Weil-McLain 88 manual Install water boiler controls, Install controls

Weil-McLain 88 Water and steam boilers — Series 2 — for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Install water boiler controls

Install controls:
	Figure 37 Water control locations

1. Install furnished controls per Figure 36 and Figure 37.

Failure to properly install, pipe and wire boiler controls can result in severe damage to boiler, building and per- sonnel; and is not covered by boiler warranty.

2.Relief valve must be installed with spindle in vertical position. Use fittings provided with boiler. Do not make any other connection in that piping.

Relief valve discharge line must be piped using rigid material suitable for 375°F, threaded one end, near floor close to drain to eliminate potential of severe burns. Do not pipe to any area where freezing could occur. Do not plug, valve or place any obstruction in discharge line.

3.When installing low water cut-off

a.Must be installed if boiler is located above radiation level.

b.May be required on water boilers by certain state, local or ter- ritorial codes or insurance companies.

c.Install low water cutoff designed for water installations where shown in Figure 36 and Figure 37.

4.If installation is to comply with ASME installation requirements, an additional high temperature limit is needed. Purchase and install in supply line between boiler and isolation valve or in tapping "A."

5.Dual limit control settings:

a Low. – set according to design requirements.

b High. – at least 20° higher than low limit, 240°F maximum.

6.Install optional controls per control manufacturer's instructions.

Figure 36 Water control tappings (see Figure 37)

Location Size Function

A2" High limit Manual reset limit

B2" Water relief valve

	L	1"	Not used — plug
C1	& C2	1"	Alternate low water cut-offs
C1			Combination high and low
			limit control
D1	& D2	1"	Firing rate temperature
			control (when used)
			Low water cut-offs
E1	& E2	½"	—
F1	& F2	C\,"	—
	G	¾"	Combination pressure–temperature gauge
	H	¾"	Boiler drain
	K	1"	Piping to compression tank or automatic air vent
26				Part No. 550-100-068/0308