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SECTION 12: CONTROL M ETHODS
45
FIGURE 28: Two Zone Operation without Control Panel
1
2
3
4
5
6
COIL
COIL
R
C
W
G
Y
1
2
3
4
5
6
COIL
COIL
R
C
W
G
Y
Pump
Motor
Pressure
Switch
(Pump)
Transformer
Relay
Zone 1
Burners
Zone 2
Burners
NL
LNLN
Nine Burners Total
Maximum Between Zones
DPST (12 A)
Transformer
Relay
Zone 1
Thermostat
Zone 2
Thermostat
Purple Red
Red
Black
Black Black
Black
Red/Yellow
Red/YellowWhite
White
DPST (12 A)
L
120 V
1 Ø
60 Hz
N
Purple
Description Part Number
DPST Transformer Relay 90436300