Internal Schematic And Typical Wiring Diagram For Y594R1300 (T874R1475/Q674L1520); Internal Schematic And Typical Wiring Diagram For Y594R1425 (T874R1616/Q674L1587) - Honeywell Q674L Installation Instructions Manual

THERMOSTAT
H1
C1
FALL
H2
H2
ANTICIPATOR
FALL
POWER SUPPLY. PROVIDE
1
DISCONNECT MEANS AND
OVERLOAD PROTECTION
AS REQUIRED.
2
CONNECT CHANGEOVER
RELAY TO B FOR HEAT
CHANGEOVER, TO O FOR
COOL CHANGEOVER.
Fig. 7. Internal schematic and typical wiring diagram for Y594R1300 (T874R1475/Q674L1520); fixed anticipation.
THERMOSTAT
H1
ANTICIPATOR
C ANTICIPATOR
H1
C
FALL
H2
ANTICIPATOR
H2
FALL
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 REMOVE JUMPER WHEN W1 RELAY IS USED.
3 FACTORY-INSTALLED JUMPER.
Fig. 8. Internal schematic and typical wiring diagram for Y594R1425 (T874R1616/Q674L1587). SUPER
TRADELINE
2
H1/C1
ANTICIAPTOR
3
FAN
SWITCH
4
AUTO
ON
5
6
8
SYSTEM
SWITCH
EM. HT.
10
HEAT
OFF
COOL
1
2
3
4
5
6
11
®
; universal model for heat, cool, or first stage heating changeover systems.
CHECK LED has isolated terminals for use in all systems.
T874R THERMOSTATS AND Q674L SUBBASES
SUBBASE
RTD 1
EM. HT.
LED (RED)
AUX. HT.
LED
(GREEN)
SUBBASE
FAN
SWITCH
AUTO
ON
SYSTEM
SWITCH
EM. HT.
HEAT
OFF
COOL
5
SYSTEM COMPONENTS
ODT 1
RTD 2
EHR 1
ODT 2
RTD 3
EHR 2
R
L
COMPRESSOR
MONITOR
X
W2
RD
G
2
COOL
CHANGEOVER VALVE
O
E
CHP
LACO
Y
COMPRESSOR
CONTACTOR
B
HEAT
CHANGEOVER VALVE
SYSTEM COMPONENTS
W3
O
COOL CHANGEOVER
VALVE
L
COMPRESSOR
MONITOR
G
R
W2
EM. HT.
AUX. HT. RELAY
LED (RED)
E
AUX. HT.
LED (GRN)
EM. HT. RELAY
X
3
HEAT
CHANGEOVER
X2
VALVE
B
W1 RELAY
W1
COMPRESSOR
2
RELAY
Y
L1 L2
(HOT)
1
RTD 1
FAN RELAY
EM. HT. RELAY
2
M1030A
W3 RELAY
FAN RELAY
L1
(HOT)
L2
1
M5067
69-0392—9