ROBERTS GORDON
®
CORAYVAC
®
M
ODULATING
H
EATING
C
ONTROL
C
ONTROLLER
I
NSTALLATION
M
ANUAL
88
11.4 Replacement Parts Instructions
11.4.1 Plug-In Relay
To replace the plug-in relay, turn off 120 V power to
the relay boards. Turn off the 120 V power switch on
the relay boards. Locate the malfunctioning relay and
pull the relay from its socket. Fit a new relay in the
socket. Return 120 V power to the relay board and
turn on the 120 V power switch on the relay board.
Press the reset button on the control board and close
the doors.
11.4.2 Variable Frequency Drive (VFD)
To replace the Variable Frequency Drive, turn off all
power to the drive assembly at the disconnect switch.
Mark all wires connected to the VFD, noting the ter-
minals to which they are secured. Remove all wires
from the VFD terminals. Remove the VFD from its
mounting plate by removing the four securing screws.
Verify that the input voltage noted on the rating plate
of the VFD matches the input voltage of the old VFD.
Secure the new VFD to the mounting plate with the
four screws. Return all wires to the correct VFD ter-
minals. If possible, it may be easier to partially rewire
the new VFD before mounting it to the mounting
plate. Close the door and return power to the VFD.
Reprogram the VFD's parameters according to
, run the system.
DANGER
Electrical Shock Hazard
Disconnect electric before service.
Controller must be properly grounded to an
electrical source.
Failure to follow these instructions can
result in death or electrical shock.
Summary of Contents for CORAYVAC
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Page 69: ...SECTION 8 PROGRAMMING AND TROUBLESHOOTING THE SYSTEM 65 THIS PAGE LEFT INTENTIONALLY BLANK ...
Page 71: ...SECTION 9 TROUBLESHOOTING 67 FIGURE 26 Vacuum pump does not turn on ...
Page 75: ...SECTION 9 TROUBLESHOOTING 71 FIGURE 31 Burner troubleshooting in manual mode ...
Page 77: ...SECTION 9 TROUBLESHOOTING 73 After 45 second prepurge burners do not light continued ...
Page 81: ...SECTION 9 TROUBLESHOOTING 77 FIGURE 36 Air Pressure Switch alarm ...
Page 83: ...SECTION 9 TROUBLESHOOTING 79 FIGURE 38 Repeater troubleshooting ...
Page 85: ...SECTION 9 TROUBLESHOOTING 81 BACnet MS TP troubleshooting continued ...
Page 109: ...SECTION 13 TOUCHSCREEN TREE 105 Touchscreen Tree Overview continued ...
Page 111: ...SECTION 13 TOUCHSCREEN TREE 107 FIGURE 47 Maintenance Unit FIGURE 48 Alarms ...
Page 113: ...SECTION 13 TOUCHSCREEN TREE 109 FIGURE 51 Configuration Zones FIGURE 52 Configuration Unit ...
Page 115: ...SECTION 13 TOUCHSCREEN TREE 111 FIGURE 55 Touchscreen System FIGURE 56 Touchscreen Setup ...
Page 118: ...ROBERTS GORDON CORAYVAC MODULATING HEATING CONTROL CONTROLLER INSTALLATION MANUAL 114 ...