S&P CADB-HE BASIC Series User manual

CADB/THE BASIC
Heat recovery unit with integrated control
EN

2
INDEX
1. INTRODUCTION .............................................................................................................................................................3
2. SAFETY REGULATIONS AND “CE” MARKING ...............................................................................................................3
3. GENERAL INSTRUCTIONS ............................................................................................................................................3
4. UNIT LABELLING ..........................................................................................................................................................3
5. HANDLING ...................................................................................................................................................................4
6. INSTALLATION ..............................................................................................................................................................5
6.1. Introduction.............................................................................................................................................................5
6.1.1. Outdoor installation ......................................................................................................................................9
6.2. Dimensions and free space for maintenance ......................................................................................................10
6.3. Mounting process of an additional supply filter...................................................................................................13
6.4. Range specifications.............................................................................................................................................13
6.5. Connections ..........................................................................................................................................................13
6.5.1. Piping and duct connections.......................................................................................................................13
6.5.2. Condensate drainage..................................................................................................................................13
6.5.3. Electrical connection ..................................................................................................................................14
6.5.3.1. External Touch Display (ETD) control connection .........................................................................14
6.6. Configurations ......................................................................................................................................................15
7. CONTROL FUNCTIONS................................................................................................................................................16
8. CONTROL SCHEMES ...................................................................................................................................................17
9. CONTROL BASIC OPERATION ....................................................................................................................................17
9.1. Description ...........................................................................................................................................................17
9.2. Main functions ......................................................................................................................................................17
9.2.1. Via the remote terminal supplied with the unit..........................................................................................17
9.2.2. Through integration to Modbus network (external BMS)...........................................................................18
9.3. Use of remote terminal - user level.....................................................................................................................18
9.3.1. Fan speed selection (Start / Stop / Speed adjustment)..............................................................................18
9.3.2. Free-cooling function setting .....................................................................................................................19
9.3.3. Setting the by-pass pass temperature in free-cooling mode....................................................................20
9.4. Advanced parameters configuration ....................................................................................................................20
9.4.1. Modification of predefined speeds..............................................................................................................21
9.4.2. Modification of the bypass opening setpoint (free-cooling mode).............................................................22
9.4.3. Fan selection that acts as a master (only available on units controlled via Modbus in COP mode) .........23
9.4.4. Operation at Variable Airflow (VAV) mode, depending on an external sensor
(CO2, temperature or relative humidity) .....................................................................................................23
9.4.5. Filter supervision........................................................................................................................................24
9.4.6. Fan status monitoring.................................................................................................................................24
9.4.7. Boost function - Forced High Speed (only available in models 04 to 27)...................................................25
9.4.8. Remote Stop-Start......................................................................................................................................25
9.4.9. Protection of heat exchanger unit ..............................................................................................................25
10. BUILDING MANAGEMENT SYSTEM (BMS) CONNECTION ........................................................................................26
11. INSPECTION, MAINTENANCE AND CLEANING..........................................................................................................32
11.1. Replacement of filters ........................................................................................................................................32
11.2. Filter installation ................................................................................................................................................33
11.3. Heat exchanger...................................................................................................................................................34
11.4. Condensation drainpipe......................................................................................................................................35
12. OPERATION ANOMALIES ...........................................................................................................................................36
12.1. General anomalies..............................................................................................................................................36
12.2. List of alarms......................................................................................................................................................36
13. WIRING DIAGRAMS.....................................................................................................................................................38
13.1. Models CADB-HE-D 04 to 27 BASIC...................................................................................................................38
13.2. Models CADB-HE-D 33 to 100 BASIC.................................................................................................................39
ENGLISH

