Poloma PH-28 R DVSN, PH-28 C DVSN, PH-28 R DVSP, PH-28 C DVSP Installation And Operating Instruction Manual
FOR YOUR SAFETY!
— Do not store or use gasoline or other
flammable vapors or liquids or other
combustible materials in the vicinity of this or
any other appliance. To do so may result in an
explosion or fire.
— WHAT TO DO IF YOU SMELL GAS
l Do not try to light any appliance.
l Do not touch any electrical switch; do not
use any phone in your building.
l Immediately call your gas supplier from a
neighbor’s phone. Follow the gas
supplier’s instructions.
l If you cannot reach your gas supplier, call
the fire department.
l Do not return to your home until authorized
by the gas supplier or fire department.
— Improper installation, adjustment,
alteration, service or maintenance can cause
property damage, personal injury, or death.
Refer to this manual. Installation and service
must be performed by a qualified installer,
service agency or the gas supplier.
WARNING: If the information in these instructions is not followed exactly,
a fire or explosion may result causing property damage, personal injury or death.
The purpose of this manual is twofold: one, to provide the installer with
the basic directions and recommendations for the proper installation and
adjustment of the water heater; and two, to the owner–operator, to
explain the features, operation, safety precautions, maintenance and
troubleshooting of the water heater. This manual also includes a parts
list.
It is very important that all persons who are expected to install, operate
or adjust this water heater read the instructions carefully so they may
understand how to perform these operations. If you don’t understand
these instructions or any terms within it, seek professional advice.
Any questions regarding the operation, maintenance, service or
warranty of this water heater should be directed to the seller from whom
it was purchased, local distributor or Paloma.
Do not destroy this manual. Please read carefully and keep in a safe
place for future reference.
Recognize this symbol as an indication of Important Safety
Information!
California Proposition 65 Warning: This product contains
chemicals known to the State of California to cause cancer, birth
defects or other reproductive harm.
Installation and Operating Instruction Manual
With Installation Instructions for the Installer
Tankless Water Heater
Warning: This water heater is not suitable
for use in manufactured (mobile) homes!
Direct Vent Gas
(Residential and Commercial)
Models: PH-28 R DVSN (Natural Gas)(Residential)
PH-28 R DVSP (L.P. Gas)(Residential)
PH-28 C DVSN (Natural Gas)(Commercial)
PH-28 C DVSP (L.P. Gas)(Commercial)
R
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Direct Vent Water Heater
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CERTIFIED
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Safety Information
Safety Precautions . . . . . . . 3–6
LP Gas Models . . . . . . . . . . . 5
Installation Instructions
Location of Water Heater . 7, 8
Venting . . . . . . . . . . . . . . . 9-15
Water Connections . . . . . 16-18
Gas Supply . . . . . . . . . . . . . . 19
High Altitude . . . . . . . . . . . . 19
Remote Control . . . . . . . 20, 21
Electrical Connection . . . . . . 22
Typical Installation . . . . . . . . 23
Pipe Insulation . . . . . . . . . . . 24
Installation Checklist . . . 24, 25
Operating Instructions
Lighting Instructions . . . . . . 26
Water Temperature. . . . . 27, 28
Care and Cleaning
Maintenance. . . . . . . . . . . . . 29
Housekeeping . . . . . . . . 29, 30
Vent Inspection . . . . . . . . . . . 30
Burner Inspection . . . . . . . . 30
Extended Shut-Down . . . . . . 30
Draining . . . . . . . . . . . . . . . . 31
Freeze Protection . . . . . . . . . 31
Troubleshooting Tips
Before You Call
For Service . . . . . . . . . . 32, 33
Customer Service
Parts List . . . . . . . . . . . . . . . 34
If You Need Service . . . . . . . 36
Inside you will find many helpful hints on how to use and
maintain your water heater properly. A little preventive care on
your part can save you time and money over the life of your
water heater.
You’ll find many answers to common problems in the
Troubleshooting Guide. If you review the chart of
Troubleshooting Tips first, you may not need to call for service.
READ THIS MANUAL
FOR YOUR RECORDS
Write the model and serial numbers here:
#
#
You can find them on a label on the appliance.
Staple sales slip or cancelled check here.
Proof of the original purchase date is needed to obtain service
under the warranty.
You can also register your product at the time of installation
through our website at http://www.palomatankless.com.
2
Your safety and the safety of others are very important. There
are many important safety messages in this manual and on
your appliance. Always read and obey all safety messages.
This is the safety alert symbol. Recognize this symbol
as an indication of Important Safety Information!
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”, “WARNING”, “CAUTION” or
“NOTICE”.
