4
SUPPLY AIR TEMPERATURE (SAT) SENSOR — The
33ZCSENSAT supply air temperature sensor is required for
reheat applications or stand-alone operation. The sensor has an
operating range of –40 to 245 F (–40 to 118 C) and includes a
6-in. stainless steel probe and cable.
DUCT AIR TEMPERATURE SENSOR — The 33ZCSENDAT
Duct Air Temperature Sensor is required for cooling only appli-
cations on non-33CS or non-Carrier dampers. The sensor is used
for supply air monitoring. The sensor has an operating range of
–40 to 245 F (–40 to 118 C) and includes a mounting grommet
and 75-in. cable.
RELATIVE HUMIDITY SENSOR — The 33AMSENRHS000
relative humidity sensor is required for zone humidity control
(dehumidification) when in a linked system with a rooftop unit
equipped with a dehumidification device. Otherwise, the RH
sensor is used for monitoring only.
NOTE: The relative humidity sensor and CO
2
sensor cannot be
used on the same zone controller.
INDOOR AIR QUALITY (CO
2
) SENSOR — An indoor air
quality sensor is required for optional demand control
ventilation. The 33ZCSENCO2 CO
2
sensor is an indoor, wall
mounted sensor with an LED display. The 33ZCT55CO2 and
33ZCT56CO2 CO
2
sensors are indoor, wall-mounted sensors
without display.
NOTE: The relative humidity sensor and CO
2
sensor cannot be
used on the same zone controller.
Mount
Zone
Controller
(Retrofit
Applica-
tions) —
The zone controller is factory-mounted on Carrier
round and rectangular dampers. When retrofitting a zone
controller on an existing damper, perform the following
procedures.
LOCATION — The zone controller must be mounted on the
air terminal’s damper actuator shaft. For service access, there
should be at least 12 in. of clearance between the front of the
zone controller and adjacent surfaces. Refer to Fig. 3.
MOUNTING — Perform the following steps to mount the
zone controller:
1. When retrofitting a zone controller on an existing
damper, prior to installing the zone controller, remove all
existing hardware.
2. Round or rectangular damper brackets may be attached to
the damper to provide a clearance for the damper bearing
when the zone controller is installed on older style VVT®
dampers. The zone controller is used to determine the
location of the bracket. Attach the bracket to the zone con-
troller using a single screw through the anti-rotation tab.
3. Visually inspect the damper and determine the direction
in which the damper shaft moves to open the damper —
clockwise (CW) or counterclockwise (CCW). Refer to
Fig. 4.
If the damper rotates CCW to open, it does not require
any configuration changes.
If the damper rotates CW to open, then the damper
actuator logic must be reversed. This is done in the
software when performing system start-up and damper
calibration test. Do not attempt to change damper rotation
by changing wiring. This will upset the damper position
feedback potentiometer readings.
4. Rotate the damper shaft to the fully closed position. Note
direction of rotation.
5. Press the release button on the actuator and rotate the
clamp in the same direction that was required to close the
damper in Step 4.
6. Press the release button on the actuator and rotate the
actuator back one position graduation. Release the button
and lock the actuator in this position.
35 in-lb (4 Nm)
80...110s
Assembled in USA
by Belimo for
CARRIER
1
0
y
bl
or
WI
5
24VAC/DC
50/60Hz
3VA 2W
CO
bl
re w
MECHANICAL
STOP
ACTUATOR
CLAMP
ASSEMBLY
MANUAL OVERRIDE
SWITCH
MOTHERBOARD
ACCESS
WIRING
ACCESS
WIRING
KNOCKOUTS
Manual
Override
Fig. 2 — Zone Controller
Содержание 3V VVT 33ZCVVTZC-01
Страница 59: ......
