Electra EMD 40 - Heating, RC or SH Group with Autofan

7-16
CONTROL SYSTEM
Revision Y05-01
Service Manual - EMD Series
4.3. Heating, RC or SH 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 COMP, IFAN and OFAN.
(RT - SPT) [
o
c]
+2
+1
0
-1
-2
-3
-4
ON
OFF
ON
OFF
ON
OFF
COMP
(WVL)
HE1
HE2
ON
OFF
RV