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ITEM DESCRIPTION FIELD PART NUMBER
Motorized Fan 4627410 0
Air Pressure Switch 46273100
24 VAC Relay for CAS-4 46161400
Figure 12 shows how the DIP-1 should be attached to the CAS. Note that the
1
⁄4" OD plaster tubing on the top
of the CAS unit must be cut and a 3-way male barb TEE suitable for
3
⁄16" I.D. tubing placed as shown in order
to connect the DIP-1.
MAINTENANCE
Inspect the system annually to ensure proper operation by observing that the fan activates when a call for 1.
heat occurs and deactivates when the call for heat is satisfied.
Disconnect power to the CAS unit and repeat Step 1. Note: The unit should not run and the appliance 2.
should not fire in this condition.
Inspect the duct pipe for cracks and security to the CAS unit, VRV (if installed), and vent hood.3.
Clear any obstructions, if present, from the inlet of the vent hood and the outlet of the CAS unit.4.
Periodically, the fan blade chamber may need cleaning. First, disconnect the power supply to the CAS. 5.
Next, disconnect the duct pipe from the unit. Then remove the top pan and clean the fan housing area as
needed. Reattach the top pan, reconnect the duct pipe and the power supply.
REPLACEMENT PARTS
The following items are available for replacement, if needed. In order to replace these parts, power must be
disconnected and the unit must be disassembled. If this is necessary, take note of the positions and locations
of whatever items that may need to be removed to replace other items.
If in doubt, please consult Field Controls Technical Support at 1-800-742-8368.
Figure 12
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