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Io
Vin Gnd
Vo
Fig. 64 — Space Relative Humidity Sensor
Connection
The power for the sensor is provided by the PremierLink
controller on terminal J5-4 (+33 to +35vdc).
To wire the sensor:
1. At the sensor, remove 4 inches of the jacket from the ca-
ble. Strip
1
/
inch of insulation from each conductor.
4
Route the cable through the wire clearance opening in the
center of the sensor. See Fig. 63.
2. Connect a field-supplied BLACK wire to the sensor
screw terminal marked Vin.
3. Connect a field-supplied RED wire into the sensor screw
terminal marked Io.
4. Connect the field-supplied RED wire from the sensor to
TB1-13.
5. Connect the field-supplied BLACK wire from the sensor
to TB1-7.
SMOKE DETECTOR/FIRE SHUTDOWN (FSD) — This
function is available only when the PremierLink controller is
configured for (Space) Sensor Mode. The unit is factory-wired
for PremierLink FSD operation when the PremierLink control-
ler is factory-installed.
On 48HC units equipped with factory-installed Smoke De-
tector(s), the smoke detector controller implements the unit
shutdown through its NC contact set connected to the unit's
CTB input. The FSD function is initiated via the smoke detec-
tor's Alarm NO contact set. The PremierLink controller com-
municates the smoke detector's tripped status to the CCN
building control. See Fig. 51 and Fig. 52, typical PremierLink
controller wiring diagrams.
FILTER STATUS SWITCH — This function is available
only when the PremierLink controller is configured for (Space)
Sensor Mode.
PremierLink controller can monitor return filter status in
two ways: By monitoring a field-supplied/installed filter pres-
sure switch or via supply fan runtime hours.
Using switch input: Install the dirty filter pressure switch
according to switch manufacturer's instructions, to measure
pressure drop across the unit's return filters. Connect one side
of the switch's NO contact set to CTB's THERMOSTAT-R ter-
minal. Connect the other side of the NO contact set to TB1-10.
Setpoint for Dirty Filter is set at the switch. See Fig. 65.
TB1-7
TB1-13
49
Filter Switch (NO, close on rising pressure (high drop))
Fig. 65 — PremierLink Controller Filter Switch
Connection
When the filter switch's NO contact set closes as filter pres-
sure drop increases (indicating dirt-laden filters), the input sig-
nal to the PremierLink controller causes the filter status point to
read "DIRTY."
Using Filter Timer Hours
—
troller Installation, Start-up, and Configuration Instructions for
instructions on using the PremierLink Configuration screens
and on unit alarm sequence.
SUPPLY FAN STATUS SWITCH — The PremierLink
controller can monitor supply fan operation through a field-
supplied/installed differential pressure switch. This sequence
will prevent (or interrupt) operation of unit cooling, heating
and economizer functions until the pressure switch contacts are
closed indicating proper supply fan operation.
Install the differential pressure switch in the supply fan sec-
tion according to switch manufacturer's instructions. Arrange
the switch contact to be open on no flow and to close as pres-
sure rises indicating fan operation.
Connect one side of the switch's NO contact set to CTB's
THERMOSTAT-R terminal. Connect the other side of the NO
contact set to TB1-8. Setpoint for Supply Fan Status is set at
the switch. See Fig. 66.
Fan (Pressure) Switch (NO, close on rise in pressure)
Fig. 66 — PremierLink Controller Wiring Fan
Pressure Switch Connection
REMOTE OCCUPIED SWITCH — The PremierLink con-
troller permits a remote timeclock to override the control's on-
board occupancy schedule and place the unit into Occupied
mode. This function may also provide a "Door Switch" time
delay function that will terminate cooling and heating functions
after a 2 to 20 minute delay.
Connect one side of the NO contact set on the timeclock to
CTB's THERMOSTAT-R terminal. Connect the other side of
the timeclock contact to the unit's TB1-2 terminal (see Fig. 67).
Remote Occupied
Time Clock
Fig. 67 — PremierLink Controller Wiring Remote
Occupied
CTB
Thermostat
R
TB1
PL
10
J4-4
Refer to the PremierLink Con-
CTB
Thermostat
R
PL
TB1
8
J4-6
CTB
Thermostat
R
TB1
PL
2
J4-12
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