MAXA i-32V5C MIDI 0121 - Operation Modes: Joint and Substitution

Controllo per i-32V5 MIDI Air/water inverter chillers and heat pumps with axial fans
20
INTEGRATION LOGIC
r22
Heat pump + Boiler/Heater
JOINT OPERATION I ZONE
Boiler + Heat pump/Heater
JOINT OPERATION II ZONE
Boiler/Heater
OPERATION IN SUBSTITUTION
Heat pump
STANDARD WORKING
r28
r08
Outside
temp.
If it is necessary to change the values of the parameters, the formula  must be followed.
Seng r22 = r28 it is possible to eliminate the zone relave to joint operaon 1st band; by seng r28 = r08 it is possible to eliminate the zone
relave to joint operaon 2nd band; by seng r22 = r28 = r08 it is possible to eliminate both bands relave to joint operaon.
The intervenon priories of the auxiliary heaters are dened by parameters r14, r20, r23, r24 (as described above).

OPERATION HEAT PUMP MODE
Normal operaon of the heat pump in which the integraon heaters and-or the boiler only intervene when a heat pump alarm is triggered.

If the outdoor temperature is between r22 and r28, the compressor operates in synergy with the auxiliary heaters in winter or DHW mode. In
this operang bracket, rst the heat pump is acvated and aer r12 minutes the plant side auxiliary heaters, or aer r16 minutes the sanitary
side auxiliary heaters.
Operaon returns to normal if the outside temperature is greater than  °C.
Note: In the joint operaon band, the boiler is thermoregulated by the system water remote probe (if acve), in parcular if the temperature
detected by the remote probe is lower than the Hea setpoint,the boiler is acvated, and then deacvated when the temperature detected by
the remote probe is higher than Hea setpoint. The heat pump is also thermoregulated by the system water remote probe (as described above).
If the remote system water probe is not acve, the boiler is controlled by the ow probe of the heat pump.

If the outside temperature is between r28 and r08, the auxiliary heaters are enabled in combinaon with the heat pump in heang or DHW
mode. In this operang range, the boiler is acvated rst, then the heat pump and auxiliary heaters are acvated aer a me dened by r12
minutes for the system side or aer r16 minutes for the DHW sanitary.
Operaon returns to normal if the temperature rises above  °C.
Note: In the joint operaon band, the boiler is thermoregulated by the remote system water probe (if acve), in parcular if the temperature
detected by the remote probe is lower than the Hea setpoint,the boiler is acvated, and then deacvated when the temperature detected by
the remote probe is higher than Hea setpoint. The heat pump is also thermoregulated by the system water remote probe (as described above).
If the remote system water probe is not acve, the boiler is controlled by the ow probe of the heat pump.
OPERATION IN SUBSTITUTION
If the outside temperature falls below r08 the heat pump compressor is disabled and the auxiliary devices operate in place of it. The compressor
is enabled again if the temperature rises above  (default r09 = 1.0 °C).
If the auxiliary system consists of system and/or DHW resistors, they operate according to the mes dened by parameters r12 (minutes) for the
system side and r16 (minutes) for the DHW side. In the substuon operaon band, it is not necessary to enable the integraons with r10 or r15
since the resistances must operate as a replacement for the heat pump (it is therefore sucient to select the type of use from parameter r24).
If the auxiliary system is a boiler with autonomous thermoregulaon (r32 = 2 or 3),it is enabled independently of the thermoregulaon of the
heat pump.
If the replacement auxiliary system is a boiler without a circulator (r32 = 0 or 2), the heat pump circulator is acve when the boiler is enabled.
If the auxiliary system is a boiler with its own circulator (r32 = 1 or 3), the heat pump circulator is switched o and aer P01 (default 30 seconds)
the boiler is enabled.