MAXA i-32V5C MIDI 0121 - Analogue Input Set-point Modification; Circulator Modes and Compressor Logic

Controllo per i-32V5 MIDI Air/water inverter chillers and heat pumps with axial fans
12
EXAMPLE: consider that we want to obtain the following condions in heang mode:
• set-point of 28°C with external temperature of 18°C
• set-point of 45°C with external temperature of 2°C
Set Hea = 28 e b08 = 1, while the other parameters will be calculated as follows:
• b10 = 45 – 28 = 17
• b12 = 18
• b14 = 2 – 18 = -16
EXAMPLE: consider that we want to obtain the following condions in cooling mode:
• set-point of 12°C with external temperature of 25°C
• set-point of 7°C with external temperature of 35°C
Set Coo = 12 e b08 = 1, while the other parameters will be calculated as follows:
• b09 = 7 – 12 = -5
• b11 = 25
• b13 = 35 – 25 = 10
7. 
Another type of regulaon allows the set-point to be modied by adding (or subtracng) a value according to the voltage input ST11. To enable
this funcon it is necessary to connect the signal between the terminals indicated in chapter 5 and set the parameter H22 = 40. To use this func-
on, change the values of the following control parameters:
• b15 = Maximum decalibraon value
• b20 = 0 for input type 0-10 V (default)
• b20 = 1 for raometric input
Correcon calculaon with input 0-10 V (b20=0):
• With input at 0 Volt the current set-point will be: set (Coo/Hea) – b15/2
• With 5 Volt input the set-point will be the one set (Coo/Hea)
• With an input at 10 Volt the current set-point will be: set (Coo/Hea) + b15/2
SETPOINT FROM ANALOGUE INPUT
Input 0-10V
Ra�ometric input
Temp.
set
Coo/Hea
Coo/Hea + b15/2
Coo/Hea
-
b15/2
0 V
0 %
5 V
50 %
10 V
100 %
Correcon calculaon with raometric input (b20=1):
• With input at 0% the current set-point will be: set (Coo/Hea) – b15/2
• With input at 50% the set-point will be that set (Coo/Hea)
• With input at 100% the current set-point will be: adjusted set (Coo/Hea) + b15/2



8. CIRCULATOR
The circulator of the unit can be set in the following operang modes. To congure the circulator is necessary to access the relevant parameter.
PRG -> PSS -> PRG -> (insert installer password) -> PRG -> PAr -> PRG -> PUP
The circulator can be congured to operate independently of the compressor or on call:
• P03 = 0 for connuous operaon (default)
• P03 = 1 for operaon on thermoregulator call