Carrier 50TCQD Installation Instructions Manual page 26

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
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. 42.
Fan (Pressure) Switch (NO, close on rise in pressure)
Fig. 42 - - 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. 43 - - PremierLink Wiring Remote Occupied
Refer to Form 33CS- - 58SI 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. 44.
operation through a
CTB
Thermostat
R
PL
TB1
8
J4-6
C08118
CTB
Thermostat
R
TB1
PL
2
J4-12
C08214
Space Relative Humidity Sensor — The RH sensor is not
used with 50TCQD models at this time.
Power Exhaust
PEC
TAN
GRA
Fig. 44 - - 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 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.
COMMUNICATION BUS WIRE SPECIFICATIONS —
The CCN Communication Bus wiring is field- - supplied
and field- - installed. It consists of shielded 3- - conductor
cable with drain (ground) wire. The cable selected must
be identical to the CCN Communication Bus wire used for
the entire network.
See Table 6 for recommended cable.
Table 6 – Recommended Cables
MANUFACTURER
Alpha
American
Belden
Columbia
NOTE: Conductors and drain wire must be at least 20
AWG, stranded, and tinned copper. Individual conductors
must be insulated with PVC, PVC/nylon, vinyl, Teflon, or
polyethylene. An aluminum/polyester 100% foil shield
and an outer jacket of PVC, PVC/nylon, chrome vinyl, or
Teflon with a minimum operating temperature range of
- - 20_C to 60_C is required. Do not run communication
wire in the same conduit as or next to any AC voltage
wiring.
The communication bus shields must be tied together at
each system element. If the communication bus is entirely
within one building, the resulting continuous shield must
be connected to ground at only one single point. If the
communication bus cable exits from one building and
26
TB1 PL
J8-3
15
CTB
THERMOSTAT
C
C08120
CABLE PART NO.
2413 or 5463
A22503
8772
02525