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On 50HCQ units equipped with factory- - installed Smoke
Detector(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 detector's Alarm NO contact set. The PremierLink
communicates the smoke detector's tripped status to the
CCN building control. See Fig. 30, the PremierLink
wiring schematic.
Filter Status Switch —
This function is available only when PremierLink is
configured for (Space) Sensor Mode.
PremierLink control can monitor return filter status in two
ways: By monitoring a field- - supplied/installed filter
pressure 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 terminal. Connect the other side of the
NO contact set to TB1- - 10. Setpoint for Dirty Filter is set
at the switch. See Fig. 42.
Filter Switch (NO, close on rising pressure (high drop))
Fig. 42 - - PremierLink Filter Switch Connection
When the filter switch's NO contact set closes as filter
pressure drop increases (indicating dirt- - laden filters), the
input signal to PremierLink causes the filter status point to
read "DIRTY".
Using Filter Timer Hours: Refer to Form 33CS- - 58SI for
instructions on using the PremierLink Configuration
screens and on unit alarm sequence.
Supply Fan Status Switch —
The PremierLink control 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
section according to switch manufacturer's instructions.
Arrange the switch contact to be open on no flow and to
close as pressure 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. 43.
CTB
Thermostat
R
TB1
PL
J4-4
10
C08216
Fan (Pressure) Switch (NO, close on rise in pressure)
Fig. 43 - - PremierLink Wiring Fan Pressure Switch
Connection
Remote Occupied Switch —
The PremierLink control 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- - 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.
Remote Occupied
Time Clock
Fig. 44 - - PremierLink Wiring Remote Occupied
Refer to Form 33CS- - 58SI for additional information on
configuring the PremierLink control for Door Switch
timer function.
Space Relative Humidity Sensor —
The RH sensor is not used with 50HCQ models at this
time.
Power Exhaust (output) —
Connect the accessory Power Exhaust contactor coils(s)
per Fig. 45.
Power Exhaust
PEC
TAN
GRA
Fig. 45 - - PremierLink Power Exhaust Output
Connection
CCN Communication Bus —
The PremierLink controller connects to the bus in a daisy
chain arrangement. Negative pins on each component
must be connected to respective negative pins, and
likewise, positive pins on each component must be
connected to respective positive pins. The controller
24
CTB
Thermostat
R
PL
TB1
8
J4-6
C08118
CTB
Thermostat
R
TB1
PL
2
J4-12
C08214
TB1
PL
15
J8-3
CTB
THERMOSTAT
C
C08120
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