MAXA i-MAX 0466 - Operation Under Thermoregulator Call (Default); Operation Under Thermoregulator Call With Periodic Activation; Operation With Active Electric Heater; Continuous Operation

i-MAX Industrial inverter air/water heat pump with axial fans
12
7.2.1 OPERATION UNDER THERMOREGULATOR CALL (Default)
During this operating mode (P03=1), the thermo-regulator actuates the circulator; after a time delay of P01 seconds from the
circulator pump startup, the compressor also will turn ON. However, during the power off status, the circulator pump turns off
with a delay of P02 minutes after shutdown status by mean of the thermo-regulator (the shutdown status is corresponding to the
off status of the compressor).
If the flow switch alarm is active in automatic reset, the pump is anyway ON even if the compressor is off.
If you enable the operation of the unit from "DI2" digital input corresponding to the remote "on-off" the circulator will start
operation immediately for 2 minutes regardless of the internal thermoregulation of the unit (the activation of water recirculation
in the plant circuit leads to the correct activation of the thermoregulation).
7.2.2 OPERATION UNDER THERMOREGULATOR CALL WITH PERIODIC ACTIVATION
The function is disabled if P17= 0 (default). If the pump is set to operate by thermo-regulator actuation (P03 = 1), it will be
activated periodically for a duration given by the parameter P17 (in seconds) after a counting time set by the parameter P16 (in
minutes), activated when the thermoregulation is fulfilled and the pump turned off.
In case of activation of the flow switch alarms with automatic reset the pump is still ON even if the compressor is off.
The periodic function is interrupted also in case of intervention of the antifreeze thermo-regulator which constrains the pump to
operate. To change the parameters, please see paragraph please see paragraph 11.4.
7.2.3 OPERATION WITH ACTIVE ELECTRIC HEATER
The presence of optional “GI” module is needed for this functions.
See paragraph 9.8.6.
7.2.4 CONTINUOUS OPERATION
In this mode of operation (active if P03 = 0), the pump is always ON. It turns off only when the unit stops to operate.
7.2.5 LINEAR REGULATION OF THE CIRCULATOR – DOUBLE ΔT
Water
–
The analog output varies according to difference in temperature between water inlet and water outlet of the heat exchanger.
• P06 set ΔT
Water inlet/outlet
of modulating pump in heating mode
• P07 maximum speed of the modulating pump
• P08 minimum speed of the modulating pump
• P09 set ΔT
Water inlet/outlet
of the modulating pump in cooling mode.
• P10 Modulating pump linear band
− In cooling mode: [T
Water inlet
] – [T
Water outlet
]
− In heating mode: [T
Water outlet
] – [T
Water inlet
]