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WMCR Circulator Zone ControllersWMCR Circulator Zone Controllers
WMCR Circulator Zone ControllersWMCR Circulator Zone Controllers
WMCR Circulator Zone Controllers
8
Part Number 550-141-857/0107
Wiring
There are numerous applications possible for WMCR controls. The
suggested wiring diagrams shown in this manual indicate the proper
terminals for the power supply, load and thermostat for most applications.
Each WMCR-1E (1-zone) or WMCR-4E (4-zone) Expansion module is
supplied with an 18" connector that plugs into a WMCR Circulator Zone
Controller (WMCR-2, -3, -4, -6 control or WMCR-1E Expansion module).
See Figures 13 & 14. Separate line voltage is required.
“Cold start” boiler application
Each zone thermostat will signal the WMCR to operate its zone circulator and start the boiler
(through the X-X or X1-X1 isolated switch). (See Figures 10 and 11 for suggested wiring.)
Jumper
To be placed between terminals ZC and ZR. (Jumper is factory-installed in this position.) When
priority switch is not ON, all zones operate independently of each other. Terminals ZC/ZR are
120 VAC connections.
Connect isolated switch (terminals X–X or X1–X1) to boiler thermostat connection (see boiler
manual).
Priority
Circulators for zones 2 and higher will not operate when zone 1 (priority) circulator is actuated.
(Priority switch is ON.)
Figure 7
“Cold start” application
(No tankless coil in boiler)
WMCR-4 shown — also
applies to WMCR-3 and -6
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