to prevent condensate from draining back into the blower
(vertical or horizontal runs), an optional condensate kit is available as a
service part (Condensate kit, p/n 239-45875-00). A factory supplied
exhaust adapter with drain outlet mounts directly to the blower outlet
and is secured with two hose clamps, one to the blower and the other
to the vent pipe. Plastic tubing is provided to drain any accumulated
condensate away from the water heater and to a suitable drain. The kit
comes complete with instructions for proper installation.
PART I - Venting Specifications for:
48 Gallon (181.6L)
65 Gallon (246.0L)
75 Gallon (283.9L)
NOTE: Properly sized PVC, CPVC, or ABS* pipe must be used.
This water heater is a power vented appliance and is designed to intake and
exhaust the products of combustion through 3” (7.6 cm) or 4” (10.2 cm)
diameter Schedule 40 (solid or cellular core) vent pipe to the outdoors. This
water heater may be either vented horizontally through the wall or vertically
through the roof. Use a 3” (7.6 cm) to 4” (10.2 cm) reducer to connect to the
intake and outlet when using 4” (10.2 cm) vent pipe. Apply the proper cement
at the joint locations. Table 1 lists the maximum vent lengths for this water
heater using 3” (7.6 cm) intake and exhaust pipe. If possible, locate the water
heater so that the venting length and number of elbows are kept to the
minimum distance necessary to reach the outside. If the installation requires
venting lengths that exceed the lengths listed for 3” (7.6 cm) vent pipe in Table
1, then use 4” (10.2 cm) vent pipe for the vent connector.
Table 2 lists the venting distances allowed with 4” (10.2 cm) diameter vent pipe.
When venting with 4” (10.2 cm) vent pipe, use a 4” (10.2 cm) to 3” (7.6 cm)
reducer to exit through the building wall with 3” (7.6 cm) vent pipe. Use the 3”
(7.6 cm) vent terminal supplied with the water heater to terminate on the
outside of the building. If the length of 3” (7.6 cm) vent pipe needed to go
through the wall is greater than 14” (35.5 cm), use 4” (10.2 cm) to go through
the wall and reduce to 3” (7.6 cm) vent pipe immediately after exiting the
outside wall. Refer to the venting illustrations on the following pages. Make
sure the vent pipe terminal elbow fitting is at least 1” (2.5 cm) away from the
edge of the wall.
* Only vent pipe certified to ULC S636 may be used in Canada.

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Venting continued-
TABLE 1 - VENT CONNECTOR LENGTHS
FOR 3” (7.6 cm) DIAMETER VENT PIPE
Terminating # of Elbows
(excl. vent
term.)
Maximum straight
Length ft (m) Minimum
straight
Length
ft (m)
48, 65
gal. 75 gal.
Through the Wall 1 55 (16.8) 45 (13.7) 2 (.6)
Through the Wall 2 50 (15.2) 40 (12.2) 2 (.6)
Through the Wall 3 45 (13.7) 35 (10.7) 2 (.6)
Through the Wall 4 40 (12.2) 30 (9.1) 2 (.6)
Through the Roof 0 60 (18.3) 50 (15.2) 7 (2.1)
Through the Roof 1 55 (16.8) 45 (13.7) 7 (2.1)
Through the Roof 2 50 (15.2) 40 (12.2) 7 (2.1)
Through the Roof 3 45 (13.7) 35 (10.7) 7 (2.1)
TABLE 2 -VENT CONNECTOR LENGTHS
FOR 4” (10.2 cm) DIAMETER VENT PIPE
Terminating # of 90
Elbows (excl.
vent term.)
Maximum straight
Length ft (m) Min straight
Length
ft (m)
48, 65 gal. 75 gal.
Through the Wall 1 95 (29.0) 85 (25.9) 10 (3.1)
Through the Wall 2 90 (27.4) 80 (24.4) 10 (3.1)
Through the Wall 3 85 (25.9) 75 (22.9) 10 (3.1)
Through the Wall 4 80 (24.4) 70 (21.3) 10 (3.1)
Through the Wall 5 75 (22.9) 65 (19.8) 10 (3.1)
Through the Roof 0 100 (30.5) 90 (27.4) 15 (4.6)
Through the Roof 1 95 (29.0) 85 (25.9) 15 (4.6)
Through the Roof 2 90 (27.4) 80 (24.4) 15 (4.6)
Through the Roof 3 85 (25.9) 75 (22.9) 15 (4.6)
Through the Roof 4 80 (24.4) 70 (21.3) 15 (4.6)
IMPORTANT
The minimum equivalent length for the exhaust portion of the vent is 7
feet. The maximum equivalent vent length for the exhaust is 60 feet for
3” diameter pipe (50 feet for the 75 gal.) and 100 feet for 4” diameter
pipe (90 feet for the 75 gal.). The intake portion of the vent must be
equal to or less than the vent length of the exhaust. The tables below
are provided for your quick reference, some installations may require a
greater number of elbows. When calculating equivalent vent length,
one 90º elbow is equivalent to 5 feet.

