United Technologies Carrier 42AM Use and maintenance manual

CONTROL MANUAL
EC Mono Box
42AM - 42AMA
Original instructions FR7515390-00, 03.2017

EN
EN - 1
CONTENTS PAGE
1 - MONITORING AND REGULATION 2
1.1 Controller 2
1.2 The pLDPRO terminal 2
1.3 The controller 3
1.4 Description of the air handling units 3
1.5 Controller inputs and outputs 3
2 - CONFIGURING THE CONTROLLER 4
2.1 Configuring with master EC Mono Boxes only: 4
2.2 Configuring with slave EC Mono Boxes only: 5
2.3 State of the pLAN 8
3 - MANAGING A NETWORK OF MULTIPLE CONTROLLERS 8
3.1 pLAN electrical connections 8
3.2 Addressing the pLAN 9
4 - GENERAL DESCRIPTION OF THE SCREENS 9
4.1 Machine state 9
4.2 Setpoint menu 11
4.3 Machine parameters menu 11
4.4 Settings parameters menu 12
4.5 Read-only parameters menu 13
4.6 Versions Menu 13
4.7 Time schedule 14
4.8 Alarms menu 14
4.9 Test mode menu 15
4.10 Access level menu 15
5 - CONTROL 17
5.1 Starting the machine 17
5.2 42AM air heater control: 17
5.3 42AM A control: 19
5.4 The fault relays 20
6 - ALARMS 20
6.1 Description of faults displayed in the alarms menu 20
6.2 Fault table 20
Original text: French Version

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1 - MONITORING AND REGULATION
1.1 Controller
Each air heater is managed by the controller. In addition to its control functions, it also monitors and detects any faults with the
air handling unit.
IMPORTANT: To avoid any problems, the password must be known only by qualified personnel.
1.2 The pLDPRO terminal
The terminal is supplied equipped with an LCD screen (8 lines x 22 characters) with six control keys. It is installed on the front
of the unit's electrical box. It allows all of the program operations to be carried out. The terminal can be used to display the unit's
operating conditions and change its parameters.
The pLDPRO terminal displays the following data:
- Values of connected sensors
- Unit on/off cycles
- Calibration of the sensors
- Fault detection
- The password-protected configuration and operating parameters
- Device running times and time delays
The connection with the pLAN network allows the program to use a terminal mounted on the front of the AHU and/or a wall-
mounted terminal installed in the room to be air conditioned.
Key Description
Back button
Provides access to the "Menu"
The key is used to display the active faults in the alarms menu, to clear any
faults and indicate a fault if the red warning light on the key is lit.
The key has two functions:
1: to manage the screens on the display (next screen)
2: to adjust the values of the monitoring parameters (decrease)
The key has two functions:
1: to manage the screens on the display (previous screen)
2: to adjust the values of the monitoring parameters (increase)
-Enter key:
Used to access the various menus from the drop-down menu to validate the data
entered.
+ -Unit on/off: press these keys simultaneously to switch the unit on/off.

