S&P CAD-COMPACT 500 User manual

EN
CAD-COMPACT BASIC

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 ..........................................................................................................................................................................4
6.1. Introduction .........................................................................................................................................................................4
6.1.1. Outdoor installation ..................................................................................................................................................5
6.2. Dimensions and free space for maintenance.....................................................................................................................6
6.2.1. Dimensions ...............................................................................................................................................................6
6.2.2. Free space for maintenance .....................................................................................................................................8
6.3. Mounting process of an additional supply filter .................................................................................................................8
6.4. Range specifications ...........................................................................................................................................................8
6.5. Connections.........................................................................................................................................................................9
6.5.1. Connection with air duct...........................................................................................................................................9
6.5.2. Condensate drainage................................................................................................................................................9
6.5.3. Electrical connection ................................................................................................................................................9
6.5.3.1. External Touch Display (ETD) control connection .......................................................................................9
6.5.4. Connecting electrical accessories..........................................................................................................................10
6.5.4.1. VAV Control (variable airflow), with CO2sensor or similar........................................................................10
6.5.4.2. CCOP Control (constant pressure)................................................................................................................................. 10
6.6. Reverse outdoor air / indoor air side................................................................................................................................11
7. CONTROL SCHEMES................................................................................................................................................................13
8. CONTROL BASIC OPERATION .................................................................................................................................................13
8.1. Description .......................................................................................................................................................................13
8.2. Main functions...................................................................................................................................................................13
8.2.1. Via the remote terminal supplied with the unit......................................................................................................13
8.2.2. Through integration to Modbus network (external BMS).......................................................................................14
8.3. Use of remote terminal - user level .................................................................................................................................14
8.3.1. Fan speed selection (Start / Stop / Speed adjustment)..........................................................................................14
8.3.2. Free-cooling function setting .................................................................................................................................15
8.3.3. Setting the by-pass temperature in free-cooling mode.........................................................................................15
8.4. Advanced parameters configuration.................................................................................................................................16
8.4.1. Modification of predefined speeds..........................................................................................................................17
8.4.2. Modification of the bypass opening setpoint (free-cooling mode).........................................................................17
8.4.3. Fan selection that acts as a master(only available on units controlled via Modbus in COP mode) ......................18
8.4.4. Operation at Variable Airflow (VAV) mode, depending on an external sensor (CO2, temperature
or relative humidity)................................................................................................................................................18
8.4.5. Filter supervision....................................................................................................................................................19
8.4.6. Exchange the function of the supply and extraction circuits .................................................................................20
8.4.7. Boost function.........................................................................................................................................................20
8.4.8. Remote Stop-Start..................................................................................................................................................20
8.4.9. Protection of heat exchanger unit ..........................................................................................................................21
9. BUILDING MANAGEMENT SYSTEM (BMS) connection ...........................................................................................................21
10. INSPECTION, MAINTENANCE AND CLEANING ......................................................................................................................26
10.1. Filters replacement.........................................................................................................................................................26
10.2. Additional filter installation ............................................................................................................................................26
10.3. Heat exchanger ...............................................................................................................................................................27
10.4. Fans .................................................................................................................................................................................27
10.5. Condensation drainpipe ..................................................................................................................................................27
11. OPERATION ANOMALIES.........................................................................................................................................................28
11.1. General anomalies..........................................................................................................................................................28
11.2. List of alarms ..................................................................................................................................................................28
12. WIRING DIAGRAMS..................................................................................................................................................................30
12.1. CAD-COMPACT 500 to 3200 models ...............................................................................................................................30
12.2. CAD COMPACT 4500 model.............................................................................................................................................31

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 the-
refore 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 infor-
mation 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 corresponds 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 CAD-COMPACT BASIC units are delivered fixed with screws to the pallets.
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.
6. INSTALLATION
6.1. INTRODUCTION
All models are designed to be installed hanging from the ceiling or located behind a false ceiling.
When installing the unit, is necessary to distribute the unit weigh between the 4 supports existing in the units.
Using studded rods (Ø 8 mm), it can be secured to the ceiling and levelled:
Check the distances between supports in the diagrams of the section: “Dimensions and free dimensions for mainte-
nance”.
The installer must make sure 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, as well as flexible couplings between the
water connections and the pipelines.

