Specifications

DX (Direct Expansion) Coil Temperature Sen-
sor —
The monitor thermostat measures DX coil tempera-
ture through a solid-state temperature sensor. The sensor can
be located up to 1000 ft from the single zone relay pack or
zone damper actuator. The sensor measures temperature with
a range of 30 to 180 F with 1/10 degree resolution. This sen-
sor is for heat pump applications only.
When the monitor thermostat is configured as a Monitor
Only thermostat, the temperature sensor is interfaced through
the single zone relay pack. See Fig. 23.
When the monitor thermostat is configured as a VVT Moni-
tor thermostat, the temperature sensor is interfaced through
the printed circuit board in the zone damper actuator. See
Fig. 24.
When the DX Coil Temperature Sensor option is set to
ON, the monitor thermostat will use information from the
temperature sensor for leaving air temperature high and low
temperature limits. The high limits for this sensor are fixed
at 105 F for second stage and 110 F for first stage. The low
limits are configured in category 4, options 5 and 6.
When the DX Coil Temperature Sensor option is set to
OFF, the monitor thermostat will not use information from
the temperature sensor for high and low temperature limits.
To configure the DX Coil Temperature Sensor option, con-
figure category 5, option 6. Use the left set point buttons to
toggle the option ON and OFF. The default value is OFF.
DX COIL TEMPERATURE SENSOR CALIBRATION —
To calibrate the DX coil temperature sensor, Configure cat-
egory 5, option 7. Obtain a correct temperature reading with
an accurate thermometer. Use the left set point buttons to
raise or lower the temperature until the desired reading is
shown. The range of possible temperatures is 30 to 180 F.
Outside-Air Temperature Sensor — The monitor
thermostat measures outside air temperature through a solid-
state temperature sensor. The sensor can be located up to
1000 ft from the single zone relay pack or zone damper
actuator. The sensor measures temperature with a range of
−20 to 150 F with 1/10 degree resolution.
When the monitor thermostat is configured as a Monitor
Only thermostat, the temperature sensor is interfaced through
the single zone relay pack. See Fig. 25.
When the monitor thermostat is configured as a VVTt
Monitor thermostat, the temperature sensor is interfaced through
the printed circuit board in the zone damper actuator. See
Fig. 26.
When the Outside Air Temperature Sensor option is set to
ON, the monitor thermostat will measure outside-air tem-
perature and broadcast the outside-air temperature informa-
tion on the network.
When the Outside Air Temperature Sensor option is set to
OFF, the monitor thermostat can receive outside air infor-
mation broadcast from another device on the network.
NOTE: A communication bus must have only one outdoor
air sensor.
To configure the Outside Air Temperature Sensor option,
configure category 5, option 8. Use the left set point buttons
to toggle the option ON and OFF. The default value is OFF.
OUTSIDE AIR TEMPERATURE SENSOR CALIBRA-
TION — To calibrate the local outside air temperature sen-
sor, configure category 5, option 9. Obtain a correct temperature
reading with an accurate thermometer. The range of possible
temperatures is −40 to 150 F. Use the left set point buttons
to raise or lower the temperature until the desired tempera-
ture is shown.
Fig. 21 — VVTT Monitor Duct Temperature
Sensor Location
Fig. 22 — Duct Temperature Sensor Wiring
(Monitor Only Configuration)
Fig. 23 — DX Coil Temperature Sensor Wiring
(Monitor Only Configuration)
Fig. 24 — DX Coil Temperature Sensor Wiring
(VVT Monitor Configuration)
Fig. 25 — Outside-Air Temperature Sensor Wiring
(Monitor Only Configuration)
Fig. 26 — Outside-Air Temperature Sensor Wiring
(VVT Monitor Configuration)
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