These words mean:
DANGER
An imminently hazardous situation
that will result in death or serious
injury.
WARNING
A potentially hazardous situation that
could result in death or serious injury
and/or damage to property.
CAUTION
A potentially hazardous situation that
may result in minor or moderate
injury.
Notice:
Attention is called to observe a
specified procedure or maintain
a specific condition.
READ THE SAFETY INFORMATION
Qualified Installers Only!
Dip Switch Adjustment. . . . 35
Warranty . . . . . . . . . . . . . 37, 38
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Be sure to read and understand the entire Instruction Manual before attempting to install or operate
this water heater. It may save you time and money. Pay particular attention to the Safety Instructions.
Failure to follow these warnings could result in serious bodily injury or death. Should you have
problems understanding the instructions in this manual, or have any questions, STOP, and get help
from a qualified service technician, or the local gas utility.
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING.
3
Failure to install and properly vent the water heater to the outdoors as outlined in the
Venting Section of the Installation Instructions in this manual can result in unsafe
operation of the water heater. To avoid the risk of fire, explosion, or asphyxiation from
carbon monoxide, never operate this water heater unless it is properly vented and has an
adequate air supply for proper operation.
Be sure to inspect the vent terminal, vent, and the air intake system on the water heater
for proper installation at initial start-up; and at least annually thereafter. Proper
operation of the water heater requires air for combustion. Provisions for combustion air
must comply with referenced codes and standards. Refer to the Care and Cleaning section
of this manual for more information regarding vent and air intake system inspection.
DANGER!
INSTALL AND PROPERLY VENT THE WATER HEATER…
Gasoline, as well as other flammable materials and liquids (adhesives, solvents, paint
thinners etc.), and the vapors they produce are extremely dangerous. DO NOT handle,
use or store gasoline or other flammable or combustible materials anywhere near or in the
vicinity of a water heater or any other appliance. Be sure to read and follow the labels on
the water heater, as well as the warnings printed in this manual. Failure to do so can
result in property damage, bodily injury or death.
WARNING!
DANGER
FLAMMABLES
Vapors from flammable
liquids will explode and
catch fire causing death or
severe burns.
Do not use or store flammable
products such as gasoline,
solvents or adhesives in the
same room or area near the
water heater.
Keep flammable products:
1. far away from heater,
2. in approved containers,
3. tightly closed and
4. out of children's reach.
Installation:
Do not install water heater
where flammable products will
be stored or used unless the
main burner flame is at least
Read and follow water heater warnings and instructions. If
owners manual is missing, contact the retailer or manufacturer.
Flammable Vapors
Water he ater has a ma in
burner flame.
The main burner flame:
1. which c an come on
at any time and
2. will ignite flammable
vapo rs.
Vapo rs:
1. cannot be seen,
2. are heavier than air,
3. go a long way on the
floo r and
4. can be carried from
other r ooms to the
main burner flame by
air currents.
18" above the floor. This will
reduce, but not eliminate, the
risk of vapors being ignited
by the main burner flame.
Time/Temperature Relationship in Scalds
Water Temperature Time To Produce a Serious Burn
120°F (49°C) More than 5 minutes
125°F (52°C) 11/2 to 2 minutes
130°F (54°C) About 30 seconds
135°F (57°C) About 10 seconds
140°F (60°C) Less than 5 seconds
145°F (63°C) Less than 3 seconds
150°F (66°C) About 11/2
seconds
155°F (68°C) About 1 second
Table courtesy of Shriners Burn Institute
The chart shown above may be used as a guide
in determining the proper water temperature for
your home.
DANGER: Households with small children,
disabled, or elderly persons may require a
120°F (49°C) or lower temperature setting to
prevent contact with “HOT” water.
Maximum water temperature occurs while burner is
on. To find water temperature being delivered, turn
on a hot water faucet and place a thermometer in the
water stream and read the thermometer.
(See page 27 & 28 for more details.)
The temperature of the water at the outlet of the
water heater can be regulated by setting the
temperature on Remote Control. The remote control
was set at 100°F (38°C) before it was shipped from
the factory.
The Figure to the bottom left illustrates the Remote
Control and how to adjust the water temperature.
Notice: The factory setting allows operating
temperatures between 100°F (38°C) and 120°F
(49°C). Temperatures of up to 140°F (60°C) for
Residential models and up to 180°F (82°C) for
Commercial models can be achieved with the
MAIN (UMC-117) remote control and a dip switch
adjustment. Only qualified service personnel should
perform this adjustment. Only factory authorized
remote control(s) should be used.
