– 10 –
Vanguard
®
Control Board (VCB)
To replace the VCB (PC1):
1. Turn off the circuit breakers powering all power supplies.
2. Remove all connections to the VCB, including incoming signal from the VFC-3000
controller/Vanguard
®
Field Controller and outgoing signal to the modules and
sensors.
3. Remove the screws holding the board in place, and carefully remove the failed VCB.
4. Position the new board in the enclosure and secure with the screws removed in
Step 3
. Securely fasten the screws to ensure proper grounding.
5. Reconnect all connections removed in
Step 2
.
6. Match the address of the new VCB to the address of the VCB being replaced.
7. Restore power.
Ventilation Fan and Filter Maintenance
Each time an intake fan assembly is opened, perform the following:
• Check the fan blades for dirt and debris. Clean the fan blades to maintain the
fan’s efficiency and to ensure proper cooling. If the fan blades have a large
accumulation of dirt and debris, change the filters more often.
• Spin the fan blades with a pen or pencil to ensure the bearings are free and the
fan is balanced.
•
Check the filters every year. Clean the filters with water and a mild detergent,
such as dish soap.
•
Compressed air can be used to clean the filter provided the nozzle is held at
least 6" away from the filter, the pressure is no greater than 60 psi, and the air is
blown through the filter opposite the airflow direction as indicated by the arrow
stamped on the filter frame.
Filter Replacement
1. Turn off the intake fan breaker.
2. Loosen the
1
/
4
-turn fasteners in the upper corners of the intake fan assembly panel.
3.
Rotate the intake assembly forward and slide the filter out.
4.
Slide a new filter into the panel. Ensure the filter is oriented in the same position as the
filter being replaced.
5. Rotate the fan assembly back into its original position and tighten the
1
/
4
-turn
fasteners.
Fan Replacement
1. Unplug the fan cord and cut the cable ties.
2.
Remove the hardware holding the fan and finger guard in place.
3. Remove the failed ventilation fan.
To replace the ventilation intake fan, follow the previous steps in reverse order. Ensure the
fan is properly oriented.
