Swegon GLOBAL PX Troubleshooting guide

GLOBAL RX TOP
Operation and maintenance instructions
GLOBAL PX/RX/LP
Applicable to program versions TAC5 –Version DT 2.8.8 & DG 2.7.3
GLOBAL PX
GLOBAL LPFW
GLOBAL PX TOPFW
GLOBAL RX
GLOBAL PXFW

2
1.0 Safety precautions
2.0 Symbols and abbreviations
3.0 Product Overview
4.0 Wiring Overview
5.0 Functions
6.0 Commissioning
6.1 Commissioning with Touchscreen interface
7.0 Preventive maintenance
8.0 Troubleshooting
9.0 Parameters/Commissioning Sheet
10.0 CE Declaration
GLOBAL PX/RX/LP
Table of content
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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1.0 Installation manual
Applicable for the following units
EXCHANGER SIZES INTEGRATED
PREHEATING
INTEGRATED
POSTHEATING HANDING FAN
GLOBAL PXFW
Counterow
800/1200/2000/
3000/4000/6000 Yes, electrical Yes, electrical or water Le/ Right Forward (FW)
GLOBAL PX
Counterow
800/1200/2000/
3000/4000/6000 Yes, electrical Yes, electrical or water Le/ Right Backward
GLOBAL PX TOPFW
Counterow 800/1200/2000 Yes, electrical Yes, electrical or water Right Forward (FW)
GLOBAL RX
Rotary
05/08/10/12/13/
14/16/18/20/24/26 No Yes, electrical or water Le/ Right Backward
GLOBAL RX TOP
Rotary
05/08/10/12/
13/14/16 No Yes, electrical or water Le/ Right Backward
GLOBAL LPFW
Counterow
450/600/1000/
1600/2000 Yes, electrical No Le/ Right Forward (FW)
GLOBAL LP
Counterow
02/04/06/08
10/12/13/14/16/20 Yes, electrical Yes, electrical or water Le/ Right Backward
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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Disclaimer
Danger/Warning/Caution
• All sta concerned shall acquaint themselves with
these instructions before beginning any work on the
unit. Any damages to the unit or its components
caused by improper handling or misuse by the
purchaser or the installer cannot be considered
subject to guarantee if these instructions have not
been followed correctly.
• Make sure that the power supply to the unit is
disconnected before performing any maintenance or
electrical work!
• All electrical connections must be carried out by an
authorized installer and in accordance with local
rules and controls.
• Although the mains supply to the unit has been
disconnected there is still risk for injury due to
rotating parts that have not come to a complete
standstill.
• Beware of sharp edges during mounting and
maintenance. Make sure that a proper liing device
is used. Use protective clothing.
• Unit should always be operated with closed doors
and panels.
• If the unit is installed in a cold place make sure that
all joints are covered with insulation and are well
taped.
• Duct connections/duct ends should be covered
during storage and installation, in order to avoid
condensation inside of the unit.
• Check that there are no foreign objects in unit,
ducting system or functional sections.
• The unit is packed to prevent damage of the
external and internal parts of the unit, dust and
moisture penetration. If the unit is not to be installed
immediately, it should be stored in a clean, dry
area. If stored externally, it should be adequately
protected from the weather inuence.
RANGE OF APPLICATION
The GLOBAL units are designed for use in comfort
ventilation applications.
Depending on the variant selected, GLOBAL units can be
utilised in buildings such as oce buildings, schools, day
nurseries,public buildings, shops, residential buildings, etc.
GLOBAL units equipped with plate heat exchangers (PX)
can also be used for the ventilation of moderately humid
buildings; however not where the humidity is continuously
high, such as in indoor swimming baths, saunas, spas or
wellness centres.
Please do contact us if you have a need for a unit that is
suited for such an application.
HOW TO READ THIS DOCUMENT
Please make sure that you have read and understood the
safety precautions below.
Please read chapter 2 where the Symbols and
Abbreviations used for GLOBAL are listed and Chapter 5
where the operating principles of a GLOBAL air handling
unit are described. The commissioning of the unit is
described in chapter 6.
The commissioning chapter is divided based on what
device (Remote Control, Graphical Remote Control or
App) is used to control the unit. Simply go to the sub
chapter, relevant for your device and the base setup for
the operating mode which will be used to control the
unit.
