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SENSOR
(CENTER SIDE-T0 -SIDE)
9-PIN
CONNECTOR
SECURING
SCREWS
AIR HANDLER
CONTROL
AIR HANDLER CONTROL
L-BRACKET MOUNTING PLATE
19 IN.
(483 MM)
5-1/2 IN.
(140 MM)
9-PIN CONNECTOR
ELECTRIC HEAT RELAY
PART NO. 49W91
22V DIRECT CURRENT COIL
30 AMP CONTACT RATING
FASTEN THE PROBE
BRACKET TO THE
PLENUM WITH TWO
SELF-TAPPING SHEET
METAL SCREWS.
CONNECT WIRES TO DISCHARGE AIR SENSOR
TERMINAL ON AIR HANDLER CONTROL.
PLENUM
AIR HANDLER CONTROL
DISCHARGE SENSOR
(DAT)
TEMPRESISTANCE
ºF (OHMS)
30 34,566
40 26,106
50 19,904
60 15,313
70 11,884
80 9,298
90 7,332
100 5,826
NOTE — EVENHEAT MODE CANNOT BE ENABLED WITH HARMONY III DUE
TO EACH CONTROL REQUIRING ITS OWN DISCHARGE AIR SENSOR.
THE AIR HANDLER CONTROL (AHC) HAS TWO
SCREW TERMINALS MARKED DISCHARGE AIR
SENSOR. THE SENSOR IS REQUIRED FOR
EVENHEAT OPERATION, IS FIELD-MOUNTED
AND MUST BE ORDERED SEPARATELY
(CATALOG # 88K38).
DETAIL B
TEMPERATURE RESISTANCE
CHART
NOTE - Due to varying duct designs
and airflow conditions, relocation of the
discharge sensor may be required to
insure accurate sensing.
NOTE — REFER TO TABLE 1 FOR 6-PIN CONNECTOR
DESIGNATIONS.
Figure 5. Component Connections
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