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1.3 The controller
The descriptions of the terminals on the controller are provided below.
RX-/TX-
RX+/TX+
GND
Vout
RX-/TX-
RX+/TX+
GND
C1
NO1
NO2
NO3
C2
NO4
NO5
NO6
NO7
C3
NC7
G
G0
B1
B2
B3
B4
B5
B6
B7
GND
+Vdc
+Vdc
GND
+5 Vref
GND
Y1
Y2
Y3
DI1
DI2
DI3
DI4
DI5
DI6
DI7
DIC1
J2 - probe supply
J3 - analog input
J4 - digital input
J5 - analog output
J6
J7
J8
J9
J10
J11
J1 - power supply
J12 - group 1
J13 - group 1
J14 - group 2
L
N
RJ11 connector for the pLDPRO
configuration terminal (pLAN)
3-point connector to connect up
other units (pLAN)
FIELDBUS port
(configured in tLAN)
Valve output (not used)
On/Off outputs
24Vac - 1A - 100,000 cycles
230 V controller supply
Passive sensors power supply
Analogue inputs for
NTC - 0/1V - 0/5V sensors
Communication expansion board port
(Modbus, BACnet, LON, KNX)
On/Off inputs
0/10 V analogue outputs
1.4 Description of the air handling units
The unit can perform the following functions:
- Ventilation.
- Control, monitoring, reporting and regulation of the unit's component parts.
- The air is heated/cooled using the hot/cold water coil.
1.5 Controller inputs and outputs
* Contact state during operation
Terminal
Input Description *
Terminal
Outputs Description *
J3 B1 42AMA room temperature (NTC 10k) J5 Y1 42AM air heater fan speed
B2 Temperature (NTC 10k)
B3 Y2 Speed of the 42AMA destratifier or 42AM air heater
B4
B5
Y3 Hydraulic coil
B6
B7
J4 DI1 Changeover C J12 NO1 Fresh air damper control NO
DI2 Antifreeze thermostat C NO2
DI3 42AM air heater fan operation feedback O NO3
DI4 42AMA destratifier operation feedback O J13 NO4 Danger fault summary relay NO
DI5 Remote control C NO5 Maintenance fault summary relay NO
DI6 NO6
DI7 J14 NO7
J16 DI8
DI9 J5 Y4
DI10
J18 B8
J15
NO8
B9 NO9
B10 NO10
B11 NO11
B12 NO12

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2 - CONFIGURING THE CONTROLLER
The controller and display must be configured before the unit is commissioned.
2.1 Configuring with master EC Mono Boxes only:
The value of the display's factory-set address is '32'. It is pointless to only change it in the master EC Mono Box.
If the nn field is set to '0', the terminal will use the Point-to-Point Protocol (not the pLAN) to communicate with the controller and
the “I/O Board address: xx” field will disappear as it will not be necessary.
It is however essential to assign a controller to the pLDPRO display by giving it an address (I/O Board address):
●Power up the master EC Mono Box
●To switch to configuration mode, simultaneously press the , and , keys for approx. 5 seconds; the page shown below
will be displayed, with the cursor flashing in the top left corner:
Terminal config
Press Enter
To continue
●To change the controller address (I/O Board address) press twice: the cursor will move to the (--) field.
●using the key, select the value 01, and confirm by pressing the  key again. If the value selected is different from that
stored previously, the page for the following figure is displayed and the new value will be stored in the terminal's permanent
memory.
Display address
Setting ……………. : 32
I/O Board address : --
●Press  again.
P:01 Adr Priv/Shared
Trm1 32 Pr
Trm2 None --
Trm3 None -- Ok?No
●Set Trm1 to 32 by pressing , press  .
●Set value 'Pr' (Private) to 'Sh' (Shared) by pressing , press .
●Go to 'No' by pressing several times, select 'Yes' by pressing then .
The controller now has the correct address in Master mode only.
P:01 Adr Priv/Shared
Trm1 32 Sh
Trm2 None --
Trm3 None -- Ok?N

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2.2 Configuring with slave EC Mono Boxes only:
To configure the various slaves, the pLDPRO terminal must be removed from the master unit and connected to the slave units.
a) For the first slave:
●Power up the Slave EC Mono Box
●To switch to configuration mode, simultaneously press the , and , keys for approx. 5 seconds; the page shown below
will be displayed, with the cursor flashing in the top left corner:
Display address
Setting……………… : 32
I/O Board address : --
●Press .
●Change the Display address setting from 32 to 00 by pressing , then press .
Terminal config
Press Enter
To continue
●Switch off the Slave EC Mono Box.
●Switch it back on again and then immediately press and for approx. 15 seconds.
pLan address : 1
UP: increase
DOWN: decrease
ENTER: save & exit
●Change the pLan address to 2 by pressing , then press .
If there are no other Slave EC Mono Box(es), go to step c), otherwise go to step b) to configure the other Slave EC Mono
Box(es).
b) For the second Slave EC Mono Box:
●Connect the pLDPRO to the slave to be configured
●Power up the Slave EC Mono Box concerned and immediately press on and for approx. 15 seconds
pLan address : 1
UP: increase
DOWN: decrease
ENTER: save & exit
●Change the pLan address to 3 by pressing , then press 
If you have other Slave EC Mono Boxes to connect, simply adjust point b) by increasing the pLan address by 1 each time (e.g. 3rd
slave: pLan address 4, 4th slave: pLan address 5, etc.).

