Carrier 50HCQA - Manual (Page 19)

19
Outdoor Air Temperature (OAT) Sensor —
The OAT is factory--mounted in the EconoMi$er2 (FIOP
or accessory). It is a nominal 10k ohm thermistor attached
to an eyelet mounting ring.
EconoMi$ert2 —
The PremierLink control is used with EconoMi$er2
(option or accessory) for outdoor air management. The
damper position is controlled directly by the PremierLink
control; EconoMi$er2 has no internal logic device.
Outdoor air management functions can be enhanced with
field--installation of these accessory control devices:
Enthalpy control (outdoor air or differential sensors)
Space CO
2
sensor
Outdoor air CO
2
sensor
Refer to Table 3 for accessory part numbers.
Field Connections
Field connections for accessory sensor and input devices are
made at the 16--pole terminal block (TB1) located on the
control box bottom shelf in front of the PremierLink control
(See Fig. 30). Some input devices also require a 24--vac
signal source; connect at CTB terminal R at
“THERMOSTAT” connection strip for this signal source.
See connections figures on following pages for field
connection locations (and for continued connections at the
PremierLink board inputs).
Table 4 provides a summary of field connections for units
equipped with Space Sensor. Table 5 provides a summary of
field connections for units equipped with Space Thermostat.
Space Temperature (SPT) Sensors —
The PremierLink controller is factory--shipped configured for
Space Sensor Mode. A Carrier T--55 or T--56 space sensor
must be used. T--55 space temperature sensor provides a
signal of space temperature to the PremierLink control. T--56
provides same space temperature signal plus it allows for
adjustment of space temperature setpoints from the face of
the sensor by the occupants.
2 3 4 5 6 1
SW1
SEN
BRN (GND)
BLU (SPT)
RED(+)
WHT(GND)
BLK(-)
CCN COM
SENSOR WIRING
C08201
Fig. 31 -- T--55 Space Temperature Sensor Wiring
Connect T--55: See Fig. 31 for typical T--55 internal
connections. Connect the T--55 SEN terminals to TB1
terminals 1 and 3 (see Fig. 32).
SEN J6-7
J6-6
1
3
TB1 PL
SEN
C08212
Fig. 32 -- PremierLink T--55 Sensor
Connect T--56: See Fig. 33 for T--56 internal connections.
Install a jumper between SEN and SET terminals as
illustrated. Connect T--56 terminals to TB1 terminals 1, 3
and 5 (see Fig. 34).
2 3 4 5 6 1
SW1
SEN SET
Cool Warm
BRN (GND)
BLU (SPT)
RED(+)
WHT(GND)
BLK(-)
CCN COM
SENSOR WIRING
JUMPER
TERMINALS
AS SHOWN
BLK
(T56)
C08202
Fig. 33 -- T--56 Internal Connections
SEN J6-7
J6-6
1
3
TB1 PL
SEN
SET
Jumper
TB1 PL
J6-5 5 SET
C08213
Fig. 34 -- PremierLink T--56 Sensor
Connect Thermostat —
A 7--wire thermostat connection requires a 24--v power
source and a common connection. Use the R and C
terminals on the CTB’s THERMOSTAT connection strip
for these. Connect the thermostat’s Y1, Y2, W1, W2 and
G terminals to PremierLink TB1 as shown in Fig. 35.
If the 50HCQ unit is equipped with factory--installed
smoke detector(s), disconnect the factory BLU lead at
TB1--6 (Y2) before connecting the thermostat. Identify the
BLU lead originating at CTB--DDC--1; disconnect at
TB1--6 and tape off. Confirm that the second BLU lead at
TB1--6 remains connected to PremierLink J4--8.
50H
C
Q
A