Loading ...
Loading ...
Loading ...
WMCR Circulator Zone ControllersWMCR Circulator Zone Controllers
WMCR Circulator Zone ControllersWMCR Circulator Zone Controllers
WMCR Circulator Zone Controllers
4
Part Number 550-141-857/0107
WMCR Circulator Zone Controllers
1. The WMCR series of zone controllers are controlled by low voltage thermostats or any
other low voltage controllers having an SPST switching action. The controls provide
intermediate switching to permit one, two, three or up to fifteen separate line voltage loads
(circulators).
2. Advanced circuit design will operate with most digital/programmable thermostats.
3. The isolated end switch relay (terminals X–X) has a full 10 amp contact rating.
Sequence of operation
When a zone calls for heat (circuit is closed):
1. Isolated switch relay contact closes.
2. Zone light comes on.
3. X–X switch is closed. (X1–X1 and X2–X2 switches closed on WMCR-2.)
4. X–X indicator light turns on.
5. Controller relay closed. A ZC-to-ZR connection is required, either by factory-installed
jumper or through boiler aquastat. (WMCR-2 does not include ZC/ZR relay or
terminals.) Terminals ZC/ZR are 120 VAC connections.
6. ZC/ZR indicator light turns on. (WMCR-2 does not have ZC/ZR light.)
7. Zone circulator will start.
If Priority switch is in ON position:
1. Zone 1 becomes priority zone.
2. When zone 1 calls for heat, priority zone is activated and all other zones are deactivated
(Circulators for zones 2 and higher and any zone modules will not operate). Priority
On light turns on.
3. If priority zone calls for heat longer than 30 minutes, the priority feature is temporarily
disabled, Priority On light turns off, and other zones are activated (if calling for heat).
After 30 minutes, the priority feature is automatically enabled again.
Electrical specifications
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.
Weil-McLain
model
number
Zones Transformer
voltage
Relay
switching
action
Thermostat
current
(amps)
Single phase
motor rating
(each circuit)
120 VAC 240 VAC
WMCR-2 2 120V, 60 HZ, 20VA SPST 0.085 ¹⁄₃ HP ¹⁄₂ HP
WMCR-3 3 120V, 60 HZ, 30VA SPST 0.085 ¹⁄₃ HP ¹⁄₂ HP
WMCR-4 4 120V, 60 HZ, 30VA SPST 0.085 ¹⁄₃ HP ¹⁄₂ HP
WMCR-6 6 120V, 60 HZ, 30VA SPST 0.085 ¹⁄₃ HP ¹⁄₂ HP
Loading ...
Loading ...
Loading ...