Off on – Robertshaw Deluxe Programmable User Manual
Page 20
OUTPUT TERMINAL FUNCTIONS – 300-227
20
W2.............Energizes auxiliary heat as second stage emergency
heat
Y2..............Energizes compressor #2 on a call for second stage
heating or cooling
W1.............Energizes auxiliary heat as last stage heating or first
stage emergency heat
Y1..............Energizes compressor #1 on a call for first stage heat-
ing or cooling
G ...............Fan is energized with a call for heating or cooling or by
pressing the FAN button
R................Independent switching voltage*
24V ............24 VAC hot from the equipment transformer
24V(c)........24 VAC common from the equipment transformer
LED1 .........Free lights for status
LED2
or function indication
RS2 ...........Use to connect outdoor temperature sensor
RS1
and/or indoor remote sensor options. Refer
RS+V
to the instructions included with the sensors.
O ...............Energizes the reversing continuously in the cooling
mode
B................Energizes the reversing continuously in the heating and
off modes
NO.............Relay coil is deenergized in the night
COM
event. In all other events, the relay coil is
NC
energized.
* Allows for DC operation required on some older Lennox and
McQuay units.
To replace a dual transformer system, connect the hot lead of the
higher rated transformer (T1) to the 24V terminal. Connect the
common to the 24V(C). Connect the common of the second trans-
former to the common lead of the T1 and tape off or wire nut the
hot lead of T2.
4 events
2 events
Unlocked
Locked
Standard
Add-on
Single stage
Multistage
4 events
2 events
Unlocked
Locked
Standard
Add-on
Single stage
Multistage
1
2
3
4
5
6
7
8
W2
Y2
W1
Y1
G
R
24V
24V(c)
O
B
LED1
LED2
RS2
RS1
RS+V
NO
COM OCC
NC
Smart fan OFF
ON
4 min. (on/off)
2 min. (on/off)
LED #1 only
LED #1 with filter symbol
LED #2 only
1
2
3
4
5
6
7
8
300-227
W2
Y2
W1
Y1
G
R
24V
24V(c)
O
B
LED1
LED2
RS2
RS1
RS+V
NO
COM OCC
NC
LED #2 with fault symbol
4 events
2 events
Unlocked
Locked
Standard
Add-on
Single stage
Multistage
4 events
2 events
Unlocked
Locked
Standard
Add-on
Single stage
Multistage
1
2
3
4
5
6
7
8
W
1
Smart fan OFF
ON
4 min. (on/off)
2 min. (on/off)
LED #1 only
LED #1 with filter symbol
LED #2 only
1
2
3
4
5
6
7
8
W
1
LED #2 with fault symbol
OFF ON