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Service and Repair
12. Connect the replacement rear panel assembly to the chassis assembly. The
screws should be torqued to 3 inch/lbs (8 cm/kg). See Figure 27.
Figure 27: Rear Panel Assembly Connection
13. Connect the rear panel assembly cables to the main PCB assembly. See Figure
28.
Figure 28: Rear Panel Assembly Cable Connections
14. Install the cover assembly on the FW-538. See Cover Assembly Replacement.
step 13 on page 33.
15. Perform the following checks/test to verify proper operation of the FW-538
prior to returning the unit into service:
• Test #1: Zone Heating Monitoring on page 9
• Test #2: Individual Thermistor Monitoring on page 9
• Test #3: Automatic Thermistor Zone Monitoring on page 10
• Output Temperature Test on page 10
Warmflo Model FW-538
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