Specifications

RELAY PACK INSTALLATION — Use the following pro-
cedure to install the CHR-03, CHR-06, and CHR-06W relay
packs for damper mount applications. (For details on install-
ing the Universal Relay Pack refer to separate 33CSZRP-06
Installation Instructions.)
1. Remove the cover from the VVT damper.
2. Insert HVAC cable through the slot on the motor side of
the damper.
3. Lay the HVAC cable along the bottom of the damper box
and insert the relay pack into the zone damper enclosure
with the relays on the motor side of the damper.
4. Locate the standoffs inside the damper. Align the relay
pack with the standoffs, insert screws and secure the re-
lay pack in place. Use of screw starter or a magnetized
screwdriver is recommended.
5. Connect the 2-pin connector plug to the 24 vac connector
on the damper board. See Fig. 8 and 9. Connect the 7-pin
connector plug to the relay connector on the damper board.
See Fig. 8 and 9.
6. Wire HVAC cable to the HVAC unit.
7. Install cover.
NOTE: The CHR-03, CHR-06, CHR-06W, and 33CSZRP-06
relay packs do not install into high-torque actuators.
Wiring Connections for VVT Monitor-Only
Applications
WIRE SENSORS TO RELAY PACK — On monitor-only
systems, the sensor wiring is connected to the relay pack.
See Fig. 10.
NOTE: Humidity sensor and filter status sensor cannot both
be wired to the same relay pack.
RELAY PACK INSTALLATION —The outdoor-duty rated
relay pack should be installed in the HVAC (heating, ven-
tilation and air conditioning) unit control box if climate or
space conditions allow. The operating environment for the
33CSUCE-06 relay pack is −22 to 149 F at a non-condensing
humidity of 10 to 95%. For further details on installing the
33CSUCE-06 relay pack refer to 33CSUCE-06 Relay Pack
Installation Instructions.
WIRE RELAY PACK TO THERMOSTAT — Wire each ther-
mostat to its respective relay pack as shown in Fig. 11. Wir-
ing connections should be made at the wiring connector board
of the thermostat.
Electric shock can cause injury or death. Ensure power
to the HVAC unit has been disconnected before wiring.
WIRE RELAY PACK TO HVAC UNIT — Wire the relay
pack to the HVAC unit as shown in Fig. 12 or 13. Refer to
Fig. 12 for Monitor-Only relay packs. Refer to Fig. 13 for
Monitor-Only relay packs with auxiliary relays. All wiring
and the relay pack should be kept a minimum of 12 in. away
from any cables carrying AC current. For more information
refer to the installation instructions included with each relay
pack.
Indoor-Air Quality Sensor Installation — An
indoor-air quality (IAQ) sensor is designed for use with the
Carrier Comfort system. The sensor has a range of 0 to
5000 ppm of CO
2
. The factory setting is 1000 ppm. This set
point is adjustable only through software. An isolated power
supply of 16 to 24 vac is required, with a 300 mA average
and a 500 mA peak. The IAQ sensors are available in 3 mod-
els: Wall Mount with LED (light-emitting diode), Wall Mount,
and Duct Mount.
The wall-mounted sensors are mounted within the occu-
pied space. They read the CO
2
levels at their location. The
Wall Mount with LED sensor will display the current read-
ing on the LED display screen on the sensor.
The duct-mounted sensor is mounted in the duct (typi-
cally the return air duct). The sensor reads the level of CO
2
at its location. The sensor is shipped mounted in an aspirator
box for mounting to the ductwork. A 1
1
⁄ 2 -in. hole is required
for the sensor sampling tube.
When the IAQ sensor is used in Monitor-Only applica-
tions, it is usually mounted in the return air duct and wired
to the relay pack. When the IAQ sensor is used in VVT Moni-
tor applications, it is usually duct-mounted and wired to the
bypass controller damper. The IAQ sensor can also be wired
to the zone controller damper for local IAQ monitoring only.
MONITOR-ONLY MODE IAQ WIRING — Wire the dry
contact relay output from the sensor (connections 3 and 4)
to terminals 6 and 7 of the relay pack. Recommended gage
of wire is 14, stranded.
Wire the 2 wires from the isolated 16 to 24 vac power
supply to the power input side of the sensor (connections 1 and5).
Recommended gage of wire is 14, stranded. The green/red LED
on the sensor shows steady green during normal operation.
Configure the options associated with the sensor. Refer to
the Indoor-Air Quality Function section on page 23.
VVTt MONITOR MODE IAQ WIRING — Wire the dry
contact relay output from the sensor (connections 3 and 4)
to the red and black wires of the "O" section of the pressure
sensor harness of the bypass controller damper. The pres-
sure sensor harness is supplied with a pressure sensor for
use with the bypass damper. Recommended gage of wire is
14, stranded.
Wire the 2 wires from the isolated 24 vac power supply
to the power input side of the sensor (connections 1 and 5).
Recommended gage of wire is 14, stranded. The green/red
LED on the sensor shows steady green during normal
operation.
Configure the options associated with the sensor. Refer to
the Indoor-Air Quality Function section on page 23.
Provide Power to Relay Pack or Damper
Actuator —
After the wiring has been completed, pro-
vide power to the relay pack or damper actuator. Once power
has been provided, the relay pack or damper actuator will
provide power to the thermostat. The heating or cooling set
points will appear on the thermostat display screen. The moni-
tor thermostat is now ready to be programmed. If the display
is blank or blinking, recheck the wiring connections
between the monitor thermostat and relay pack or damper
actuator. There should be a steady 10 vdc between the red
and white connections.
5