5
Model Total weight of unit
(kg)
Anti vibration kit support
(Composed of 4 pcs.)
CAD-COMPACT 500 70 KIT AM CAD-COMPACT
CAD-COMPACT 900 86 KIT AM CAD-COMPACT
CAD-COMPACT 1300 137 KIT AM CAD-COMPACT
CAD-COMPACT 1800 145 KIT AM CAD-COMPACT
CAD-COMPACT 2500 235 KIT AM CAD-COMPACT
CAD-COMPACT 3200 235 KIT AM CAD-COMPACT
CAD-COMPACT 4500 336 KIT AM CAD-COMPACT
6.1.1. Outdoor installation
The CAD-COMPACT BASIC range is advisable to be mounted indoors. Outdoor mounting is limited to areas with
less extreme climates. When it is installed outdoors,it is preferable 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 (accessory).
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.
There is a Kit composed of 6 feet, which facilitates the installation on floor of these versions: KIT PIES CAD-COM-
PACT.
Both in the case that the KIT PIES CAD-COMPACT is used, and if the unit is based on vibrators or supports made
on site, it is essential that the heat exchanger’s support is guaranteed on 6 existing support points (4 pcs. in the
corners of the unit and 2 in the midpoint of each side).
Detail of a CAD-COMPACT with the corresponding canopy and the kit of feet
List of necessary accessories recommended for outdoor installation:
Model Pies soporte Tejadillo
CAD-COMPACT 500 KIT PIES CAD-COMPACT TPP-CAD-COMPACT 500
CAD-COMPACT 900 KIT PIES CAD-COMPACT TPP-CAD-COMPACT 900
CAD-COMPACT 1300 KIT PIES CAD-COMPACT TPP-CAD-COMPACT 1300
CAD-COMPACT 1800 KIT PIES CAD-COMPACT TPP-CAD-COMPACT 1800
CAD-COMPACT 2500 KIT PIES CAD-COMPACT TPP-CAD-COMPACT 2500
CAD-COMPACT 3200 KIT PIES CAD-COMPACT TPP-CAD-COMPACT 3200
CAD-COMPACT 4500 KIT PIES CAD-COMPACT TPP-CAD-COMPACT 4500
In addition to the roof and Kit feet, it is necessary to equip the duct network with rain hoods or air intakes equipped
with anti-bird mesh to prevent the entry of animals or objects into the heat recovery unit.
Avoid condensations in electrical cabinet
In units located outdoors in which the heat recovery units is stopped during the night or during long intervals of
time, it is necessary to:
a) Install isolation dampers in the outdoor air inlet and air discharge.
b) Add anticondensation devices inside the electrical cabinet as: cabinet heating elements that prevent conden-
sation formation on cabinet surfaces and electronic components. As alternative, maintain the electronic under
voltage, this way the own heating produced by the electronic will avoid the condensation formation.

6
6.2. DIMENSIONS AND FREE SPACE FOR MAINTENANCE
6.2.1. Dimensions
a) CAD-COMPACT 500 to 1800 models
A
ØD
F
G
C
B
E
H
I
J
K K
I
J
H
BY DEFAULT (FACTORY SUPPLY)
TOP VIEW
CONFIGURATION RESULT OF SIMPLE
MODIFICATION ON SITE
FAN ACCESS
FILTER
ACCESS
E
OUTDOOR AIR INTAKE
SUPPLY FRESH AIR
EXHAUST INDOOR AIR
EXTRACT INDOOR AIR
CONDENSATE OUTLET 1/2"
ELECTRICAL CABINET
E
E
E
FILTER
ACCESS
FILTER
ACCESS
FILTER
ACCESS
FAN ACCESS FAN ACCESS FAN ACCESS
Model A B C D E F G H I J K
CAD-COMPACT 500 1120 698 289 200 862 147 188 1163 546 12 256
CAD-COMPACT 900 1345 843 376 315 1007 190 225 1388 691 12 328
CAD-COMPACT 1300 1495 1218 376 315 1382 190 318 1538 1066 12 403
CAD-COMPACT 1800 1580 1083 453 355 1247 228 285 1623 931 12 393