3
1. INTRODUCTION
Thank you for purchasing this appliance. It has been manufactured in full compliance with applicable
safety regulations and EU standards.
Please read this instruction book carefully, as it contains important information for your safety during
the installation, use and maintenance of this product.
Keep it at hand for future reference.
Please check that the appliance is in perfect condition when you unpack it, as all factory defects are
covered by the S&P guarantee.
2. SAFETY REGULATIONS AND “CE” MARKING
S&P technicians are firmly committed to research and development of ever more efficient products and
in compliance with current safety regulations.
The instructions and recommendations given below reflect current regulations, principally regarding
safety, and therefore are based on compliance with general regulations. Therefore, we recommend all
people exposed to hazards to strictly follow the safety regulations in force in your country. S&P will not
be held liable for any possible harm or damage caused by non-compliance with the safety regulations,
as well as caused by modifying the product.
The CE mark and the corresponding declaration of conformity are proof of the product’s conformity with
current EU regulations.
3. GENERAL INSTRUCTIONS
A hazard analysis of the product has been carried out as provided in the Machine Directive. This manual
contains information for all personnel exposed to these hazards, with the aim of preventing possible
harm or damage due to faulty handling or maintenance.
All maintenance operations (ordinary and extraordinary) must be carried out with the machine switched
off and the electrical power supply disconnected.
To avoid a possible accidental start up, place a warning notice on the electrical control panel with the
following text:
“Attention: control disconnected for maintenance operations”
Before connecting the power supply cable to the terminal strip, make sure the mains voltage corres-
ponds to the voltage indicated on the specifications plate of the unit.
Regularly check the product labels. If, due to the passing of time, they are no longer legible, they must
be replaced.
4. UNIT LABELLING
The machine may come with several pictograms that must not be removed. These signs are divided into:
• Prohibition signs: Do not repair or adjust when in operation.
• Danger signs: Warning of the presence of live elements inside the container bearing the sign.
• Identification signs: CE card, indicating product information and manufacturer’s address. The CE
mark indicates the product’s conformity with EEC standards.
Danger signs Prohibition signs

4
5. HANDLING
The CADB/T-HE models 04 to 33 are delivered fixed with screws to the pallets.
The models 45 to 100 are equipped with a bed, due to its weight are supplied without pallets. The unit
can be handled by a pallet transporter, a forklift, or a crane.
The handling machines will be adapted to the load and the lifting conditions. In all cases, the lifting will
be done at the device’s base. The centre of gravity is located at the centre of the unit. The device must be
carefully manipulated only in the horizontal position.
Models 04 to 33
Models 45 to 100

5
6. INSTALLATION
6.1. INTRODUCTION
Horizontal models size 04, 08, 12, 16, 21, 27 and 33
These models are designed to be installed hanging from the ceiling or located behind a false ceiling.
When installing the unit, is mandatory to distribute the unit weight between all the supports existing in
the units:
• CADB-HE 04: 4 supports (one in each corner)
• CADB/T-HE 08 to 33: 6 supports (one in each corner and 2 centered in each side)
Using studded rods (Ø 8 mm), it can be secured to the ceiling and levelled.
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16 994 1988 1278
21 1169 2338 1678
27 1169 2338 1678
33 1169 2338 1678
The model 04 does not have central support
The installer must ensure that the ceiling structure and the securing elements can bear the weight of
the device, taking into account that it is a dynamic load.
To prevent the transmission of vibrations from the unit to the rest of the installation, it is necessary
that the installer use specific isolation elements, such as antivibration devices in the supports, flexible
sleeves between the unit and the ducts, and flexible couplings between the water connections and the
pipelines.
Model Weight (kg)
4147
8183
12 190
16 235
21 333
27 370
33 420

6
Vertical models
The models size 4 to 27 are supplied with support feets, while the models size 45 and 60 are supplied
with a perimetral bed. This bed must be in contact with the ground or with a flat surface. It is essential
that the weight of the equipment was distributed between all points of support to prevent unit defor-
mation.
The installer must make sure that the ceiling structure and the securing elements can bear the
weight of the unit, taking into account that it is a dynamic load.
Models 04 to 33
Model Weight (kg)
4149
8185
12 192
16 237
21 335
27 372
33 422
Models 45 to 100
Model Weight (kg)
45 597
60 730
100 862
Horizontal models of sizes 45 and 60
IMPORTANT!
Particularities in the installation of horizontal versions LH and RH
For a correct evacuation of condensation generated into the heat exchanger, it is necessary to install the
unit with a minimum slope of 3º to the side where the extraction fan is placed:

7
SUPPLY FAN EXHAUST FAN
Horizontal models size 45 and 60 are supplied with a perimetral bed. This bed must be in contact with
the ground or with a flat surface. It is essential that the weight of the equipment was distributed between
all points of support to prevent unit deformation.
The installer must make sure that the ceiling structure and the securing elements can bear the
weight of the unit, taking into account that it is a dynamic load.
Model Weight (kg)
45 597
60 730
For all configurations
Once secured the device in correct position, the installer have to perform the connection to the air duc-
ting system, connection to the electric net, and in the case of versions with water coil, the connection
with closed circuit of hot water coil.
Inside of the unit are supplied the following accessories:
Drain**
a)
b) c)
x2 x2 x2 x1
Cable
(10 m)
Manual
Remote terminal*
x1 x1
* The remote controller is located inside the electric cabinet.
** In the models 45, 60 and 100 the drain is installed by default in the unit.

8
The drain is composed by 3 pieces:
a) Drain pipe
b) Female screw
c) Joint ring.
Install the two drains as indicated in the following drawing:
a) Horizontal versions of CADB/T HE 04 to 33
b) Horizontal versions of CADT-HE 45 and 60
c) Vertical versions of CADB/T HE 04 to 33

9
d) Vertical versions of CADT-HE 45 to 100
In these versions, the drainpipe and the siphon are supplied mounted in the unit.
6.1.1. Outdoor installation
Whenever possible, it is advisable to be mounted indoors. When it is installed outdoors,it is prefe-
rable to place the unit under a cover which offers enough protection to prevent rain falling directly
to the unit, or install the corresponding rain canopy (TPP accessory). Due to its design and the
position of its registers, it is preferable to use vertical versions (LV / RV) for outdoor installation.
In addition, these versions have feet that allow direct placement on the ground.
In horizontal version, models 04 to 33, ensure the sufficient space below the unit, to install a
siphons in the drain pipe.
If installed on the ground, sufficient space must be guaranteed under the unit so that it is possible
to install the corresponding siphons in the condensate outlets of the unit.
Drain pipe connexion
There is a Kit composed of 6 feet 5407067200 - KIT PIES CADB-HE, which facilitates the assem-
bly on floor of these versions:
2x Central supports
4x Corner supports
Detail of a CADB-HE 04 to 33 after the assembly of the KIT PIES CADB-HE

10
Both in the case that the Kit feet is used, or if the unit is based on antivibration pads, it is essential
that the unit support was guaranteed on the 6 existing supporting points being all of them at a
same plane.
In the case of not supporting the unit on the central supports it is possible that deformation in the
structure of the unit could take place, making it impossible to disassemble the panels.
Suitable rain protection canopy, according to the heat recovery unit model:
Heat recovery unit model Rain protection cowl model
Horizontal (LH / RH) Vertical (LV / RV)
CADB-HE-D 04 TPP-HE-H 04 TPP-HE-V 04
CADB-HE-D 08 TPP-HE-H 08 TPP-HE-V 08
CADB-HE-D 12 TPP-HE-H 12 TPP-HE-V 12
CADB-HE-D 16 TPP-HE-H 16 TPP-HE-V 16
CADB-HE-D 21 TPP-HE-H 21-27-33 TPP-HE-V 21-27
CADB-HE-D 27 TPP-HE-H 21-27-33 TPP-HE-V 21-27
CADT-HE-D 33 TPP-HE-H 21-27-33 TPP-HE-V 33
CADT-HE-D 45 TPP-HE-H 45 TPP-HE-V 45
CADT-HE-D 60 TPP-HE-H 60 TPP-HE-V 60
CADT-HE-D 100 – TPP-HE-V 100
Risk of condensation inside the unit
In winter, during the night or during periods of prolonged unit stoppage, it is possible that con-
densations appear on some internal surfaces of the unit, as well as inside the electrical cabinet.
a) Install isolation dampers in air inlet and air outlet.
b) Add anticondensation devices in the electrical cabinet as: cabinet heating elements that pre-
vent condensation formation on cabinet surfaces and electronic components.
6.2. DIMENSIONS AND FREE SPACE FOR MAINTENANCE
a) Horizontal versions of CADB/T HE 04 to 33 (False ceiling installation)
Distances for maintenance in installations with access from the lateral panels
Conf. LH
Conf. RH
Access to control panel and fans
Access to filters and heat exchanger