Notice: When this water heater is supplying general
purpose hot water requirements for use by
individuals, a thermostatically controlled mixing
valve for reducing point of use water temperature is
recommended to reduce the risk of scald injury.
Contact a licensed plumber or the local plumbing
authority for further information.
DANGER!
WATER TEMPERATURE SETTING
Safety and energy conservation are factors to be considered when selecting the water
temperature setting of a water heater’s remote control. Water temperatures above
125°F (52°C) can cause severe burns or death from scalding. Be sure to read and follow the
warnings outlined on the label pictured below.
4
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING.
Notice: Only commercial model water heaters can
achieve temperatures up to 180°F (82°C).
* Temperatures above 120°F (49°C) can be achieved
by adjusting the dip switch. See page 35 for dip
switch adjustment.
Notice:
Display
shows
°F only.
!
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DANGER
HOT
BURN
Water temperature over 125° F can
cause severe burns instantly or
death from scalds.
Children, disabled and elderly are
at highest risk of being scalded.
See instruction manual before
setting temperature at water
heater.
Feel water before bathing or
showering.
Temperature limiting valves are
available, see manual.
Higher (Hotter) Lower (Cooler)
100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 150 160 170 180 °F
38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 66 71 77 82 °C
PRIORITY
°F
POWER
ON/OFF
!
5
Both LP and natural gas have an odorant added to aid in detecting a gas leak. Some
people may not physically be able to smell or recognize this odorant. If you are unsure or
unfamiliar with the smell of LP or natural gas, ask the gas supplier. Other conditions, such
as “odorant fade”, which causes the odorant to diminish in intensity, can also hide or
camouflage a gas leak.
DANGER!
NATURAL GAS AND LIQUEFIED PETROLEUM MODELS
l Water heaters utilizing LP gas are
different from natural gas models. A
natural gas water heater will not function
safely on LP gas and vice versa.
l No attempt should ever be made to
convert the water heater from natural
gas to LP gas. To avoid possible
equipment damage, personal injury or
fire, do not connect the water heater to a
fuel type not in accordance with the unit
data plate; propane for propane units
and natural gas for natural gas units.
These units are not certified for any
other fuel type.
l LP appliances should not be installed
below grade (for example, in a basement)
if such installation is prohibited by
federal, state and/or local laws, rules,
regulations or customs.
l Propane or LP gas must be used with
great caution. It is heavier than air and
will collect first in lower areas making it
hard to detect at nose level.
l Before attempting to light the water
heater, make sure to look and smell for
gas leaks. Use a soapy solution to check
all gas fittings and connections. Bubbling
at a connection indicates a leak that must
be corrected. When smelling to detect a
gas leak, be sure to sniff near the floor
also.
l Gas detectors are recommended in LP
and natural gas applications and their
installation should be in accordance with
the detector manufacturer’s
recommendations and/or local laws,
rules, regulations or customs.
l It is recommended that more than one
method, such as soapy solution, gas
detectors, etc., be used to detect leaks in
gas applications.
Notice: If a gas leak is present or suspected:
l Do not attempt to find the cause yourself.
l Do not
try to light any appliance.
l Do not
touch any electrical switch.
l Do not
use any phone in your building.
l Leave the building immediately and
make sure your family and pets leave
also.
l Leave the doors open for ventilation and
contact the gas supplier, a qualified
service agency or the fire department.
l Stay away from the building until the
service call has been made, the leak is
corrected and a qualified agency has
determined the area to be safe.
6
Have the installer show you the location of the gas shut-off valve and how to shut it off if
necessary. Turn off the manual shut-off valve if the water heater has been subjected to
overheating, fire, flood, physical damage or if the gas supply fails to shut off.
l Read this manual entirely before
installing or operating the water heater.
l Use this appliance only for its intended
purpose as described in this Instruction
Manual.
l Be sure your appliance is properly
installed in accordance with local codes
and the provided installation
instructions.
l Do not attempt to repair or replace any
part of your water heater unless it is
specifically recommended in this
manual. All other servicing should be
referred to a qualified technician.
SAFETY PRECAUTIONS
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING.
WARNING!
For your safety, the information in this manual must be followed to minimize the risk of
fire or explosion, electric shock, or to prevent property damage, personal injury, or loss of
life.
FOR INSTALLATIONS IN THE STATE OF CALIFORNIA
California Law requires that water heaters must be braced, anchored or strapped to
resist falling or horizontal displacement due to earthquake motions. For water heaters up
to 52 gallon capacity, a brochure with generic earthquake bracing instructions can be
obtained from: Office of the State Architect, 1102 Q Street, Suite 5100, Sacramento, CA
95814 or you may call 916-445-8100 or ask a water heater dealer.
