Airxcel Aqua-Hot 100 Series, Руководство по обслуживанию

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Fluid Circulation Pump Fluid Circulation Pump
©Aqua-Hot®
125-DN1 Service Manual REV 220421
©Aqua-Hot®
125-DN1 Service Manual REV 220421
p. 31 p. 30
AC Electric System
Introduction:
The AC Electric system of the Aqua-Hot 125DN unit functions to
provide heat to the Aqua-Hot boiler tank. This is done with an
electric element and an electric relay.
Troubleshooting Procedure:
Troubleshoot the AC Electric system if the electric element is
not functioning properly.
The following conditions must be met before the AC Electric
system can be diagnosed, and if necessary, repaired.
•
The fluid expansion bottle is filled to at least the “COLD”
mark.
• Verify that all in-line fuses are functional.
• Ensure that the unit is completely cool.
• Ensure that DC electrical power is supplied to the Aqua-Hot.
• Ensure that AC electrical power is supplied to the element.
• Verify the thermostats are in working order.
• Verify there are no faults on the Aqua-Hot LCD.
If any of the above conditions are not met, correct them before
continuing with troubleshooting. Results of the troubleshooting
procedure cannot be verified if the conditions listed above are
not fulfilled.
Locate the Aqua-Hot LCD
screen. Navigate to the
TESTING page (Figure 61)
The AC electric relay
should let out an audible
click from within the Aqua-
Hot cabinet
Yes, click sound
Leave ELECTRIC on. Tap
PREVIOUS and activate
pump. Allow the Aqua-Hot to
get to 170°F (approximately
20 minutes)
Tap ELECTRIC
Open a hot water faucet
within the coach.
No click
sound
Verify the AC electric relay
has functionality
Verify the tank tempera-
ture on the LCD screen on
the DIAG page (180°F).
See Figure 60.
If no functionality, replace
the AC electric relay
Figure 59
If tank temperature
is not 180°F, check
element for 11.2-13
amps
Replace
the Electric
element
This AC Electric system is
operating as intended.
Hot water?
No
Yes
Replace
Controller
No
Figure 60
AC Electric System
Figure 61
Replacement Procedure:
1. Drain coolant from system. Pour into a bucket to be reused
later.
2. Remove the top and side panels from the Aqua-Hot. Save
the screws and washers to be reused later.
3. Place a paper towel into the Aqua-Hot unit on the bottom of
the cabinet. (This is to help absorb any residual coolant left
in the lines upon pump removal.)
4. Remove electrical plug to the circulation pump and move
up and out of the way.
5. Remove both hose clamps from the barbs of the pump.
• Leave the clamps on the 90° hose and hose from the
tank - to be reused later - see Figure 58.
6. Carefully remove the 90° hose from the pump.
7. Carefully remove the ump from the hose attached to the
tank.
8. Remove the pump from the Aqua-Hot and discard it.
9. Insert the new circulation pump into the Aqua-Hot and
attach it to the hose coming from the tank.
10. Attach the 90° hose to the circulation pump barb.
11. Move both hose clamps onto the barbs of the new
circulation pump.
12. Plug the connection from Step 4 into the circulation pump.
13. Reinstall the side and top panels using the saved screws
and washers from Step 2.
14. Refill the unit with the coolant saved in Step 1.
• Add more coolant if needed.
•
Monitor the newly installed parts and fittings for leaks.
Figure 58
NOTE:
The side panel has been made transparent in the
view above and below to aid in the explanation of the repair.
DO NOT remove the side panels. Doing so risks irreparable
damage to the Aqua-Hot.
Figure 57
AC High
Limit
Left High
Limit
Right High
Limit
AC Relay
Electric Element