10
COMPONENT CODING
TH-1
Thermostat (Millivolt)
MR-PS Manual Reset Pressure Switch
CIR
Circulator
TH-2
Thermostat (24 Volt)
Control Terminal
ECO
Energy Cut-Off
TH-3
Thermostat (Line Voltage)
1K
Relay Coil
PSC
Pilot Safety Coil
TR-1
Transformer (120V/24V/40VA)
1K1
Relay Contacts
Wire Connection
TR-2
Transformer (120V/24V/50VA)
1K2
Relay Contacts
LWCO
Low Water Cut Off
LGV24
Volt Gas Valve
LS
Limit Switch
EWF
Electric Water Feeder
PS
Pressure Switch
MS
Manual Switch
PG
Power Generator
STEAM WIRING W/BECKETT BURNER
NOTE:
Not all components listed are used in all control systems.
WIRING CODE
Line Voltage By Factory
Low Voltage By Factory
Line Voltage By Installer
Low Voltage By Installer