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4
T841A HEATING-COOLING HEAT PUMP THERMOSTAT
Fig. 3. Internal schematic and typical wiring diagram for SUPER TRADELINE® T841A1316 with AUX. HEAT and
EM. HEAT LEDs. Provides heat or cool changeover relay control and automatic fan in EM. HEAT mode.
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
REMOVE W1-Y1 JUMPER WHEN HEAT RELAY 1 IS USED.
WHEN L TERMINAL IS CONNECTED TO SYSTEM MONITOR, EM. HEAT LED ALSO INDICATES COMPRESSOR MALFUNCTION.
X TERMINAL MUST BE CONNECTED FOR PROPER OPERATION.
1
2
3
4
H2 ANTICIPATOR
H2
FALL
H1
C1
FALL
H1 ANTICIPATOR
C1 ANTICIPATOR
SYSTEM
SWITCH
HEAT
OFF
COOL
FAN SWITCH
AUTO
ON
EM. HT.
COMPRESSOR
CONTACTOR
FAN RELAY
EM. HT.
RELAY
EM. HT.
LED (RED)
CHANGEOVER
RELAY (HEAT)
AUX. HT.
LED (GREEN)
HEAT RELAY 1
CHANGEOVER
RELAY (COOL)
AUX. HT.
RELAY
JUMPER
SYSTEM
MONITOR
O
L
G
R
E
X
W2
B
W1
Y1
3
4
2
M1103E
Fig. 4. Internal schematic and typical wiring diagram for TRADELINE® T841A1498 and T841A1506
with EM. HEAT LED. Provides cooling changeover relay control.
H2
FALL
H1
FALL
C1
L1
(HOT)
L2
1
EM. HT.
LED (RED)
OFF
COOL
HEAT
EM. HT.
SYSTEM
SWITCH
G
R
W
H
B
X
O
Y
FAN
SWITCH
AUTO
ON
FAN RELAY
HEAT RELAY
"H" RELAY
EM. HT. RELAY
CHANGEOVER
RELAY (COOL)
COMPRESSOR
CONTACTOR
H1/C1
ANTICIPATOR
H2
ANTICIPATOR
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
B TERMINAL MUST BE CONNECTED FOR PROPER OPERATION.
AUTO FAN IN EM. HEAT.
2
3
M3171B