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c) Assigning pLDPRO/Master EC Mono Box display links:
●Connect the display to the Master EC Mono Box
●To switch to configuration mode, simultaneously press the ,and , keys for approx. 5 seconds; the page shown below
will be displayed, with the cursor flashing in the top left corner:
Display address
Setting ……………. : 00
I/O Board address : --
●Press .
●Change the Display address setting from 00 to 32 by pressing , then press .
Display address
Changed
●Press ,and again for approx. 5 seconds, the page below will display:
Display address
Setting ……………… : 32
I/O Board address : --
●Change the I/O Board address by pressing twice to position the cursor to – and move to 01 by pressing , then press .
Terminal config
Press Enter
To continue
●Press again.
P:01 Adr Priv/Shared
Trm1 -- Pr
Trm2 None --
Trm3 None -- Ok?No
●Set Trm1 to 32 by pressing , press .
●Set value 'Pr' (Private) to 'Sh' (Shared) by pressing , press .

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P:01 Adr Priv/Shared
Trm1 32 Sh
Trm2 None --
Trm3 None -- Ok?No
●Go to 'No' by pressing several times, select 'Yes' by pressing then .
The Master EC Mono Box/display connection has been made, the same operation must now be repeated on the Slave EC Mono
Box(es):
c) Assigning pLDPRO/Slave EC Mono Box display links:
●Connect the display to the Slave EC Mono Box.
●To switch to configuration mode, simultaneously press the ,and , keys for approx. 5 seconds; the page shown below
will be displayed, with the cursor flashing in the top left corner:
Display address
Setting …………… : 32
I/O Board address : --
●Change the I/O Board address by pressing twice to position the cursor to – and move to 02 by pressing , then press .
Terminal config
Press Enter
To continue
●Press  again.
P:01 Adr Priv/Shared
Trm1 -- Pr
Trm2 None --
Trm3 None -- Ok?No
●Set Trm1 to 32 by pressing , press .
●Set value 'Pr' (Private) to 'Sh' (Shared) by pressing , press .
P:01 Adr Priv/Shared
Trm1 32 Sh
Trm2 None --
Trm3 None -- Ok?No
●Go to 'No' by pressing  several times, select 'Yes' by pressing then .

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The Slave EC Box/display connection no. 1 has been made, if there are other slave boxes to be configured, repeat point d) by
increasing the I/O Board address by 1 each time (e.g. for the 2nd slave: I/O Board address 3; for the 3rd slave: I/O Board address
4, etc.).
The address configuration for the boxes and display is now complete; you can now refit the pLDPRO display on the Master EC
Mono Box and connect the master/slave boxes by connecting the terminals.
2.3 State of the pLAN
When the system starts up, the pLAN network may encounter a number of problems (card fault and terminal start-up) caused by
incorrect connections or a wrong address. The state of the pLAN network can be displayed in real time on a special mask in order
to identify which devices (controller or terminal) are correctly connected and addressed.
To display the special page, press and simultaneously for at least 10 seconds. After the first 5 seconds, a page is
displayed; after 5 more seconds, the next page appears:
NetSTAT Term : 17
Press Enter to quit
Once on the screen, network addresses 1 to 32 are displayed. The small rectangles represent the terminals and the large
rectangles , the controllers. If symbols appear then disappear, the pLAN may be unstable or, more likely, two components share
the same address. The number after Term indicates the address of the terminal used. The example shows that the network is
made up of 3 controllers with the addresses 1, 2, 25 and 4 terminals with the addresses 3, 4, 15 and 26. Once the page has been
verified, turn off the power, check the connections and addresses, then turn the power back on.
3 - MANAGING A NETWORK OF MULTIPLE CONTROLLERS
The pLAN network is the name of the physical network that links controllers to remote HMI terminals
pLAN = personal Local Area Network
The connection of the controllers via the pLAN network allows the datapoints of one controller to be exchanged for another,
following the logic set out by the program, i.e. the direction that these datapoints must follow and that from which they come. As a
consequence, they are not programmed by the user, who must only carry out the electrical connection.
3.1 pLAN electrical connections
3.1.1 Connecting controllers to the pLAN
The electrical connection between the controllers under the pLAN network (RS485) is carried out using an AWG20/22 shielded
cable composed of a twisted pair and a shield. The cards must be connected in parallel using the J7 or J8 connector.
The first and last controller must be no more than 500 m apart.
See diagram above "Networked controller"
"Networked controller"

