Weil-McLain EGH-105, EGH-125 manual Control assembly steam, pumped return

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VI Wiring — steam

pumped return

10

Figure 10

Control assembly — steam, pumped return

When using a tankless heater, knockout the opening in the inner panel. Locate the controls to allow room for the tankless heater piping. The tankless heater temperature control (not shown) installs in the heater tapping.

7

19

20

18

21

22

23 24

MV
MV/PV
PV
ALARM			9
ALARM		2
24
V
	(GND)
V	(GND)
24
SENSE
SPARK

3

1

		8
25	4	25
	4

6	5	15	15
		15	12


		11

Part Number 550-110-677/0299

Install strain relief bushings wherever electrical wiring passes through jacket.

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	16	13
	16	27
		27
		13a
		14

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Vent connections — Connect with ¼" tubing and run vent line outside building per code requirements.

677-01-p

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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,