Humidity Sensor (Wall-Mounted) Installation - Carrier 35L Series Installation And Start-Up Instructions Manual

Fig. 22 — Indoor Air Quality Sensor
(Wall-Mounted Version Shown) 33ZCSENCO2
Fig. 23 — Ventilation Rates Based on CO
0 1
H F 2 3 B J 0 4 2
M a d e i n S w i t z e r l a n d
b y B e l i m o A u t o m a t i o n
35 in-lb (4 Nm)
80...110s
L R 9 2 8 0 0
NEMA 2
LISTED
94D5 U L
TEMP. IND. &
REG. EQUIP.
Class 2 Supply
24VAC/DC
50/60Hz
3VA 2W
5K
COM
WIP 1 2 3
ora
yel blu wht
blk red
Set Point
2
Fig. 24 — Indoor Air Quality Sensor Wiring
16

HUMIDITY SENSOR (WALL-MOUNTED) INSTALLATION

The accessory space humidity sensor is field-supplied and
installed on an interior wall to measure the relative humidity
of the air within the occupied space. See Fig. 25.
The use of a standard 2-in x 4-in. 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 surface, install the
humidity sensor using 2 screws and 2 hollow wall anchors
(field-supplied); do not over-tighten screws.
CAUTION
Do NOT clean or touch sensing element with chemical
solvents. They will permanently damage the sensor.
The sensor must be mounted vertically on the wall. The Car-
rier logo should be oriented correctly when the sensor is
properly mounted.
DO NOT mount the sensor in drafty areas such as near heat-
ing or air-conditioning ducts, open windows, fans, or over
heat sources such as baseboard heaters, radiators, or wall-
mounted light dimmers. Sensors mounted in those areas will
produce inaccurate readings.
Avoid corner locations. Allow at least 4 ft between the sensor
and any corner. Airflow near corners tends to be reduced, re-
sulting in erratic sensor readings.
Sensor should be vertically mounted approximately 5 ft up
from the floor, beside the space temperature sensor.
For distances up to 500 feet, use a 3-conductor, 18 or 20
AWG cable. A CCN communication cable can be used, al-
though the shield is not required. The shield must be removed
from both ends of the cable if this cable is used.
IAQ
GND
21 87
24VAC LINE VOLTAGE
SEPARATE
POWER
SUPPLY
REQUIRED*