MAXA Hi-T2 User manual

Hi-T2 Centralised controller
2
07 01-2021 M.S. A.B. Special functions chapter updated
06 09-2020 M.S. A.B. Dynamic setpoint chapter update, Hi-T configuration parameters and fan coil
05 02-2020 M.S. A.B. Fan use mode parameter update
04 05-2019 M.S./D.M. A.B. Updates and fixes
03 02-2019 M.S. A.B. Alignment to V323R103S16
02 12-2018 M.S. A.B. Aligned to V323R103S12
01 09-2018 M.S. A.B. Aligned to V323R103S12, terminal block update
00 07-2018 D.M. A.B. Aligned to V323R103S08
Rev Date Issued Approved Update description
Catalogue
MUI01137I0100-06
Series
REMOTE CONTROL FOR CHILLERS AND HYDRONIC TERMINALS
Any waste electrical and electronic products must not be disposed of with normal household waste, but disposed of in accordance with the WEEE law based
on the European directives 2002/96 / EC and subsequent amendments 2003/108 / EC, inquiring at the Municipality of residence or at the retailer i
f the
product is replaced with a similar one. NOTES: What is reported and described in this manual may not fully coincide with the device in question ("Hi-T2: LCD
touch-screen centralized control for hydronic terminals combined with i-HWAK V4, i-SHWAK V4, i-32 V5 chillers , i-HP / i-HP LT, i-MAX, HWA1 "). The Company
reserves the right to make changes and updates with respect to what is indicated in this manual.

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CONTENTS
1GENERAL NOTES.................................................................................................................................................. 5
1.1 PERMITTED USE........................................................................................................................................................................... 5
1.2 PROHIBITED USE.......................................................................................................................................................................... 5
1.3 TECHNICAL DATA......................................................................................................................................................................... 5
1.4 ELECTROMECHANICAL CHARACTERISTICS .................................................................................................................................. 5
2I/O RESOURCES ................................................................................................................................................... 6
2.1 KEYBOARD PCB............................................................................................................................................................................ 6
2.1.1 LAYOUT ................................................................................................................................................................................... 6
2.1.2 TOUCH-SCREEN USE................................................................................................................................................................ 6
2.1.3 DISPLAY ................................................................................................................................................................................... 6
2.1.4 POWER SUPPLY ....................................................................................................................................................................... 6
2.1.5 ANALOGUE INPUTS ................................................................................................................................................................. 6
2.1.6 SERIAL AND CONNECTIVITY..................................................................................................................................................... 6
2.2 CLOCK.......................................................................................................................................................................................... 6
2.3 CONNECTIONS............................................................................................................................................................................. 7
2.4 INSTALLATION ............................................................................................................................................................................. 7
3USER INTERFACE ................................................................................................................................................. 8
3.1 ICONS DISPLAY ............................................................................................................................................................................ 8
3.2 SCREENS AND ICONS ................................................................................................................................................................... 8
3.3 START PAGE................................................................................................................................................................................. 8
3.4HOME PAGE ................................................................................................................................................................................ 9
3.4.1 CHILLER/HEAT PUMP PAGE..................................................................................................................................................... 10
3.4.2 FAN COIL PAGE........................................................................................................................................................................ 13
3.4.3 AREA Hi-T2 .............................................................................................................................................................................. 14
3.4.4 ETHERNET CONNECTION CONFIGURATION ............................................................................................................................ 14
3.5 SECOND MAIN PAGE ................................................................................................................................................................... 15
3.6 SYSTEM MAIN PAGE .................................................................................................................................................................... 15
3.6.1 STATUS SETUP PAGE ............................................................................................................................................................... 16
3.6.2 SET-POINT SETUP PAGE........................................................................................................................................................... 16
3.6.3 PROGRAMS PAGE (CHRONOTHERMOSTAT)............................................................................................................................ 16
3.6.4 SPECIAL FUNCTIONS PAGE ...................................................................................................................................................... 17
3.6.5 CONFIGURATION PAGE ........................................................................................................................................................... 17
3.6.6 HELP PAGE............................................................................................................................................................................... 19
4MACHINES STATUS AND FUNCTIONS ................................................................................................................... 19
4.1 NETWORK MANAGEMENT .......................................................................................................................................................... 19
4.2 CHILLER/HEAT PUMPS MANAGMENT ......................................................................................................................................... 20
4.2.1 ENABLING INDIVIDUAL CHILLERS FOR DHW PRODUCTION .................................................................................................... 20
4.3 MANAGEMENT OF FAN COIL UNITS ............................................................................................................................................ 20
4.4 INITIAL CONFIGURATION PROCEDURE OF HI-T2 REMOTE CONTROL PANEL ............................................................................... 20
4.4.1 ADDRESSING............................................................................................................................................................................ 20
4.4.2 NETWORK SCANNING ............................................................................................................................................................. 20
4.4.3 ASSIGNMENT OF THE FAN COILS TO THE ZONES AND ZONE NAME CUSTOMISATION........................................................... 21
4.5 SOLAR MANAGEMENT ................................................................................................................................................................ 21
4.6 OPERATION OF CONNECTED UNITS............................................................................................................................................. 21
4.6.1 SWITCHING ON/OFF................................................................................................................................................................ 21
4.6.2 SWITCHING ON/OFF DHW MODE ........................................................................................................................................... 22
4.6.3 SET-POINT SET-UP ................................................................................................................................................................... 23
4.6.4 PROGRAMS SETUP (CHRONOTHERMOSTAT) .......................................................................................................................... 25
4.6.5 ROOM THERMOSTAT .............................................................................................................................................................. 27
4.7 KEYBOARD SETTING PROCEDURE................................................................................................................................................ 28
4.7.1 SETTING OF LANGUAGE AND DATE/TIME............................................................................................................................... 28
4.8 DIAGNOSTIC ERRORS................................................................................................................................................................... 29
4.8.1 ACTIVE ALARMS ...................................................................................................................................................................... 29
4.8.2 ALARM HISTORY...................................................................................................................................................................... 29
4.9 DOUBLE SET-POINT FUNCTIONS.................................................................................................................................................. 29

