AERMEC HRC User manual

21.07 – 5146801_00
Translation of Original instructions
www.aermec.com
Accessory manual
HRC
 CONTROL SYSTEM FOR RPLI RECOVERY UNITS

All specications are subject to change without prior notice. Although every eort has been made to ensure accuracy, Aermec shall not be held liable for any errors or
omissions.
This marking indicates that this product should not be disposed with other household wastes throughout the EU. To prevent possible harm to the envi-
ronment or human health from uncontrolled disposal of Waste Electrical and Electronic Equipment (WEEE), please return the device using appropriate
collection systems, or contact the retailer where the product was purchased. Please contact your local authority for further details. Illegal dumping of
the product by the user entails the application of administrative sanctions provided by law.
Dear customer,Thank you for choosing an Aermec product. It is the fruit of many years of experience and special design studies and has been made of the highest grade
materials and with cutting edge technology.In addition, all our products bear the CE mark indicating that they meet the requirements of the European Machine Direc-
tive regarding safety. The quality level is being constantly monitored, so Aermec products are synonymous with Safety, Quality and Reliability.The data may undergo
modications considered necessary for the improvement of the product, at any time and without the obligation for any notice thereof.
Thank you again.
Aermec S.p.A.

3
TABLE OF CONTENTS
1. General description...........................................................................p.4
HRC kit content.......................................................................................p.4
Electric box dimensions.......................................................................p.4
2. Connections ..........................................................................................p.5
Connection between Load control board and user panel
......................................................................................................................p.5
Control board Input/Output ..............................................................p.5
VMF-MOD board connection (accessory) .....................................p.7
Dip switch setting ..................................................................................p.8
Supervision serial ...................................................................................p.8
3. Operating mode .............................................................................. p.10
Auto Mode............................................................................................. p.10
Manual Mode........................................................................................ p.10
Aux Mode............................................................................................... p.10
4. Control logic....................................................................................... p.11
Anti-freeze through ow rate modulation................................. p.11
Anti-freeze through electric resistance....................................... p.12
Freecooling............................................................................................ p.12
Steriliser lamp....................................................................................... p.13
Post-treatment resistance................................................................ p.13
Post treatment coil.............................................................................. p.15
5. Interface use....................................................................................... p.17
Hardware structure............................................................................. p.17
Software structure .............................................................................. p.17
Main page .............................................................................................. p.18
Input fan power page........................................................................ p.19
Expulsion fan power page ............................................................... p.19
Password page ..................................................................................... p.19
USER menu ............................................................................................ p.20
INSTALLER Menu ................................................................................. p.21
AFTER-SALES ASSISTANCE Menu................................................... p.23
°C/°C change menu ............................................................................ p.25
Alarms signal......................................................................................... p.25

4
1 GENERAL DESCRIPTION
The HRC accessory kit meets the installation needs of the RPLi recovery units, ensuring the recovery unit the control of:
— Exchange of air charged with carbon dioxide and pollutants
— Inow of heat-treated fresh air (there must be no thermal shocks)
— Implement the free cooling bypass under favourable conditions.
— Contain the energy cost increase with the use of a system that recovers large part of the heat contained in the expelled air stream and transfers it to the fresh air.
— Double resistive load control to treat inow air
1.1 HRC KIT CONTENT
The accessory consists of a 300x380x120 mm plastic electric control board which ensures IP56 protection and so must be installed outside the recovery unit. The HRC accessory
contains all the components necessary for managing the heat recovery units:
— Electronic control board of the loads inserted in an IP56 protection rating plastic board
— No.4 6m long NTC temperature probes
— 4-pole serial cable + screen for connecting the control board to the system user interface
— User interface panel used in the Repuro recovery units which has an aesthetic equal to that of the VMF-E4
1.2 ELECTRIC BOX DIMENSIONS
300
380
396
316
128
2
49,5
6,5
120
124
251
331
Ø8

