Electra EMD 40 - Heating, RC or SH Group; Sequence Diagram

7-15
CONTROL SYSTEM
Revision Y05-01Service Manual - EMD Series
4.2. Heating, RC or SH Group
Mode: Heat, Auto (at heating)
Temp: Selected desired temperature
Fan: HIGH, MED, LOW
Timer: Any
I Feel: On or Off
Sequence Diagram
Maintains room temp. at desired level by comparing RAT or RCT to SPT.
(RT - SPT) [
o
c]
+2
+1
0
-1
-2
-3
-4
ON
OFF
ON
OFF
ON
OFF
COMP
(WVL)
HE1
HE2
ON
OFF
RV