Robertshaw 300-224 Installation And Programming Instructions page 16

OUTPUT TERMINAL FUNCTIONS -
300-225
Era
RS2
'
UZI
RS,
UZI
RS.V
OFF ON
4 events
Smart fan OFF
4 min. (on/cff)
Unlocked
Electric
W1 ....
Y1 ....
G .....
24V
."
1011
24V(c)
Y,12111
1011
„,
24,1011
RS2 ..
lizEi
2411(c,
RS1
RS+V
• Mows for DC operation required on some older
Lennox and Mcaray units.
2 events
To replace a dual transformer system, connect the hot
ON
lead of the higher rated transformer (T1) to the 24V ter-
2 min. (on/off)
minal. Connect the common to the 24V(C). Connect the
common of the second transformer to the common lead
Locked
of the Ti and tape off or wire nut the hot lead of 72.
Gas
300-225
Energizes on a call for first stage heat
Energizes with a call for coaling
Fan is energized with a call for heating or
selected by pressing the FAN button
.... Independent switching voltage'
24 VAC hot from the equipment transformer
.... 24 VAC common from the equipment
transformer
Use to connect outdoor temperature
sensor and/or indoor remote sensor
options. Refer to the instructions included
with the sensors.
16