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4.9.1 DEW POINT CONTROL ............................................................................................................................................................. 30
4.10 CLIMATIC COMPENSATION ......................................................................................................................................................... 31
4.11 OTHER FUNCTIONS...................................................................................................................................................................... 33
4.12 SPECIAL FUNCTIONS.................................................................................................................................................................... 33
4.12.1 SCREED FUNCTION .............................................................................................................................................................. 33
4.13 PASSWORD AND PROTECTIONS .................................................................................................................................................. 34
5REMOTE ACCESS.................................................................................................................................................. 34
5.1 SECURITY ..................................................................................................................................................................................... 34
5.2 LOCAL WEB SERVER..................................................................................................................................................................... 34
6FIRMWARE UPDATE ............................................................................................................................................ 37
7HI-T2 CONFIGURATION PARAMETERS .................................................................................................................. 37
8FAN COIL CONFIGURATION PARAMETERS ............................................................................................................ 41
9DESCRIPTION OF RFC SYSTEM.............................................................................................................................. 42
10 CONNECTION NETWORK...................................................................................................................................... 43

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1GENERAL NOTES
1.1 PERMITTED USE
Hi-T2 is a touch screen remote control panel for centralised management of a network of chillers/heat pumps and RFC system. It
can also be used for partial functions (i.e. as a remote control panel of a single chiller/heat pump or ambient temperature
thermostat for managing the different zones).
It includes humidity and temperature sensors for the thermo hygrometric analysis of the environment and for the management of
the double set point for radiant floor heating systems that use a dehumidification system.
The intuitive interface simplifies the use of the controller; all the functions can be easily set through the use of an easy to
understand synoptic.
The remote control supervises and periodically examines the network, there is a cycle time that elapses between the signalling or
command request and the activation of the function, the cycle time depends on the size of a network of fan coils and heat pumps.
For multi-circuit units, only the resources and parameters of the first circuit are displayed.
1.2 PROHIBITED USE
Any use different than that permitted is PROHIBITED.
1.3 TECHNICAL DATA
Characteristics
Typical
Min.
Max.
Supply voltage
12Vac
10Vac
14Vac
Supply frequency
50 - 60Hz
Tip-5%
Tip+5%
Operating ambient temperature
25°C
0°C
50°C
Operating humidity (non-condensing)
30%
10%
90%
Ambient temperature for storage
25°C
-20°C
70°C
Ambient storage humidity (non-condensing)
30%
10%
90%
Class of device (EU REG 2013-811)
4
Contribution of temperature control to the seasonal energy
efficiency of heating environment. (REG EU 2013-811)
2%
1.4 ELECTROMECHANICAL CHARACTERISTICS
Terminals and
connectors
Screw terminals
Analogue inputs
1 NTC probe on board
1 humidity probe on board
Serial
1 USB Host (per mass-storage plug)
1 Isolated RS485 for chiller/heat pump and fan coils network
1 TTL serial port for future use (optional plug-ins)
1 Ethernet port
Transformer
Device not included
Clock
RTC clock with backup capacitor
Display
LCD TFT 4.3” 480x272 pixel
Keys
Resistive touch screen mounted on the LCD
Overall dimensions
128x81.2mm depth 35mm (box)
Case
In white plastic

