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Honeywell H7625B Installation Instructions Manual page 3

Duct-mount and outdoor-mount humidity/temperature sensors

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H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS
WIRING
For voltage output, shielded cable (16-22 AWG) should
be used.
For current output, either shielded cable or twisted pair
(16-22 AWG) can be used.
NOTE: When using shielded cable, ground the shield
only at the controller end (see Fig. 2). Grounding
both ends can cause a ground loop.
The 20K ohm NTC temperature output is accessed
through the separate blue and green wires (located inside
the enclosure).
T7770 REMOTE SENSOR
9
T7350
SUBBASE
1
2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.
2
3
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.
4
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
5
HC AND HP PROVIDE 24 VAC TO THE HUMIDITY SENSOR.
8
7
6
5
4
3
2
1
T5
T6
T7
T4
T3
5
HS
HC
HP
Vo
Gnd
Vin
(0-10 Vdc)
(Vac)
HUMIDITY SENSOR
L2
L1
(HOT)
Fig. 3. Humidity sensor (0-10 Vdc output) wiring with T7350
(use with RH/Temperature combination T7350 units only).
mA OUTPUT
TRANSDUCER
ONLY
Vin
Fig. 2. Typical wiring diagram for transducer with two-
wire mA output and external DC power supply.
OUTDOOR
AIR
SENSOR
DISCHARGE
AIR
COMPRESSOR
CONTACTOR 4
SENSOR
OS
OS
AS
AS
W3/Y4 Y3
M
M
X
RH
RC
AUX
3
MOTION
SENSOR
4
ECONOMIZER
3
Io
HEAT
RELAY 2
COMPRESSOR
CONTACTOR 2
W2
Y2
W1
Y1
G
COMPRESSOR
CONTACTOR 3
FAN
HEAT
RELAY
RELAY 1
COMPRESSOR
CONTACTOR 1
18 TO 36 Vdc
POWER SUPPLY
+
CONTROLLER, METER
OR RECORDER
+
INPUT SIGNAL
COMMON
GROUND
M22528
M22529
63-2579—3

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This manual is also suitable for:

H7635cH7635bH7655b