Manualsbrain.com
  1. Handbücher
  2. Marken
  3. Honeywell
  4. T874
  5. Benutzerhandbuch

Honeywell T874 Benutzerhandbuch

Download
Seite von 224
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—8
96
WIRING DIAGRAMS
Fig. 44. Schematic and hookup of T874A,B,C,D,E,F with Q674B. Used in standard applications.
 
Fig. 45. Schematic and hookup of T874C,D with Q674B. Used in standard applications.
H1
FALL
L1 
(HOT)
L2
1
RH
W1
W2
O
G
Y2
Y1
RC
HEAT RELAY 2
HEAT RELAY 1
HEAT
OFF
COOL
SYSTEM
SWITCH
H1 ANTICIPATOR
C1 ANTICIPATOR
AUTO
ON
FAN
SWITCH
2
1
POWER SUPPLY.  PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
JUMPER RH, RC FOR SINGLE TRANSFORMER.
2
M2903
B
HEAT CHANGEOVER
VALVE
L1 
(HOT)
L2
1
COOL CHANGEOVER
VALVE
FAN RELAY
COMPRESSOR
CONTACTOR 2
COMPRESSOR
CONTACTOR 1
1
4
6
8
9
10
11
H2
FALL
C2 ANTICIPATOR
RISE
RISE
C1
C2
THERMOSTAT
SUBBASE
SYSTEM COMPONENTS
H2 ANTICIPATOR
NOTE:
Model Heating Cool-
ing
No.
Bulbs
Bulbs
T874A
H1
C1
T874B
H1
C1,C2
T874C
H1,H2
C1
T874D
H1,H2
C1,C2
T874E
C1,C2
T874D
H1,H2
H1
FALL
L1 
(HOT)
 L2
1
RH
W1
W2
O
G
Y2
Y1
RC
HEAT RELAY 2
HEAT RELAY 1
HEAT
OFF
COOL
SYSTEM
SWITCH
H1 ANTICIPATOR
C1 ANTICIPATOR
AUTO
ON
FAN
SWITCH
2
1
POWER SUPPLY.  PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
JUMPER RH, RC FOR SINGLE TRANSFORMER.
2
M933C
B
HEAT CHANGEOVER
VALVE
L1 
(HOT)
L2
1
COOL CHANGEOVER
VALVE
FAN RELAY
COMPRESSOR
CONTACTOR 2
COMPRESSOR
CONTACTOR 1
1
4
6
8
9
10
11
H2
FALL
C2 ANTICIPATOR
RISE
RISE
C1
C2
X1
3
OPTIONAL LED ON SOME MODELS.
THERMOSTAT
SUBBASE
SYSTEM COMPONENTS
3
H2 ANTICIPATOR