SECTION 12: CONTROL M ETHODS
43
FIGURE 26: One Zone Operation without Control Panel
1
2
3
4
5
6
COIL COIL
R
C
W
G
Y
Thermostat
Pump
Motor
Pressure
Switch
(Pump)
SPST (12A)
Transformer
Relay
Zone 1
Burners
NL
LN
Nine Burners Maximum
Black
White
Red
Black
L
120 V
1 Ø
60 Hz
N
Ground
Description Part Number
SPST Transformer Relay 90417600