5
2 CONNECTIONS
2.1 CONNECTION BETWEEN LOAD CONTROL BOARD AND USER PANEL
RPLi HRC2 1
Connections:
1: Connection between user panel and load board, to be made with a 4-pole serial cable plus screen (22AWG) supplied;
2: Connection between load board and recovery unit, to be made according to connection needs, following the instructions provided in the next chapter.
Note: the connections from the terminal board (or possible VMF-MOD accessory board) can be 3m max.
2.2 CONTROL BOARD INPUT/OUTPUT
The following tables show the control board input/output: the input/output column indicates the input/output how it is called on the board wiring diagram, the Function
column indicates how the inputs and outputs are used on the various machines in which the board will be installed, the Electrical characteristics column shows the type of
electrical signal that characterises the input/output.
I/O Function Electrical characteristics
M2 L: board electric power supply input Voltage: 230 Vac, 10 A current
M1 N: board electric power supply input Voltage: 230 Vac, 10 A current
M3 GND: ground reference //
M4 AUX/RE: output for electric post-heating resistance control Voltage: 230 Vac, 10 A current
M5 Neutral reference Voltage: 230 Vac, 7 A current
M6 MA: output for freecooling bypass motor control Voltage: 230Vac, 5 A current
M7 Y2: output for electric post-heating resistance control (second stage) Voltage: 230 Vac, 5 A current
M8 Y1: output for pre heating resistance control Voltage: 230 Vac, 5 A current
M9 Neutral reference Voltage: 230 Vac, 10 A current
M10 Neutral reference Voltage: 230 Vac, 10 A current
M11 V3: output for purication device or output damper control Voltage: 230 Vac, 5 A current
M12 V2: output for VSL valve control (cooling only) Voltage: 230 Vac, 5 A current
M13 V1: output for VSL valve control (heating/cooling or heating only) Voltage: 230 Vac, 5 A current
M14 Support input, not connected //
M26 Service terminal board See gure 4
M22 Terminal board not used //
CN2 SW: SAEXIT water probe (if dip 2 OFF): probe of air expelled to the outside (if dip 2 ON) NTC 10Kohm
CN1 SAE: outdoor air probe NTC 10Kohm
CN3 SAM: probe of air introduced into the room NTC 10Kohm
M15, M16 SA: probe of air expelled from the room NTC 10Kohm
M17 Out 0-10V: reference for air inow inverter fan Voltage: 10 Vdc, 10 mA current
M18 Inverter reference GND Voltage: 10 Vdc, 10 mA current
M19 Out 0-10V: reference for air expulsion inverter fan Voltage: 10 Vdc, 10 mA current
M20 GND Voltage: 10 Vdc, 10 mA current
M21 Not used Voltage: 10 Vdc, 10 mA current
M25 VMF-MOD expansion connector //
M27,M28 MS: dierential pressure switch status input Voltage: 5Vdc, 0.5 mA current
NOTE: the M26 terminal board integrates dierent specications, for more details refer to the specic table on the next page.
M26 Terminal board specications:
CE GND CF A B GND
1 TX/RX 2 GND-TTL 3 MODE 4 V5 5 TX/RX 6
1 2 3 4 5 6GND
TTL

6
M26 - function inputs
Terminal Code Function
2 GND Common
3 CF Recovery unit enabling input
1 EC Functioning status forcing input
M26 - RS485 serial inputs
Terminal Code Function
4 A
RS485 serial inputs5 B
6 GND
M26 - User panel serial inputs
Terminal Code Function
1 TX/RX
Inputs for connection with user interface panel
2 GND-TTL
3 MODE
4 5V
M26 - TTL serial inputs
Terminal Code Function
5 TX/RX Connection inputs with TTL serial
6 GND

