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ELECTRIC HEAT RELAY
PART NO. 49W91
22V DIRECT CURRENT COIL
30 AMP CONTACT
RATING
9−PIN CONNECTOR
DETAIL B
NOTE
EVENHEAT MODE CANNOT BE ENABLED WITH HARMONY III DUE
TO EACH CONTROL REQUIRING ITS OWN DISCHARGE AIR SENSOR.
CBX40UHV
SENSOR
(CENTER SIDE−T0 −SIDE)
19 IN.
(483 MM)
9−PIN
CONNECTOR
Figure 5. Component Connections (CBX40UHV−XXX−230−6−02)
5−1/2 IN.
(140 MM)
AIR HANDLER
CONTROL
SECURING
AIR HANDLER CONTROL
SCREWS
L−BRACKET MOUNTING PLATE
CBX40UHV AIR HANDLER CONTROL
PART NO. 50W28
CONNECT WIRES TO DISCHARGE AIR SENSOR
TERMINAL ON AIR HANDLER CONTROL.
Page 11
DETAIL A
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).
DISCHARGE SENSOR
(DAT)
TEMPERATURE RESISTANCE
CHART
TEMP RESISTANCE
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
FASTEN THE PROBE
PLENUM
BRACKET TO THE
PLENUM WITH TWO
SELF−TAPPING SHEET
METAL SCREWS.
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