Weil-McLain WMR-22 User manual

Weil-McLain
Brand
Weil-McLain
Model
WMR-22
Category
Electrical relays
Type
User manual

This manual is also suitable for

120 VAC
Circuit ON
Weil-McLain
Michigan City, IN
WMR-21
Switching Relay
T
L2 L1
3
4
5
6
RC
24V
T
W
Made in U.S.A.
Part Number 550-141-859/0799
Zone
Controller
This manual must only be used by a qualified heating installer/service
technician. Failure to comply could result in severe personal injury, death
or substantial property damage.
Instruction manual
• WMR-21 DPST (Double-pole/single throw)
• WMR-22 DPDT (Double-pole/double throw)
120 VAC
Circuit ON
Weil-McLain
Michigan City, IN
Switching Relay
Made in U.S.A.
WMR-22
T
L2 L1
3
5
4
6
NO
NO
NC
NC
4
6
RC
24V
T
W
85902
2
Part Number 550-141-859/0799
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
Replacement parts
Hazard definitions
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.
To the installer
Specifications
Weil-McLain
model
number
Transformer
voltage
Switching
action
Thermostat
current
amps
Single-phase motor
rating
120 VAC 240 VAC
WMR-21 120 V 60 HZ
15 VA
DPST .18 10 A,
¹⁄₃ HP
10 A,
¹⁄₂ HP
WMR-22 120 V 60 HZ
15 VA
DPDT .18 10 A,
¹⁄₃ HP
10 A,
¹⁄₂ HP
Part description Weil-McLain part number
Plug-in relay (24 VAC coil) 510-311-021
Part Number 550-141-859/0799
3
WMR-21 — Double pole/single throw switching relay
WMR-22 — Double pole/double throw switching relay
WMR-22 cross reference table
WMR-21 cross reference table
120 VAC
Circuit ON
Weil-McLain
Michigan City, IN
WMR-21
Switching Relay
T
L2 L1
3
4
5
6
RC
24V
T
W
Made in U.S.A.
120 VAC
Circuit ON
Weil-McLain
Michigan City, IN
Switching Relay
Made in U.S.A.
WMR-22
T
L2 L1
3
5
4
6
NO
NO
NC
NC
4
6
RC
24V
T
W
85902
24 VAC
Jumper
L2 L1
T/R
46
3
C
5
T/W
120 VAC
Relay coil
85903
120 VAC field wiring
120 VAC ground lead
120 VAC factory wiring
24 VAC field wiring
24 VAC factory wiring
24 VAC
Jumper
L2 L1
T/R
NO NC NO NC
C
T/W
120 VAC
85904
4646
3
5
Relay coil
120 VAC field wiring
120 VAC ground lead
120 VAC factory wiring
24 VAC field wiring
24 VAC factory wiring
Weil-
McLain
Argo Honeywell Taco White-
Rodgers
WMR-21 AR821 RA 89A SR501 809A-189
WMR-21 AR821 RA 832A SR501 829A-832
WMR-21 AR821 R 845A SR501 829A-845
Weil-McLain Argo Taco
WMR-22 AR822 SR501
4
Part Number 550-141-859/0799
Electrical shock hazard —
Disconnect power before
installing or servicing. Can
cause severe personal injury,
death or substantial property
damage if ignored.
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.
WMR-21 — Typical application
Add circulator to L8124A or C
aquastat/relay
WMR-21 and WMR-22
General wiring
85907
24 VAC
120 VAC
C
C
L2
L2
L1
L1
3
3
4
4
5
5
6
6
T
R
T
R
T
W
T
W
Thermostat or
isolated contact
to activate relay
L8124A or C
Aquastat/relay
Circulator 1
Circulator 2
To burner control
24 vac to 3-wire
thermostat
WMR-21
120 VAC
120 VAC
Hot
Neutral
Hot
Neutral
T
T
ZR
ZC
B1
B2
C1
C2
1
2
Ground
Ground
screw
85905
24 VAC
120 VAC
C
C
L2
L2
L1
L1
4
4
5
5
6
6
Thermostat or
isolated contact
to activate relay
Normally open
contact out
Normally open
contact out
Remove factory-
installed jumper from
L1 to 3 to use 3–4
as isolated contacts.
24 vac to 3-wire
thermostat
WMR-21
120 VAC
Hot
Neutral
Ground
Ground
screw
3
3
85906
24 VAC
120 VAC
C
C
5
5
6
NO
6
NO
4
NO
4
NO
6
NC
6
NC
4
NC
4
NC
L2
L2
L1
L1
3
3
T
R
T
R
T
W
T
W
Common
Thermostat or
isolated contact
to activate relay
Remove factory-
installed jumper from
L1 to 3 to use 3/4/4
as isolated contacts.
Common
24 vac to 3-wire
thermostat
Normally open
Normally open
Normally closed
Normally closed
120 VAC
Hot
Neutral
WMR-22
Ground
Ground
screw
120 VAC field wiring
120 VAC factory wiring
120 VAC ground lead24 VAC field wiring
24 VAC factory wiring
Legend
T
R
T
R
T
W
T
W
  • Page 1 1
  • Page 2 2
  • Page 3 3
  • Page 4 4

Weil-McLain WMR-22 User manual

Weil-McLain
Brand
Weil-McLain
Model
WMR-22
Category
Electrical relays
Type
User manual
This manual is also suitable for
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