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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2.0 Symbols and abbreviations
BW BACKWARD
CURVED FAN FW FORWARD CURVED FAN
BF BAG FILTER PF PLEATED FILTER
RX ROTARY HEAT
EXCHANGER PX PLATE HEAT EXCHANGER
WARNING
Must be connected by a qualied Electrician.
Warning! Hazardous voltage.
OUTDOOR AIR Air from outdoor to the AHU
SUPPLY AIR Air from the AHU to the building
EXTRACT AIR Air from the building to the AHU
EXHAUST AIR Air from the AHU to outdoor
COOLING COIL BA- IBA/KW HEATING COIL
(WATER/ ELECTRICAL)
SILENCER GD CTm MOTORIZED
DAMPER
PRESSURE SENSOR PTx TEMPERATURE SENSOR
Nr = x (1,2,3…)
SLIP CLAMP SC MS FLEXIBLE
CONNECTION
CIRCULAR DUCT CONNECTION ER For inlet SR For outlet
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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3.1 GENERAL OVERVIEW
ATTENTION
Right and le hand units have dierent article numbers and should be ordered accordingly.
It is however possible to change the direction aerwards but only by an accredited
Service technician. Main version described in the manuals is always the hand right version.
3.0 Product Overview
RIGHT HAND UNIT SUPPLY AIR TO THE RIGHT LEFT HAND UNIT SUPPLY AIR TO THE LEFT
GLOBAL RX GLOBAL RX
GLOBAL RX TOP GLOBAL RX TOP
GLOBAL PX (FW) GLOBAL PX (FW)
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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ATTENTION
Right and le hand units have dierent article numbers and should be ordered accordingly.
It is however possible to change the direction aerwards but only by an accredited
Service technician. Main version described in the manuals is always the hand right version.
RIGHT HAND UNIT SUPPLY AIR TO THE RIGHT LEFT HAND UNIT SUPPLY AIR TO THE LEFT
Attention: The dierence between le and right LP units is the factory placement of the controls box on opposite sides.
GLOBAL LP (TOP view) GLOBAL LP (TOP view)
GLOBAL PX TOP FW GLOBAL PX TOP FW
GLOBAL LP 450FW (BOTTOM view) GLOBAL LP 450FW (BOTTOM view)
GLOBAL LP 600/1000/2000 FW (BOTTOM view) GLOBAL LP 600/1000/2000 FW (BOTTOM view)
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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5
4
3
2
6
7
8
9
9
10
11
19
13
20
20
18
18
1. Main power switch for AHU
2. Main power switch for electrical coils
(both internal pre-hating and post-heating)
3. Wiring box TAC5 controller
4. Supply fan
5. Extract fan
6. Kit CA -airow measurement (option)
7. Outdoor air lter (bag or pleated)
8. Extract air lter (bag or pleated)
9. Heat exchanger (Plate or Rotary)
10. Modulating 100% by-pass (PX only)
11. Drain pan and drain pipe (PX only)
12. Pre-heating electrical antifrost coil (PX only)
13. Internal post-heating water or electrical coil (accessory)
14. Motorized damper (at outdoor air side - accessory)
15. Motorized damper (at exhaust air side - accessory)
16. Access panel (LP only)
17. Flexible connection(accessory)
18. Slip Clamps (accessory)
19. Water connection for postheating (accessory)
1, 2 and 3 must be installed by an accredited electrician
Note: internal electrical coils, motorized dampers, internal fan-pressure sensors, exible connections and
slip-clamps have to be ordered initially and are all pre-mounted and factory wired. Internal heating water-
coil accessory is pre-mounted but has to be hydraulically and electrically connected by the installer.
