13
3. Connect the sensor cable as follows:
a. Connect one wire from the cable (RED) to the SPT
terminal on the controller. Connect the other end of
the wire to the left terminal on the SEN terminal
block of the sensor.
b. Connect another wire from the cable (BLACK) to
the ground terminal on the controller. Connect the
other end of the wire to the remaining open termi-
nal on the SEN terminal block.
c. For T56 sensors, connect the remaining wire
(WHITE/CLR) to the T56 terminal on the control-
ler. Connect the other end of the wire to the right
most terminal on the SET terminal block.
d. In the control box, connect the cable shield to
J1-3, equipment ground.
e. Install a jumper between the two center T56 termi-
nals (right SEN and left SET).
WIRING THE CCN NETWORK COMMUNICATION
SERVICE JACK — To wire the service jack, perform the
following:
1. Strip back the jacket from the CCN communication ca-
ble(s) for at least 3 inches. Strip
1
/
4
in. of insulation from
each conductor. Remove the shield and separate the drain
wire from the cable. Twist together all the shield drain
wires and fasten them together using an closed end crimp
lug or a wire nut. Tape off any exposed bare wire to pre-
vent shorting.
2. Connect the CCN + signal wire(s) (RED) to Terminal 5.
3. Connect the CCN – signal wire(s) (BLACK) to Terminal 2.
4. Connect the CCN GND signal wire(s) (WHITE/CLR) to
Terminal 4.
PRIMARY AIR TEMPERATURE SENSOR INSTALLA-
TION — A primary air temperature (PAT) sensor is used on a
zone controller which is functioning as a Linkage Coordinator
for a non-CCN (Carrier Comfort Network®)/Linkage compati-
ble air source. The part number is 33ZCSENPAT. See Fig. 17.
The sensor is also available as field-supplied accessory.
When used on a zone controller, try to select a zone control-
ler which will allow installation of the PAT sensor in the main
trunk, as close to the air source as possible. See Fig. 18.
To mount the PAT sensor, remove sensor cover.
1. Drill a
1
/
2
-in. hole in supply duct.
2. Using field-supplied drill tap screw, secure sensor to duct.
3. Connect sensor to zone controller using field-supplied
2-conductor cable. Refer to Table 9.
4. Use field-supplied wire nuts to connect cable to sensor.
5. At zone controller, connect sensor wires to PAT and GND
terminals.
INDOOR-AIR QUALITY SENSOR INSTALLATION —
The indoor-air quality (IAQ) sensor accessory monitors carbon
dioxide levels. This information is used to increase the airflow
to the zone and may also modify the position of the outdoor-air
dampers to admit more outdoor air as required to provide the
desired ventilation rate. The wall sensor is used to monitor the
conditioned space. The sensor uses infrared technology to
measure the levels of CO
2
present in the air. The wall sensor is
available with or without an LCD readout to display the CO
2
level in ppm and is also available in a combination model
which senses both temperature and CO
2
level.
The CO
2
sensors are factory set for a range of 0 to
2000 ppm and a linear voltage output of 0 to 10 vdc. Refer to
the instructions supplied with the CO
2
sensor for electrical re-
quirements and terminal locations. The sensor requires a sepa-
rate field-supplied 24 vac 25 va transformer to provide power
to the sensor. The transformer may be mounted in the control
box if space is provided (except electric heat units).
For factory configuration changes to some models of the
sensor, the User Interface Program (UIP) or Sensor Calibration
Service Kit is required.
To accurately monitor the quality of the air in the condi-
tioned air space, locate the sensor near the return air grille so it
senses the concentration of CO
2
leaving the space. The sensor
should be mounted in a location to avoid direct breath contact.
Do not mount the space sensor in drafty areas such as near
supply diffusers, open window, fans, or over heat sources. Al-
low at least 3 ft between the sensor and any corner. Avoid
mounting the sensor where it is influenced by the supply air;
the sensor gives inaccurate readings if the supply air is blown
directly onto the sensor.
To mount the sensor, refer to the installation instructions
shipped with the accessory kit.
INDOOR AIR QUALITY SENSOR WIRING — To wire the
sensor after it is mounted in the conditioned air space, see
Fig. 19-21 and the instructions shipped with the sensor. Use
Fig. 17 — Primary Air Temperature Sensor
(Part Number 33ZCSENPAT)
Fig. 18 — Primary Air Temperature
Sensor Installation
(Air-Handling Unit Discharge Locations)
Summary of Contents for 35L Series
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