7
2.3 VMF-MOD BOARD CONNECTION (ACCESSORY)
For hydronic systems where a variable ow rate is required in the circuit that feeds the post-treatment coils, the RPLi recovery unit regulator can manage the modulating valves
thanks to the use of the VMF-MOD expansion (accessory).
M26
M28~PE2
SW1
vmf-mod
230Vac
Vout 1
GND
Vout 2
+24[V]
GND
DIP 2
DIP 1
VMF-MOD
Output name Type of installation Controlled valve
Vout 1 2-pipe system Cold / hot branch valve
4-pipe system Hot branch valve
Vout 2 2-pipe system No function
4-pipe system Cold branch valve
By setting dip switches 1 and 2 it is possible to select between two dierent functioning curves (for the hot branch and cold branch), as indicated in the following graphs:
100%
0%
3 [°C] TSAM - TSA
100%
TSA - TSAM
4[°C]
0%
Cooling
Heating
5 [°C]
6[°C]
DIP 1 = OFF
DIP 1 = ON
Heating:
DIP 2 = OFF
DIP 2 = ON
Cooling:

8
2.4 DIP SWITCH SETTING
The board has appropriate conguration dip-switches to meet possible installations. There are 8 microswitches with the following functions:
DIP Position Function
DIP 1 ON Post-treatment resistance presence
OFF Post-treatment resistance not present
DIP 2 ON Pre heating resistance presence
OFF Pre heating resistance not present
DIP 3 ON Post-treatment coil presence
OFF Post-treatment coil not present
DIP 4 ON Recovery unit with heating coil + cooling coil
OFF Recovery unit with heating/cooling coil
DIP 5 ON Freecooling through alternation of the air ow
OFF Freecooling through bypass damper
DIP 6 ON Freecooling dierential with 5°C hysteresis
OFF Freecooling dierential with 2°C hysteresis
DIP 7 ON Dierential pressure switches present
OFF Dierential pressure switches not present
DIP 8 ON Activation dierential according to 3°C electric load
OFF Activation dierential according to 2°C electric load
2.5 SUPERVISION SERIAL
This adjustment standard requires the management of the RS485 serial with which they can be connected as slave to a modbus network. The communication parameters are:
— Modbus RTU
— Baud Rate 19200 bit/s
— Stop bits 2
— No Parity
The following modbus data can be read/written by a supervision system:
LABEL DESCRIPTION CONTROLS VALUE UNIT TYPE ADD
0x03 0x10 MIN MAX
SA_BMS Value read by the room probe SI NO -200 900 °C/10 A 0
SW_BMS Value read by the external coil water probe SI NO -200 900 °C/10 A 1
SAM_BMS Value read by the inow air probe SI NO -200 900 °C/10 A 2
SAE_BMS Value read by the external air probe SI NO -200 900 °C/10 A 3
SINT_BMS Value read by the probe in the user interface SI NO -40 500 °C/10 A 4
SETC_BMS Cold adjustment setpoint value SI NO 80 330 °C/10 A 5
SETH_BMS Hot adjustment setpoint value SI NO 120 400 °C/10 A 6
STATO_BMS Machine status SI NO 0 1 // A 7
MODE_BMS Locally set functioning mode value SI NO 0 3 // A 8
POW1_BMS Fan 1 power SI NO 0 100 % A 9
POW2_BMS Fan 2 power SI NO 0 100 % A 10
ALARM_BMS Alarms found on the recovery unit + recovery unit status ag SI NO 0 8191 // D 11
DIP_BMS Dip_Switch Conguration SI NO 0 255 // D 12
DIGIN_BMS Status of digital inputs SI NO 0 255 // D 13
RELE_BMS Status of electronic board relays SI NO 0 255 // D 14
ENABLE_BMS Enabling from remote and data change ag NO SI 0 1 // D 15
MODER_BMS Remote forced mode value (1: MAN, 2:AUX, 3:AUTO) NO SI 1 3 // A 16
SEASON_BMS Remote forced season value NO SI 0 1 // A 17
SET_POW1_BMS Power set for fan 1 NO SI 0 100 % A 18
SET_POW2_BMS Power set for fan 2 NO SI 0 100 % A 19
SETPOINT_BMS Operating set point NO SI 80 500 °C/10 A 20
HH_FILTRO Operating hours of lters SI NO 0 10000 hours A 21
A: analogue data; D: digital data
The following table describes the digital modbus variables in detail:
LABEL BITS DEFINITION
B1 5 B1 4 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
ALARM_BM S NU NU NU FLAG_A
F
FLAG_F
C
FLAG_RXO
N
FLAG_FOR
Z
FLAG_VEN
T
ALL_X
X
ALL_F
3
ALL_F
2
ALL_S
A
ALL_SA
M
ALL_SA
E
ALL_DM
P
ALL_DM
F
DIP_BMS NU NU NU NU NU NU NU NU DIP7 DIP6 DIP5 DIP4 DIP3 DIP2 DIP1 DIP0
DIGIN_BMS NU NU NU NU NU NU NU NU NU FI FR FV SP PI EC CC
RELE_BMS NU NU NU NU NU NU NU NU RL6 RL5 RL4 RL3 RL2 RL1 RL0 RL1
ENABLE_BM S NU NU F_SE
TF_V2 F_V1 F_SEA F_M F_A NU NU NU NU NU NU NU ENABLE
Key:
NU bit not used
ALL_DMF freecooling bypass alarm presence bit
ALL_DMP antifreezer bypass alarm presence bit
ALL_SAE external air probe alarm presence bit
ALL_SAM inow air probe alarm presence bit
ALL_SA expelled air probe alarm presence bit

