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36
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. 62.
R
TB1
J4-4
PL
Filter Switch (NO, close on rising pressure (high drop))
CTB
Thermostat
10
C08216
Fig. 62 -- 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--67SI 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. 63.
R
8
TB1
J4-6
PL
Fan (Pressure) Switch (NO, close on rise in pressure)
CTB
Thermostat
C08118
Fig. 63 -- 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
(see Fig. 64).
R
2
TB1
PL
Time Clock
Remote Occupied
CTB
Thermostat
J4-12
C08214
Fig. 64 -- PremierLink Wiring Remote Occupied
Refer to Form 33CS--67SI for additional information on
configuring the PremierLink control for Door Switch
timer function.
Power Exhaust (output) —
Connect the accessory Power Exhaust contactor coils(s)
per Fig. 65.
J8-3
15
C
TB1
PL
PEC
TAN
GRA
Power Exhaust
CTB
THERMOSTAT
C08120
Fig. 65 -- PremierLink Power Exhaust Output
Connection
NOTE
: The Power Exhaust and Humidi--MiZer
R
options
can not be used with PremierLink at the same time as both
options require connection at TB1--15 (AUX OUT).
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
signal pins must be wired to the signal ground pins.
Wiring connections for CCN must be made at the 3--pin
plug.
At any baud (9600, 19200, 38400 baud), the number of
controllers is limited to 239 devices maximum. Bus length
may not exceed 4000 ft, with no more than 60 total
devices on any 1000--ft section. Optically isolated RS--485
repeaters are required every 1000 ft.
NOTE
: Carrier device default is 9600 band.
48H
C
Summary of Contents for 48HC Series
Page 24: ...24 C12251 Fig 42 ComfortLink Control Wiring Diagram 48HC 3 5 Ton Units 48HC ...
Page 27: ...27 C12254 Fig 45 48HC ComfortLink with Humidi MiZer Power Wiring Diagram 575V 3 Ph 60 Hz 48HC ...
Page 29: ...29 C101145 Fig 48 PremierLink Wiring Schematic 48HC ...
Page 30: ...30 C101146 Fig 49 PremierLink Wiring Schematic with Humidi MiZerR 48HC ...
Page 39: ...39 C101147 Fig 69 RTU Open System Control Wiring Diagram 48HC ...
Page 40: ...40 C101148 Fig 70 RTU Open System Control Wiring Diagram with Humidi MiZerR 48HC ...