Internal Schematic And Typical Wiring Diagram For Y594R1664 (T874R1871/Q674L1736) And Y594R1706 (T874R1913/Q674L1777); Internal Schematic And Typical Wiring Diagram For Y594R1615 (T874R1822/Q674L1710) - Honeywell Q674L Installation Instructions Manual

T874R THERMOSTATS AND Q674L SUBBASES
THERMOSTAT
FALL
H1
C1
FALL
H2
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 9. Internal schematic and typical wiring diagram for Y594R1664 (T874R1871/Q674L1736) and Y594R1706
(T874R1913/Q674L1777). Exact replacement for York model no. 2TH11702224.
THERMOSTAT
H1
ANTICIPATOR
C ANTICIPATOR
H1
C
FALL
H2
ANTICIPATOR
H2
FALL
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
Fig. 10. Internal schematic and typical wiring diagram for Y594R1615 (T874R1822/Q674L1710). TRADELINE;
intended for use in applications where W2 and E terminals are not jumpered.
69-0392—9
2
H1/C1
ANTICIPATOR
3
4
5
6
H2
ANTICIPATOR
11
RESET HEATER
12
1
FAN
SWITCH
2
AUTO
ON
3
SYSTEM
SWITCH
4
EM .HT.
HEAT
5
OFF
6
COOL
11
SUBBASE
FAN SWITCH
AUTO
ON
EM. HT.
LED (RED)
SYSTEM
SWITCH
EM. HT.
HEAT
OFF
COOL
SUBBASE
CHECK
LED (RED)
EM. HT.
LED
(RED)
AUX. HT.
LED
(GREEN)
6
SYSTEM COMPONENTS
1
FAN RELAY
G
R
AUX. HT. RELAY
W
H
"H" RELAY
B
X
EM. HT. RELAY
T
C815A1039
THERMISTOR
O
CHANGEOVER VALVE (COOL)
Y
COMPRESSOR
CONTACTOR
SYSTEM COMPONENTS
W3 RELAY
W3
O
COOL
CHANGEOVER VALVE
L
COMPRESSOR
MONITOR
FAN RELAY
G
R
W2
AUX. HT. RELAY
E
EM. HT. RELAY
X
B
HEAT
CHANGEOVER VALVE
Y
COMPRESSOR
RELAY
L1 L2
(HOT)
M3173A
1
L1
(HOT)
L2
M5068