9
ALL_F2 F2 fuse alarm presence bit
ALL_F3 F3 fuse alarm presence bit
ALL_XX alarm presence bit to be dened
FLAG_VENT active ventilation presence bit
FLAG_FORZ forcing presence bit from BMS system
FLAG_RXON active resistance presence bit
FLAG_FC operating freecooling presence bit
FLAG_AF operating freecooling presence bit
DIP_i status (ON/OFF) of the ith dipswitch
RLi status (ON/OFF) of ith relay
CC freecooling bypass microswitch input status
CE external contact input status
PI JP1 input status
SP presence sensor input status
FV motor fuse status
FR resistance fuse status
FI anti-freeze bypass microswitch input status
ENABLE if 1: ON, 0:OFF
F_SET if 1: enable set forcing with SETPOINT_BMS data, 0: disable temperature set forcing
F_V2 if 1: enable parameter forcing with SET_POW1_BMS data, 0: disable inow fan speed forcing
F_V1 if 1: enable parameter forcing with SET_POW2_BMS data, 0: disable expulsion fan speed forcing
F_SEA if 1: enable season forcing with SEASON_BMS data, 0: disable season forcing
F_M if 1: enable functioning mode change with MODER_BMS data, 0: disable mode change
F_A if 1: remotely enable ON/OFF via ENABLE bit
Note: each data modication made by BMS is followed by the storage in eeprom of the value.

10
3 OPERATING MODE
3.1 AUTO MODE
This functioning mode involves the renewal of room air using the maximum ow rate of inow and expulsion fans. In order to activate this procedure the user must press the
Mode/Select key on the interface panel until the“AUTO” icon appears.
The duration of this function depends on the Ct parameters (cleaning time) settable from the user interface panel of the machine. When this time expires, the system goes back
to the functioning mode that was set prior to the room cleaning procedure.
3.2 MANUAL MODE
This functioning mode involves the activations of inow and expulsion fans according to the Po1 and Po2 parameters. In order to activate this procedure the user must press
the Mode/Select key on the interface panel until the“AUTO” and “AUX”icons appear.
The Po1 and Po2 parameters indicate a ow rate percentage (referred to the maximum of the installed fans) to be ensured in a one-hour functioning cycle. These parameters
can, therefore, be linked to the air renewal (moved air volume) that is to be ensured to the room.
The control will provide a constant functioning reference such as to ensure a constant instantaneous ow rate:
PISTx = Pox * PMAX
where
PISTx: inow or expulsion instantaneous ow rate
Pox: it can be Po1 or Po2 depending on whether it is the inow or expulsion fan
PMAX: maximum fan ow rate
3.3 AUX MODE
This functioning mode is entirely similar to manual mode, but allows the user to enable any resistive loads present in the machine for the anti-freeze function and production
of neutral air (the inow air temperature must tend to that of the expelled air). In order to activate this procedure the user must press the Mode/Select key on the interface
panel until the“AUX” icon appears

