Weil-McLain WMR-21, WMR-22 instruction manual WMRSwitchingRelays

WMRSwitchingRelays

Contents Hazard definitions and “To the installer”	2
Specifications and replacement parts	2
WMR-21 layout, schematic diagram and cross reference table	3
WMR-22 layout, schematic diagram and cross reference table	3
WMR-21 and WMR-22 General wiring	4
WMR-21 Typical application wiring	4

Hazard definitions

To the installer

Indicates presence of hazards that will cause severe personal injury, death or substantial property damage.

Indicates presence of hazards that can cause severe personal injury, death or substantial property damage.

Indicates presence of hazards that will or can cause minor personal injury or property damage.

Indicates special instructions on installation, operation or maintenance that are important but not related to personal injury or property damage.

Electrical shock hazard — Disconnect power before installing or servicing. Can cause severe personal injury, death or substantial property damage if ignored.

To avoid severe personal injury, death or substantial property damage, never connect the load terminals to a load that takes more current than the amount listed for the relay in the electrical ratings.

Use copper wire only. Use of any other type of wire could cause a fire hazard resulting in severe personal injury, death or substantial property damage.

All wiring must be installed in accordance with:

U.S.A. — National Electrical Code and any other national, state or local code requirements. Wiring must be N.E.C. Class 1.

Canada — C.S.A. C22.1 Canadian Electrical Code Part 1 and any other national, provincial or local code requirements. Wiring must be C.S.A. C22.1 C.E.C. Part 1.

Specifications
	Weil-McLain	Transformer	Switching	Thermostat	Single-phase motor
	model	voltage	action	current		rating
	number			amps
					120 VAC		240 VAC
	WMR-21	120 V 60 HZ	DPST	.18	10 A,		10 A,
		15 VA			¹⁄₃ HP		¹⁄₂ HP
	WMR-22	120 V 60 HZ	DPDT	.18	10 A,		10 A,
		15 VA			¹⁄₃ HP		¹⁄₂ HP
Replacement parts
	Part description				Weil-McLain part number
	Plug-in relay (24 VAC coil)				510-311-021

2 Part Number 550-141-859/0799