7
b) CAD-COMPACT 2500 to 4500 models
A
K
C
K
B
E
F
GM
L
E
TOP VIEW
BY DEFAULT (FACTORY SUPPLY)
CONFIGURATION RESULT OF SIMPLE
MODIFICATION ON SITE
J
I
E
H
E
I
H
J
FAN ACCESS
FILTER
ACCESS
OUTDOOR AIR INTAKE
SUPPLY FRESH AIR
EXHAUST INDOOR AIR
EXTRACT INDOOR AIR
CONDENSATE OUTLET 1/2"
ELECTRICAL CABINET
E
FILTER
ACCESS
FILTER
ACCESS
FILTER
ACCESS
FAN ACCESS FAN ACCESS FAN ACCESS
Model ABCDEFGH I JKLM
CAD-COMPACT 2500 1845 1495 453 - 1670 127 41 1888 1343 17 385 570 375
CAD-COMPACT 3200 2038 1325 541 - 1489 113 43 2081 1176 12 552 470 450
CAD-COMPACT 4500 2207 1993 598 - 2156 165 79 2250 1844 12 594 700 440

8
6.2.2. Free space for maintenance
W
L
OUTSIDE AIR INTAKE
NEW AIR SUPPLY
INDOOR AIR EXHAUST
INTERIOR AIR EXTRACTION
CONDENSATE OUTLET
BY DEFAULT (FACTORY SUPPLY)
TOP VIEW
CONFIGURATION RESULT OF SIMPLE MODIFICATION ON SITE
ELECTRICITY CUPBOARD
E
E
E
E A
C
H H
E
E
FF
A
A
C
BB
D
ACCESS TO FANS
ACCESS TO HEAT RECOVERY UNIT
ACCESS TO FILTERS
L
E
E
E
FF
A
A
C
BB
D
TOP VIEW
Model Unit Filters Heat exchanger Fans
LWHHABH C DHEF
CAD-COMPACT 500 1120 698 289 289 500 300 289 500* / 550** 487 289 500 300
CAD-COMPACT 900 1345 843 376 376 500 300 376 500* / 680** 570 376 500 300
CAD-COMPACT 1300 1495 1218 376 376 580 350 376 500* / 1020** 570 376 580 350
CAD-COMPACT 1800 1580 1083 453 453 500 350 453 500* / 820** 650 453 500 350
CAD-COMPACT 2500 1845 1495 453 453 750 350 453 500* / 650** 650 453 550 350
CAD-COMPACT 3200 2038 1325 541 541 600 300 541 500* / 550** 745 541 550 300
CAD-COMPACT 4500 2207 1993 598 598 950 450 598 500* / 820** 800 598 800 450
* On-site inspection or cleaning (recommended)
** Exchanger disassembly dimension (not recommended)
6.3. MOUNTING PROCESS OF AN ADDITIONAL SUPPLY FILTER
The heat recovery unit is supplied with the filters already installed. F7 (ePM1 70%) in the supply air and M5 (ePM10 50%)
in the extract air. In addition, it is possible to mount a second filter in the unit (accessory) (for more information see
section “Replacing filters”).
6.4. RANGE SPECIFICATIONS
Model Diameter
connections
air
(mm)
Nominal
airflow
150Pa**
(m3/h)
Efficiency
heat recovery
unit*
(%)
Electrical
power supply
Maximum
absorbed
power**
(kW)
Maximum
current**
(A)
Weight
(kg)
CAD-COMPACT 500 200 440 82,2 1/230V, 50-60Hz 0,31 2,1 70
CAD-COMPACT 900 315 790 82,0 1/230V, 50-60Hz 0,45 3,0 91
CAD-COMPACT 1300 315 1.120 82,3 1/230V, 50-60Hz 0,93 3,9 120
CAD-COMPACT 1800 355 1.670 82,7 1/230V, 50-60Hz 1,02 4,3 150
CAD-COMPACT 2500 570x375 2.180 83,5 1/230V, 50-60Hz 0,92 3,9 200
CAD-COMPACT 3200 470x450 3.000 83,7 1/230V, 50-60Hz 2,00 8,3 235
CAD-COMPACT 4500 700x440 4.165 84,6 3/400V, 50-60Hz 2,60 10,4 336
* Wet efficiency referred to nominal airflow, external conditions (-5ºC 80% RH) and interior (20ºC / 50% RH).
** Sum of both fans.