11
Distances for maintenance in installations with access from the bottom panels
Conf. RH
L
Conf. LH
Access to control panel and fans Access to heat exchanger
Access to filters and heat exchanger Access to filters and fan
Distances for false ceiling installation
Model W H L A B C D Ø E F Weight
(kg)
04 760 375 1520 400 400 700 350 200 400 920 147
08 910 425 1750 450 400 860 400 250 400 950 183
12 1050 425 1700 500 400 1000 400 315 500 900 190
16 1240 450 1950 600 500 1190 425 315 500 1150 235
21/27 1640 550 2300 800 700 1590 525 400 700 1300 333
33 1640 650 2300 800 700 1590 625 400 700 1300 420
b) Horizontal versions of CADB/T HE 45 and 60 (Floor installation)
Conf. LH
Conf. RH
Access to control panel and fans
Access to filters and heat exchanger
Floor installation
Model W H L A B C D Weight
(kg)
45 1500 1200 2100 400 600 400 600 597
60 1550 1580 2250 400 750 500 700 730

12
c) Vertical versions of CADB/T HE 04 to 33
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Access to control panel and fans
Access to filters and heat exchanger
Model W H L A B Ø Weight
(kg)
4540 920 1125 400 400 200 149
8610 1020 1275 400 400 250 185
12 770 1020 1325 400 400 315 192
16 770 1070 1475 400 400 315 237
21 970 1270 1750 400 500 400 335
27 970 1270 1750 400 500 400 372
33 1170 1270 1750 400 500 400 412
d) Vertical versions of 45, 60 and 100
Conf. LV
Conf. RV
Access to filters and heat exchanger
Access to control panel and fans
Model W H L A B C D Weight
(kg)
45 1120 1580 2100 400 1100 600 400 597
60 1500 1630 2250 400 1450 700 500 730
100 2050 1630 2250 600 2000 1100 650 862

