Figure 8: Hydraulic Module Equipped With Variable Speed Single Pump Low Available Pressure - Riello NXHP Series Installation, Operation And Maintenance Instructions

2 - INSTALLATION OF UNIT

Figure 8: Hydraulic module equipped with variable speed single pump low available pressure

Legend:
B
Automatic air vent valve
C
Flow switch
D Safety valve outlet
E
Leaving water temperature probe
F
Circulation pump
G
Plug to unblock the seizing pump
H
Entering water temperature probe
Minimum and maximum pressures necessary in the hydraulic circuit for correct operation of the units.
Hydraulic circuit
Variable speed hydraulic module
26
F
Minimum pressure at the suction of the pump
to avoid the cavitation phenomena.
110 kPa (1,1 bar)
C B
E
G
D
H
Maximum pressure at the suction of the pump
before the opening of the water relief valve
300 kPa (3 bar).
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