However, applicable local codes shall govern installation. For water heaters
of a capacity greater than 52 gallons or tankless-style, consult the local building
jurisdiction code for acceptable bracing procedures.
READ AND FOLLOW THIS SAFETY INFORMATION
CAREFULLY.
SAVE THESE INSTRUCTIONS
NOTICE: This water heater requires a special venting system. Refer to the instructions
in the vent section for proper vent material and method of installation.
!
Installing the water heater :
This water heater must be installed in accordance with these instructions, local codes, utility company
requirements, and/or in the absence of local codes, use the latest edition of the American National
Standard/National Fuel Gas Code. A copy can be purchased from either the American Gas Association,
400 North Capitol Street Northwest, Washington, DC 20001 as ANSI standard Z223.1 or National Fire
Protection Association, 1 Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest
edition of the CSA B149.1 Natural Gas and Propane Installation, and the Canadian Electrical Code,
CSA C22.1 Part 1, in the absence of local codes.
Location of Water Heater
The water heater should not be located
in an area where leakage of the heat
exchanger or connections will result in
damage to the area adjacent to it or to
lower floors of the structure.
When such areas cannot be avoided it is
recommended that a suitable catch pan,
adequately drained, must be installed
under the water heater.
The pan must not restrict combustion air
flow.
A gas fired water heater or any other
appliance should not be installed
in a space where liquids which give off
flammable vapors are to be used or stored.
Such liquids include gasoline, LP gas
(butane or propane), paint or adhesives and
their thinners, solvents or removers.
Because of natural air movement in a room
or other enclosed space, flammable vapors
can be carried some distance from where
their liquids are being used or stored. The
open flame of the water heater’s main
burner can ignite these vapors causing an
explosion or fire which may result in severe
burns, death or property damage.
The water heater must be located so it is not
subject to physical damage, for example, by
moving vehicles, area flooding, etc.
If the water heater is installed in a garage, it
should be installed so that the direct
ignition system and main burner are no less
than 18 inches (45 cm) above the garage
floor.
Raising the gas fired water heater will
reduce BUT NOT eliminate the possibility
of lighting the vapor of any flammable
liquids which may be improperly stored or
accidentally spilled.
l The water heater should be installed as
close as practical to the vent termination
to minimize vent length and the number
of elbows required for venting.
l The water heater should be installed with
the proper venting materials and
termination suitable for Category III
venting.
l A fire stop plate should be installed at
every penetration of a floor or ceiling if
the vent is not running in a fire-rated
shaft.
l Failure to install and properly vent the
water heater to the outdoors as outlined
in the Venting Section of this manual can
result in unsafe operation.
l Long hot water lines should be insulated to
conserve water and energy.
l The water heater and water lines should
be protected from exposure to freezing
temperatures.
l Do not install the water heater in
bathrooms, bedrooms, any occupied
rooms normally kept closed, or in
outdoor areas.
l Do not install the water heater in small,
poorly ventilated rooms, or in air tight
rooms with air-conditioning.
l Do not install water heater where subject
to vibrations.
l Do not install the water heater in
Recreational Vehicles, Mobile Homes,
Boats and other Watercrafts.
l Do not install the water heater near vents
for heating or cooling. A minimum of 4
feet (1.2 m) should be maintained.
l Minimum clearance from combustible
and non-combustible construction is 0”
around the air intakes pipe, 1/2” (1.3 cm)
sides, 0” rear (with support bracket); 12”
(30 cm) from the bottom; 12” (30 cm)
from the front of the water heater; and
12” (30 cm) from the top, (24” (61 cm)
from front and top is recommended for
servicing purposes). Refer to Figure on
page 8.
l Maintain a minimum clearance of
1” (2.5 cm) between the vent outlet pipe
and air intake pipe. Also, maintain a 3”
(8 cm) clearance between the vent pipe
and combustible or non-combustible
construction, unless otherwise specified
by vent manufacturer or installed in an
enclosed space. If the clearances stated
on the Instruction/Warning Label,
located on the front panel of the heater
differ, install the water heater according
to the clearances stated on the label.
Refer to Figure on page 8.
7
WARNING: Combustible
construction refers to
adjacent walls and ceilings
and should not be confused
with combustible or
flammable products and
materials. Combustible
and/or flammable products
and materials should never
be stored in the vicinity of
this or any gas appliance.
!
Installing the water heater:
Corrosive Atmospheres
The air in beauty shops, dry cleaning
establishments, photo processing labs,
and storage areas for liquid and powdered
bleaches or swimming pool chemicals
often contain such halogenated
hydrocarbons.
