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Part number 550-141-858/0107
3
Instruction manual
WMZV features
The printed circuit design of these controllers eliminates most field wiring
needed for zone valves, making their installation easier and quicker.
Built-in priority zone means no other controllers are needed to provide
priority heating for indirect water heaters including Weil-McLain Plus
Indirect-Fired Water Heaters.
1. Double-sided printed circuit
board construction is 100%
factory tested.
2. Clearly marked terminals with
quick-connect screwless clamps.
3. Plug-in replacement priority
relay.
4. LED diagnostic lights for easy
troubleshooting.
5. Will operate four or six 24-volt
(powered open, or powered
closed) zone valves including:
Taco, Superior, Erie,
Honeywell, B&G, SPARCO
and most other motorized and
heat motor type valves.
6. Switchable priority improves
versatility.
7. Plug-in replaceable isolated-
contact relay.
8. 24 VAC constant power for
5-wire zone valves (such as
Honeywell VC Series 40 and 80
valves).
9. Isolated end switch terminals,
X–X.
10. Powerful transformer (40 VA on
WMZV-4, 75 VA on WMZV-
6).
11. Galvanized steel enclosure with
enamel-painted cover.
Specifications
Weil-McLain
model
number
Number
of zones
(see Note)
Transformer
output at
24 VAC
End switch
contact rating
Enclosure
dimensions
(L x H x D)
WMZV-4 3 + 1 40 VA 1/3 HP @ 120 VAC 9" x 7" x 2¾"
WMZV-6 5 + 1 75 VA 1/3 HP @ 120 VAC 11¼" x 7" x 2¾"
Note: Check zone valve specifications for required VA per valve.
Do not use digital thermostats unless recommended by zone valve manufacturer.
Thermostat current set from zone valve manufacturer.
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