Wiring — water boilers, Ladder wiring diagram – Weil-McLain EGH-125 User Manual
Page 10
P
art Number 550-110-677/0299
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o
NOTES:
TO COMPONENT MANUFACTURER’S INSTRUCTIONS FOR APPLICATION WIRING AND
FOR MULTIPLE ZONE SYSTEMS USING ZONE VALVES OR CIRCULATORS, REFER
5. THERMOSTAT - FOR SINGLE ZONE SYSTEMS, THERMOSTAT ANTICIPATOR SETTING IS 0.40 AMPS.
4. REFER TO CONTROL COMPONENT INSTRUCTIONS PACKED WITH BOILER FOR APPLICATION
3. IF ORIGINALWIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED,
8. PILOT LEADWIRES ARE NOT FIELD REPLACEABLE. REPLACE
7. DENOTES FIELD INSTALLED CHASSIS GROUND.
9. CIRCULATOR NOT USED WITH GRAVITY HOT WATER.
INSTALLATION/OPERATING MANUAL.
EMCS - FOR EMCS CONNECTION IN PLACE OF THERMOSTAT, REFER TO EMCS
THERMOSTAT ANTICIPATOR SETTING.
TYPE 105 C OR IT’S EQUIVALENT MUST BE USED.
NATIONAL, PROVINCIAL OR LOCAL CODE REQUIREMENTS.
B. CANADA - C.S.A. C22.1 CANADIAN ELECTRICAL CODE PART 1 AND ANY OTHER
A. U.S.A. - NATIONAL ELECTRICAL CODE AND ANY OTHER NATIONAL, STATE OR LOCAL
1. ALL WIRING MUST BE INSTALLED IN ACCORDANCE WITH:
ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVERE
INJURY OR DEATH. DISCONNECT POWER
BEFORE INSTALLING AND/OR SERVICING.
2. ALL CONTACTS SHOWN WITHOUT POWER APPLIED-OFF SHELF CONDITION.
CODE REQUIREMENTS.
INFORMATION.
6. L.W.C.O., HIGH LIMITS, WIRED IN SERIES.
10. ALARM CONTACT RATINGS: 15 AMP @ 250 VAC.
SPARK
24V (G)
SENSE
2
SENSOR
IGNITOR
R
2K
MV/PV
PV
MV
1
1
A
ALARM
24V
ALARM
2K1
GAS VALVE
ROBERTSHAW
D
D+
TR
TH
2K2
2K3
N/A
SEE NOTE 10
2K4
2
A
VALVE
PILOT
TRANSFORMER
FUSE
DAMPER
TO
2
2
1
1
6
6
4
4
5
3
5
3
THERMOSTAT
CABLE
1K1
RESET
HIGH LIMIT
MANUAL
MANUAL
RESET
PROBE LWCO
RELAY COIL
HIGH
LIMIT
1K
LADDER WIRING DIAGRAM
SWITCH
1K2
CIRCULATOR
120 V.A.C.
SERVICE
SOLENOID
PILOT ASSEMBLY IF NECESSARY.
EQUIPMENT
(NOTE 7)
GROUND
Y
R
G
C
IGNITION CONTROL PANEL TERMINAL
TRANSFORMER TERMINAL.
IGNITION CONTROL MODULE TERMINAL.
IGNITION CONTROL PANEL LAMP
HIGH VOLTAGE FIELD
LOW VOLTAGE FACTORY
R
HIGH VOLTAGE FACTORY
IGNITION CABLE
LOW VOLTAGE FIELD
550-225-026/0199
Figure 5
Water boiler wiring —
ladder and schematic diagrams
Wiring — water boilers
VI