An air supply containing halogenated
hydrocarbons may be safe to breathe,
but when it passes through a gas flame
corrosive elements are released that
will shorten the life of any gas burning
appliance.
Propellants from common spray cans or
gas leaks from A/C and refrigeration
equipment are highly corrosive after
passing through a flame.
The water heater warranty is voided when
failure of the heater is due to operation in
a corrosive atmosphere.
NOTICE: The water heater
should not be installed near
an air supply containing
halogenated hydrocarbons.
Inspect Shipment
Inspect the water heater for possible damage. Check the markings on the rating plate of
the water heater to be certain the type of gas supplied corresponds to the water heater
requirements. Verify all included parts are present (see below).
8
Minimum Clearance from
Combustible and Non-
Combustible Construction.
WARNING: Follow
vent manufacturers
instruction while
installing vent. If
required, provide
additional clearances
from vent to
combustibles per vent
manufacturers
instruction.
Location of Water Heater continued:
1” (2.5cm) min.
between vent outlet
and air intake pipe.
Notice: Maintain a
3” (8 cm) clearance
between the vent pipe
and combustible or
non-combustible
construction.
1/4” Per foot downward
slope towards termination
Max. 3’
(91 cm)
Air
Intake Pipe
Vent
Outlet Pipe
Vent
Outlet
Air
Intake
Air intake/Vent pipe
termination - should
be sloped downward
Top = 12"(30 cm) Back = 0" *
Vent = 3" (8 cm) Side = 1/2" (1.3 cm)
Front = 12"(30 cm) Bottom = 12" (30 cm)
Air Intake = 0”
* (with support bracket)
!
min.
1/2 "
(1.3 cm)
min. 3"
(8 cm)
(30 cm)
min. 12"
(24" (60 cm) minimum is
recommended for service)
min.
1/2 "
(1.3 cm)
Use & Care Manual
With Installation Instructions for the Installer
Residential Gas
Tankless
Water Heaters
Warning: This waterheateris not suitable for
use in manufactured (mobile) homes!
The purpose of this manual is twofold: one, to provide the installerwith
the basic directions and recommendations forthe properinstallation and
adjustment of the waterheater; and two, to the owner–operator, to
explain the features, operation, safety precautions, maintenance and
troubleshooting of the waterheater. This manual also includes a parts
list.
It is imperative that all persons who are expected to install, operate or
adjust this waterheaterread the instructions carefully so they may
understand how to perform these operations. If you don’t understand
these instructions orany terms within it, seek professional advice.
Any questions regarding the operation, maintenance, service or
warranty of this waterheatershould be directed to the sellerfrom whom
it was purchased. If additional information is required, referto the
section on How to Obtain Service Assistance.
Do not destroy this manual. Please read carefully and keep in a safe
place forfuture reference.
Recognize this symbol as an indication of Important Safety
!
Information!
California Proposition 65 Warning:This product contains
!
chemicals known to the State of California to cause cancer, birth
defects orotherreproductive harm.
WARNING: If the information in these instructions is not followed exactly,
!
a fire orexplosion may result causing property damage, personal injury ordeath.
!
FOR YOUR SAFETY!
● If you cannot reach yourgas supplier, call
—Do not store or use gasoline or other
the fire department.
flammable vapors or liquids or other
combustible materials in the vicinity of this or
● Do not return to yourhome until authorized
any otherappliance. To do so may result in an
by the gas supplierorfire department.
explosion orfire.
— Improperinstallation, adjustment,
alteration, service ormaintenance can cause
—WHATTO DO IFYOU SMELL GAS
property damage, personal injury, ordeath .
●Do not try to light any appliance.
Referto this manual. Installation and service
● Do not touch any electrical switch; do not
must be performed by a qualified installer,
use any phone in yourbuilding.
service agency orthe gas supplier.
● Immediately call yourgas supplierfrom a
neighbor’s phone. Follow the gas
supplier’s instructions.
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Tankless Unit
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Instruction Manual
Manual Appliance
Gas Shut-off Valve
Drain Tubing
PRIORITY
°F
POWER
ON/OFF
Remote Control
Assembly Kit
Wood Screw x 5pcs.
Washer x 4 pcs.
Venting
The installation of venting must comply with
national codes, local codes, and the vent
manufacturer’s instructions.
The water heater must be vented to the
outdoors as described in these instructions.
DO NOT connect this water heater to a
Chimney. It must be vented separately from
all other appliances.
All vent components (adapters, pipe, elbows,
terminals, etc.) should be UL1738 Certified
Stainless Steel Venting Material
(e.g. AL29-4C).
Use a vent pipe with an anti-disconnection
joints.
