Maintenance And Service - Takagi 710 Installation Manual And Owner's Manual

WARNING: Turn off the electrical power supply and close the manual gas
control valve and the manual water control valve before servicing.
 Clean the cold-water inlet filter. (Refer to diagram below)
 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 vale 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.
Blue flame
Satisfactory
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.
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.
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 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.

MAINTENANCE AND SERVICE

Flame
blowing up
Unsatisfactory
Red or Yellow
flame
Drain Plug
- 35 -
Unsatisfactory
Gas Valve
Water Valve
Drain Plug
with Filter