Aqua-Hot AHE-100-02S, Руководство по обслуживанию

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© 2011 Aqua-Hot
®
AHE-100-02S Hydronic Heating System Service Manual—Rev. B
S
ECTION
5: A
QUA
-H
OT
C
OMPONENTS
Valves
Check Valve:
Check valves are installed into the zone outlet ports for each
heating loop to ensure that the antifreeze and water heating
solution only flows in one direction. If the heating solution
attempts to backflow into the boiler tank, the check valve
closes to prevent that from happening.
Troubleshoot the check valves if the following condition has
occurred:

There is a lack of interior heat in a particular zone.
Troubleshooting:
1.
Verify that the heating zone is operating properly by
checking the following:
A.
Verify that the room thermostat inside the interior
of the motor home is on and calling for heat.
B.
Check the circulation pump for operation by feeling
the pump for a vibration, indicating the pump is
running.
2.
With the circulation pump operating, tap on the check
valve and wait five minutes to evaluate if interior heat is
now present.
If interior heat is present after tapping the check valve,
the check valve was stuck closed and no further action is
necessary.
3. Check the Aqua-Hot’s antifreeze and water heating solu-
tion’s ratio of water to antifreeze. The mixture ratio
should be approximately 50/50. If the solution is com-
prised fully of antifreeze (100%), the check valves will
continue to stick.
NOTE:
Storing the motor home for an extended period of
time can cause the check valves to stick. If, after the initial
release of the stuck check valve, it continues to stick, follow
the instructions in this section to replace the check valve.
Replacement Procedure:
F
AILURE TO DISCONNECT ALL POWER SUPPLIES AND
/
OR
TO ALLOW THE HEATER TO COOL BEFORE SERVICING
COULD CAUSE SERIOUS DAMAGE OR PERSONAL INJURY
.
1.
Ensure that the Aqua-Hot has been completely shut
down and that all power sources have been disconnect-
ed. Also, because this replacement procedure will in-
volve the boiler tank and the potential for hot coolant, be
sure the heater has adequately cooled.
NOTE: Before Troubleshooting the zone check valve it is
important to remember that if the zone circulation pump is
air locked, or if there is a kink in a zone heating loop plumb-
ing line, the customer will experience the same symptoms as
a stuck check valve.
Figure 12