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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.
Central Desk Control
9 12
ON
OFF
ON
OFF
Recommended wire size
for Central Desk Control
installation
Wire Size
Maximum
# AWG
Allowable
Length
#24 400 ft.
#22 600 ft.
#20 900 ft.
#18 1500 ft.
#16 2000 ft.
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.
CDC
Load shedding
Auxiliary Controls
Follow the recommended wire
sizing in the table. Two wires must
be used from each CDC switch to
each individual unit.
A 24-volt transformer is contained
within the unit and no external
voltage should be applied to the
unit through the CDC terminals.
These terminals may also be used
as an interface for other systems
used to control the unit, such as
infrared detectors, key-activated
systems, etc.
Metal
cover
over
recessed
connection
space
17