The use of a High Temperature Silicone
(500°F) (260°C) may be required to seal
vent connections. To prevent accidental gas
exhaust leakage, apply a 1/4” (6 mm) wide
bead approximately 1/4” (6 mm) from the
end and another bead against the joint side
of the stop bead.
Follow vent manufacturer’s installation
instructions and their recommended
clearances to combustibles.
The unit can be vented either horizontally or
vertically.
Vent pipe runs must be adequately supported
along both horizontal and vertical runs.
The maximum recommended unsupported
span should be no more than five (5) feet
(1.5 m) Support isolation hanging bands
should be used. DO NOT use wire. (See
Figure below).
Notes on pr
e-existing vent:
If the water heater is being installed as a
replacement for an existing water heater, a
thorough inspection of the existing venting and
air intake system must be performed prior to
any installation work. Verify that the correct
materials, vent lengths and terminal locations as
detailed in this instruction manual have been
met. Carefully inspect the entire venting and air
intake system for any signs of cracks or
fractures, particularly at the joints between
elbows or other fittings and the straight runs of
vent pipe. Check the system for signs of
sagging or other stresses in the joints as a result
of misalignment of any components in the
system. If any of these conditions are found,
they must be corrected in accordance with the
venting instructions in this manual before
completing the installation and putting the
water heater into service.
DANGER: Failure to
install the appliance vent
adapter and properly vent
the water heater to the
outdoors as outlined in the
Venting section of this
manual will result in unsafe
operation of the water
heater causing death,
serious injury, explosion, or
fire. To avoid the risk of
fire, explosion, or
asphyxiation from carbon
monoxide, NEVER operate
the water heater unless it is
properly vented and has
adequate air supply for
proper operation as
outlined in the Venting
section of this manual.
Notice: Use a 4” Diameter
UL approved Category III
Stainless Steel vent material
only. No other vent
material is permitted.
WARNING: Refer to
page 7 & 8 for clearances
to combustible material.
Venting Lengths
MAXIMUM VENT LENGTH - The
system will not operate if there is excessive
restriction (pressure drop) in the venting
system. A maximum of 47 feet 6 inches
(14.4 m)
of vent pipe may be used provided
there is only one 90° elbow in the system. If
additional elbows are required: two elbows
can be used with 42 feet 6 inches
(13 m)
,
and three elbows can be used with 37 feet 6
inches
(11.4 m)
of vent pipe.
A 90° elbow is equivalent to 5 feet
(1.5 m)
to straight pipe. A 45° elbow is equivalent to
2 feet 6 inches
(76 cm)
of straight pipe.
The vent should be installed with a slight
downward slope of 1/4” per foot of
horizontal run toward the vent terminal (see
Figure on page 8). This ensures that any
condensate formed during operation of the
unit is evacuated from the appliance.
MINIMUM VENT LENGTH - The vent
length may be as short as one 90° elbow, one
vent adapter, and a Paloma approved vent
termination kit that is installed to the
outdoors through a sidewall.
Number of
90° elbows
(bends)
Maximum
Length of
Straight Pipe
1
2
3
47’ 6”
(14.4 m)
42’ 6”
(13 m)
37’ 6”
(11.4 m)
9
1’
6”
The water heater must be installed with a 4” Diameter UL approved Category III Stainless Steel vent pipe,
appliance vent adapter and Paloma approved vent termination.
NO! YES!
Venting Through Closed Spaces
If the vent piping passes through a closed space, a minimum
clearance of 8” (20 cm) when installed horizontally, 6”
(15 cm)
when installed vertically should be maintained between the vent
pipe and combustibles and noncombustibles. Be sure to follow
local codes and vent manufacturers installation instructions.
For maintenance and inspection purposes, the following access
panels are required.
l Two (2) inspection access panels large enough to allow
access for venting inspection. One (1) of these access
panels should be close to where the vent pipe enters the
ceiling. The other access panel should be near the vent
termination.
l A ventilation access panel with a 16 in2(103 cm2) opening
should be provided every 10 ft (3 m).
Appliance Vent Adapter
A UL 1738 approved stainless steel
appliance vent adapter is required for vent
connection.
Read the following instructions before
installation.
l Test fit the adapter over the water
heater collar before proceeding. Adjust
clamp as needed.
l With an alcohol wipe, clean inside
surface "A" of adapter and outside
surface of "B" of heater collar.
l Apply 1/4" (6 mm) wide bead of high
temperature silicone (500°F) (260°C)
around outside
of heater collar "B".
l Slide adapter end "A" down over heater
collar "B" as far as it will go.
l Tighten the clamp around the collar.
l Inspect the inside of the adapter to
verify that the collar and adapter are
sealed. If more sealant is required,
apply sealant to a flat tool, then spread
around the collar edge on inside
of
adapter.
