Takagi T-H3M-IN/OS - Manual (Page 41)

41
Page
MAINTENANCE AND SERVICE
• Clean the cold-water inlet filter (Refer to the Unit Draining and Filter Cleaning Section on this page)
• Be sure that all openings for combustion and ventilation air are not blocked
• The venting system should be checked annually for any leaks, corrosion, blockages or damage
• The burner should be checked annually for dust, lint, grease or dirt
• Keep the area around the water heater clear Remove any combustible materials, gasoline or any
flammable vapors and liquids
• In accordance with all local codes and common safety practices, water discharged from the pressure
relief valve can cause severe burns instantly from scalding DO NOT touch the pressure relief valve
• If the relief valve discharges periodically, it may be due to thermal expansion in a closed water supply
system Contact the water supplier or local plumbing inspector on how to correct this situation
• Visual check of burner flames (see below) through the burner window in the burner assembly located
at the middle of the water heater
The manufacturer recommends having the water heater checked once a year or as necessary by a licensed
technician If repairs are needed, any repairs should be done by a licensed technician
UNIT DRAINING AND FILTER CLEANING
Turn off the electrical power supply and close the manual gas shutoff valve
and the manual water control valve before servicing
WARNING
Satisfactory
Blue flame
Unsatisfactory
Flame
blowing up
Unsatisfactory
Red or Yellow
flame
1. Close the manual gas shutoff valve
2. Turn off power to the water heater and wait a couple of
seconds Turn on again
3. Wait 30 seconds, and then turn off power to the water
heater, yet again
4. Close the water shutoff 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 water
heater’s drain plugs Unscrew the Small drain plug first
and unscrew the Large drain plug next to drain all the
water out of the water heater
7. Wait a few minutes to ensure all water has completely
drained from the water heater
8. Clean the filter: Check the water filter located within the
cold inlet With a tiny brush, clean the water filter 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
Water valve
Gas
valve Drain plug
(Small)
Drain plug
with Filter (Large)
Normal Operation
Owner's Guide