Installation – Lennox International Inc. 43558 User Manual
Page 8
14
14
INSTALLATION
TABLE A – TERMINAL DESCRIPTIONS (continued)
TERMINAL
FUNCTION
FUNCTION
LABELS
(HEAT PUMP MODE)
(MULTI-STAGE MODE)
COMMENTS
E
Emergency heating
DO NOT CONNECT
Activates Emergency heating ONLY when the System Switch is in
Emergency (em) Mode. (Ignored on Multi-stage systems)
O
Reversing valve
Cooling damper
Activates reversing valve or damper in COOL mode.
(cooling mode)
ALWAYS ON in COOL MODE.
B
Reversing valve
Heating damper
Activates reversing valve or damper in HEAT mode.
(heating mode)
ALWAYS ON in HEAT MODE.
G
Fan
Fan
Activates the system Fan. (Can be Auto, On, or Program controlled)
L
System monitor
System monitor
Activates System Check LED on the front of thermostat.
(Controlled by the system, not the thermostat.)
C
24VAC common
24VAC common
Common wire of 24VAC transformer. REQUIRED for thermostat operation.
RS1+
Remote temperature
Remote temperature
Positive (+) Terminal for Remote Sensor #1. Polarity MUST be maintained.
sensor 1
sensor 1
RS1-
Remote sensor 1 (common)
Remote sensor 1 (common)
Negative (-) Terminal for Remote Sensor #1. Polarity MUST be maintained.
RS2+
Remote temperature
Remote temperature
Positive (+) Terminal for Remote Sensor #2. Polarity MUST be maintained.
sensor 2
sensor 2
RS2-
Remote sensor 2 (common)
Remote sensor 2 (common)
Negative (-) Terminal for Remote Sensor #2. Polarity MUST be maintained.
OPTIONAL
41653_model43558.pmd
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15
TABLE B
HEAT PUMP CROSS-REFERENCE CHART
NOTE:
If your heat pump thermostat does not have an E wire, use the provided jumper wire to connect the E terminal to
the W2 terminal, as shown in three examples above. Refer to the Wiring Diagrams on pages 58-59.
EXAMPLES OF DIFFERENT SYSTEM TERMINALS
CLIMATE
TECHNOLOGY
BRYANT,
RHEEM-
TRANE,
TERMINALS
CARRIER
COLEMAN
COMFORTMAKER
PAYNE
RUUD
WEATHERTRON
YORK
LENNOX (1)
LENNOX (2)
R
R
R
R
R
R
R
R
R
V-VR
Y1
Y or Y1
Y
Y
Y
Y
Y
Y
Y
M
W2
W2
W2
W1
W2
W2
W
W
W1
Y
E
E
E
jumper
E
E
X2
jumper
E
E
to W2
to W2
O
O
O
O
O
O
O
R
B
B
B
G
G
G
G
G
G
G
G
G
F
L
L or F
L
L or X
L
L
X
L
C
C
X
C, X, X1
C, C1, X1
X
B
B
C
X
Note: W2 wires
Note:
no connection
T wire no
connection