Honeywell T841A - Page 4

T841A HEATING-COOLING THERMOSTATS
L1 L2
(HOT)
Fig. 3. Internal schematic and typical wiring diagram for T841A with EM. HT. and AUX. HT. LEDs. Provides cool
changeover relay control only. Cool changeover (O) wire must be connected for proper operation. Use L terminal
for compressor malfunction indication.
69-1218
4