Weil-McLain EGH-125, EGH-105 manual Schematic Wiring Diagram

Page 11

Part Number 550

SCHEMATIC WIRING DIAGRAM

-110-677/0299

EQUIPMENT

GROUND (NOTE 7)

		(NOTE 6)
		MANUAL				MANUAL
HIGH		RESET				RESET
LIMIT		HIGH LIMIT			PROBE LWCO
		BK			BK		BK

IMPULSE

RELAY

R

R

Y

MOMENTARY

SWITCH

R R

R

W

G

GR

R

D+

D

TH TR W

ROBERTSHAW GAS VALVE

W

BK

PILOT

SOLENOID

VALVE

BK W R

UNIVERSAL SPARK

IGNITION CONTROL

MV

MV/PV

PV

R

ALARM

R

BK		THERMOSTAT
BK		OR EMCS
		OR EMCS
	BK BK	(NOTE 5)	G
	BK BK

R Y

Y

ALARM

24V

G

	SERVICE	Y	W
	SWITCH	Y	W
	SWITCH	G	G
(BY OTHERS)			G	G
				G
H		C	R
	BK	C	R	BK
	BK	BK		BK
			TRANSFORMER
			120/24 V.A.C.
N				G
N
		W		PLUG-IN
		Y		PLUG-IN
				DPST
W	Y			RELAY
CIRCULATOR		JUNCTION BOX		CABLE
(NOTE 9)				CABLE
(NOTE 9)				TO
				TO
		WIRE NUTS (3)		DAMPER

G

R

1 2 A 1

Y
DAMPER	CONNECTOR

R

TERMINAL

BLOCK

A2

NOTE 10

PRE-WIRED PANEL

24V (GND)

SENSE

SPARK

W O

PILOT

(NOTE 8)

EGH-105 to EGH-125 Control Supplement

CSD-1 control system — Natural gas

11

Image 11

Contents Control Supplement Please read this page first Boiler cartons Carton guideGas train assembly InstallationVent damper assemblies Install optional vent damper if suppliedWater boiler connections III Install boiler controls water boilersII Piping connections Steam boiler connections III Install boiler controls steam boilersIV Optional heaters steam boilers only Gas piping VI WiringCall for heat VI Wiring sequence of operationWater boiler wiring Wiring water boilersSchematic Wiring Diagram Control assembly water boiler VI Wiring water boilersCSD-1 control panel Gravity return VI Wiring steamSchematic Wiring Diagram 13a Control assembly steam, gravity returnCSD-1 control panel Pumped return Schematic Wiring Diagram Control assembly steam, pumped return Terminal strip Before proceeding To place boiler in operation VII Final adjustmentsOperating instructions VII Final adjustments operating instructionsViii Check-out procedure operation Leak test procedure Viii Check-out procedure leak testVerify proper operation after servicing Viii Check-out procedure troubleshootingReplace 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 Water boiler assembly Replacement parts water boilersRV20VL Water boiler replacement partsSteam boiler assembly Replacement parts steam boilersRV20VL Steam boiler replacement partsWeil-McLain Blaine Street Michigan City,