Weil-McLain CIRCULATOR ZONE CONTROLS WMCR-4 User Manual

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Part Number 550-141-857/0107

Instruction manualInstruction manual

Instruction manual

1. Double-sided printed circuit board construction 100% factory tested.

Advanced printed circuitry compatible with most digital programmable

thermostats.

2. Powerful 30 VA transformer — will operate up to 15 zones. (WMCR-2

uses 20 VA transformer.) Electronic fuse on transformer secondary protects

transformer from excessive loading.

3. Control port terminal allows for easy connection of accessory controls (such

as WM-ODR reset control).

4. 5-Second time delay for boiler shutoff.

5. Clearly marked terminals with clamping plates and plenty of room for

wiring.

6. 24 VAC transformer terminals — for easy connection of 3-wire thermostats

and field transformer replacement.

7. Expansion module plug-in — makes adding zone(s) easy and economical.

8. Priority zone indicator — Priority feature will turn

off (light off) temporarily if priority zone calls for heat

longer than 30 minutes, repeating every 30 minutes.

9. Separate X–X (isolated switch) and ZC/ZR relays

protect boiler aquastat — can be used with either “cold

start” or “tankless coil” boiler application. WMCR-2

controller does not have ZC/ZR terminals.

NOTE that terminals ZC/ZR are 120 VAC

connections.

10. Plug-in replaceable relays for long life.

High relay load rating — 1/3 HP.

CSA listed.

11. LED diagnostic lights for easy troubleshooting.

12. Switchable priority improves versatility.

The 4-zone WMCR-4 is featured in this manual. The WMCR-2, WMCR-3 and WMCR-6 Circulator Zone Controllers have identical electrical

specifications. Differences in operating features are noted in this manual.

Note:

WMCR features

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Weil-McLain CIRCULATOR ZONE CONTROLS WMCR-4 Circulator Zone Controls Circulator Zone Control