Honeywell t841a Installation Instructions Manual page 6

T841A HEATING-COOLING THERMOSTATS
Fig. 6. Internal schematic and typical wiring diagram fo r T841A with EM. HT. LED. Provides both heat and cool
changeover relay control. Common (X) wire must be connected fo r proper operation.
DISCONNECT MEANS AND
OVERLOAD PROTECTION
AS REQUIRED.
DO NOT JUMPER E TO W2 TERMINAL.
Fig. 7. Internal schematic and typical wiring diagram for T841A with AUX. HT. and EM. HT. LEDs. Provides both
heat and cool changeover relay control. Common (X) wire must be connected for proper operation.
69-1218
J-°H hH-T-HH l~°-|-|
^ W 3 )-
m
RD
y
a J-°-VH ------------
< R
•(W 2 )-
A
AU X. HT.
LED (G R EEN )
E
a y + ° - V ° +
CHANGEOVER
EM. HT.
VALVE (HEAT)
LED (RED)
< X h
Y
< c > - -
6
ODT 1
RTD 1 ODT 1
EHR 1 RTD 2
ODT 2
-TEEh
EHR 2 RTD
r m a t
EM .H EA T
R ID 1
RELAY
-A V H — "
COM PRESSOR
CONTACTOR
CHP
+>VH —
CHANGEOVER
VALVE (COOL)
T<>v>|
L1 L2
(HOT)
M8505