Carrier 50TC User Manual

Page 29

Smoke Detector/Fire Shutdown (FSD) —

This function is available only when PremierLink is

configured for (Space) Sensor Mode. The unit is

factory--wired for PremierLink FSD operation when

PremierLink is factory--installed.

On 50TC--D16 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 See Figs.

41 and 42, the PremierLink wiring schematics.

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 TB3--10. Setpoint for Dirty Filter is set

at the switch. See Fig. 55.

TB3

J4-4

Filter Switch (NO, close on rising pressure (high drop))

CTB

Thermostat

C10286

Fig. 55 -- 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 TB3--8. Setpoint for Supply Fan Status

is set at the switch. See Fig. 56.

TB3

J4-6

Fan (Pressure) Switch (NO, close on rise in pressure)

CTB

Thermostat

C10287

Fig. 56 -- 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 TB3--2 terminal.

TB3

Time Clock

Remote Occupied

LCTB

Thermostat

J4-12

C10288

Fig. 57 -- 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. 58.

J8-3

TB3

PEC

TAN

Power Exhaust

CTB

THERMOSTAT

GRA

C10289

Fig. 58 -- PremierLink Power Exhaust Output

Connection

50TC

*16