John Wood Power Direct Vent (ENERGY STAR) - Manual (Page 8)

1. Install a readily accessible manual shut-off valve in the
gas supply line as recommended by the local utility. The
owner/operator must be shown the location of this valve
and be given instructions on how to use it to shut off the
gas to the heater.
2. Install a sediment trap (dirt leg) (if not already incorporated
as part of the water heater) as shown. The sediment trap
(dirt leg) must be no less than 76mm (3 in.) long for the
accumulation of dirt, foreign material, and water droplets.
3. Install a ground joint union between the gas control/
hermostat and the manual shut-off valve. This is to allow
easy removal of the gas control/thermostat.
4. Turn the gas supply on and check for leaks. Use a
chloride-free soap and water solution (bubbles forming
indicate a leak) or other approved method.
Gas Pressure
WARNING
Exposure to a higher gas supply pressure
may cause damage to the control, resulting
in explosion or fire. Consult your local gas
supplier and gas authorities. DO NOT PUT
INTO SERVICE IF OVER-PRESSURIZATION
HAS OCCURRED.
Important: The gas supply pressure must not exceed the
maximum supply pressure as stated on the water heater’s
data plate.
Gas Pressure Testing
Important: This water heater and its gas connection must
be leak tested before placing the appliance in operation.
•
If the code requires the gas lines to be tested at a pres-
sure exceeding 14 in. w.c. (3.5 kPa), the water heater
and its manual shut-off valve must be disconnected from
the gas supply piping system and the line capped.
•
If the gas lines are to be tested at a pressure less than
14 in. w.c. (3.5 kPa), the water heater must be isolated
from the gas supply piping system by closing its manual
shut-off valve.
U.L. recognized fuel gas and (CO) detectors are recom-
mended in all applications and should be installed using
the manufacturer’s instructions and local codes, rules, or
regulations.
Note: Air may be present in the gas lines and could prevent
the burner from lighting on initial start-up. The gas lines
should be purged of air by a qualified service technician
after installation of the gas piping system.
Venting
This water heater has a direct vent system in which all air
for combustion is taken from the outside atmosphere and all
combustion products are discharged to the outdoors.
This water heater must be properly vented for removal of
exhaust gases to the outside atmosphere. Correct installa-
tion of the vent pipe system is mandatory for the safe and
efficient operation of this water heater and is an important
factor in the life of the unit.
A Vent Kit included with this water heater consists of:
1. Two (2) 45° Vent Termination Elbows,
2. Two (2) more restrictive Vent Termination Screens,
3. Two (2) less restrictive Vent Termination Screens,
4. Air intake adapter (3 in. to 2 in. ABS reducer),
5. Blower outlet adapter (rubber coupling and gear clamps).
Vent pipe must be installed in accordance with all local and
provincial or state codes or, in the absence of such, the
latest edition of “Natural Gas and Propane Installation
Code” CSA-B149.1 (Canada), or “National Fuel Gas
Code” ANSI Z223.1 (NFPA 54) (U.S.A.).
Important: Check to make sure the vent pipe is not blocked
in any way.
Note: Do not common vent this water heater with any other
appliance. Do not install in the same chase or chimney with
a metal or high-temperature plastic from another gas or fuel
burning appliance.
DANGER
Carbon Monoxide Warning
• Follow all vent system requirements by
the local authorities having jurisdiction
over your installation.
• Failure to do so can result in death, explo-
sion or carbon monoxide poisoning.
Vent Pipe Material
The following plastic materials may be used for both the
combustion air intake and exhaust vent system subject to
local and provincial or state codes:
•
This heater is certified to be installed using Schedule 40
PVC or CPVC or polypropylene plastic vent material for
the exhaust. In Canada, the exhaust vent material must
be approved to ULC S636. ULC S636 mandates that
components from different systems must not be mixed in
the same vent runs. The combustion air intake material
may be PVC, ABS, CPVC or polypropylene. Check local
codes to determine which materials are allowed in your
area and only use approved material. All venting mate-
rial and components must be joined with the approved
primer/cleaner and solvent cement. Do not cement the
venting system to the heater.
Note: Use only solid (not foam core) piping. Plastic pipe
and fittings are available through most plumbing suppliers.
Always check the marking on the pipe to make sure you are
using the correct material.
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