11
4 CONTROL LOGIC
The table below highlights the control logics enabled for each heat recovery unit functioning mode:
FUNCTION FUNCTIONING MODE
Auto Manual Aux
Anti-freeze through ow rate modulation x x x
Anti-freeze through electric resistance x
Freecooling x x
Steriliser lamp activation x x x
Coil control for air post-treatment x x x
Resistance control for air post-treatment x
Room air cleaning function x
CF contact ventilation forcing x x
4.1 ANTI-FREEZE THROUGH FLOW RATE MODULATION
During winter functioning, the recovery unit provides for the modulation of the air ow rate introduced so as to prevent the formation of frost in the exchanger and the exten-
sion of the operating limit up to -10 [°C] of outdoor air.
Outdoor Air
(fresh air)
Indoor air
(recovery)
Air expelled
(spoiled)
Air inlet
(delivery)
Outdoor sensor (SAE)
The fresh ow rate modulation is functionally linked to the TSAE according to the following relationships:
PI = Po1 * PMAX * Ci(T)
Where“Ci”is the correction of the inlet ow rate in relation to the outdoor air temperature (curve highlighted in the following paragraph)
0
10
20
30
40
50
60
70
80
90
100
-
15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0
T
SAE
Ci(T)

12
4.2 ANTI-FREEZE THROUGH ELECTRIC RESISTANCE
The heat recovery units that require the presence of the pre heating electric resistance (dip2: ON) can integrate the anti-freeze function seen previously, by activating the
electric load in relation to the outdoor air temperature and the functioning mode. As previously mentioned, the resistive electric loads can only be enabled during the AUX
functioning mode.
0 TSAE [°C]-1,0
OFF RXPRE
ON RXPRE
ANTIFREEZE WITH FLOW MODULATION
The previous gure shows the activation thresholds of the pre heating resistance.
To reduce overheating risks, the logic for switching on the resistance requires a post-ventilation time period in relation to its switch-o. The following gure shows these
timings.
VMIN
60”
VMIN
OFF
ONOFF
V≥VMIN
RE
Pre resistance
ventilation
Fan of
air intake
Ventilation logics in the presence of electric heaters
As shown in the diagram indicating the pre heating resistance activation thresholds, there are outdoor air temperature ranges in which the electric resistance is forced to OFF,
under these functioning conditions, the recovery unit anti-freeze is equally ensured through the modulation of the input air ow rate. Therefore, this control is disabled with
the activation of the RXPRE.
RXPRE is disabled if the expelled air temperature (read through CN2: SW input) exceeds 5°C to comply with PHI certication.
4.3 FREECOOLING
The regulation logic provides for the cooling function through the input of untreated outdoor air, this function can be carried out in two dierent ways depending on the
customer needs and can be selected via dip 5.
— DIP 5 at ON => freecooling through air input and ejection cycles
— DIP 5 at OFF => freecooling by opening the freecooling bypass damper
For the freecooling function to activate, the regulation must instantly control the 3 variables:
— ROOM TSET: room set
— TSAE: outdoor air temperature
— TAMBIENTE: room temperature
If the indoor temperatures exceed the set and, if the TSAE is lower than the TSET, the recovery unit tends to restore the conditions wanted by the user through the inlet of
untreated outdoor air, to meet this requirement the control board provides for:
1. (DIP 5 at ON) alternating functioning cycles of the input and ejection fans. The functioning period of the fans can be 20/40 minutes and can be selected through the BPF
parameter.
2. (DIP 5 at OFF) activation of the freecooling bypass damper

13
TSAE
T
T
Freecooling ON
Freecooling OFF
F
AN_ESP ON
FAN_IMM ON
TSAE
T
Freecooling ON
Freecooling OFF
T
AMBIENTE
Adjustment
band
SET AMBIENTE
time
time
Bypass period
Freecoling differential (DIP6)
AMBIENTE
time
Freecoling differential (DIP6)
Freecooling bypass damper open
Freecooling with DIP5 in ON
Freecooling con DIP5 in OFF
Freecooling bypass operation
Adjustment
band
SET AMBIENTE
4.4 STERILISER LAMP
The plasmacluster accessory is turned on when the input fan is activated to ensure sanitising of the air owing into the environment.
4.5 POST-TREATMENT RESISTANCE
The post-treatment resistance (dip 1: On) can be used by the recovery unit during winter functioning to further treat the air introduced into the room to avoid unwanted
cooling phenomena.