NOTICE: Follow the appliance vent
adapter manufacturer’s instructions
Draining the Condensate
Horizontal Venting
Provision should be made to collect and
dispose of condensate from venting
systems.
When a water heater is vented horizontally
the vent pipe should have a downward
slope towards the vent termination. The
vent should have a 1/4” per foot
DOWNWARD slope towards the vent
terminal as shown above.
If the air intake pipe or duct is connected
to the bottom of the air intake tee, a
condensate trap must be installed as close
as practical to the air intake tee to drain
any water which may enter the air intake
termination away from the heater. See the
Figure on the right.
Vertical Venting
In order to prevent condensate from
draining back into the water heater
installed in a vertical installation, a
condensate trap and drain must be
installed in a horizontal vent section (See
Figure on page 15), as close as practical to
the water heater. An UPWARD SLOPE
should always be used. always attach a
drain hose to the drain fitting and plumb
the hose to a sanitary sewer drain.
A high temperature silicon tubing suitable
for use with acidic condensate and
appropriate for the temperature range
should be used.
The drain tube is fashioned into a “pigtail”
trap and must be filled with water to
prevent flue gases from emitting into the
building prior to operating the appliance.
CAUTION: Condensate
must drain away from the
water heater and should
not be allowed to drain
back into any part of the
vent system.
10
Installing the water heater:
The water heater must be installed with an UL approved Category III Stainless Steel appliance vent adapter
and Paloma approved vent termination.
Air Intake
1/4” Per foot downward
slope towards termination
Inspection
Access
Panel #1
Vent Outlet Pipe
Inspection
Access
Panel #2
Ceiling
Board
WARNING: Failure to
provide a vent condensate
drain close to the appliance
could allow acidic flue gas
condensate to enter into
appliance flueways causing
premature failure of the
appliance.
CAUTION:Condensate
is known to be acidic; refer
to local, state (provincial)
or federal codes for proper
handling and discharge
methods.
CAUTION: Ensure
appliance vent adapter is
securely attached to the
water heater collar.
Fire Stop
Clamp
Collar
Exhaust
Flow
Air
Intake
Appliance
Vent
Adapter
High
Temp
Sealant
High Temp.
Sealant
Water Heater
Exhaust
Flow
A
B
Air
Intake
A
B
Appliance
Vent Adapter
Clamp
Collar
11
G
The following information should be used for determining the proper location of the vent terminal
for direct vent tankless water heaters.
V
VENT
X
AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT
Horizontal Vent Terminal Location
Canadian Installations
1
US Installations
2
1 In accordance with current CAN/CGA-B149 Inst allation Codes.
2 In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code.
+ A vent shall not terminate directly above a sidewalk or p aved driveway that is located between two
single family dwellings and serves both dwellings.
* If clearances are not specified then follow local inst allation codes and the requirement of the gas
supplier .
** For condensing appliances: The vent for this appliance shall not terminate over public walkways, near
sof fit vent s, crawl sp ace vent s, of other areas where condensate or vapor could create a nuisance,
hazard, or cause property damage. Where condensate or vapor could cause damage or could be
detriment al to the operation of regulators, relief valves, or other equipment.
H = Clearance to each side of center line
extended meter/regulator assembly.
above
3 feet (91 cm) within a height 15 feet
(4.57 m) above the meter/regulator
assembly.
*
I = Clearance to service regulator vent
outlet.
3 feet (91 cm)
*
J = Clearance to nonmechanical air
supply inlet to the combustion air
inlet to any building or other
appliance.
6 inches (15 cm) for appliances < 10,000
Btuh (3 kW), 12 inches (30 cm) for
appliances > 10,000 Btuh (3kW) and
<
100,000 Btuh (30kW), 36 inches (91
cm) for appliances > 100,000 Btuh
(30kW).
6 inches (15 cm) for appliances <
10,000
Btuh (3 kW), 9 inches (23 cm) for
appliances > 10,000 Btuh (3 kW) and
< 50,000 Btuh (15 kW), 12 inches
(30 cm) for appliances > 50,000 Btuh
(15 kW).
K = Clearance to mechanical air supply
inlet.
6 feet (1.83 m) 3 feet (91 cm) above if within 10 feet
(3 m) horizontally.
L = Clearance above paved side walk or
paved driveway located on public
property.
Not allowed Not allowed
M = Clearance under veranda, porch,
deck or balcony.
Not allowed Not allowed
A= Clearance above grade, veranda,
porch, deck or balcony.
12 inches (30 cm) above anticipated
snow level.
