Weil-McLain EGH-125 III Install boiler controls - steam boilers, Application, W-MPart No, Tapping

CSD-1 control system — Natural gas

III Install boiler controls — steam boilers

All water level controls must mount on the left end of the boiler. Failure to do so could result in nuisance shutdowns and possible lockout on the manual reset control due to water level variations from end to end. Substantial property damage could result from freezing due to loss of heat.

All controls must mount on left end of the boiler. The correct tappings are available only on the left end section.

Install steam trim components as required by CSD-1, latest edition. See Figure 4 and Table 3.

See also Figure 8 or Figure 10 for finished assembly.

•CSD-1 requires two low water cutoffs (one manual reset) and two limit controls (one manual reset) as shown in the illustration.

•For float type (automatic reset only) low water cutoffs other than those shown in this Supplement, refer to EGH Manual for mounting and piping instructions.

					Install a blowdown valve on any float type low water cutoff as described in
					the EGH Manual, Section III.
			Plug all unused tappings.
			All piping and control connections must also comply with the EGH Manual.
	IV Optional heaters — steam boilers only
			Install optional tankless heater, if used, (steam boiler only) per EGH Manual Section IV.
Figure 4					Table 3
Steam boiler connections					Steam boiler connections
11¾"		275/8"			Tapping	Application	W-M Part No.
	163/16"				T	McDonnell & Miller PS852M-24 M/R	511-114-530
						probe LWCO
	E	G	Supply		C	Not used — plug tapping	—
			risers		D	Drain connection (per EGH manual)	—
			L		E	ASME relief valve (per EGH manual)	—
			S		G	Not used - plug tapping	—
32¾"	C				H	Float LWCO, automatic reset —	—
2313/16 "	T		H	V		Gravity return — McD-M 67W-1	511-114-494
(Water line)						Pumped return — McD-M 42-A	511-114-531
			D			Pressure gauge	510-218-045
				165/8"	L	Pressure limit, automatic reset	510-312-135
13½"
			Return			Honeywell L404C-1147 M/R limit	510-312-060
					S	Skim tapping (per EGH manual)	510-312-209
211/16"					V	Gas supply connection (right or left)	—
		24"				Plug all tappings not used.
				677-07
Part Number 550-110-677/0299							7