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WMCR Circulator Zone ControllersWMCR Circulator Zone Controllers
WMCR Circulator Zone ControllersWMCR Circulator Zone Controllers
WMCR Circulator Zone Controllers
10
Part Number 550-141-857/0107
Figure 9
Tankless coil boiler —
WMCR-4 to L8124A or C
aquastat/relay
Note 9:
The L8124A or C can be used for
an additional zone, responding to
the thermostat connected to the
L8124A or C T–T terminals.
Connect the zone circulator to the
C1/C2 terminals as shown. This
zone would not be overriden by the
WMCR priority switch.
If the boiler is installed in a primary/
secondary piping system, do not
wire per Figure 9. Use Figure 10
or 11.
Figure 10
Tankless coil boiler
WMCR-4 to L8124E
Note 10:
Terminals C1 and C2 are not used
except to operate a boiler loop
pump on a primary/secondary
piping system. The pump will
operate when any zone calls for
heat.
Electrical shock hazard —
Disconnect power before installing
or servicing. Can cause severe
personal injury, death or substantial
property damage if ignored.
All wiring must be installed in accordance with:
U.S.A. — National Electrical Code and any other
national, state or local code requirements. Wiring must
be N.E.C. Class 1.
Canada — C.S.A. C22.1 Canadian Electrical Code Part
1 and any other national, provincial or local code
requirements. Wiring must be C.S.A. C22.1 C.E.C.
Part 1.
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