Weil-McLain EGH-105, EGH-125 manual VI Wiring steam, Gravity return

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14

VI Wiring — steam

LADDER WIRING DIAGRAM

EQUIPMENT

SERVICE

120 V.A.C.

(NOTE 7)

gravity return

 

GROUND

SWITCH

 

 

 

 

 

 

R

 

C

Figure 7

 

TRANSFORMER

 

THERMOSTAT

RELAY COIL

 

 

 

1K

 

 

 

G

 

Water boiler wiring —

 

OPERATING CONTROL

 

 

ladder and schematic diagrams

 

 

 

MANUAL RESET

 

 

 

 

1K1

 

MANUAL RESET

 

PROBE LWCO

PRESSURETROL PRESSURETROL FLOAT LWCO

 

Y

 

 

 

 

CABLE

 

 

 

 

TO

 

FUSE

 

 

DAMPER

 

 

 

3

3

 

 

 

 

 

 

5

5

 

 

 

4

4

 

 

 

2

2

 

 

 

6

6

 

 

 

1

1

 

 

 

 

 

2K

 

 

 

SEE NOTE 10

 

ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVERE

 

2K4

 

 

 

A1

A2

 

INJURY OR DEATH. DISCONNECT POWER

 

 

BEFORE INSTALLING AND/OR SERVICING.

 

 

 

 

NOTES:

 

 

N/A

R

 

2K3

 

 

1. ALL WIRING MUST BE INSTALLED IN ACCORDANCE WITH:

 

 

 

 

A. U.S.A. - NATIONAL ELECTRICAL CODE AND ANY OTHER NATIONAL, STATE OR LOCAL

 

2K2

 

 

CODE REQUIREMENTS.

 

1

 

 

B. CANADA - C.S.A. C22.1 CANADIAN ELECTRICAL CODE PART 1 AND ANY OTHER

NATIONAL, PROVINCIAL OR LOCAL CODE REQUIREMENTS.

Part Number 550-110-677/0299

2.ALL CONTACTS SHOWN WITHOUT POWER APPLIED-OFF SHELF CONDITION.

3.IF ORIGINAL WIRE AS SUPPLIED WITH THE APLIANCE MUST BE REPLACED,

o

TYPE 105 C OR IT’S EQUIVALENT MUST BE USED.

4.REFER TO CONTROL COMPONENT INSTRUCTIONS PACKED WITH BOILER FOR APPLICATION INFORMATION.

5.THERMOSTAT - FOR SINGLE ZONE SYSTEMS, THERMOSTAT ANTICIPATOR SETTING IS 0.40 AMPS. FOR MULTIPLE ZONE SYSTEMS USING ZONE VALVES OR CIRCULATORS, REFER

TO COMPONENT MANUFACTURER’S INSTRUCTIONS FOR APPLICATION WIRING AND THERMOSTAT ANTICIPATOR SETTING.

EMCS - FOR EMCS CONNECTION IN PLACE OF THERMOSTAT, REFER TO EMCS INSTALLATION/OPERATING MANUAL.

6.L.W.C.O., PRESSURE CONTROLS, WIRED IN SERIES.

7. DENOTES FIELD INSTALLED CHASSIS GROUND.

8.PILOT LEADWIRES ARE NOT FIELD REPLACEABLE. REPLACE PILOT ASSEMBLY IF NECESSARY.

9.OPERATING CONTROL REQUIRED WITH TANKLESS HEATER.

10. ALARM CONTACT RATINGS: 15 AMP @ 250 VAC.

550-225-027/0199

 

 

 

2K1

LOW VOLTAGE FIELD

 

MV

 

 

 

 

 

 

 

 

 

 

 

HIGH VOLTAGE FIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW VOLTAGE FACTORY

 

MV/PV

 

 

 

 

 

 

 

HIGH VOLTAGE FACTORY

 

PV

 

 

 

IGNITION CABLE

 

 

 

 

ALARM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ALARM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24V

 

 

 

 

 

 

IGNITION CONTROL MODULE TERMINAL.

 

 

 

 

 

 

 

 

 

 

IGNITION CONTROL PANEL TERMINAL.

24V (G)

 

 

 

2

 

 

 

 

 

SENSE

 

 

 

 

 

TRANSFORMER TERMINAL.

 

 

 

 

 

 

 

 

 

 

SPARK

 

 

 

 

 

 

 

 

 

R

IGNITION CONTROL PANEL LAMP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PILOT

SOLENOID

VALVE

TH

TR

D

D

ROBERTSHAW GAS VALVE

SENSOR

IGNITOR

Image 14
Contents Control Supplement Please read this page first Carton guide Boiler cartonsInstallation Gas train assemblyInstall optional vent damper if supplied Vent damper assembliesWater boiler connections III Install boiler controls water boilersII Piping connections Steam boiler connections III Install boiler controls steam boilersIV Optional heaters steam boilers only VI Wiring Gas pipingVI Wiring sequence of operation Call for heatWiring water boilers Water boiler wiringSchematic Wiring Diagram VI Wiring water boilers Control assembly water boilerCSD-1 control panel VI Wiring steam Gravity returnSchematic Wiring Diagram Control assembly steam, gravity return 13aCSD-1 control panel Pumped return Schematic Wiring Diagram Control assembly steam, pumped return Terminal strip VII Final adjustments Before proceeding To place boiler in operationVII Final adjustments operating instructions Operating instructionsViii Check-out procedure operation Viii Check-out procedure leak test Leak test procedureViii Check-out procedure troubleshooting Verify proper operation after servicingReplace pilot assembly TS-2 No Spark System boiler with vent damper does not work Not OK TS-3 Pilot lights Main valve will not come on from previous IX Service and maintenance Replacement parts water boilers Water boiler assemblyWater boiler replacement parts RV20VLReplacement parts steam boilers Steam boiler assemblySteam boiler replacement parts RV20VLWeil-McLain Blaine Street Michigan City,