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3.2 Addressing the pLAN
There is a range of 32 possible addresses (binary logic). As a result, a total of 32 controllers and terminals can be connected over
the pLAN network.
The pLAN network will not work if the same address is shared by two components!
pLDPRO
display
Address: 32
Master
controller
Address: 1
Master
controller
Address: 2
Master
controller
Address: 3
Master
controller
Address: 31
4 - GENERAL DESCRIPTION OF THE SCREENS
4.1 Machine state
U:01 00:00
00.0°c
On
Total Power
U:01 Indicates the unit's address
Indicates the request to switch the machine on or off
00.0°C Indicates the ambient temperature
00:00 Indicates the time
Indicates the "Heating" operating mode. When there is a request, the pictogram is activated.
Indicates fan operation. When there is a request, the pictogram is activated.

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To switch to another menu, press the or keys to scroll through the available menus. The selected menu is opposite the arrow
and on a black background. To confirm your choice, simply press  .
The available menus are as follows:
1 Setpoints
2Machine status
4 Mach. parameters
5 Adjust. params
6 Reading parameter
8 Test mode
9 Timer programming
11 Communication
13 Alarms
14 Access level selection
16 Program version
"Prg" key
Menu
□14.Access level
□16.Versions
□1.Setpoints
□2.Machine status
□4.Machine parameters

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4.2 Setpoint menu
No. Description Unit Min. Max. By default Increment Visibility Levels
Setpoints menu
P150 Cooling comfort temperature setpoint °C 15 30 20 0.1 - 1
P151 Eco cooling temperature setpoint °C Comfort
cooling stp 30 22 0.1 - 1
P152 Heating comfort temperature setpoint °C 8 27 18 0.1 - 1
P153 Eco heating temperature setpoint °C 8 Comfort heating stp 16 0.1 - 1
P154 Frost protection temperature setpoint °C 5 Eco heating stp 8 0.1 - 1
P155 42AMA setpoint °C 1 5 3 0.1 If 42AMA
present = YES 2
P156 ∆t 42AMA max °C ∆t stp 10 5 0.1 If 42AMA
present = YES 2
4.3 Machine parameters menu
No. Description Unit Min. Max. By default Increment Possible choices Visibility Levels
Machine parameters menu
P01 Unit size (a) - 0 15 0 1
0 -
- 2
1 - 42AM300
2 - 42AM351
3 - 42AM352
4 - 42AM353
5 - 42AM401
6 - 42AM402
7 - 42AM403
8 - 42AM451
9 - 42AM452
10 - 42AM453
11 - 42AM501
12 - 42AM502
13 - 42AM503
14 - 42AM631
15 - 42AM632
16 - 42AM633
P02 Supply type - 0 1 0 1 0 - 1-Ph
1 - 3-Ph - 2
P03 Coil type - 0 2 0 1
0 - Cooling
- 21 - Heating
2 - Mixed
P04 Controller type - 0 1 0 1
0 - Master
- 21 - Slave with sensor
2 - Slave without sensor
P10 Antifreeze thermostat
present - 0 1 0 1
0 - NO
2
1 - YES
P11 Fresh air damper present - 0 1 0 1
0 - NO
- 2
1 - YES
P12 42AMA present - 0 1 0 1
0 - NO
- 2
1 - YES
P20 42AM sensor calibration °C -5 5 0 0.1 - If controller type ≠ slave
without sensor 2
P21 42AM sensor calibration °C -5 5 0 0.1 - If 42AMA present = YES 2

