Draining The Unit And Cleaning The Inlet Water Filter - A.O. Smith 710 ASME Service Manual

12-19. Draining the unit and cleaning the inlet water filter

1. Close the manual gas shut off valve.
2. Turn off power to the 710, wait a few seconds. And then turn on again.
3. Wait 30 seconds for water valves starts to completely open.
Then turn off power to the 710, yet again.
4. Close the water shut off valve.
5. Open all hot water taps in the house. When the all
water flow has ceased, close all hot water taps.
6. Have a bucket or pan to catch the water from the
drain plugs of the 710 models. Unscrew the drain
plugs to drain all the water out of the 710.
7. Wait a few minutes to ensure all water has completely
drained from unit.
8. Clean the filter: Inspect 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.
710 / 710 ASME Service Manual
Drain Plug
74
CONFIDENTIAL
Ver. 1.00
Water Valve
Drain Plug
with Filter
Gas Valve