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69-0920
4
Y594 (MULTISTAGE THERMOSTAT SUBBASE) PACKAGE
ON
AUTO
FAN
SUPL.
HEAT
C1
FIELD WIRING CONNECTION
DENOTES CONNECTION POINT BETWEEN SUBBASE AND THERMOSTAT
CO
G
Y
O
R
CO STAGE
L
OFF
ON
H1
C
E
ON
SUPL. HEAT
H2
ON
SUPL. HEAT
X
W2
P
H1
FALL
C1
RISE
CO
H2
FALL
CO
RISE
L1
(HOT)
L2
1
THERMOSTAT SUBBASE
SYSTEM COMPONENTS
COMPRESSOR CONTACTOR
FAN RELAY
HEAT RELAY 1
OUTDOOR
THERMOSTAT
HEAT RELAY
CONTACT 1
HEAT RELAY 2
HEAT RELAY
CONTACT 2
HEAT RELAY 3
"X" RELAY
"P" RELAY
COOL CHANGEOVER
VALVE
SYSTEM
SWITCH
SUPL. HT.
ON
OFF
FAN
SWITCH
AUTO
ON
H1 ANTICIPATOR
H2 ANTICIPATOR
C1 ANTICIPATOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
3
4
5
6
8
9
10
11
O
P
X
E
C
L
G
Y
R
2
W2
SUPL. HT.
LED (RED)
M4563
12
10 8
12
11
9
32
4
6
5
Fig. 4. Y594J1019 Thermostat/Subbase switching and internal connections.