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69-0920
6
Y594 (MULTISTAGE THERMOSTAT SUBBASE) PACKAGE
ON
AUTO
FAN
C1
FIELD WIRING CONNECTION
DENOTES CONNECTION POINT BETWEEN SUBBASE AND THERMOSTAT
CO
G
Y
O
R
OFF
H1
E
SUPL. HEAT
H2
SUPL. HEAT
L
W2
SUPL. HEAT
ON
ON
ON
C
SUPL. HEAT
8
9
1
6
4
10
H2 ANTICIPATOR
1
SUPL. HT.
LED (RED)
M4565
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
SYSTEM COMPONENTSSUBBASETHERMOSTAT
L1
(HOT)
L2
1
H1
FALL
H2
FALL
2
4
6
O
G
R
W
2
E
L
C
Y
CO
RISE
C1
RISE
8
9
10
H1 ANTICIPATOR
C1 ANTICIPATOR
SYSTEM
SWITCH
SUPL. HT.
ON
OFF
FAN
SWITCH
AUTO
ON
FAN RELAY
COOL CHANGEOVER VALVE
OUTDOOR
THERMOSTAT
EM. HT. RELAY 1
EM. HT. RELAY
CONTACT 1
EM. HT. RELAY 2
EM. HT. RELAY
CONTACT 2
EM.HT.
RELAY 3
2
COMPRESSOR
CONTACTOR 1
N.O. SWITCH – INSTALLER ADDED, TO LIGHT EM. HT. LED
WHEN COMPRESSOR OPERATION IS NOT NORMAL.
2
2
Fig. 6. Y594G1674 Thermostat/Subbase switching and internal connections.