9
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, verify
existing identification labels in each mouth of the heat recovery units.
Exhaust air
Aire de expulsión
Espulsione all esterno
Air rejeté
Fortluft
Outdoor air
Aire exterior
Aria di rinnovo
Air neur
Aussenluft
Supply air
Aire de impulsión
Inmissione
Air Soufflé
Zuluft
Extract air
Aire de extracción
Estrazione dal locale
Air repris
Abluft
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
drain pipe of the building. Drain tips are 1/2 “GM threaded.
Drainage system
• To ensure the removal of draining condensate from the tray, a siphon must be installed sized in the way that the
distance between the water beam inside the siphon and the drain tray, will be higher than the static fan pressure.
• The horizontal sections should have a minimum slope of 2%.
min. 80mm
==
Conexionado a la
línea de condensados
Condensation
connection
The siphon should always be full of water. Check its level periodically, refilling it if necessary. An empty siphon can
cause the condensate tray to overflow and water leak through the equipment enclosure.
6.5.3. Electrical connection
In the recovery unit CAD-COMPACT BASIC range, all components integrated into the device, are supplied into
the electrical panel (motors, pressure filters, fans temperature sensors and by-pass damper). The electrical
connection is limited to the connection of control terminal (10 m. of cable are supplied) and possible electrical
accessories such as CO2sensors and finally the connection of the power supply line directly on the cut-off switch
located on the cover of the electrical cabinet.
Make electrical connection in accordance to the described in the corresponding wiring diagram, found at the end
of this manual.
It is recommended to reduce the wiring lengths of the control maneuvers in order to reduce possible effects of the
environment on the control signals.
To avoid interference that may affect the operation of the unit, it is recommended that the wiring be routed away
from other electrical power lines, motors, refrigeration compressors, frequency inverters or the like.
This equipment complies with the Electromagnetic Compatibility Regulations that are applicable to them.
The use of shielded cables is recommended, although in environments with a high level of electromagnetic dis-
turbances, it may become necessary to shield the wiring using a metal tube.
6.5.3.1. External Touch Display (ETD) control connection
The remote control is supplied with a 10 meter length cable, and it can be replaced by a cable up to 30 meters
(recommended control cable type. H05VV-F-4G 0.25).

