Honeywell CT1800 Owner's Manual - Page 5

FOR CT1802 heating/cooling, Subbase Terminal, Control Function

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4-WIRE SYSTEM 5-WIRE SYSTEM 2 G FAN ON AUTO RC RH W Y HEAT COOL OFF HEATING RELAY OR VALVE COIL FAN RELAY COOLING CONTACTOR COIL G FAN ON AUTO RC RH W Y HEAT COOL OFF HEATING RELAY OR VALVE COIL FAN RELAY COOLING CONTACTOR COIL 1 L1 (HOT) L2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 INSTALL JUMPER BETWEEN RC AND RH. M2414 1 L1 (HOT) L2 1 L1 (HOT) L2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M2413 Subbase Terminal R or RH RX W Y G B O P TABLE 2-TERMINAL DESIGNATIONS. Control Function Heating transformer power to control circuit Cooling transformer power to control circuit Heating relay or valve Cooling relay Fan relay Heating changeover valve or damper control circuit Cooling changeover valve or damper control circuit Heat pump compressor control circuit. FOR CT1802 heating/cooling Connect the wires to matching terminals on the subbase. Firmly tighten screws. Push excess wire back into wall, and plug hole in wall with nonflammable insulation to prevent drafts from affecting thermostat operation. CENTRAL ELECTRIC SYSTEM W Y B P R O G FAN ON AUTO HEAT COOL OFF COOLING CONTACTOR COIL FAN RELAY HEATING RELAY OR VALVE COIL 1 L2 L1 (HOT) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M2412A SINGLE STAGE HEAT PUMP (WITHOUT AUXILIARY HEAT) SYSTEM 3W Y B 2 P R O G FAN ON AUTO HEAT COOL OFF COMPRESSOR CONTACTOR COIL REVERSING VALVE FAN RELAY L2 L1 (HOT) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 IF COMPRESSOR IS CONNECTED TO OLD THERMOSTAT'S "Y" TERMINAL WITH A JUMPER TO "W", USE NEW THERMOSTAT'S "P" TERMINAL FOR COMPRESSOR. IF OLD THERMOSTAT HAS ONE WIRE TO "Y" AND ONE TO "W", USE "Y" AND "W" ON NEW THERMOSTAT; DO NOT USE "P". IMPORTANT- IF OLD THERMOSTAT USES A W2 (AUXILIARY OR EMERGENCY HEAT) TERMINAL, THIS THERMOSTAT MAY NOT BE USED. THIS THERMOSTAT IS NOT DESIGNED TO CONTROL AUXILIARY HEAT. 3 SOME HEAT PUMPS USE "B" INSTEAD OF "O". M2415B 5 69-0394-3

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5
69-0394—3
AUTO
OFF
COOL
HEAT
ON
FAN
W
Y
G
M2413
HEATING
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
FAN
RELAY
L1
(HOT)
L2
POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
RC
RH
L1
(HOT)
L2
1
1
5-WIRE SYSTEM
AUTO
OFF
COOL
HEAT
ON
FAN
W
Y
G
M2414
HEATING
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
FAN
RELAY
POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
RC
RH
L1
(HOT)
L2
1
2
INSTALL JUMPER BETWEEN RC AND RH.
2
4-WIRE SYSTEM
TABLE 2—TERMINAL DESIGNATIONS.
FOR CT1802 heating/cooling
Connect the wires to matching terminals on the
subbase. Firmly tighten screws.
Push excess wire back into wall, and plug hole in
wall with nonflammable insulation to prevent drafts
from affecting thermostat operation.
AUTO
OFF
COOL
HEAT
ON
FAN
B
O
W
Y
R
G
M2415B
P
COMPRESSOR
CONTACTOR
COIL
REVERSING
VALVE
L1
(HOT)
L2
POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
IF COMPRESSOR IS CONNECTED TO OLD THERMOSTAT'S
"Y" TERMINAL WITH A JUMPER TO "W", USE NEW THERMOSTAT'S
"P" TERMINAL FOR COMPRESSOR.
IF OLD THERMOSTAT HAS
ONE WIRE TO "Y" AND ONE TO "W", USE "Y" AND "W" ON NEW
THERMOSTAT; DO NOT USE "P".
IMPORTANT– IF OLD
THERMOSTAT USES A W2 (AUXILIARY OR EMERGENCY HEAT)
TERMINAL, THIS THERMOSTAT MAY NOT BE USED.
THIS
THERMOSTAT IS NOT DESIGNED TO CONTROL AUXILIARY HEAT.
SOME HEAT PUMPS USE "B" INSTEAD OF "O".
1
SINGLE STAGE HEAT PUMP
(WITHOUT AUXILIARY HEAT) SYSTEM
2
3
3
2
FAN
RELAY
AUTO
OFF
COOL
HEAT
ON
FAN
B
O
W
Y
R
G
M2412A
P
COOLING
CONTACTOR
COIL
HEATING
RELAY OR
VALVE COIL
FAN
RELAY
L1
(HOT)
L2
POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
1
CENTRAL ELECTRIC SYSTEM
Subbase Terminal
Control Function
R or RH
Heating transformer power to control circuit
RX
Cooling transformer power to control circuit
W
Heating relay or valve
Y
Cooling relay
G
Fan relay
B
Heating changeover valve or damper control circuit
O
Cooling changeover valve or damper control circuit
P
Heat pump compressor control circuit.