14
TSAM
TSA
TPAN_UI
TPAN_UI
2°C
Ambient air probe SA
Air probe introduced into the SAM environment
Ambient air probe
located in the
UI panel
Time
Time
TemperatureTemperature
Resistor ignition delay (60s)
ZONE OF NON-ENABLING OF
THE REHEATING RESISTANCE
Resistance switch-off delay
Enabling the post ventilation resistance
Logic for adjusting the post-ventilation resistance
To enable the functioning of the post ventilation resistance, the user must work on the user interface panel by setting the AUX mode.The electronic board veries the presence
of any post treatment coil of the air and performs the following check:
— if DIP3 = ON → enable the RXPOST if there are insucient water conditions
— if DIP3 = OFF→no condition in relation to the water state
This inspection is intended to make the recovery unit use the heat source with greater thermal eciency.
The control, when possible, tries to introduce “neutral air” into the room, keeping the TSAM value close to the TSA value. The constraint to be observed concerns the TSA tem-
perature which must not exceed the room setpoint value. This forcing is dictated by the principle that the post ventilation resistance must not be used to heat the rooms and
by a safety device in the control that tries to avoid continuous “tracking”of the TSA.
It should be noted that even in this functioning mode, the activation logic of the post-treatment resistance requires a post ventilation phase in relation to its deactivation.
To control the post-treatment resistive load, the regulator will be able to control the activation of the two electric loads in order to modulate the supplied heating capacity. The
activation of the electric loads follows the logic described in the following gure:

15
DIP 8 OFF: 2 °C
DIP 8 ON: 3 °C
TSA
2 °C
T
SAM
ACTIVE RESISTIVE
SECOND STAGE
ACTIVE RESISTIVE
FIRST STAGE
4.6 POST TREATMENT COIL
They can be used by the recovery unit through the post-treatment coils to treat hot/cold air ensuring the introduction of neutral air inside the rooms to be cooled.
SA
SAE
SAM
SW(1)
SA
SAE
SAM
SW(1)
Air allowed
into the
environment
RECOVERER
Air drawn in from
the external
environment
Air drawn in from the
internal environment
Air expelled
COLD POST TREATMENT BATTERY
RECOVERER
(1) It detects the battery temperature if
dip 2 is OFF, that is, we are in the
absence of air pre-treatment resistance.
(1) It detects the battery temperature if dip 2
is OFF, that is, we are in the absence of
air pre-treatment resistance.
example of installation with two post treatment batteries
example of installation with a single post treatment battery
Air drawn in from
the external
environment
Air drawn in from the
internal environment
Air expelled
The above gures show the two possible solutions for managing the fresh air, where:

16
— DIP3 ON and DIP4 ON → internal coil for heating and external coil for cooling (the water probe must be placed in the internal coil piping and will perform the sole function
of controlling the minimum water temperature)
— DIP3 ON and DIP4 OFF → internal coil for heating and cooling (the water probe must be placed in the internal coil piping and will perform the function of controlling the
minimum and maximum water temperature).
The regulator tries to introduce“neutral air”into the room, keeping the TSAM value close to the TSA value in both seasons of functioning. Even with the use of post-treatment
coil, the condition of“neutral air input”must be observed. The recovery unit must only be used to treat the air (exchange) and not for cooling the rooms.
The activation of the coil valve follows the logic described in the previous gure.
tSA
tSAM
0.5 °C
tSA
tSAM
tSA
tSAM
tSA
tSAM
0.5 °C
TSA < TSET TSA > TSET
ON
ON
OFF OFF
OFF
control logic of the post treatment coil valve
To avoid using the post-treatment coil ineciently, especially during winter functioning, the recovery unit controls the temperature of the water upstream of the valve accord-
ing to the logic described in the previous gure.
22°C17°C35°C31°CtSW °C
Enable to
run hot
Post treatment
coil disabled
Enabled to
run cold
Regulating logic of the post treatment coil valve
During winter functioning, the system provides for an anti-freeze control of the post-treatment coil in relation to the temperature detected by the SAM probe:
tSAM < 5 °C → recovery unit ventilation block for 10 minutes.
t [min]
tSAM
5 °C
stop ventilation
for 10 minutes
stop ventilation for
10 minutes
ventilation cycles in anti-freeze conditions

17
5 INTERFACE USE
5.1 HARDWARE STRUCTURE
The user interface has a monochromatic display and 4 capacitive keys. From this interface one can:
— Set the functioning mode
— Set the functioning parameters
— View the reading of all the installed probes
— Activate the manual forcing of the electric loads to simplify any troubleshooting
On / Off of the recuperator
Change way
Enable data modification
Confirm data modification
Change page UP
Increment given
Change page DOWN
Decrease given
5.2 SOFTWARE STRUCTURE

18
5.3 MAIN PAGE
The main page of the user interface provides essential information on the recovery unit functioning. The following images show all the possible displays on the main page.
Temperature detected
by the probe on the interface
Indication of recuperator
off by ON / OFF key
If the icon is on, it means that
we are in the presence of a
supervision system
Icon indicating the
operating season
Icon active when a resistive
electrical load is on
Icon active during manual
operation with enabling of
auxiliary loads
Icon active during room
cleaning operation
Icon that indicates the activation
of the operation of at least one fan
String that identifies the
presence of an alarm in
the system
Existing alarm code
Possible views of the Main Page in the presence of an alarm
VSL valve active indication
(post treatment coil valve)
Possible views of the Main Page
The list of alarms reported by the user interface is indicated in the“Alarms signal”section. Below is a table that identies other possible signals that may appear during normal
functioning:
Meaning of the indication
Fixed No present Winter function
Flashing No present Anti-freeze
Fixed Flashing Winter function + open freecooling bypass
No present Fixed Summer function
No present Flashing Summer function + open freecooling bypass

19
5.4 INPUT FAN POWER PAGE
This parameter identies the functioning power (expressed as a percentage) of the input fan during the Manual and AUX functioning mode.
To enter the modication mode, press the key (the entire data modication phase is highlighted by the ashing of the icon ), change the value using the keys
o and conrm the selection by pressing
Bargraph of the power
of the supply fan
(min 1 spet, max 20 steps)
5.5 EXPULSION FAN POWER PAGE
This parameter identies the functioning power (expressed as a percentage) of the expulsion fan during the Manual and AUX functioning mode.
To enter the modication mode, press the key (the entire data modication phase is highlighted by the ashing of the icon ), change the value using the keys o
and conrm the selection by pressing
Bargraph of the power of the
expulsion fan (min 1 spet,
max 20 steps)
5.6 PASSWORD PAGE
The user can access the submenu parameters through the password setting (see gure below)

20
PASS: 0 PASS: 3 PASS: 11 PASS: 1
USER
menu
INSTALLER
menu
ASSISTANCE
menu
°C/°F CHOICE
menu
Note:
to modify all the parameters present in the user interface rmware, simply follow the sequence of operations shown in the gure:
Activate data
modification mode
Set value Confirm data
5.7 USER MENU
5.7.1 SEA Parameter
This parameter is used to select the functioning season of the heat recovery unit.
Where:
— SEA = 0 → Summer functioning
— SEA = 1 → Winter functioning
5.7.2 SPH Parameter
This parameter represents the room temperature set desired in the rooms during the winter functioning. This data is used in the function that manages the activation of the
post-treatment resistance.