10
The ETD control has an electrical protection IP-20 degree, so it is valid; it is reserved exclusively for indoor usage
sheltered from humidity.
Once the parameter setting is done, the remote control can be disconnected.
Dimmensions of 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 terminal plug.
6.5.4. Connecting electrical accessories
With the existing accessories is possible to perform the fans control as well as the automatic control in VAV (varia-
ble airflow) and COP (constant pressure) modes. This last is only possible when the unit is controlled via Modbus
from a BMS (Not available from the remote control).
To access the electrical terminal block and conveniently make the electrical connection of the accessories it is
advisable to remove the connection board, follow the following sequence:
1. Loosen the 5 screws that are distributed by the cover of the electrical cabinet (Fig. 1)
2. Open the cover and pull the metal plate on which the electrical terminals are located until it is outside the ca-
binet (Fig. 2).
3. The electrical cabinet has a PG connector for the electrical power cable. Further of this, in a bag that is supplied
inside the unit, there are 3 more connectors that can be used to route the control wiring to the control acces-
sories or the control panel of the building. Pass the necessary wiring through the connectors.
4.Make the electrical connection to the control board and put it back inside the electrical cabinet, making it slide
through the existing guides (Fig. 3).
)LJ )LJ )LJ
Recommended accessories for fan speed regulation
Model VAV for CO2COP
Only available via Modbus
Ambient Duct
CAD-COMPACT 500 to 3200 SCO2-A 0/10V SCO2-G 0/10V TDP-D
6.5.4.1. VAV Control (variable airflow), with CO2sensor or similar
CAD-COMPACT BASIC units are equipped with EC motors. The motors have specific terminals to receive a re-
gulation signal to control fan speed (0-10V). The 0V signal corresponds to the fan stop, while the signal of 10V
corresponds to fan maximum speed.
To perform the speed regulation in VAV with speed control from an external CO2 sensor or similar, it is only neces-
sary to have a sensor with 0-10V output signal (air quality, relative humidity, etc.) and connect it to the electrical
panel as indicated in the instruction manual.
6.5.4.2. CCOP Control (constant pressure)
This mode is only available when the unit is controlled via Modbus from a BMS
Constant Pressure (COP)
This type of regulation is associated to multi-zone ventilation systems in which ventilation multi-room is carried
out by a single heat recovery unit. Flow regulation per zone is done using motorized damperts, so speed regula-
tion of the fans aims to maintain a constant pressure in the ductwork. The value of this pressure must be deter-

11
mined experimentally during the system start-up process.
CAD-COMPACT BASIC units are equipped with EC motors. The motors have specific terminals to receive a regu-
lation signal to control fan speed (0-10V).
The 0V signal corresponds to the fan stop, while the signal of 10V corresponds to fan maximum speed.
To perform speed regulation in constant pressure mode, it is only necessary to have a pressure transmitter with a
0-2000ppm full scale and 0-10V output signal and connect it to the electrical panel as indicated in the electric dia-
grams. Carry out the integration of the pressure transmitters in the ductwork, as indicated in the following images:
1º Connect the pressure transmitter TDP-D (accessory) to the duct system where the heat recovery unit is ducted:
Position of the pressure taps of the TDP-D transmitter in COP systems with control of the extraction pressure
-
TDP-D
(Accessory)
CAD-COMPACT
BASIC
EXTRACTION
DUCT OF
BUILDING
SUPPLY DUCT
OF NEW AIR
Position of the pressure taps of the TDP-D transmitter in COP systems with control of the supply pressure
TDP-D
+
CAD-COMPACT
BASIC
(Accessory)
EXTRACTION
DUCT OF
BUILDING
SUPPLY DUCT
OF NEW AIR
6.6. REVERSE OUTDOOR AIR / INDOOR AIR SIDE
In all units it is possible to exchange the supply and extract air sides (Supply side per Extract side):
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12
To carry on this modification it is necessary to make the following modifications to the unit:
1. Exchange the supply and extract filters as well as the access covers to the filters.
2. Replace the labels that identify the function of the air inlet/outlet. To do this, a new set of labels is supplied with the
unit.
287'225$,5
$,5((;7(5,25
$5,$',5,11292
$,51(8)
$866(1/8)7
(;+$867$,5
$,5('((;38/6,Ï1
(638/6,21($//(67(512
$,55(-(7e
)257/8)7
6833/<$,5
$,5('(,038/6,Ï1
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$,5628))/e
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$,5('((;75$&&,Ï1
(675$=,21('$//2&$/(
$,55(35,6
$%/8)7
3. Modify the position of the Jumper JP6 on the PCB of the electrical panel. See point "8.4. Advanced parameters con-
figuration" in page 16.
4. Only in cold climates where by-pass is used as part of the heat exchanger defrost strategy: Reverse the direction of
the by-pass so that it remains at the supply side of the unit.
1. Disconnect the power supply of the heat recovery unit.
2. Remove the heat recovery unit panel (fig.1).
3. Extract carefully the bypass (fig.2).
4. Disconnect the electrical connector connected to the bypass.
5. Turn the bypass according to image (fig.3 and 4).
6. Connect again the electrical connector to the bypass.
7. Place the bypass in its housing again (fig.5), close the panel and start up the unit.
Fig.1 Fig.2 Fig.3
180º
5.giF4.giF