13
6.3. MOUNTING PROCESS OF AN ADDITIONAL SUPPLY FILTER
The heat recovery unit is supplied with the filters already installed. F7 (ePM1 70%) in supply side and M5
(ePM10 50%) in extract side. In addition, it is possible to mount a second filter in the unit (accessory).
(For more information see section “Replacement of filters”).
6.4. RANGE SPECIFICATIONS
Model Complete unit Fan Weight
(kg)
Air
connections
diameter
(mm)
Nominal
airflow
(m3/h)
Efficiency*
(%) Electrical supply Max. abs.
power
(kW)
Maximum
current
(A)
Speed
(r.p.m.) Maximum current
(A)
CADB-HE D 04 BASIC 200 450 87 1/230V, 50Hz 0,2 2,2 3700 0,95 147
CADB-HE D 08 BASIC 250 800 86,4 1/230V, 50Hz 0,4 2,9 2650 1,3 183
CADB-HE D 12 BASIC 315 1.200 85,3 1/230V, 50Hz 0,95 3,5 2550 1,6 190
CADB-HE D 16 BASIC 315 1.600 85,5 1/230V, 50Hz 0,95 4,3 2845 2,0 235
CADB-HE D 21 BASIC 400 2.100 86,7 1/230V, 50Hz 0,9 4,7 1580 2,2 333
CADB-HE D 27 BASIC 400 2.700 83,8 1/230V, 50Hz 1,84 7,5 2450 3,6 367
CADT-HE D 33 BASIC 400 3.300 85,9 3+N/400V, 50Hz 2,2 4,3 2600 2,0 420
CADT-HE D 45 BASIC 600x400 4.500 86,3 3+N/400V, 50Hz 4,43 6,3 2200 3,0 597
CADT-HE D 60 BASIC 700x500 6.100 86,7 3+N/400V, 50Hz 4,43 6,3 2200 3,0 730
CADT-HE D 100 BASIC 1100x610 10.000 88,9 3+N/400V, 50Hz 8,13 11,9 2160 5,8 862
*
Wet efficiency referred to nominal airflow, Outdoor conditions (
-
5
º
C / 80% RH) and indoor (20
º
C / 50% RH)
6.5. CONNECTIONS
6.5.1. Connection with air duct
The fans are always blowing out with regard to the machine. Before making the connection of
air lines, consider the existing identification labels in each inlet/outlet of the heat recovery unit.
Outdoor air
Aire exterior
Aria di rinnovo
Air neur
Aussenluft
Extract air
Aire de extracción
Estrazione dal locale
Air repris
Abluft
Exhaust air
Aire de expulsión
Espulsione all esterno
Air rejeté
Fortluft
Supply air
Aire de impulsión
Inmissione
Air Soufflé
Zuluft
6.5.2. Condensate drainage
The units are supplied with 2 drains (one for each circuit). For added security it has to connect two
drains to the condensate discharge pipe. This connection must be made through a pipe of 22 mm
of inner diameter and a flange for secure fixation.
Drainage system
• To ensure the removal of draining condensate from the tray a siphon must be installed with
pressure head difference in mmWG greater than the pressure provided by the fan.
• The horizontal sections should have a minimum slope of 2%.

14
Condensation connection
6.5.3. Electrical connection
In the recovery unit CADB/T-HE BASIC range, all components integrated into the device, are
supplied into the electrical panel (motors, pressure filters, motor pressure switches, temperature
sensors and by-pass damper).
The electrical connection is limited to the connection of control terminal (10 m. of supplied cable)
and possible electrical accessories as such as CO2sensors and finally the connection of the power
supply line.
Make electrical connection in accordance to the described in the corresponding wiring diagram,
found at the end of this manual.
6.5.3.1. External Touch Display (ETD) control connection
The remote control is supplied with a 10 meter long cable, and it can be replaced by a cable up to
50 meters (minimum control cable type. H05VV-F-4G 0.25). The connection between the control
and the control board must be carried out according to the following scheme:
The ETD control has an electrical protection IP-20 degree, so it is valid; it is reserved exclusively
for an indoor usage sheltered from moisture.
In case of an outdoor mounting of the CADB/T-HE unit OI, you can also leave it inside the housing
of the electrical box. Once the parameter setting is done, the remote control can be disconnected.
Placement of the support and the remote control:
30104
80
60
65
4
The integration in Modbus networks and the use of the remote controller are not compatible.
The wiring of the RS-485 net is connected at the same terminals used for the remote hand ter-
minal plug.

15
6.6. CONFIGURATIONS
CADB/T-HE BASIC standard configuration
From these configurations there are multiple variables that can be performed by the professional ins-
taller quickly and easily.
Panel replacement process
The CADB-HE heat recovery units are available in two configurations LH and RH in the horizontal mo-
dels and LV, RV in vertical models.
Horizontal
Factory configuration
LH
RH
Examples of some of the configurations that is possible to obtain from
factory configuration
EXHAUST AIR FRESH AIR
Vertical
Factory configuration
LV
Examples of some of the configurations that is possible to obtain from
factory configuration
RV
EXHAUST AIR FRESH AIR

