45
NOTE: The accessory space relative humidity sensor and
humidistat are not available for single phase (-3 voltage
code) models.
Space Relative Humidity Sensor Connections — The acces-
sory space relative humidity sensor (33ZCSENSRH-01) is in-
stalled on an interior wall to measure the relative humidity of
the air within the occupied space.
The use of a standard 2 X 4 inch electrical box to accommo-
date the wiring is recommended for installation. The sensor can
be mounted directly on the wall, if acceptable by local codes.
If the sensor is installed directly on a wall service, install the
humidity sensor using 2 screws and 2 hollow wall anchors
(field supplied). Do not over tighten screws. See Fig. 57.
Fig. 57 — Space Relative Humidity Sensor
Installation
The sensor must be mounted vertically on the wall. The
Carrier logo should be orientated correctly when the sensor is
properly mounted.
Avoid corner locations. Allow at least 4 ft between the sen-
sor and any corner. Airflow near corners tends to be reduced,
resulting in erratic sensor readings. The sensor should be verti-
cally mounted approximately 5 ft up from the floor, beside the
space temperature sensor.
For wiring distances up to 500 feet, use a 3-conductor, 18 or
20 AWG cable. A CCN communication cable can be used,
although the shield is not required. The shield must be removed
from the sensor end of the cable if this cable is used. See
Fig. 58 for wiring details.
Fig. 58 — Space Relative Humidity Sensor
Connection
The power for the sensor is provided by the PremierLink
control on terminal J5-4 (+33 to +35vdc).
To Wire the Sensor
1. At the sensor, remove 4 inches of the jacket from the
cable. Strip ¼ inch of insulation from each conductor.
Route the cable through the wire clearance opening in
the center of the sensor. See Fig. 57.
2. Connect a field-supplied BLACK wire to the sensor
screw terminal marked Vin.
3. Connect a field-supplied RED wire into the sensor screw
terminal marked Io.
4. Connect the field-supplied RED wire from the sensor to
TB1-13.
5. Connect the field-supplied BLACK wire from the sensor
to TB1-7.
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 48TC units equipped with factory-installed Smoke De-
tector(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 detec-
tor’s Alarm NO contact set. The PremierLink communicates
the smoke detector’s tripped status to the CCN building con-
trol. See Fig. 45 and 46, 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 ter-
minal. Connect the other side of the NO contact set to TB1-10.
Setpoint for Dirty Filter is set at the switch. See Fig. 59.
CAUTION
Failure to follow this caution may result in permanent
damage to the sensor.
DO NOT clean or touch the sensing element with chem-
ical solvents as they can permanently damage the sensor.
CAUTION
Failure to follow this caution will result in inaccurate
sensor readings.
DO NOT mount the sensor in drafty areas such as near
heating or air-conditioning ducts, open windows, fans, or
over heat sources such as baseboard heaters, radiators,
or wall-mounted dimmers. Sensors mounted in those areas
will produce inaccurate readings.
SW2
1
2
3
4
5
6
ON
Io
Vin
Gnd
Vo
MOUNTING
HOLE
S
WIRING
OPENING
Io
Vo
Vin Gnd
BLACK
RED
TB1-7
TB1-13
Summary of Contents for WeatherMaker 48TC 04
Page 4: ...4 Fig 2 Unit Dimensional Drawing ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing cont ...
Page 21: ...21 Fig 34 48TC B07 Unit with Humidi MiZer Adaptive Dehumidification System Humidistat Wiring ...
Page 39: ...39 Fig 45 PremierLink Wiring Schematic ...
Page 40: ...40 Fig 46 PremierLink Wiring Schematic with Humidi MiZer System ...
Page 48: ...48 Fig 65 Typical RTU Open System Control Wiring Diagram ...
Page 49: ...49 Fig 66 Typical RTU Open System Control Wiring Diagram with Humidi MiZer System ...
