John Wood Superflue Power Vent (before FVIR technology) - Manual (Page 10)

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The discharge line from the temperature and pressure
relief valve must:
1. not be smaller than the outlet pipe size of the valve.
2. not be threaded, capped nor plugged.
3. not be connected directly to a drain.
4. not contact any live electrical part.
5. be of a material able to withstand 210°F water with-
out distortion.
6. be protected from freezing.
7. terminate not less than 6” nor more than 12” above
a floor drain, or be piped external to the building.
8. terminate close to a drain of adequate capacity.
For protection against excessive temperatures and
pressure, install temperature and pressure protec-
tive equipment required by local codes, but no less
than a combination temperature and pressure relief
valve certified as meeting the requirements for Relief
Valves and Automatic Gas Shutoff Devices for Hot
Water Supply Systems, ANSI Z21.22 • CSA 4.4, by
a nationally recognized testing laboratory that main-
tains periodic inspection of production of listed
equipment or materials. The temperature and pres-
sure relief valve, either original or replacement, shall
be marked with a maximum set pressure not to
exceed the maximum working pressure of the water
heater. The temperature and pressure relief valve
shall also have an hourly rated temperature steam
BTU discharge capacity not less than the hourly rat-
ing of the water heater.
Provide tubing so that any discharge from the tem-
perature and pressure relief valve will exit within 6”
above, or any distance below the structural floor and
cannot contact any live electrical part. It is recom-
mended that a minimum clearance of 4” be provided
on the side of the water heater for servicing and
maintenance of the temperature and pressure relief
valve.
Failure to install and maintain a new, listed 3/4”
temperature and pressure relief valve will
release the manufacturer from any claim which
might result from excessive temperatures and
pressures.
If this water heater is installed in a closed water supply
system, such as one having a back–flow preventer in
the cold water supply, provisions must be made to con-
trol thermal expansion. Remember, water, when heat-
ed, will expand. Failure to provide means to control
thermal expansion may cause the temperature & pres-
sure relief valve on the heater to discharge water peri-
odically. Your local water supplier or local plumbing
inspector should be contacted on how to control this sit-
uation. NEVER PLUG OR REMOVE the temperature
and pressure relief valve.
Never operate the water heater with the cold water sup-
ply valve closed, or without first checking to ensure that
the heater is filled with water.
V) POWER SUPPLY
The power supply required for this heater is 120V, 60
Hz AC. A three–wire cord and plug is provided on the
heater. This must be plugged into a 120V, electrically
grounded, fused 15A receptacle. The electrical supply
must be electrically grounded in accordance with local
codes or in the absence of local codes, with the
National Electrical Code, ANSI/NFPA 70 and/or CSA
C22.1 Electrical Code. No switch should be provided
in that line which might be accidentally turned off.
Ensure that the power supply has a neutral ground con-
nection. If necessary, provide a new outlet from the
fuse panel to within 5’ of the heater. Do not use an
extension cord to reach a receptacle.
Caution: Label all wires prior to disconnecting when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing. This Gas
Control is polarity sensitive.
If wiring has to be replaced, use only TYPE TEW 105°C
wire, except ignitor wires. If there is a problem with igni-
tor wires, replace ignitor assembly in its entirety.
WARNING
CAUTION
Do not install any valve between the
water heater and the temperature and
pressure relief valve.
WARNING
When the unit is plugged in, 120VAC is
present at the electric connections of
the control.