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PUMP AND SENSOR WIRING FOR VARIOUS APPLICATIONS / MODES
o
Domestic Hot Water Applications With Storage Tank up to 71
C
Refer to
Fig
37.
o
Fig 37: DHW Sensor and Pump Wiring up to 71
C
One 10m NTC sensor cable is supplied with each MVB.
Connect the sensor to terminals 6 and 7 marked 'System Sensor' and fit the sensor into the sensor
well of the storage tank, shown as 'S3'. For most applications this will be the lowest sensor location on
the tank, but may vary depending on specific project design needs. Refer to
Fig
35.
Connect the primary pump shown as 'P1' to the terminals marked R3 / 'Water Heater Pump' located
in the Mains Power and Pump electrical connections junction box at the back of the MVB. Refer to
Fig
34. Use an external contactor if 3 phase pump is used or the pump current exceeds 8A.
70
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