John Wood Takagi - 320H-520H - Manual (Page 25)

25
INITIAL OPERATION
FOR YOUR SAFETY, READ
BEFORE OPERATING
Check the GAS and WATER CONNECTIONS for leaks
before firing unit for the first time.
Open the main gas supply valve to the unit using only
your hand to avoid any spark. Never use tools. If the
knob will not turn by hand, do not try to force it; call a
qualified service technician. Forced repair may result in
a fire or explosion due to gas leaks.
Be sure to check for the presence of leaking gas
toward the bottom of the unit because some gases are
heavier than air and may settle towards the floor.
Check the GAS PRESSURE. Refer to pg. 14.
Do not try to light the burner manually. It is equipped
with an electronic ignition device which automatically
lights the burner.
Check for PROPER VENTING and COMBUSTIBLE
AIR to the water heater.
Purge the GAS and WATER LINES to remove any air
pockets.
Do not use this water heater if any part has been
submersed under water. Immediately call a qualified
service technician to inspect the water heater and to
replace any damaged parts. •
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CAUTION
IF YOU SMELL GAS:
Do not try to start the water heater.
Do not touch any electric switches; do
not use any phone in your building.
Immediately call your gas supplier from
a neighbor’s phone. Follow the gas
supplier’s instructions.
If you cannot reach your gas supplier,
call the fire department. •
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1. Once the above checks
have been completed,
please clean filter of any
debris. Refer to pg. 29
for instructions.
2. Fully open the manual
water control valve on
the water supply line.
3. Open a hot water tap
to verify that water is
flowing to that tap. Then
close the hot water tap.
4. Fully open the manual gas
control valve installed.
5. Turn on the 120 VAC, 60
Hz power supply to the
water heater.
6. Now you are ready to
enjoy hours of endless
hot water.