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VENT, AIR PIPING AND TERMINATION
This water heater vent and air piping can be installed through the
roof or through a sidewall. Follow the procedures in this manual
for the method chosen. Refer to the information in this manual to
determine acceptable vent and air piping length.
OPTIONAL ROOM AIR
Optional room air is intended for commercial applications.
Combustion air piping to the outside is recommended for
residential applications.
Commercial applications utilizing this water heater may be
installed with a single pipe carrying the flue products to the
outside while using combustion air from the equipment room. In
order to use the room air venting option the following conditions
and considerations must be followed.
•
The unit MUST be installed with the appropriate room air kit
(Table 10).
•
The equipment room MUST be provided with properly sized
openings to assure adequate combustion air. Refer to the
instructions provided with the room air kit.
•
There will be a noticeable increase in the noise level during
normal operation from the inlet air opening.
•
Using the room air kit makes the unit vulnerable to combustion
air contamination from within the building. Please review
Prevent Combustion Air Contamination section on Page 13,
to ensure proper installation.
•
Vent system and terminations must comply with the standard
venting instructions set forth in this manual.
When utilizing the single pipe method, provisions for combustion
and ventilation air must be in accordance with Air for Combustion
and Ventilation, of the latest edition of the National Fuel Gas
Code, ANSI Z223.1.
Table 10. Optional Room Air Kit
MODEL
KIT NUMBER
150 - 200
100274659
285 - 800
100274661
400 - 800
100274662
AIR CONTAMINATION
Pool and laundry products and common household and hobby
products often contain fluorine or chlorine compounds. When
these chemicals pass through the water heater, they can form
strong acids. The acid can eat through the water heater wall,
causing serious damage and presenting a possible threat of flue
gas spillage or appliance water leakage into the building.
Please read the information given on Page 14, listing
contaminants and areas likely to contain them. If contaminating
chemicals will be present near the location of the water heater
combustion air inlet, have your installer pipe the water heater
combustion air and vent to another location, per this manual.
If the water heater combustion air inlet is located in a laundry
room or pool facility, for example, these areas will always contain
hazardous contaminants.
To prevent the potential of severe personal injury or death, check
for areas and products listed on Page 14 before installing the
water heater or air inlet piping.
If contaminants are found, you MUST:
• Remove contaminants permanently. —OR—
• Relocate air inlet and vent terminations to other areas.
PVC/ CPVC
This product has been approved for use with the PVC/CPVC
vent materials listed in Table 11.
INSTALLING VENT AND AIR PIPING
The vent connection to the appliance must be made with the
starter CPVC pipe section provided with the appliance if PVC/
CPVC vent is to be used. The field provided vent fittings must
be cemented to the CPVC pipe section using an "All Purpose
Cement" suitable for PVC and CPVC pipe. Use only the vent
materials, primer, and cement specified in Table 11 to make the
vent connections. Failure to follow this warning could result in
fire, personal injury, or death.
Use only cleaners, primers, and solvents that are approved for
the materials which are joined together.
All PVC vent pipes must be glued, properly supported, and the
exhaust must be pitched a minimum of a 1/4 inch per foot back to
the water heater (to allow drainage of condensate).
Insulation should not be used on PVC or CPVC venting materials.
The use of insulation will cause increased vent wall temperatures,
which could result in vent pipe failure.
Vent Pipe
DESCRIPTION
Vent Fittings
Room Air Kit
Room Air Kit
Room Air Filter Kit
Pipe Cement/
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
1. Work from the water heater to vent or air termination. Do not
exceed the lengths given in this manual for the air or vent
piping.
2. Cut pipe to the required lengths and deburr the inside and
outside of the pipe ends.
3. Clean all pipe ends and fittings using a clean dry rag.
(Moisture will retard curing and dirt or grease will prevent
adhesion.)
4. Chamfer outside of each pipe end to ensure even cement
distribution when joining.
5. Make sure shavings from plastic material are removed to
prevent them from entering the burner.
6. Dry fit vent or air piping to ensure proper fit up before
assembling any joint. The pipe should go a third to two-
thirds into the fitting to ensure proper sealing after cement
is applied.
20
Table 11. PVC/CPVC Vent Pipe, and Fittings
APPROVED PVC/CPVC VENT PIPE AND FITTINGS
ITEM
MATERIAL
PVC Schedule 40, 80
PVC - DWV
CPVC Schedule 40, 80
PVC Schedule 40
PVC Schedule 80
CPVC Schedule 40
CPVC Schedule 80
PVC - DMV
PVC
Primer
CPVC
STANDARD
ANSI/ASTM D1785
ANSI/ASTM D2665
ANSI/ASTM F441
ANSI/ASTM D2466
ANSI/ASTM D2467
ANSI/ASTM F438
ANSI/ASTM F439
ANSI/ASTM D2665
ANSI/ASTM D2564
ANSI/ASTM F493
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