MAXA i-32V5C MIDI 0121 - Auxiliary Systems and Integration; Auxiliary Resistances and Their Configuration

Controllo per i-32V5 MIDI Air/water inverter chillers and heat pumps with axial fans
18
Parameter VALUE 
L02
0 Funcon not acve
1 Enable Hz minimum
L03
0 Funcon not acve
1 Funcon acve only in cooling mode
2 Funcon acve only in heang mode
3 Funcon acve only in sanitary mode
4 Funcon acve in cooling and sanitary mode
5 Funcon acve in heang and sanitary mode
6 Funcon in cooling and heang mode
7 Funcon always acve
With the funcon acve, the output and power of the unit are limited, for addional informaon see the installer user manual.
17. MINIMUM HZ FUNCTIONS
When the funcon is acvated, the power of the unit is increased, for informaon contact the company.
18. AUXILIARY RESISTANCES
In some system soluons it may be necessary to use an integraon heater for the system and/or for the sanitary area. This is an addional re-
source for heang in case the compressor cannot meet the set in a reasonable me. The resistor controller only operates in heang mode and
if r10 = 1.
To dene how the integraon resistors are to operate, parameter r24 must be se:
• r24 = 0 for integraon resisitors not used;
• r24 = 1 for use of system integraon resisitor;
• r24 = 2 for use of sanitary integraon resisitance;
• r24 = 3 for use of both the system integraon resistor and the sanitary integraon resistor.
SYSTEM RESISTANCE
The system resistance must be connected to the digital output DO3 and can be congured by seng parameter H81 = 22.
If the regulaon temperature remains lower than the hot water set-point  (°C) for a me equal to r12 the integraon resistor is acvat-
ed according to the operaon of the machine in the combined or replacement bands.
The resistor is also acvated if the control temperature remains below the water set-point  (°C) and the machine is in lockout due to
the intervenon of an alarm. It switches o when the machine exits the alarm block.
Seng r21 = 1, during the defrost cycle, if required (temperature lower than Hea - r11), the system resistor is acvated without waing for the
me dened by r12.
The resistor switches o when the set-point is reached (also taking into account any oset set with parameters r29 or r30).
Parameter VALUE 
H81 22 System integraon resistance
r10 1 Enabling of system resistors
r11 5 (default) Delta resistances in system integraon (in tenths of °C)
r12 10 (default) System integraon acvaon delay (in minutes)
r21 1 Enabling resistors during defrosng
r24 1/3 Type of use resistors
SANITARY RESISTANCE
This funcon can be acvated as an alternave to the system integraon resistance. The DHW resistance must be connected to digital output
DO3 and can be congured by seng parameter H81 = 26, in addion the DHW funcon must be acve.
The resistance is acvated if the producon of domesc hot water lasts longer than r16 (minutes) or if the machine goes into lockout due to
the intervenon of an alarm. It switches o when the machine nishes DHW producon (also taking into account any oset on the set-point set
with parameter r31).
Parameter VALUE 
H81 26 DHW integraon resistor
r15 1 Enabling of DHW resistors
r16 10 (default) Sanitary integraon acvaon delay (in minutes)
r24 2/3 Type of use of resistance
INDIVIDUAL SYSTEM/HEALTH INTEGRATION RESISTENCE
Conguring the DHW resistance it is also possible to use it as a system resistor, by seng the parameter r15 = 2 and r24 = 3.
In this way, in the event of a request for system integraon, the resistance declared as DHW integraon is acvated, thus making it possible to
have a single integraon resistance for the system, DHW and defrosng.