John Wood Takagi - 910 - Manual (Page 22)

22
MAINTENANCE AND SERVICE
WARNING
Turn off the electrical power supply and
close the manual gas control valve and the
manual water control valve before servic-
ing.
Clean the cold-water inlet filter (refer to diagram below).
Be sure that all openings for combustion and ventilation
air are not blocked.
Check that the exhaust vent pipe is not blocked.
Check the gas pressure.
Keep the area around the water heater clear. Remove
any combustible materials, gasoline or any flammable
vapors and liquids.
The manufacturer recommends having the unit checked
once a year or as necessary by a licensed technician.
If repairs are needed, any repairs should be done by a
licensed technician.
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Unit Draining and Filter Cleaning
1. Close the manual gas shut off valve.
2. Turn off power to the unit, and then turn on again.
3. Wait 30 seconds, and then turn off power to the unit, yet
again.
4. Close the water shut off valve.
5. Open all hot water taps in the house. When the residual
water flow has ceased, close all hot water taps.
6. Have a bucket or pan to catch the water from the unit’s
drain plugs. Unscrew the drain plugs to drain all the water
out of the unit.
Drain Plug
Water
Valve
Gas Valve
Drain Plug
with Filter
7. Wait a few minutes to ensure all water has completely
drained from unit.
8. Clean the filter: Check the
water filter located within
the cold inlet. With a tiny
brush, clean the water fil-
ter of any debris which
may have accumulated
and reinsert the filter back
into the cold water inlet.
9. Securely screw the drain
plugs back into place.
Hand- tighten only.