IMPPUMPS NMT32-120 Manual De Instalación Y Operación página 37

TWIN PUMP OPERATION
Twin pumps have double hydraulic housing with integrated check valve, which automaticly turns based on flow, and
two separated motors.
NMT(D) MAX pumps do not have a control logic that ensures the continuous operation of at least one pump - the
control logic must be carried out by the customer / user himself. It is recommended that the control logic exchanges
pumps for operation with time interval of ≤ 24 h.
NMT(D) MAX C Pumps can operate in several different modes, switching betweend the pumps is done by the
communications module:
- Alternating operation [default setting] – One pump is operating while the other one is on standby. Pumps
switch their role every 24 hours or when an error occurs on one pump.
- Backup operation – One pump operates constantly and the other one is on standby. If an error occurs on
the operating pump the one on standby will automaticly start working. This mode can be set up by turning
off the pump that we wish to be on standby. That is done by holding the
- Parallel operation – Both pumps work at the same time with the same settings of constant pressure. This
mode is used when greater flow than one single pump can output is needed. When the first pump hits its
flow limit the second one turns on and compliments the first to reach desired flow. This mode is activated
when we set both pumps to constant pressure mode. Night mode is not recommended in this mode of
operation.
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button for 5 seconds.