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4.4 Settings parameters menu
No. Description Unit Min. Max. By
default
Increment Possible
choices
Visibility Levels
P100 Language - 0 1 0 1 0 - French 1
1 - English
P101 Time - 00:00 23:59 00:00 1-- 1
P102 Date - 01/01/2010 31/12/2050 01/01/2014 1-- 1
P110 Operating mode - 0 2 2 1
0 - Cooling
If coil type = mixed 21 - Heating
2 - Auto
P111 Operation type - 0 2 0 1
0 - Comfort
- 11 - Eco
2 - Frost protection
P115 Return air/fresh air - 0 1 0 1 0 - Return air If fresh air damper
present = YES 2
1 - Fresh air
P117 Aérotherm ventilation override - 0 1 0 1 0 - Auto - 1
1 - Man.
P118 Fan override speed % 0 Aérotherm fan
max speed 50 1 - If fan override = Man. 1
P119 Fan override time delay min. 0 180 30 1 - If fan override = Man. 1
P120 Aérotherm fan minimum speed % 0 Aérotherm
max. speed 0 1 - - 2
P121 Aérotherm fan maximum
speed %Aérotherm
min. speed
Calculated
max. speed 100 1 - - 2
P122 42AMA fan minimum speed % 0 42AMA max.
speed 0 1 - If 42AMA present = YES 1
P123 42AMA maximum speed % 42AMA min.
speed 100 100 1 - If 42AMA present = YES 1
P130 Hot Proportional Band op. °C 1 10 3 0.5 - If coil type = heating or
mixed 2
P131 Hot integration time op. min. 0 30 Def. 1 If coil type = heating or
mixed 2
P135 Cold Proportional Band op. °C 1 10 3 0.5 - If coil type = cooling or
mixed 2
P136 Cold integration time op. min. 0 30 Def. 1 - If coil type = cooling or
mixed 2
P140 High temperature fault
threshold °C Stp + Band 75 24 1 - - 2
P141 High temperature fault time
delay s 60 300 120 1 - - 2
P142 Low temperature fault
threshold °C 10 Stp + Band 12 1 - - 2
P143 Low temperature fault time
delay s 60 300 120 1 - - 2

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4.5 Read-only parameters menu
No. Description Unit Min. Max. By default Increment Possible choices Visibility Levels
P250 Aérotherm sensor temperature °C - - - - - - 1
P251 42AMA sensor temperature °C - - - - - If 42AMA
present = YES 1
P255 Aérotherm fan speed % - - - - - - 1
P256 42AMA fan speed % - - - - - If 42AMA
present = YES 1
P257 Valve opening % - - - - - - 1
P260 Fresh air damper state C - O - - - - Open/Closed If fresh air damper
present = YES 1
P261 Changeover contact state C - O - - - - Open/Closed If coil type
= mixed 1
P262 Fan operation feedback state C - O - - - - Open/Closed - 1
P263 Antifreeze thermostat state C - O - - - - Open/Closed
If frost protection
thermostat present
= YES
1
P264 Remote on/off command state C - O - - - - Open/Closed - 1
P265 42AMA operation feedback
state C O - - - - - If 42AMA
present = YES 1
P270 42AMA calculated ∆t °C - - - - - If 42AMA
present = YES 1
4.6 Versions Menu
U :01 PROGRAM pr1
42AM Control
V 03.00 11/07/16
Bios: 06.42
Boot: 04.05
Shows the name and version of the program installed on the microprocessor.

