14
* NOT ALL COMPONENTS LISTED ARE USED IN ALL CON
-
TROL SYSTEMS.
NOTES:
* Switches are shown in position during the heating
cycle.
* If any of the original wiring supplied with the boiler
is replaced it must be replaced with like wire size and
type of insulation or equivalent.
ELECTRICAL WIRING
Electrical wiring must conform with the latest revision of the
National Electrical Code, ANSI / NFPA No. 70 and/or local
authority having jurisdiction.
When an external electrical source is utilized, the boiler,
1.
when installed, MUST BE electrically grounded in accor
-
dance with these requirements.
Install a fused disconnect switch between boiler and me
-
2.
ter at a convenient location.
Hot water control and intermittent ignition wiring for boilers
with fail safe relay. See figure #12.
WIRING CODE KEy
LINE VOLTAGE BY FACTORY
LOW VOLTAGE BY FACTORY
LINE VOLTAGE BY INSTALLER
LOW VOLTAGE BY INSTALLER
COMPONENT KEy
CODING
Thermostat (millivolt)
TH-1
Thermostat (24 Volt)
TH-2
Thermostat (Line Voltage)
TH-3
Transformer (120V/24V 40VA)
TR-1
Transformer (120V/24V 50VA)
TR-2
24 Volt Gas Valve
LGV
24 Volt Gas Valve
LGV-1
Pressure Switch
PS
Manual Reset Pressure Sw.
MR-PS
Control Terminal
Relay Coil
1K
Relay Contacts
1K1
Relay Contacts
1K2
Limit Switch
LS
Manual Switch
MS
Circulator
CIR
Energy Cut-Off
ECO
Pilot Safety Coil
PSC
Wire Connection
Low Water Cut Off
LWCO
Electric Water Feeder
EWF
Power Generator
PG
Roll-Out Switch
RSW
COMPONENT AND WIRE CODING KEYS
The keys that follow pertain to the
HOT WATER CON-
TROL AND INTERMITTENT IGNITION WIRING
diagrams.