Airxcel Aqua-Hot 200 Series, Руководство по обслуживанию, Страница: 35 / 105

Fluid Circulation Pump
©Aqua-Hot®
250-D03 Diesel Series Service Manual REV 220302
p. 35
Electric Element Replacement Procedure:
1. Ensure that the Aqua-Hot has been completely shut down
and all power sources have been disconnected. Be sure the
boiler tank is completely cooled.
2. Using hose pinch-off pliers, clamp off the heating zone inlet
and outlet ports.
3. Drain the antifreeze and water solution from the Aqua-Hot’s
boiler tank into an external container to be reused.
4. Remove the two wires secured to the defective electric
heating element by releasing the screw terminals.
5. Using a 1-½” (38mm) socket, remove the defective heating
element from the Aqua-Hot’s boiler tank.
6. Use 6 wraps of Teflon tape and pipe dope around the
threads of the new electric element to ensure that it forms
an adequate seal.
7. Install the replacement 1kW electric element into the boiler
tank and secure it with the 1-½” (38mm) socket.
8. Reconnect the wires previously disconnected from the
electric heating element and tighten the screw terminals.
9. Refill the Aqua-Hot boiler tank with the previously drained
fluid, add more 50/50 mix of propylene glycol and distilled
water to the tank if needed.
10. If necessary, purge the heat exchanger lines to remove any
and all air from the system by running the fluid circulation
pump for 20 minutes.
Failure to disconnect all power supplies and/or allow
the unit to cool before servicing could cause serious
damage and/or personal injury.
Figure 58
AC Electric System
• Using an ohmmeter, check for continuity across
wires J6-1 and J6-2 of the AC relay.
If no continuity exists at this point, the relay must be replaced.
4. Verify that the electric element has the proper resistance:
• Disconnect the AC Molex plug from the 250 AC plug.
• Move the electric on the interior control panel to the
ON position. Using an ohmmeter, test for resistance
on the white and black terminals of the Aqua-Hot
Molex terminal (Figure 59).
5. Open a hot water faucet within the RV.
• If there is hot water, the AC electric system is
operating as intended.
• If there is no hot water, replace the electric element.
6. Verify that the electric heating element is receiving
adequate AC power by completing the following:
• Plug the RV into shore power or turn on the
generator.
• Using an AC voltmeter, verify that 110V AC are
present at the Molex plug connected to the Aqua-
Hot. If there is not 110V at this plug, there is a
problem with the RV-side power.
• Using a digital clamp-meter, verify the electric
element is drawing between 8A and 8.5A. If there is
not power, replace the electric element.
Test Resistance at these wires
Figure 59
Figure 57