16
7. CONTROL FUNCTIONS
MAIN ELEMENTS
Control panel includes:
General switch
Electric box including control and wiring components, with access from side panel.
FUNCTIONS
Airflow adjustments
Manual fans speed adjustment
Automatic fans speed adjustment in VAV mode. Fans adjust their speed from the signal measured by an external
sensor (CO2, Relative humidity or Temperature)
Automatic speed adjustment of the fans in COP mode (Constant Pressure). Fans adjust their speed to maintain a
constant pressure in the duct net. It is necessary to install an external TDP sensor (accessory)
BOOST function (Forced speed preset via external power free contact) (available just in models 04 to 27)
ON/OFF function (Remote ON/OFF via external power free contact)
Temperature regulation
Temperature probes integrated within the unit (supply, extract, inlet and outlet)
Bypass adjustments
Manual actuation of bypass
Automatic actuation of bypass function free-cooling/ free-heating and heat exchanger anti-freezing protection
SECURITY FUNCTIONS
Control of polluted filters via pressure switches (included)
Alarm display in remote control
Fault detection in temperature probes
Fault detection in fan via pressure switches (included)
Anti-frost protection of heat exchanger via bypass activation.
COMMUNICATION
Remote wiring control
ON/OFF remote digital input via external power free contact.
Alarm digital output via power free contact.
Modbus RTU (RS-485)

17
8. CONTROL SCHEMES
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SF Supply fan HE High-efficiency heat exchanger
EF Extract fan RT Remote control panel
S1 Supply temperature probe F7 Supply filter
S2 Outdoor temperature probe M5 Extract filter
S3 Extract temperature probe MBypass actuator
S4 Exhaust temperature probe SCO2 CO2 sensor (accessory)
FCD Polluted filters detector (pressure switch) TDP Pressure sensor TDP-S (accessory. Exclusively for use in
case of Modbus integration)
FFD Fan Failure Detector (fan relay)
9. CONTROL BASIC OPERATION
9.1. DESCRIPTION
The control BASIC is a Plug & Play control factory mounted and wired that allows the management and
supervision of heat recovery units of the series CADB/T-HE-D without heating/cooling coils.
9.2. MAIN FUNCTIONS
The BASIC controller allows the management of the following functions:
9.2.1. Via the remote terminal supplied with the unit
FUNCTIONALITY
Manual fans speed adjustment
Automatic fans speed adjustment in VAV mode. Fans adjust their speed from the signal measured by an external
sensor (CO2, Relative humidity or Temperature)
Remote stop / start of the unit via external contact (Free of voltage)
BOOST function: Forced preset speed via external contact free of voltage. Only available for models 04 to 27
Bypass damper management
Heat exchanger anti-freezing protection
Alarm display in remote control
Control of polluted filters via pressure switches (included)
Control of fans status / failure
Modbus RTU communication

18
9.2.2. Through integration to Modbus network (external BMS)
Integration into Modbus networks is incompatible with the use of the remote control. In addition to all-
functionality available through the remote control, through the map of modbus registers it is possible to
obtain the following functionalities and information:
FUNCTIONALITY
Automatic fan speed adjustment in COP (Constant Pressure) mode. Fans vary their speed to maintain a constant
pressure in the ductwork. It is necessary to install an external TDP sensor.
Visualization of functional parameters of the unit, including:
- Outside air temperature
- Supply temperature
- Inside air temperature
- Outside air expulsion temperature
- Current fan speed
- Detailed information alarms
9.3. USE OF REMOTE TERMINAL  USER LEVEL
Using the three buttons on the remote terminal, simple operation settings can be done, as well as obtain
information on its operating status.
Function of the buttons:
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by-pass mode selection manual/automatic
Bypass pass temperature setting (free-cooling mode)
Start / Stop / Speed Adjustment
9.3.1. Fan speed selection (Start / Stop / Speed adjustment)
Pressing the button both fans start running, the fans increase progressively its speed until reaching
the LOW setpoint speed. Through successive pulsations it is possible to change the fans speed.
The control of this operation mode will be carried out by means of the button of speed selection, fo-
llowing the sequence:
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MEDIUM
speed
LOW
speed
Unit
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LOW
speed
Unit
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MEDIUM
speed
AUTO
mode
Previously
configured

