John Wood Direct Vent - Manuel (Page 15)

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The T&P valve must be manually operated at least once
a year. Caution should be taken to ensure
1. no one is in front of or around the outlet of the
discharge line, and
2. the water manually discharged will not cause any
bodily injury or property damage because the water
may be extremely hot.
If after manually operating the valve, it fails to completely
reset and continues to release water, immediately close
the cold water inlet to the water heater, follow the draining
instructions in this manual, and replace the temperature-
pressure relief valve with a properly rated/sized new one.
Note: The purpose of a temperature-pressure relief valve
is to prevent excessive temperatures and pressures in
the storage tank. The T&P valve is not intended for the
constant relief of thermal expansion. A properly sized
thermal expansion tank must be installed on all closed
systems to control thermal expansion, see “Closed Water
Systems” and “Thermal Expansion” sections.
Temperature-Pressure Relief Valve And Pipe
Insulation
The T&P valve installed on this water heater is covered by
insulation to minimize heat loss. The insulation has a hole
on the bottom side to accommodate the valve outlet and
allow for the piping connection. Do not restrict the outlet
opening of the T&P valve.
T&P Relief Valve
T&P Relief Valve
Drain Line
Manual Relief Lever
T&P Relief Valve Insulation
(Outlet opening on underside)
Figure 10
Locate the temperature and pressure relief valve on the
water heater (also known as a T&P relief valve) (see
Figure 10).
1. Locate the slit running the length of the T&P relief
valve insulation.
2. Spread the slit open and fi t the insulation over the T&P
relief valve (see Figure 10). Apply gentle pressure to
the insulation to ensure that it is fully seated on the
T&P Relief Valve. Once seated, secure the insulation
with duct tape, electrical tape, or equivalent.
Important: The insulation and tape must not block the
discharge opening or hinder access to the manual relief
lever (Figure 10). Ensure a discharge pipe is installed into
the T&P valve discharge opening per the instructions in
this manual.
1. Locate the hot water (outlet) and cold water (inlet)
pipes to the water heater.
2. Locate the slit running the length of a section of pipe
insulation.
3. Spread the slit open and slip the insulation over the
cold water (inlet) pipe. Apply gentle pressure along
the length of the insulation to ensure that it is fully
seated around the pipe. Also, ensure that the base
of the insulation is fl ush with the water heater. Once
seated, secure the insulation with duct tape, electrical
tape, or equivalent.
4. Repeat steps 2 and 3 for the hot water (outlet) pipe.
5. Add additional sections of pipe insulation as needed.
FILLING THE WATER HEATER
• Avoid water heater damage.
• Fill tank with water before operating.
Property Damage Hazard
CAUTION
• Never use this water heater unless it is completely full
of water. To prevent damage to the tank, the tank must
be fi lled with water. Water must fl ow from the hot water
faucet before turning “ON” gas to the water heater.
To fi ll the water heater with water:
1. Close the water heater drain valve by turning handle
to the right (clockwise). The drain valve is on the lower
front of water heater (see Figure 9).
2. Important: If the heater is equipped with plumbing
side taps and they are not connected to piping, ensure
the side taps have been closed with pipe plugs.
3. Open all hot water faucets served by the water heater
to allow air to escape from the tank and the water
piping. Ensure any shut-off valves between the heater
and the faucets are in the open position.
4. Open the cold water supply valve to the water heater.
Notes:
• The cold water supply valve must be left open when
the water heater is in use.
• Avoid water leakage when fi lling the tank. Do not
allow the insulation of the water heater to get wet as
water can reduce the effectiveness of the insulation.
5. Allow water to run until a constant fl ow is obtained.
This will let air out of the water heater and the piping.
6. Check all water piping and connections for leaks.
Repair as needed.