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UNIT DRAINING & POWER OUTAGE (FREEZE PROTECTION)
If you will not be using your heater for a long period of time, drain the water out of the unit completely and dis-
connect power to your heater to keep the water heater from freezing and being damaged.
1. Close the manual gas shutoff valve.
2. Turn off power to the unit and wait a couple of seconds. Turn on again.
3. Wait 30 seconds, and then turn off power to the unit.
4. Close the
inlet
water valve. If the heater is part of an Easy-Link or Multi-Unit System, close the inlet and
outlet water valves to isolate the heater. Then proceed to step 5.
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. If isolation valves are installed, open
the drains to drain the water. If isolation valves are not installed, unscrew the filters and open the pressure
relief valve to drain all the water out of the unit. Do not lose the o-rings that will be on the two filter caps.
7. In addition to the large and small drain plugs, the model has another drain plug that drains the small line
that covers the water line between the primary and secondary heat exchangers*. Unscrew this drain plug
to drain the water line as well.
8. Securely screw the drain plugs back into place.
Hand- tighten only
.
Inlet water
valve
Gas
valve
Drain plug
(Small)
Drain plug
with Filter (Large)
140H
240H/340H/540H
*Drain plug for the
water line of heat
exchangers
Drain plug
with Filter (Large)
Drain plug
(Small)
Gas
valve
Inlet water
valve
Maintenance and service
Owner's Guide
Summary of Contents for 140H
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