Electra EMD 40 - Heating, RH Group, with Autofan

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CONTROL SYSTEM
Revision Y05-01
Service Manual - EMD Series
4.5. Heating, RH Group, with Autofan
Mode: Heat, Auto (at Heating)
Temp: Selected desired temperature
Fan: Auto
Timer: Any
I Feel: On or Off
Sequence Diagram
Maintains room temp at desired level by controlling the 2-Stage Electric Heaters.
(RT - SPT) in
o
c
+2
+1
0
-1
-2
-3
ON
OFF
ON
OFF
HE1
HE2
H
OFF
L
30 sec
M
IFAN
-2
-4
-1
-3