67
Power for up to 3 pumps
– DHW Pump, Water Heater Pump and System Pump - can be supplied from
the MVB.
The maximum current draw will depend on the number of pumps used, the size of pumps employed
and the manner in which they are connected, ie directly powered by the MVB for single phase pumps
up to 8A each or indirectly powered via a contactor for 3 phase pumps or single phase pumps exceeding
8A each. Refer to
on page 67 for pump electrical requirements.
Note:
whilst the MVB can control the System Pump in hydronic applications, this will only be on an
on/off basis and not variable speed control.
MVB
Model
Applications up to 71
o
C
Applications >71
o
C
Water Heater
Pump Model
Electrical
Requirements
Water Heater
Pump Model
Electrical
Requirements
910500
UPS 32-80
220W / 0.98A
UPS 32-80
220W / 0.98A
910750
UPS 32-80
220W / 0.98A
Magna 1 40-120
463W / 2.05A
911000
Magna 1 40-120
463W / 2.05A
Magna 1 40-120
463W / 2.05A
911250
Magna 1 40-120
463W / 2.05A
Magna 1 40-120
463W / 2.05A
911500
Magna 1 40-120
463W / 2.05A
Magna 1 65-150
1263W / 5.53A
911750
Magna 1 65-150
1263W / 5.53A
Magna 1 65-150
1263W / 5.53A
912000
Magna 1 65-150
1263W / 5.53A
Magna 1 65-150
1263W / 5.53A
Table 19: Pump Electrical Requirements
PUMP CONNECTIONS
Connect pumps to the terminals marked R1, R2, R3 as appropriate:
R1 = Water Heater (Boiler) Pump
– Primary pump for W models directly connected to a storage tank in
DHW applications and primary pump for all H model applications.
R2 = DHW Pump
– Indirect DHW pump for H models where an indirect DHW system is connected.
R3 = System Pump (optional) - H models for controlling the flow of water in the system (refer to System
Modes). Optional for W models for controlling the building return pump (operates only on a tank call for
heat).
Refer to
commencing on page 52 for description of pumps and their use.
Fig 34: Mains Power and Pump Wiring Connections
FIELD
WIRING
FACTORY
WIRING