GLOBAL PX FW
GLOBAL LPFW GLOBAL PX TOPFW
GLOBAL LP
3.2
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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EXCHANGER SIZE AIR VOLUME A [mm] B [mm] C [mm] Weight [kg]
GLOBAL PX
Counterow
800 (FW) 800 m³/h 222 l/s 575 1210 1235 195
1200 (FW) 1200 m³/h 333 l/s 940 1210 1235 245
2000 FW
2000 m³/h 560 l/s 1105 1635 1230 325
2000 1360 375
3000 FW
3000 m³/h 833 l/s 1475 1635 1230 370
3000 1360 420
4000 FW
4000 m³/h 1111 l/s 1845 1635 1230 540
4000 1360 545
5000 FW
5000 m³/h 1389 l/s 2135 1635 1600 690
5000 1760 690
6000 FW
6000 m³/h 1667 l/s 2135 1635 1600 715
6000 1760 715
GLOBAL LP
Counterow
450 FW 450 m³/h 125 l/s 1100 560 360 75
600 FW 600 m³/h 167 l/s 1490 850 320 110
1000 FW 1000 m³/h 278 l/s 1550 1000 400 160
1600 FW 1600 m³/h 444 l/s 1550 1640 400 225
2000 FW 2000 m³/h 556 l/s 1700 1940 400 270
02 580 m³/h 160 l/s 1300 890 350 105
04 650 m³/h 180 l/s 1300 1100 350 125
06 1050 m³/h 290 l/s 2100 1050 435 195
08 1450 m³/h 400 l/s 2100 1300 435 230
10 1850 m³/h 510 l/s 2100 1600 435 270
12 2200 m³/h 610 l/s 2250 1700 510 325
13 2600 m³/h 720 l/s 2250 1700 510 325
14 2900 m³/h 800 l/s 2250 1940 510 360
16
20
3.3 AIR VOLUMES AND DIMENSIONS
GLOBAL PX(FW) GLOBAL LP(FW)
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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1, 2 and 3 must be installed by an accredited electrician
Note: internal electrical coils, motorized dampers, internal fan-pressure sensors, exible connections and
slip-clamps have to be ordered initially and are all pre-mounted and factory wired. Internal heating water-
coil accessory is pre-mounted but has to be hydraulically and electrically connected by the installer.
GLOBAL RX TOP GLOBAL RX
1
2
3
4
5
6
6
7
8
9
13
15
14
17
17
18
18
19
3.2
1. Main power switch for AHU
2. Main power switch for electrical coils
(both internal pre-hating and post-heating)
3. Wiring box TAC5 controller
4. Supply fan
5. Extract fan
6. Kit CA -airow measurement (option)
7. Outdoor air lter (bag or pleated)
8. Extract air lter (bag or pleated)
9. Heat exchanger (Plate or Rotary)
10. Modulating 100% by-pass (PX only)
11. Drain pan and drain pipe (PX only)
12. Pre-heating electrical antifrost coil (PX only)
13. Internal post-heating water or electrical coil (accessory)
14. Motorized damper (at outdoor air side - accessory)
15. Motorized damper (at exhaust air side - accessory)
16. Access panel (LP only)
17. Flexible connection(accessory)
18. Slip Clamps (accessory)
19. Water connection for postheating (accessory)
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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Duct connections: see drawings downloadable on our website.
EXCHANGER SIZE AIR VOLUME A [mm] B [mm] C [mm] Weight [kg]
GLOBAL RX TOP
Rotary
05 1100 m³/h 305l/s 815 1530 1315 295
08 1500 m³/h 416l/s 815 1530 1315 310
10 1600 m³/h 440l/s 885 1680 1465 365
12 2000 m³/h 555l/s 885 1680 1465 365
13 2300 m³/h 640l/s 995 1680 1465 390
14 2800 m³/h 780l/s 1182 1680 1465 400
16 3200 m³/h 830l/s 1182 1680 1465 410
GLOBAL RX
Rotary
05 1200 m³/h 330 l/s 815 1530 1315 295
08 1600 m³/h 440 l/s 815 1530 1315 310
10 1800 m³/h 500 l/s 885 1680 1465 355
12 2300 m³/h 640 l/s 885 1680 1465 340
13 2900 m³/h 805 l/s 995 1680 1465 365
14 3100 m³/h 860 l/s 1182 1680 1465 390
16 3400 m³/h 940 l/s 1182 1680 1465 400
18 4500 m³/h 1250 l/s 1382 1880 1725 535
20 5500 m³/h 1525 l/s 1382 1880 1725 535
24 6700 m³/h 1860 l/s 1640 1880 1725 575
26 7200 m³/h 2000 l/s 1640 1880 1725 575
3.3 AIR VOLUMES AND DIMENSIONS
GLOBAL RX TOP
This document is an overview of technical specifications. Please do refer to our selection software for detailed and up-to-date information.

