18
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 sen-
sor and any corner. Airflow near corners tends to be reduced,
resulting 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,
although the shield is not required. The shield must be removed
from both ends of the cable if this cable is used.
The power for the sensor is provided by the control board.
The board provides 24 vdc for the sensor. No additional power
source is required.
To wire the sensor, perform the following:
1. At the sensor, remove 4 in. of jacket from the cable. Strip
1
/
4
in. of insulation from each conductor. Route the cable
through the wire clearance opening in the center of the
sensor.
2. Connect the RED wire to the sensor screw terminal
marked (+).
3. Install one lead from the resistor (supplied with the sen-
sor) and the WHITE wire, into the sensor screw terminal
marked (–). After tightening the screw terminal, test the
connection by pulling gently on the resistor lead.
4. Connect the remaining lead from the resistor to the
BLACK wire and secure using a field-supplied closed
end type crimp connector or wire nut.
5. Using electrical tape, insulate any exposed resistor lead to
prevent shorting.
6. At the control box, remove the jacket from the cable.
7. Strip
1
/
4
in. of insulation from each conductor.
8. Connect the RED wire to te24v on the control
board.
9. Connect the BLACK wire to terminal GND on the con-
trol board.
10. Connect the WHITE/CLEAR wire to terminal RH/IAQ
on the control board.
35 in-lb (4 Nm)
80...110s
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
1
0
yel
blu
ora
WIP
5K
LISTED
94D5
TEMP. IND. &
REG. EQUIP.
UL
Class 2 Supply
L R 9 2 8 0 0
NEMA2
24VAC/DC
50/60Hz
3VA
2W
COM
1
2
3
blk
red
wht
LINE VOLTAGE
24VAC*
SEPARATE
POWER
SUPPLY
REQUIRED*
IAQ
GND
21
87
*Do not connect to the same transformer that supplies power to the zone controller.
Fig. 25 — Indoor Air Quality Sensor Wiring
Fig. 26 — Wall Mounted Relative Humidity Sensor
(P/N 33AMSENRHS000)