13
7. 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-D (accessory. Exclusively for use
in case of Modbus integration)
FFD Fan Failure Detector (fan relay)
8. CONTROL BASIC OPERATION
8.1. 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 CAD-COMPACT.
8.2. MAIN FUNCTIONS
The BASIC controller allows the management of the following functions:
8.2.1. 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
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
Inversion of the supply and extraction airflows (The supply fan becomes the extraction fan and viceversa)
Modbus RTU communication

14
8.2.2. Through integration to Modbus network (external BMS)
Integration into Modbus networks is incompatible with the use of the remote control. In addition to allfunctionality
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-D sensor.
Visualization of functional parameters of the unit, including:
- Outdoor air temperature
- Supply temperature
- Indoor air temperature
- Exhaust air temperature
- Current fan speed
- Detailed information about alarms
8.3. 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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$MXVWHGHODWHPSHUDWXUDGHDEHUWXUDGHOE\SDVVPRGRIUHHFRROLQJ
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By-pass mode selection manual/automatic
Bypass pass temperature setting (free-cooling mode)
Start / Stop / Speed Adjustment
8.3.1. 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, following the
sequence:
Unidad
OFF
Velocidad
LENTA
Velocidad
MEDIA
Velocidad
ALTA
Velocidad
MEDIA
Velocidad
BAJA
Unidad
OFF
Modo
AUTO
Previa
configuración
HIGH
speed
MEDIUM
speed
LOW
speed
Unit
OFF
LOW
speed
Unit
OFF
MEDIUM
speed
AUTO
mode
Previously
configured
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).

15
8.3.2. Free-cooling function setting
The heat recovery units of the CAD-COMPACT range are equipped with a by-pass damper that, when opened,
allows outdoor air to be introduced in the building without being heated / cooled in the heat exchanger. (As this is
a partial bypass a small percentage of air continues passing through the heat exchanger).
The BASIC controller manages the by-pass damper based on the temperatures measured by the 4 temperature
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 and 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 and 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 condensates inside
the heat exchanger, the bypass is opened as the last action of the defrost strategy. Previously, 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 positions:
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By-pass
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 indi-
cated state for 8 hours.
Operation in automatic mode
The free-cooling / free-heating mode is programmed with the following algorithm: The lower temperature 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.
8.3.3. Setting the by-pass temperature in free-cooling mode
Pressing on the button modifies the setpoint temperature value of the by-pass. Below this temperature, whe-
never there is a demand for cooling in the building, the by-pass damper will be opened:
7HPS
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7HPS
0(',$
7HPS
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9HORFLGDG
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7HPS
$/7$
HIGH
temp
HIGH
temp
MEDIUM
temp
MEDIUM
temp
LOW
temp
Temperature Default value* Led colour
High 25ºC Red
Medium 20ºC Orange
Low 15ºC Green
* The setpoint temperatures can be modified (See chapter Control settings).

