Electrical Wiring - UTICA BOILERS STARFIRE 3 STEAM Installation Manual And Operating Instructions

Electrical wiring must conform with the latest revisions of the National Electrical Code,
ANSI/NFPA No. 70, and/or local authority having jurisdiction.
1. When an external electrical source is utilized, the boiler, when installed, MUST BE
electrically grounded in accordance with these requirements.
2. Install a fused disconnect switch between boiler and meter at a convenient location.
3. When the boiler is equipped with self-energized controls, no outside source of electric
power shall be connected to the circuit of this system. See figure 12 below.
1. COMPONENT CODING
TH-1 Thermostat (millivolt)
TH-2 Thermostat (24 Volt)
TH-3 Thermostat (Line Voltage)
TR-1 Transformer (120V/24V 40VA)
TR-2 Transformer (120V/24V 50VA)
LGV 24 Volt Gas Valve
PS Pressure Switch
MR-PS Manual Reset Pressure Sw.
Control Terminal
1K Relay Coil
2. WIRING CODE
LINE VOLTAGE BY FACTORY
LOW VOLTAGE BY FACTORY
LINE VOLTAGE BY INSTALLER
LOW VOLTAGE BY INSTALLER
* NOT ALL COMPONENTS LISTED ARE USED IN ALL CONTROL SYSTEMS.
SFH-STEAM WIRING W/MM #67 MECHANICAL LWCO

ELECTRICAL WIRING

ELECTRICAL WIRING ELECTRICAL WIRING
ELECTRICAL WIRING ELECTRICAL WIRING
FIGURE 12
PAGE 10
1K1 Relay Contacts
1K2 Relay Contacts
LS Limit Switch
MS Manual Switch
CIR Circulator
ECO Energy Cut-Off
PSC Pilot Safety Coil
Wire Connection
LWCO Low Water Cut Off
EWF Electric Water Feeder
PG Power Generator