Honeywell PRESTIGE THX9321 - Manual (Page 154)

THX9321 PRESTIGE ® 2.0 AND THX9421 PRESTIGE ® IAQ WITH EIM
68-0311—02 154
Wiring guide — Wired Indoor Sensors
Use the S1, S2, S3, or S4 terminals for wired sensors.
CAUTION
Electrical Interference (Noise) Hazard.
Can cause erratic system operation.
Keep wiring at least one foot away from large inductive
loads such as motors, line starters, lighting ballasts and
large power distribution panels.
Use shielded cable to reduce interference when
rerouting is not possible.
IMPORTANT
Erratic temperature readings from a sensor can occur
as a result of any of the wiring practices described
below. Avoid these practices to assure correct opera-
tion. Use shielded cable to reduce interference if
rerouting sensor wiring is not possible.
— Be sure wires have a cable separate from the thermo-
stat cable.
— Do not route temperature sensor wiring with building
power wiring, next to control contactors or near light
dimming circuits, electric motors or welding
equipment.
— Avoid poor wiring connections.
— Avoid intermittent or missing building earth ground.
CAUTION
Electrical Shock Hazard.
Can cause electrical shock or equipment damage.
Disconnect power supply before connecting wiring.
Wiring 4 C7189U1005 sensors (10k ohm) for temperature
averaging network. Select 10K in the Installer Setup (ISU
5030) when using C7189U1005 sensor(s).
Fig. 351. Wiring 4 C7189U sensors.
Wiring 2 TR21 sensors (20k ohm) and 1 TR21-A sensor (10k
ohm) for temperature averaging network. Select 20K in the
Installer Setup (ISU 5030) when using 2 TR21 sensors and 1
TR21-A sensor.
Fig. 352. Wiring 2 TR21 sensors and 1 TR21-A sensor.
Wiring 4 TR21 sensors (20k ohm). Select 20K in the Installer
Setup (ISU 5030) when using TR21 sensor(s).
Fig. 353. Wiring 4 TR21 sensors.
Wiring 2 TR21-A sensors (10k ohm) for temperature averaging
network. Select 20K in the Installer Setup (ISU 5030) when
using 2 TR21-A sensors in series. Note: The TR21-A sensor
must be used in combination with TR21 or TR21-A sensor.
Fig. 354. Wiring 2 TR21-A sensors.
C7189 C7189
C7189 C7189
EIM
M31472
THE NUMBER OF C7189U SENSORS MUST BE
A SQUARE NUMBER (1, 4, 9, 16, ETC.)
1
1
M31473
EIM
TR21-A
T3
T4
TR21 TR21
M31474
EIM
TR21 TR21
TR21 TR21
M31475
EIM
TR21-A
T3
T4
TR21-A
T3
T4