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2I/O RESOURCES
2.1 KEYBOARD PCB
2.1.1 LAYOUT
Figure 1. Layout.
2.1.2 TOUCH-SCREEN USE
The interface has a resistive touch-screen on the LCD with sensitive areas applied to the contextual content of the active screen.
It allows you to select items or perform functions with ease.
Do not exert too much pressure on the touch screen with your fingers and do not use a sharp object on the touch screen. Doing so
may damage the touch screen or cause it to malfunction.
It is advisable to exert weaker pressure and not to act too quickly on the screen and to become familiar with the use of the touch-
screen itself, well calibrating the touch of your fingertip on the sensitive areas of the screens.
Do not put the touch-screen in contact with other electrical devices. Electrostatic discharge may cause a malfunction.
2.1.3 DISPLAY
The display is a TFT LCD 16/9 format with a diagonal 4.3". The resolution is 480 x 272 pixels. The LCD is handled with 16bit colour
depth (65535 colours).
2.1.4 POWER SUPPLY
Description
Characteristics
ID
POWER SUPPLY 12VAC
12Vac (min. 10Vac – max. 14Vac)
2.1.5 ANALOGUE INPUTS
Description
Characteristics
ID
Room temperature
NTC probe, conversion range -20°C ÷+100°C
Ambient humidity
0% - 90% at temperatures between -20°C and 60°C
2.1.6 SERIAL AND CONNECTIVITY
Description
Characteristics
ID
USB
USB Host (for mass storage plug) / connector type A
USB
RS485 isolate
Modbus Serial to chiller/heat pump and fan coils
TTL
Modbus serial TTL for future use
ETH
Ethernet port 10/100 BASE T for minimal web-server
2.2 CLOCK
There is a clock with backup battery.
INP. 12VAC
RS485
CHILLER AND FAN
COIL NETWORK
ISOLATED RS485
SUPERVISION
DIGITAL INP.

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2.3 CONNECTIONS
Terminals 1 and 2: connect 12 V ac power supply (chiller 12V- and 12V+ terminal block).
Terminals 3-4-5: connect the bus RS-485: terminal 3 with GNDR, terminal 4 with R- and terminal 5 with R+.
R+
R-
12V+ 12V-
GND
12 3 4 5 678
12 11 10 9
Figure 2. Connections.
2.4 INSTALLATION
The Hi-T2 controller can be fixed to the wall according to DIN 503 standard.
On its back, there are some pre-drilled holes which can be removed by exerting the required force with a manual screwdriver, in
order to get fixing holes. Of the 6 slots, use only the outer 2 slots of the horizontal series (see figure).
Before carrying out such operation, open the control panel itself by applying a slight pressure on its lower and upper parts, so as to
separate the rear panel from the front panel.
Use the rear panel and apply the holes in the two slots shown in the figure below.
Do not use the rear panel directly as a template for making holes in the wall, the electronic components may be damaged during
this operation.
Figure 3. Slots for wall mounting.