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4.7 Time schedule
The time must be set for the time schedule to work correctly.
The user will choose an operating mode in the operating mode parameter.
When there is a time schedule active according to the periods below, the regulation will deviate from the current mode and switch
into the mode selected by the time schedule.
Two types of schedule are possible. Weekly/yearly.
The time schedule can be used to switch between states: Off, Comfort, Eco and Frost protection.
If two schedule periods overlap, priority is given to the annual schedule in the following order:
Annual 1 → Annual2 → Annual3 → Annual4 → Weekly1 → Weekly2 → Weekly3 → Weekly4.
Weekly1
Period 00:00 →00:00
State:
---------------------
□ Sunday □Monday
□Tuesday □Wednesday
□ Thursday □ Friday
□Saturday
Weekly2
Period 00:00 →00:00
State:
---------------------
□ Sunday □Monday
□Tuesday □Wednesday
□ Thursday □ Friday
□Saturday
Weekly3
Period 00:00 →00:00
State:
---------------------
□ Sunday □Monday
□Tuesday □Wednesday
□ Thursday □ Friday
□Saturday
Weekly4
Period 00:00 →00:00
State:
---------------------
□ Sunday □Monday
□Tuesday □Wednesday
□ Thursday □ Friday
□Saturday
→→→
Period 00:00 → 00:00 Start and end times (hour and minute) of weekly time program period
State: Selection of the state during this period: ------
Off
Comfort
Eco
Frost protection
□Sunday
□Monday
□Tuesday
□Wednesday Day of the week on which the weekly time schedule is applied (■⍰= day selected)
□Thursday
□Friday
□Saturday
Annual1
Start date 00/00/2000
Start time 00:00
End date 00/00/2000
End time 00:00
State:
---------------------
Annual2
Start date 00/00/2000
Start time 00:00
End date 00/00/2000
End time 00:00
State:
---------------------
Annual3
Start date 00/00/2000
Start time 00:00
End date 00/00/2000
End time 00:00
State:
---------------------
Annual4
Start date 00/00/2000
Start time 00:00
End date 00/00/2000
End time 00:00
State:
---------------------
→
→→
4.8 Alarms menu
Pressing the key confirms and clears all faults that are no longer present.
To view faults that are still present, press the keys (see description of faults in paragraph 5.1)
The following screen appears when no faults are present:
.
No faults!
Start date 00/00/2010 Start day, month and year of yearly time schedule
Start time 00:00 Start time in hours and minutes of yearly time schedule
Start date 00/00/2010 End day, month and year of yearly time schedule
Start time 00:00 End time in hours and minutes of yearly time schedule
State: Selection of the state during this period: ------
Off
Comfort
Eco
Frost protection

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4.9 Test mode menu
f1
Overriding the outputs
Unit off
If all the controller's outputs are overridden, the alarms will not be signalled on the display.
Disconnecting the display will maintain the override and may result in damage to the hardware.
This menu can only be accessed in level 3 and with the unit off.
WARNING!
ACTIVATION OF ALL OVERRIDES IS THE PROGRAMMER'S RESPONSIBILITY
NONE OF THE SAFETY DEVICES IS OPERATIONAL
The unit must be in mode "".
Select the unit to be changed by pressing the key or the  key. Confirm by pressing ENTER.
The cursor places itself below the override authorisation (free or overridden). Confirm by pressing ENTER.
The cursor places itself under the override value. Display the new value by pressing the key or the key. Confirm by pressing
ENTER.
The unit is now in "test mode".
The overrides are cancelled when the unit is set back to "on"
Output Parameter Setting range Default value Access level Mask
Aérotherm ventil State 0-10 V 0-100% 0% 3 f2
42AMA ventil State 0-10 V 0-100% 0% 3 f3
Coil valve State 0-10 V 0-100% 0% 3 f4
Fresh air damper Damper state Open/Closed Closed 3 f5
Fault relays
Danger Open/Closed Closed 3 f6
Maintenance Open/Closed Closed 3 f6
4.10 Access level menu
Access levels .
Current level: 1
Access level 1 ->
Level 2 access
Level 3 access
Displays the current level
Visible only if the current level = 2 or 3, used to access or return to level 1
Visible only if the current level = 1 or 3, used to access or return to level 2
Visible only if the current level = 1 or 2, used to access or return to level 3
Access levels .
LEVEL 1 ACCESS
Back to level 1:
No
If level 1 access selected
If yes back to access level 1