12 inches (30 cm) above anticipated
snow level.
B= Clearance to window or door that
may be opened.
6 inches (15 cm) for appliances <
10,000
Btuh (3 kW), 12 inches (30 cm) for
appliances > 10,000 Btuh (3kW) and <
100,000 Btuh (30kW), 36 inches (91 cm)
for appliances > 100,000 Btuh (30kW).
6 inches (15 cm) for appliances <
10,000
Btuh (3 kW), 9 inches (23 cm) for
appliances > 10,000 Btuh (3 kW) and
< 50,000 Btuh (15 kW), 12 inches
(30 cm) for appliances > 50,000 Btuh
(15 kW).
C= Clearance to permanently closed
window.
* *
D= Vertical Clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (61 cm)
from the center line of the terminal.
* *
E= Clearance to unventilated soffit.
* *
F= Clearance to outside corner.
* *
G= Clearance to inside corner.
* *
v
A
D
E
V
B
V
L
C
IX
F
v
CLOSED
E
P
O
v
F
B
B
ED
B
LE
AB
R
C
FIXE
S
LE
CLO
B
RA
E
P
O
v
v
J
B
A
H
D
v
ED
X
I
M
v
X
K
Additional Considerations
Do Not install vent terminal under any patio or deck.
To help prevent moisture from freezing on walls and under
eaves, do not locate vent terminal on the side of a building
with prevailing winter winds.
To help prevent water lines from freezing do not locate vent
terminal on the side of a building with prevailing winter
winds.
Do Not terminate vent directly on brick or masonry surfaces.
A rust-resistant sheet metal backing plate
(1 x 1 foot) (30 x 30 cm) is recommended behind vent. (See
Figure.)
Do Not locate vent terminal too close to shrubbery, as flue
gasses may damage them.
Caulk all cracks, seams and joints within six (6) feet (1.8 m)
of vent terminal.
Caulk around thimble face plate for weather tight seal.
All painted surfaces should be primed to lessen the chance of
physical damage. Painted surfaces will require maintenance.
Insulate vent pipe of water heaters exposed to cold
conditions (attics, crawl spaces, etc.) with inflammable
material to help prevent moisture from accumulating in vent
pipe. The insulation should be rated for the temperature and
should not contain substances that corrode the vent pipe.
Do Not extend exposed vent pipe of water heaters outside of
building.
Guard vent against accidental contact with people and pets.
WARNING: Moisture in the flue gas will condense as it
leaves the vent terminal. In cold weather this condensate can
freeze on the exterior wall, under the eaves and on
surrounding objects. Some discoloration to the exterior of
the building is to be expected. However, improper location
or installation can result in severe damage to the structure
or exterior finish of the building
Inside
Corner
Caulk
6’ (1.8 m)
Caulk Zone
If soffit vent is too close,
block off and install new
vent at another location.
Caulk
Caulk
Rising moisture will
collect under eaves.
6’
4’
1 ft. sq. (30 x 30 cm) sheet metal plate on
brick or masonry surface, recommended.
(1.8 m)
6’ (1.8 m)
Caulk
zone or to edge of window
etc.,starting within 6’ (1.8 m).
RTV silicone caulk
(1.2 m)
12
Installing the water heater.
Vent Kit Information ( Kits sold separately.)
Vertical Termination
Adapter
Faceplate
Air Intake Tee -
Heat Fab
Air Intake Tee - Pro-
Tech or Z-Flex
Air Intake/ Vent
Termination
Adapter
12” or 36” Long
4”/7” Concentric
Pipe
Vent Outlet
Termination for
Vertical Installation
Self Tapping Screw
Kit Part Number
28-20032HHT Qty 28-20033VHT Qty 28-20034HPT Qty 28-20035VPT Qty
12” x 12” Faceplate
12” Long - 4”/7”
Concentric Pipe
Horizontal Termination
Adapter
Air Intake Tee-Heat
Fab
Self Tapping Screws
2
1
1
1
8
36” Long - 4”/7”
Concentric Pipe
Vertical Termination
Adapter
Air Intake Tee-Heat Fab
Self Tapping Screws
Vertical Outlet
Termination
1
1
1
8
1
12” x 12” Faceplate
12” Long - 4”/7”
Concentric Pipe
Horizontal Termination
Adapter
Air Intake Tee-Pro Tech
Self Tapping Screws
2
1
1
1
8
36” Long - 4”/7”
Concentric Pipe
Vertical Termination
Adapter
Air Intake Tee-Pro Tech
Self Tapping Screws
Vertical Outlet
Termination
1
1
1
8
1
17 1/2“
Long
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