16
8.4. 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 it is able to access to a serie of potentiometers that allow to modify
some of the factory settings. Using a screwdriver, perform a light pressure 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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6HOHFWRU9HO$OWD
6HOHFWRU9HO%DMD
6HOHFWRU
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6HOHFWRU)XQFLRQHVHVSHFLDOHV
Selector 3 (High speed)Selector 4
Balance
Selector 1 (Low speed)
Selector 2 (Medium speed)
Selector 4 (Special functions)
Access to controller PCB selectors and jumpers
nside the electrical cabinet is the PCB controller, which has some selectors and jumpers through which it is possible to
change the factory settings of the controller:

17
Jumper Functionality
JP1 Enable Modbus communication (Control of the unit from the BMS)
JP4 In Modbus networks, define last unit in the network (end of line)
JP6 Exchange of the supply and extraction airflows
X31 Origin of fan speed control (Command, external sensor, etc.)
Functionality of the selectors and jumpers on the controller board (inside the electrical cabinet).
8.4.1. Modification of predefined speeds
Low Speed (Selector 1): Setting of the supply fan low speed. Between 2,1 and 3,5V with increments of 0,2V for
each position of the selector. Default setting 3.5V (Selector position F).
Medium Speed (Selector 2): Setting of supply fan medium speed. Between 3,5V and 6,5V with increments of 0,2V
for each position of the selector. Default setting 6V (Selector position D).
High Speed (Selector 3): Setting of supply fan high speed. Between 6,5V and 9,5V with increments of 0,2V for each
position of the selector. Default setting 9,5V (Selector position F).
Balance (Selector 4): The predefined setpoints with selectors 1,2 and 3 will be directly those applied to the supply
fan, while the extract fan may work with a certain unbalance regarding the supply fan. This unbalance is defined
through the selector 4, as a percentage between -30% and 30% with increments of 5%. The unbalance values
assigned to each position of the selector are the following ones:
Selector position Selector 1
(Low speed)
(Vdc)
Selector 2
(Medium speed)
(Vdc)
Selector 3
(High speed)
(Vdc)
Selector 4
(Balance)
0 2,1 3,5 6,5 -30 %
1 2,1 3,7 6,7 -25 %
2 2,1 3,9 6,9 -20 %
3 2,1 4,1 7,1 -15 %
4 2,1 4,3 7,3 -10 %
5 2,1 4,5 7,5 -5 %
6 2,1 4,7 7,7 0 %
7 2,1 4,9 7,9 5 %
8 2,1 5,1 8,1 10 %
9 2,3 5,3 8,3 15 %
A 2,5 5,5 8,5 20 %
B 2,7 5,7 8,7 25 %
C 2,9 5,9 8,9 30 %
D 3,1 6,1 9,1 0 %
E 3,3 6,3 9,3 0 %
F 3,5 6,5 9,5 0 %
Possible regulations depending on the position of the control selectors.
8.4.2. Modification of the bypass opening setpoint (free-cooling mode)
Using the SW4.4 selector it is possible to select between two ranges of setpoint temperatures:
6: 6: 6: 6:
21
2))
SW4.4 Predefined temperature range
OFF 13/18/23ºC
ON 15/20/25ºC (by default)
Once a certain range has been selected, the setpoint value is selected by pressing on the temperature icon (See
section “Remote control setting - User”.

18
8.4.3. Fan selection that acts as a master
(only available on units controlled via Modbus in COP mode)
Using the SW4.3 selector it is possible to define which of the two fans acts as a master. The fan defined as mas-
ter must be the one that supplies or extracts air from the network of ducts in which the pressure transmitter is
installed.
The speed of the fan defined as a slave is regulated as a percentage of the speed of the master fan, being possible
to apply a percentage of unbalance.
6: 6: 6: 6:
21
2))
SW4.3 COP motors configuration
OFF Supply master- Extract slave
ON Extract master- Supply slave
8.4.4. Operation at Variable Airflow (VAV) mode, depending on an external sensor
(CO2, temperature or relative humidity)
CAD-COMPACT BASIC units can regulate fan control speed proportionally to the signal of an external sensor with
0-10V output. The increase of the sensor measure causes the fan speed to be increased according to a previoulsy
configured proportional ramp.
Smax
Smin
Salida de regulación
a ventiladores
(0-10 VDC)
Entrada al control /
Salida del sensor (0-10V)
Setpoint
Offset
Alarm
Sensor input
(0-10 V)
Fan regulation
output
(0-10 VDC)
From factory, this functionality is disabled. The automatic operation mode is enabled and configured by means of
the jumper in the X31 pin strip (in the controller board). The position of the jumper depends on the type of sensor
used according to the following table:
Without
sensor
CO2 Temp. Hum. Rel. Control
0-10V
desde BMS
Not used Not used
Jumper position 1 2 3 4 5 6 7
Range - 2000ppm 50ºC 100% 10V
Setpoint - 1100ppm 25ºC 50% 5V
Offset reg. (+/-) - 400ppm 2ºC 5% 2.5V
Alarm - 1600ppm 28ºC 70% 10V
Smin - 2V 2V 2V 2V
Smax - 10V 10V 10V 10V

