MAXA i-32V5C MIDI 0121 - Boiler Enabling and Integration Logic

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Controllo per i-32V5 MIDI Air/water inverter chillers and heat pumps with axial fans
INTEGRATION RESISTANCE SELECTION MODE
The resistors can be acvated simultaneously if r14 = 0 (default), otherwise the priority of the order of acvaon of the system-side and DHW-
side integraon resistors can be set, in parcular the conguraons are:
• r14 = 1 for resistance acvaon in exclusion of each other;
• r20 = 0 for system priority (the domesc heang element is acvated only if the system-side thermoregulaon is sased);
• r20 = 1 sanitary priority (the system resistor is acvated only if the thermoregulaon on the sanitary side is sased).
CIRCULATOR MANAGEMENT WITH ACTIVE RESISTANCE
The circulator of the heat pump can be acvated when the plant and/or DHW integraons resistences are acve with the compressors not run-
ning (by substuon, by alarm or by integraon in bracket II or III):
• r33 = 0 for acvaon on request of the compressors or for any boiler request.
• r33 = 1 for acvaon with system resistance acve.
• r33 = 2 for acvaon with sanitary heang element acve.
• r33 = 3 for acvaon with system or sanitary resistor acve.
The circulator switched o aer post-pumping (P02).
BOILER ENABLING
Funcon which can be acvated instead of managing the double setpoint.
This is an addional resource to enable the boiler in integraon or substuon of the heat pump.
The relave digital output for enabling the boiler is DO7, it can be congured by seng parameter H85 = 29.
Dene the mode of use by seng parameter r23:
• r23 = 0 (default) for boiler not used (priority of resistor intervenon);
• r23 = 1 for boiler use on system only (priority of resistor intervenon);
• r23 = 2 for boiler use only in DHW mode (priority intervenon of the heaters);
• r23 = 3 per ulizzo caldaia sia in sanitario sia su impianto (priorità di intervento delle resistenze);
• r23 = 4 for boiler use in DHW and on system (priority intervenon of resistors);
• r23 = 5 for boiler use only in DHW mode with priority;
• r23 = 6 for boiler use in DHW mode and on system with priority;
Dene the boiler equipment by seng parameter r32:
• r32 = 0 for boiler without circulator with thermoregulaon charged to the heat pump
• r32 = 1 for boiler with autonomous circulator with thermoregulaon charged to the heat pump
• r32 = 2 for boiler without circulator with autonomous thermoregulaon
• r32 = 3 for boiler equipped with circulator with autonomous thermoregulaon
Parameter VALUE 
H81 29 Boiler enabling
r10 1 Enabling in system integraon
r12 10 (default) System integraon acvaon delay (in minutes)
r15 1 Enabling of sanitary integraon
r16 10 (default) DHW integraon acvaon delay (in minutes)
r23 1 ÷ 6 Type of boiler use
r32 1 ÷ 3 Boiler equipment
LOGIC OF INTEGRATION HEATERS AND/OR BOILER IN JOINT OPERATION OR IN SUB
STITUTION OF THE HEAT PUMP COMPRESSOR
The auxiliary parts that can be used for joint or for operaon in substuon are:
• boiler
• system integraon resistor
• domesc hot water integraon resistor
The parameters to be considered for adjusng this operang logic are:
• r22 = set for joint operaon with heat pump priority
• r28 = set for joint operaon with priority of auxiliary units
• r08 = set for replacement operaon
Considering the heang and/or DHW operang modes, there are 4 operang areas: