Download Print this page

Internal Schematic And Typical Wiring Diagram For Y594R1763 (T874R1954/Q674L1827); Internal Schematic And Typical Wiring Diagram For Y594R1243 (T874R1152/Q674L1207) - Honeywell Q674L Installation Instructions Manual

Thermostats with subbases
Hide thumbs

Advertisement

Table of Contents
T874R THERMOSTATS AND Q674L SUBBASES
THERMOSTAT
H1
C1
FALL
H2
FALL
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
1
OVERLOAD PROTECTION AS REQUIRED.
2
FIELD REMOVABLE JUMPER.
Fig. 5. Internal schematic and typical wiring diagram for Y594R1763 (T874R1954/Q674L1827). Replaces
GE AY28X078, AY28X139; Trane Baystat 139, Baystat 239 and Baystat 240;
THERMOSTAT
H1/C1
ANTICIPATOR
FALL
H1
C1
H2
ANTICIPATOR
H2
FALL
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
AUXILIARY HEAT LED AVAILABLE ON SOME MODELS.
Fig. 6. Internal schematic and typical wiring diagram for Y594R1243 (T874R1152/Q674L1207).
69-0392—9
1
2
3
4
5
SYSTEM
SWITCH
EM. HT.
6
HEAT
11
and Honeywell Y594R1136 Thermostats.
SUBBASE
2
3
FAN SWITCH
AUTO
4
ON
5
6
SYSTEM
SWITCH
EM. HT.
HEAT
OFF
COOL
SUBBASE
AUX. HT.
AUTO
LED (GREEN)
ON
EM. HT.
FAN
LED (RED)
SWITCH
OFF
COOL
R
W3
W2
AUX. HT.
LED
(GREEN)
2
X
EM. HT.
LED (RED)
L
G
O
E
Y
B
4
SYSTEM COMPONENTS
G
FAN RELAY
W
AUX. HEATER
2
RELAY
U
B
COMPRESSOR
MONITOR
F
R
T
X2
OUTDOOR
THERMOSTAT
O
COMPRESSOR
RELAY
Y
SYSTEM COMPONENTS
L2
(HOT) L1
ODT 1
RTD 1
EHR 1
ODT 2
EHR 2
SYSTEM
MONITOR
RD
COOL CHANGEOVER
VALVE
LACO
COMPRESSOR
CONTACTOR
1
L1
(HOT)
L2
OUTDOOR
THERMISTOR
COOL
CHANGEOVER
VALVE
M2970
1
RTD 2
RTD 3
RTD 1
FAN RELAY
EM. HT.
RELAY
CHP
M5072A

Hide quick links:

Advertisement

Table of Contents
loading

  Related Manuals for Honeywell Q674L