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Access levels .
LEVEL 2 ACCESS
Password: 0000
If access level 2 selected and access level = 1
Re-enter the installer password
Access levels .
LEVEL 2 ACCESS
Enter new code
level 2?
No
If password ok
If yes, change the installer password. If no, back to current access level page
Access levels .
LEVEL 2 ACCESS
New password:
0000
No Re-enter the new installer password
Access levels .
LEVEL 2 ACCESS
Back to level 2:
No
If access level 2 selected and access level = 3
If yes back to access level 2
Access levels .
LEVEL 2 ACCESS
Back to level 2:
No
If access level 2 selected and access level = 1
Re-enter the manufacturer password
The level 2 password can be reset to the factory value. To do this, go to level 2 access and press the "Prg" key for 10 seconds.

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5 - CONTROL
5.1 Starting the machine
Switching from OFF/ON or ON/OFF is done locally by pressing the 2 and keys on the display.
5.2 Aérotherm air heater control:
5.2.1 Choosing the type of operation:
This setting is used to choose the regulation operation mode.
Off
CFt: Comfort
ECO: Economy
H.GL: Frost Protection
Comfort
0%
P122
P130 P135
P121
Heating operation Cooling operation
Room T°
Cold
Proportional Band
Hot
Proportional Band
Heating setpoint
P152 or P153
Cooling setpoint
P150 or P151
Max. speed
Min. speed
Economy
The temperature is controlled according to the eco setpoint.
In HEATING mode, the shift will be downwards: i.e. comfort setpoint > eco setpoint
E.g.: HEATING setpoint in Comfort mode = 20°C → HEATING setpoint in ECO mode = 17°C.
In COOLING mode, the shift will be upwards: i.e. comfort setpoint < eco setpoint
E.g.: COOLING setpoint in Comfort mode = 24°C → COOLING setpoint in ECO mode = 27°C.
Frost protection
The frost protection function is validated in HEATING mode. In COOLING mode, it is automatically switched to ECONOMY mode.
An integral action must be entered into the parameters.
0 %
100 %
P 130
Valve ctrl
Frost protection mode
Hot
Proportional Band
P154: Frost protection
setpoint
Room T°

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5.2.2 Managing the 0-10 V output for valve control
5.2.2.1 Mixed, heating and cooling coil.
Used to set the control box's operating mode. This parameter only appears for mixed coils.
- WINTER. Heating and fan override.
- SUMMER. Cooling and fan override.
- AUTO. CHANGEOVER thermostat fitted to the coil's main water supply pipe.
It will automatically enable HEATING/COOLING mode, depending on the temperature of the fluid
The CHANGEOVER thermostat is fitted as standard on mixed coils.
- the CHANGEOVER contact is closed: COOLING mode
- the CHANGEOVER contact is open: HEATING mode
The symbols below will be displayed on the main page to show the current mode.
Cooling override Heating override Heating mode via changeover Cooling mode via changeover
5.2.2.2 Heating Coil, HEATING mode
"Stop" position: the valve is closed
"COMFORT" position: the 0-10 V signal will depend on the difference between the regulated temperature value (room) and the
setpoint. Regulation will only start after a 30-second time delay on the fan operation feedback contact. An integral action must be
entered into the parameters.
0 %
100 %
P 130
Valve ctrl
Heating operation
Hot
Proportional Band
P152 or P153
Setpoint
Room T°