Raypak 910500, Руководство пользователя и инструкции по установке

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72
Hydronic Heating Applications
Mode 1
– Hydronic Heating Only
Refer to Fig 40.
Fig 40: Mode 1 Sensor and Pump Wiring
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 a sensor well
in the main heating flow and return piping downstream of where the water heater primary flow joins the
main heating flow and return piping, shown as ‘S3’. Refer to
Fig 35 .
Refer to Wiring the Outdoor Sensor on page 76
if an outdoor sensor is used, shown as ‘S4’.
Connect the water heater pump
shown as ‘P1’ to the terminals marked R1 / ‘Water Heater Pump’
located in the Mains Power and Pump 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.
Optionally connect the system pump
shown as ‘P2’ to the terminals marked R3 / ‘System Pump’
located in the Mains Power and Pump 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.