MAXA i-32V5C MIDI 0121, Manual

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Controllo per i-32V5 MIDI
Air/water inverter chillers and heat pumps with axial fans
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In this way the heat pump will stop at the set point and the thermal jump, according to the set offset, will be borne by the boiler and/or the
integration resistors.
19. ANTIFREEZE PROTECTION RESISTANCES (IF KA ACCESSORY IS PRESENT)
In units with KA accessory, this function is active from the factory configuration. The kit consists of an antifreeze heater positioned on the ex-
changer on the system side and a heating cable placed on the base of the unit. The installer can modify the operation of the antifreeze resistors
by accessing the relative parameter menu:
PRG -> PSS -> PRG -> (enter installer password) -> PRG -> PAr -> PRG -> Fro
In heating mode, the water antifreeze heater is activated when the flow water temperature falls below r02 (default r02 = 4,0°C), it is switched
off when the temperature measured by the outlet water probe exceeds r02 + r06 °C.
If the unit is in OFF or cooling mode, the water antifreeze heater is activated when the flow water temperature falls below r03 (default r03 =
4,0°C), it switches off when the temperature measured by the outlet water probe exceeds r03 + r06 °C.
The crankcase heater, on the other hand, switches on when the outside air temperature falls below 3°C and switches off when the outside tem-
perature exceeds 5°C.
20. PARTIAL RECOVERY WITH DESUPERHEATER (IF DS ACCESSORY IS PRESENT)
This option allows to produce free hot water through partial heat recovery by desuperheating the gas from the compressor outlet. Units with
DS accessory are equipped with a control expansion board, which allows the connection of a water temperature probe for DS to activate the call
for recovery.
To enable operation, the following parameters must be set and the DS water temperature probe must be connected to terminal XC-121.1/12.2:
Parameter VALUE TERMINAL Function
rE01
1 DS enabled in chiller mode
H17
6 XC-121.1/12.2 DS water temperature sensor
Recovery is enabled for operation if all the following conditions are met:
• Compressor in operation
• Defrosting is not in progress and is not counting to enter defrost mode.
• There are no safety controls or restrictions active
The recovery call is activated if the temperature detected by the probe falls below the setpoint
San – 4,0
°C and is deactivated when the tem-
perature exceeds the setpoint San .
For more information see the technical bulletin of the unit.
NOTE: The partial recovery function does not activate if a defrost is in progress or if the countdown to enter defrost is in prog -
ress.
21. LOGICS THAT CAN BE ACTIVATED WITH GI MODULE - SYSTEM MANAGEMENT (ACCES-
SORY)
If the System Management kit (optional) is present, a second control is located inside the electrical panel that acts as an I/O resource expansion
module. With this second control it is possible to increase the number of logics that can be managed by the main control; in particular, these
logics are used for system management and are listed below:
Parameter VALUE Function
H86
9 Compressor operation signalling
H87
24 Alarm signalling
H88
47 Machine block signalling
H89
31 *Plant season signalling
H90
21 *Defrosting in progress signalling
(*) only for heat pump units
22. PERMITTED CONFIGURATION TABLES
Below is a table of user and installer parameters including all the permitted configurations. Not all the configurations listed can be selected at the
same time. The values listed below may be subject to updates, in case of doubt please contact the company.
CAUTION:
• All operations with INSTALLER visibility must be carried out by QUALIFIED PERSONNEL.
• Values that differ from the default values may compromise the correct operation of the machine; if in doubt about the value
to be set, contact the head office.
• The company excludes all contractual and extra-contractual liability for damage caused to persons, animals or things, due to
installation, adjustment and maintenance errors, improper use or partial or superficial reading of the information contained in
this manual.
• No responsibility is accepted for damage or malfunctions caused by changes to the factory parameters made by third parties
who have not been expressly authorised to do so.