Central Desk Control
| CDC |
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| Load shedding | |||||
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9 |
| 12 |
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ON |
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| ON |
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OFF |
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| OFF |
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Auxiliary Controls
The Zoneline can be connected to a switch at the front desk that allows you to turn the unit on or off without going to each unit.
When the front desk switch is open the Zoneline is on. Turn the switch to closed to turn it off.
For load shedding, the CDC auxiliary switch 9 must be in the OFF (down) position and auxiliary switch 12 must be in the ON (up) position. This provides fan operation while the compressor or heater is turned off.
NOTE:
The Freeze Sentinel remains active to help protect against low temperature damage even though the unit may be off at the central control location.
IMPORTANT:
After the wire connections are completed, replace the metal cover to prevent damage to the unit or personal injury.
Metal cover over recessed connection space
Recommended wire size for Central Desk Control installation
Wire Size | Maximum | |
Allowable | ||
# AWG | ||
Length | ||
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#24 | 400 ft. | |
#22 | 600 ft. | |
#20 | 900 ft. | |
#18 | 1500 ft. | |
#16 | 2000 ft. |
Follow the recommended wire sizing in the table. Two wires must be used from each CDC switch to each individual unit.
DO NOT use a common buss in the CDC wiring.
Good wiring practices (e.g. twisted pairs, separation from power circuits) must be followed to minimize induced voltages which may harm the control system.
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