C7835A 1009 Discharge Air Temp Sensor Installation Instructions

C7835A1009 DISCHARGE AIR TEMPERATURE SENSOR
69-1463-2 2
2.
Drill a 5/16 in. hole in the duct at the location
selected for the sensor.
NOTE: Be sure the shoulder washer is inserted, see
Fig. 3, and fits tightly into the hole.
Fig. 3. Shoulder washer inserted on DATS.
3.
Remove the cover from the DATS case and insert
the probe into the hole drilled in step 2.
4.
Secure the DATS to the side of the duct, through
the two mounting holes in the back of the case,
with the screws supplied.
5.
Connect the three DATS terminals, see Fig. 4,
using standard thermostat wire, to any convenient
Enviracom 1,2, and 3 terminal connection.
Observe that the red heating and green cooling
lights come on momentarily.
6.
Adjust the MAX Temp dial on the DATS to the
appropriate high-limit setting. This can be set
between 110°F and 160° F (43°C and 71°C). Note
that settings between the lines are approximate
settings. The cooling low limit is adjustable
between 40°F (4°C) and 48°F (9°C) based on the
jumper position.
7.
Replace the cover on the DATS case.
Fig. 4. DATS wiring to Enviracom™ bus.
TROUBLESHOOTING
a
Heating or cooling system alerts can be cleared by cycling power, switching modes from heat to cool or vice versa, or
automatically when the equipment begins to operate correctly.
See Table 2 for resistance reading for each temperature
to determine if the DATS is reading the correct
temperature. To obtain a correct resistance
measurement, remove the sensor probe P1 connector
from the circuit board. Measure resistance across the
two sensor wires.
SHOULDER
WASHER
M19058
ENVIRACOM
BUS
C7835A WITH
COVER REMOVED
1
1
2
3
23
M14927
Table 1. LED Operation.
When DATS LED is... It means... It is corrected when...
Continuously red in heating. Heating limit was exceeded. Duct air temperature falls 10°F.
Continuously green in cooling. Cooling limit was exceeded. Duct air temperature rises 10°F.
Flashing red.
Heating system alert.
a
Discharge air is within 10°F of room
temperature continuously in heating
mode.
Flashing green.
Cooling system alert.
a
Discharge air is within 8°F of room
temperature continuously in cooling
mode.