19
The colour of the speed button lights up depending on the selected speed:
Speed Default value* 0-10V signal Led colour
LOW 3,5 V Green
MEDIUM 6 V Orange
HIGH 9,5 V Red
AUTO - Flashing green
* The set speeds are modifiable (See chapter Control settings).
9.3.2. Free-cooling function setting
The heat recovery units of the CADB / T-HE BASIC range are equipped with a by-pass damper that,
when opened, allows outside air to be introduced in the building without being heated / cooled in the
heat exchanger. (Being a partial bypass a small percentage of air continues to pass through the heat
exchanger).
The BASIC controller manages the by-pass damper based on the temperatures measured by the 4 tem-
perature probes in the unit.
The opening of the bypass occurs under the following conditions:
1. Forced manual opening from the remote controller
2. Free-cooling function, with the bypass being in Automatic mode, if there is cooling demand:
• Setpoint temperature < Supply air temperature
• Outdoor temperature < Supply air temperature
• Outdoor temperature > 12ºC
3. Free-cooling function, with the bypass being in Automatic mode, if there is heating demand:
• Setpoint temperature < Supply air temperature
• Outdoor temperature > Supply air temperature
• Outdoor temperature < 30ºC
4. Frost exchanger protection function. In winter conditions, when there is risk of freezing the conden-
sates inside the heat exchanger, the bypass is opened as the last action of the defrost strategy. Pre-
viously, the fan speed is reduced until it reaches the minimum speed.
By pressing on the “bypass” button, the bypass status is modified, being selectable the following posi-
tions:
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CLOSED
By-pass
OPEN
By-pass
AUTO
By-pass
AUTO
By-pass state Led colour*
Manually opened Green
Manually closed Orange
Automatic mode Off
* If there are active alarms, the free-cooling led will light up alternately showing both the status of the display and the number of the
alarm. The bypass status will be displayed 3 seconds with the corresponding LED color (green or orange) and the corresponding
sequence of each alarm.
When the bypass is activated manually, it will always have priority over the automatic and will remain in
the indicated state for 8 hours.

20
Operation in automatic mode
The free-cooling / free-heating mode is programmed with the following algorithm: The lower tempera-
ture limit of the TODA probe is a minimum of 12ºC, below this temperature the bypass operation does not
happens in order to avoid discomfort due to the entry of air excessively cold.
9.3.3. Setting the by-pass pass temperature in free-cooling mode
Pressing on the button modifies the setpoint temperature value of the by-pass. Below this temperatu-
re, whenever there is a demand for cooling in the building, the by-pass damper will be opened:
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temp
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temp
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temp
Temperature Default value* Led colour
High 13ºC Red
Medium 18ºC Orange
Low 23ºC Green
* The setpoint temperatures can be modified (See chapter Control settings).
9.4. ADVANCED PARAMETERS CONFIGURATION
In addition to the functions that can be performed through the three buttons of the hand terminal, it is
also possible to modify some of the parameters and functionalities set from factory. Depending on the
parameter to be modified, it will be necessary to access the electronic board of the controller (inside the
electrical cabinet) or the remote hand terminal.
Access to the selectors inside the remote hand terminal (rotary type)
By disassembling the front of the remote control you have access to a serie of potentiometers that allow
to modify some of the factory settings.
Using a screwdriver, perform light lever in the side slots until the front of the control is released.
View of the rotary selectors, once the cover is removed:
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Selector 3 (High speed)Selector 4
Balance
Selector 1 (Low speed)
Selector 2 (Medium speed)
Selector 2 (Special functions)