Thermal Solutions APEX APX425C Installation, Operating And Service Instructions page 120

11
Service and Maintenance
2. Condensate Trap Removal and Reinstallation:
a. Disconnect power supply to boiler.
b. Remove 2 wire nuts and disconnect overflow
switch wire pigtails from boiler wiring.
c. Disconnect pressure switch hose from
condensate trap.
d. Disconnect outside condensate compression
fitting from condensate trap.
e. Using pliers, release spring clip securing the
overflow switch to condensate trap body and
remove the switch. Note that the switch has
factory applied silicon adhesive seal, which
may have to be carefully cut all around to
facilitate the switch removal.
f. Using pliers, release spring clip securing
condensate trap body to the heat exchanger
bottom drain connection.
g. First, pull the trap downwards to release from
the heat exchanger. Second, pull the trap end
from left side jacket panel sealing grommet
and remove the trap from boiler.
h. To reinstall the trap, reverse above steps.
i. If the original condensate overflow switch is
to be re-used, follow the appropriate switch
removal steps from Condensate Overflow
Figure 11-3: Control Compartment Access for Stacked Boiler Installations
120
APEX
(continued)
F. Control Compartment Access
1. Non-stacked boiler installations: Remove top
2. Stacked boiler installations: Remove front
Installation, Operating, & Service Instructions
Switch Removal and Replacement procedure
above.
j. Ensure that fresh silicon sealant is applied to
the overflow switch threads and the switch is
properly oriented relative to the trap body - the
arrow molded into the switch hex side end
must face down for proper switch operation.
See Figure 11-2 "Condensate Overflow Switch
Orientation" for details.
k. Ensure that pressure switch hose is reconnected
to the trap.
l. Restore power supply to boiler. Fill up the
trap (see Section 5 "Condensate Disposal")
and verify the switch operation.
front panel to access control compartment.
door and display panel. As shown in Figure
11-3, remove two screws, one inside junction
box and one on right side panel. Swing
control panel downward to access control
compartment.
106308-05 - 3/23