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Venting continued-
NOTE: When using 4” (10.2 cm) vent pipe, use two 4” (10.1 cm) to 3” (7.6
cm) reducers for each portion of the vent. One reducer is installed just
after the blower and the other reducer is used just prior to exiting the
building. Exit the building wall with 3” (7.6 cm) vent pipe using the 3”
(7.6 cm) 90vent terminal supplied. Two 45elbows are equivalent to one
90elbow.
Figure 2
IMPORTANT
All of the Venting connections must be leak checked with a soap and
water solution upon initial start up of the water heater. Any leaks must
be repaired before continuing operation of the water heater.

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Venting continued-
THROUGH THE WALL VENTING: (HORIZONTAL VENTING WITH
STANDARD VENT TERMINALS).
Cut two 3 1/2 in. (8.9 cm) diameter holes in the wall at the point where the vent
connector is going to pass through the wall. Use the proper cement to secure
the 90° vent terminal provided with the water heater to the vent connector. The
distance between the edge of the 90° vent terminal and the exterior wall (see
Figure 3) must be 1 in. (2.5 cm). The exhaust and intake must not be less than
16” (40.6 cm) apart (see figure 4a). Use the proper cement and assembly
procedures to secure the vent connector joints between the terminal and the
blower outlet. Provide support brackets for every 5 feet (1.5m) of horizontal
vent.
3” VENT INSTALLATION
4” VENT INSTALLATION
Figure 3

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Venting continued-
Vent terminal configuration for mild climates
Figure 4a
When venting through the wall, the exhaust terminal must exit the structure at a
minimum of 16" (40.6 cm) from either side, or any location above the intake terminal.
The exhaust terminal must not be located below the intake terminal for any reason.
Two 90° end terminal elbows are supplied. These must be installed at the extreme ends
of the intake and exhaust venting outside the building. The end terminal with the
external (domed) screen must be installed on the intake vent as shown above.
Vent terminal configuration for cold climates
Figure 4b
The exhaust should be installed above the air intake on the diagonal, 18” horizontal and
18” vertical from the air intake (see figure 4b), and should extend from the finished wall
by a minimum of 10”.
The air intake screen can be removed for cold installations but this may make the air
intake susceptible to debris buildup from birds or other animals. If the air intake
screen is removed to prevent freezing, it is recommended that the air inlet screen be
installed during the spring.
CAUTION - NEVER INSTALL AIR INTAKE ABOVE EXHAUST

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Venting continued-
THROUGH THE WALL VENTING: (HORIZONTAL VENTING WITH
CONCENTRIC VENT).
Cut one 4 5/8 in. (11.7 cm) diameter hole in the wall at the point where the vent
connector is going to pass through the wall. Use the proper cement to secure
the vent terminal to the vent connector. Use the proper cement and assembly
procedures to secure the vent connector joints between the terminal and the
blower outlet. Provide support brackets for every 5 feet (1.5 m) of horizontal
vent.
Figure 5
THROUGH THE ROOF VENTING: (VERTICAL VENTING STANDARD
TERMINALS).
Cut the necessary holes through the roof and ceiling and install the vent
connector as shown in Figure 6. Make sure that the installation meets the local
codes and/or The National Fuel Gas Code ANSI Z223.1 (Latest Edition) or
CGA/CAN B149 Installation Code (latest edition).
IMPORTANT
When using the concentric vent terminal the maximum vent length is
reduced by 10 feet.

