Weil-McLain EGH-105, EGH-125 II Piping connections, III Install boiler controls water boilers

EGH-105 to EGH-125 Control Supplement

II Piping connections

Connect steam (water) piping to the boiler per EGH Manual Section II.

Water boilers — make provision for mounting probe low water cutoff in the supply or return piping, above the top of the boiler. The low water cutoff must be between the boiler and any isolation valve(s).

III Install boiler controls — water boilers

				The controls may be mounted on either end of the boiler. Mount all controls
				on the same end. The junction box (electrical entrance) must also be mounted
				on the same end as the controls.
				Install the probe low water cutoff in the supply or return piping, above the
				top of the boiler. The low water cutoff must be mounted between the boiler
				and any isolation valve(s) installed in the piping.
			Install water trim components as required by ASME CSD-1, latest edition. See Figure 3 and
			Table 2 for controls required and tapping usage. See Figure 6 for finished assembly.
			Plug all unused tappings.
			All piping and control connections must also comply with the EGH Manual.
Figure 3				Table 2
Water boiler connections				Water boiler connections
	11¾"	275/8"		Tapping	Application	W-M Part No.
	163/16"
				D	Boiler drain connection	—
	E	G	Supply	E	ASME relief valve (per EGH manual)	—
			L	G	Pipe to air vent or compression tank	—
			S	H	Honeywell L4006E-1000 M/R limit	510-312-041
32¾"	Not		H	L	Pressure/temperature gauge	510-218-097
	used
				V
				S	Temperature limit control, auto reset	510-312-209
		D		V	Gas supply connection (right or left)	—
	13½"			165/8"
		Return			McDonnell & Miller PS852M-24 M/R
				Not shown	probe LWCO (Mount in supply or	511-114-530
					return piping, above top of boiler)
211/16"		24"			Plug all tappings not used.
				677-08

6 Part Number 550-110-677/0299