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3 USER INTERFACE
The keyboard can be used in the following ways:
•Interface panel (unit interface) for a single chiller/heat pump.
•Chiller/heat pump network manager
•Chiller/heat pump and fan coil network manager
•Fan coil units network manager
To manage the system modularity, the interface foresees a home page which summarises the whole plant, showing dynamically the
enabled resources and hiding the ones not available in the current configuration. The interface also provides a second summary
page including all the temperature and humidity values detected in the system.
Through the menu it is possible to have access to:
•Plant configuration
•Single units statuses
•Zone, machine or plant settings
Otherwise it is possible to directly access detailed information from the home page, by pressing on the display where the
summarised information is located. E.g., pressing where the main information of the heat pump is located, you can enter in the
menu of the heat pump status.
3.1 ICONS DISPLAY
All icons on the different screens can be shown in full colours or faded as in the following example:
The colour saturation indicates that the icon is usable; when pressed the related function is performed.
The transparency indicates that the icon is not usable and touching it has no resulting action.
For what concerns the side sliding bar which appears on the left side of the screen related to the single units connected in a network
(see Paragraphs 3.4.1.3, if an icon appears fully coloured the related function is enabled and, in that specific moment is also active
(i.e. if the “water antifreeze” icon of the heat pump is present and coloured, as shown below, the plate exchanger electrical heaters
are switched on).
Instead, if the icon appears but is transparent, the related function is enabled but not currently activated (i.e. if the “water
antifreeze” icon of the heat pump appears transparent, as shown below, the plate exchanger electrical heaters are ready to work
but currently switched off).
3.2 SCREENS AND ICONS
There might be some differences between screens and icons as they are currently shown. The Company reserves the right to modify
and update them without prior notice and in relation to that shown in the present manual.
3.3 START PAGE
Figure 4. Start page.
When turning ON the Hi-T2 control panel, a splash screen appears with a logo to leave the time needed for loading the system.
Loading...

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3.4 HOME PAGE
The home page has the following appearance:
Figure 5. Home page – indication meanings.
From the home page it is possible to access the different device’s screens, by simply touching the displayed resource.
The sensitive areas (indicated in the image by red boxes) inside this page are:
1. Chiller/heat pump (for multi-circuit units, only the resources of the first circuit are displayed)
2. System status and mode
3. Fan coil (with a status message of dehumidification active mode)
4. Display of any active alarms in the system
5. Information and location of the company
6. Name of the keyboard (access to information on the firmware version)
7. Configuring the Ethernet network
8. Log-out (intermittent symbol if active)
9. Navigation arrow, next page.
Graphically, it also contains information on the presence or absence of the following utilities:
10. Storage tanks (plant or whether solar storage tank is present)
11. Radiant panels
12. Sanitary mode
13. Solar.
On the main screen, in fact, only utilities present and properly installed in the network or the active warnings at the time of viewing
are displayed.
If, for example, the network consists only of one or more chillers/heat pumps, without production of DHW and without storage
tank, the screen graphically shows the presence of the chiller, but no other utilities appear inside the house; in this case the
appearance is as below (Figure 6. Home page – only chiller is networked.):
Figure 6. Home page – only chiller is networked.
logout
2
3
1
11
12
13
5
6
4
7
8
9
10

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Figure 7. Chiller/heat pump.
Referring to the above figure, it is possible to obtain the following information:
•presence of networked chillers (if touching the chiller you access the chiller screens);
operating mode of the chiller (winter , summer , DHW, OFF if none of the previous three symbols appear on
the screen);
•operating status of the chiller (compressor running): the operation of the chiller graphically indicated by the rotation
of the fans).
Furthermore, the following information on fan coils can be found directly on the home page:
•Presence of networked fan coils, if the fan coil symbol appears (Figure 8. Networked fan coils.);
•Fan coil units in dehumidification mode, if the symbol of the drops on the fan coil appears (Figure 9. Fan coils in
dehumidification mode.).
Figure 8. Networked fan coils.
Figure 9. Fan coils in dehumidification mode.
3.4.1 CHILLER/HEAT PUMP PAGE
From the home page, touching the chiller symbol (sensitive area number 1, Figure 5. Home page – indication meanings.), grants
access to the screen of the chillers present in the network.
From here you can access to the information related to the operations of the chiller; then you can uniquely identify each chiller
present by giving them names.
Figure 10. Chiller page – information and sensitive areas.
The information on the chiller’s page is:
Chiller 01
Status
ON
Mode
5
3
7
4
1
2
6
8
9
boost