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Venting continued-
3” VENT INSTALLATION
4” VENT INSTALLATION
Figure 6
NOTE: For installations requiring both horizontal and vertical runs, the
following rule must be followed: Total length of straight pipe (both
horizontally and vertically) must not exceed the maximum equivalent
length listed in these instructions.

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Venting continued-
THROUGH THE ROOF VENTING: (VERTICAL VENTING CONCENTRIC
VENT TERMINAL):
Cut the necessary holes through the roof and ceiling and install the vent
connector as shown in Figure 7. Make sure that the installation meets the local
codes and/or the National Fuel Gas Code ANSI Z223.1 (Latest Edition) or
CAN/CGA B149 installation code (latest edition). A condensate kit must be
installed when venting through the roof.
Figure 7
NOTE: For installations requiring both horizontal and vertical runs,
the following rule must be followed. Total length of straight pipe
(both horizontally and vertically) must not exceed the equivalent
length listed in these instructions. For the concentric vent terminal
the maximum vent length is reduced by 10 feet.
CAUTION
FOR VERTICAL INSTALLATIONS WITH CONCENTRIC VENT TERMINAL,
CONDENSATE KIT, P/N 239-45875-00, MUST BE USED.

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Venting continued-
THROUGH THE WALL VENTING WITH LOW GROUND CLEARANCE:
When venting cannot exit through the wall at a height greater than or equal to
12” (30.5 cm) above the ground, or anticipated snow level, the installation must
be modified as shown below (see Figure 8). Refer to Table 3 for maximum
venting lengths using 3” (7.6 cm) vent pipe or Table 4 for maximum lengths
using 4” (10.2 cm) vent pipe. The exhaust and intake terminals must not be
less than 16 in. (40.6 cm) apart (see figure 4a).
3” VENT
INSTALLATION
4” VENT
INSTALLATION
Figure 8

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Venting continued-
TABLE 3
3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating # of Elbows
(excl. vent term.)
Max Straight
Length ft (m) Min
straight
Length
ft (m)
48,65
gal. 75 gal.
(2) 90Elbows with (1)
90Elbow 1 40
(12.2) 30 (9.1) 5 (1.5)
(2) 90Elbows with (1)
90Elbow 2 35
(10.7) 25 (7.6) 5 (1.5)
(2) 90Elbows with (1)
90Elbow 3 30 (9.1) 20 (6.1) 5 (1.5)
(2) 90Elbows with (1)
90Elbow 4 25 (7.6) 15 (4.6) 5 (1.5)
TABLE 4
4” (10.2 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating (Reduce 4”
to 3”) (Reduce 10.1 cm
to 7.6 cm)
# of Elbows
(excl. vent
term.)
Max straight
Length ft (m) Min straight
Length
ft (m)
48,65
gal. 75 gal.
(2) 90Elbows with (1) 90
Elbow 1 85
(25.9) 75 (22.9) 10 (3.1)
(2) 90Elbows with (1) 90
Elbow 2 80
(24.4) 70 (21.3) 10 (3.1)
(2) 90Elbows with (1) 90
Elbow 3 75
(22.9) 65 (19.8) 10 (3.1)
(2) 90Elbows with (1) 90
Elbow 4 70
(21.3) 60 (18.3) 10 (3.1)
(2) 90Elbows with (1) 90
Elbow 5 65
(19.8) 55 (16.8) 10 (3.1)
HIGH ALTITUDE INSTALLATIONS FOR ELEVATIONS OVER 2,500
FEET (762 m) ABOVE SEA LEVEL
The capacity of the induced draft blower declines with increasing altitude due to
a reduction in the air density. In order to assure safe and reliable performance
of the water heater, contact the supplier for high altitude kit.