19
8.4.5. Filter supervision
CAD-COMPACT BASIC heat recovery units are supplied with pressure switches mounted on both filters (supply
and extraction). When the differential pressure value measured by the pressure switches exceeds 200Pa an alarm
is produced. Depending on the particularities of the installation (operating hours and polution of the outdoor en-
vironment) it may be advisable to change the pressure switch setting as indicated in the following table:
Filters state Airflow Action
The filters alarm appears offen When the dirty filter alarm is
active, the air flow is correct
Increase pressure switch setting to 300 Pa
No dirty filter alarm appears
or it takes too long to appear
Insufficient air flow due to filter
clogging
Reduce the pressure switch setting to less
than 200Pa
The filters alarm appears with
too much frequency
When the dirty filter alarm is
active, the airflow is insufficient
The performance of the heat recovery unit is
not enough:
- Review the dimensioning of the duct system
- Check leakages
- Oversize the selected heat recovery unit
To change the pressure switch setting, follow the sequence below:
1. Access the filter zone in which the
pressure swich filters are placed
2. Lift the pressure switch cover
H2O
base
lift slightly and remove
the dissasembly the cover
from the base
3. Turn the dial (1) using a flathead
screwdriver, until the pointer (2)
indicates the pressure value to be
defined



20
8.4.6. Exchange the function of the supply and extraction circuits
• By the JP6 Jumper existing on the electronic board of the electrical panel, it is possible to interchange the func-
tion of the supply and extract fans.
• The supply fan becomes the extraction fan and viceversa.
OUTDOOR AIR INTAKE
SUPPLY )5(6+ AIR
EXTRACT INDOOR AIR CONDENSATED OUTLET 1/2"
ELECTRICAL CABINET
E
EE
TOP VIEW
Jumper JP6
CLOSED OPENED 23(1('
6XSSO\IUHVKDLUIDQDW right side6XSSO\IUHVKDLUIDQDW left side (by default)
ACCESS
TO FAN
ACCESS
TO FAN
ACCESS
TO FAN
ACCESS
TO FAN
ACCESS
TO FILTER
ACCESS
TO FILTER
ACCESS
TO FILTER
ACCESS
TO FILTER
TOP VIEW
EXHAUST INDOOR AIR
Jumper JP6
The position of jumper JP6 defines:
Jumper JP6 Function
Closed-ON (by default) Fresh air supply on the left side seen from the electrical panel
Open-OFF Fresh air supply on the right side seen from the electrical panel
8.4.7. Boost function
By closing an external digital contact, it is possible to force the fan operation at normal speed for a setted time
(30 mins. by default).
Operation: when activating and deactivating the boost (push-button operation) on terminals F3-F4, fans start
running at Boost speed. The unit will stay at that speed during the preset time (30 minutes by default). After this
time the fans go back to its previously selected speed.
By means of the corresponding Modbus registers it is possible to configure:
• Fan control signal in Boost mode (5 to 10V)
• Duration of boost time
• Type of contact (NO, NC): Coil, 6
Deactivation Boost Function: once the Boost is active, it can be deactivated either by stopping the unit via the
remote hand terminal, or by disconnecting it from the power supply.
8.4.8. Remote Stop-Start
It is possible to start-stop the unit by means of an external digital contact (see electric diagrams). The contact
closure between CLP1 and CLP2, will produce the unit stop.