Robertshaw 300-224 Installation And Programming Instructions page 20

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