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1. Close the manual gas shutoff valve.
2. Turn off power to the unit and wait five (5) seconds.
Turn on again.
3. Wait 30 seconds, and then turn off power to the unit.
4. Close the inlet water 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. 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.
Drain the X3
™
Cartridge:
Have a bucket or pan to catch water from the X3™ Cartridge. To remove the X3
™
Cartridge, turn it left until the symbol aligns with the symbol. Pull down to remove it from the
water heater.
9. Drain the water in the X3
™
Cartridge completely.
10. Wait a few minutes to ensure all water has completely drained from the unit.
11. Keep the cold/hot water valves closed. Keep the gas valve closed. Keep supply power disconnected.
12. Securely screw the drain plugs back into place.
Hand- tighten only.
Removal of the X3
™
Cartridge:
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.
Drain plug with Filter (Large)
Drain plug
(Small)
*Drain plug for the water line of heat
exchangers
Gas
valve
Inlet water
valve
Maintenance and service
Owner's Guide
Summary of Contents for 240HX3
Page 64: ...3PL009 2000599585 Rev B ...
