Robertshaw 300-224 Installation And Programming Instructions page 19

WIRING DIAGRAM – 300-227
4 events 4 events
Smart fan OFF
4 min. (on/off)
Unlocked Unlocked
Standard Standard
Single stage Single stage
LED #1 only
LED #2 only
LED1 LED1
300-227
LED2 LED2
RS2 RS2
RS1 RS1
RS+V RS+V
NO NO
COM COM OCC OCC
NC NC
2 events 2 events
1 1
2 2 ON
2 min. (on/off)
3 3
Locked Locked
4 4
5 5 Add-on Add-on
Multistage Multistage
6 6
LED #1 with filter symbol
7 7
8 8 LED #2 with fault symbol
W2 W2
Y2 Y2
W1 W1
Y1 Y1
G G
R R
24V 24V
{
Note 2 24V(c) 24V(c)
O O
B B
Note 1: If jumper is removed, a separate
transformer must be used to power the loads.
Note 2: This thermostat may be used with 24
Volt DC. The negative side of the DC supply
must be wired to the 24V (c) terminal.
Note 1
W2
Y2
W1
Y1
G
O
Reversing Valve
B
Remove connection if
separate transformer used
19
Common
Line
Voltage
24 VAC
Transformer