120 VAC
Circuit ON
Weil-McLain
Michigan City, IN
WMR-21
Switching Relay
T
L2 L1 3
4
5
6
R
C
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
O
N
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
R
C
24V
T
W
85902