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Operation and maintenance instructions – v2.8.8 & 2.7.3
MAIN CONTROL BOARD TAC5 DG  CID025000
TAC5 DG: GLOBAL PX & LPFW
CT = output to CT actuator(s) (option - prewired) IN1 = Master selection
BYPASS = output to bypass actuator (prewired) IN2 = dPa (pressostat digital input)
AL1 = ALARM OUTPUT (230V/5A) IN3 = Fire alarm input
B-/A+/ GND /+12V = connection to HMI IN4 = Bypass open /Stop heat recovery
K1: Airow MODE = m³/h K1 IN5 = Real time clock auto/manu
Demand/Pressure control = START/STOP IN6 = ON/OFF post heating (IBA/KWout)
Torque MODE = %torque K1 IN7 = ON/OFF SUPPLY if re alarm
K2: Airow control = m³/h K2 IN8 = ON/OFF EXHAUST if re alarm
Demand/Pressure control = 0-10V INPUT IN9 = BOOST Airow
Torque control = %torque K2 IN12 = PWM input bypass position
K3: Airow control = m³/h K3 OUT1 = 0-10V OUTPUT (airow/pressure)
Demand/Pressure control = % ON K3 or 0-10 V INPUT OUT2 = 0-10V OUTPUT (airow/pressure)
Torque control = %torque K3 OUT4 = 0-10V OUTPUT internal post heating (IBA)
T1 = from outdoors T° sensor (prewired) OUT5 = 24VDC /1A
T2 = from indoors T° sensor (prewired) O.R.1 (output relay 1 - SAT3) = PRESSURE ALARM
T3 = to outdoors T° sensor (prewired) O.R.2 (output relay 2 - SAT3) = FAN ON
T4 = IBA anti freeze protection T° sensor (option - prewired) O.R.3 (output relay 3 - SAT3) = HEATING DEMAND OUTPUT
T5 = supply T° sensor for IBA/KWout coil (option - prewired) O.R.4 (output relay 4 - SAT3) = BYPASS STATUS
PR1 = Pa from supply inlet fan (only on PX - option) KWin = output for KWin capacity control (option - prewired)
PR3 = Pa from exhaust inlet fan (only on PX - option) KWout = output for KWout capacity control (option - prewired)
4.0 Wiring Overview

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Operation and maintenance instructions – v2.8.8 & 2.7.3
TAC5 DT: GLOBAL RX (TOP) & LP(FW)
CT : output to CT actuator(s) (option - prewired) IN1 = Master selection
KWout = output for KWout capacity control (option - prewired) IN2 = dPa (pressostat digital input)
AL1 = ALARM OUTPUT (230V/5A) IN3 = Fire alarm input
B-/A+/ GND /+12V = connection to HMI IN4 = Bypass open /Stop heat recovery
K1: Airow control = m³/h K1 IN5 = Real time clock auto/manu
Demand/Pressure control = START/STOP IN6 = ON/OFF post heating (IBA/KWout)
Torque control = %torque K1 IN7 = ON/OFF SUPPLY if re alarm
K2: Airow control = m³/h K2 IN8 = ON/OFF EXHAUST if re alarm
Demand/Pressure control = 0-10V INPUT IN9 = BOOST Airow
Torque control = %torque K2 IN12 = input pulse from heat exchanger magnet (prewired)
K3: Airow control = m³/h K3 OUT1 = 0-10V OUTPUT (airow/pressure)
Demand/Pressure control = % ON K3 or 0-10 V INPUT OUT2 = 0-10V OUTPUT (airow/pressure)
Torque control = %torque K3 OUT4 = 0-10V OUTPUT internal post heating (IBA)
T1 = from outdoors T° sensor (prewired) OUT5 = 24VDC /1A
T2 = from indoors T° sensor (prewired) O.R.1 (output relay 1 - SAT3) = PRESSURE ALARM
T4 = IBA anti freeze protection T° sensor (option - prewired) O.R.2 (output relay 2 - SAT3) = FAN ON
T5 = supply T° sensor for IBA/KWout coil (option - prewired) O.R.3 (output relay 3 - SAT3) = HEATING DEMAND OUTPUT
PR1 = Pa from supply inlet fan (only on RX - option) O.R.4 (output relay 4 - SAT3) = BYPASS STATUS
PR3 = Pa from exhaust inlet fan (only on RX - option) R-GND: output for heat exchanger wheel speed command (prewired)
MAIN CONTROL BOARD TAC5 DT  CID026001

14
Operation and maintenance instructions – v2.8.8 & 2.7.3
4.1 CIRCUIT BOARD SAT 3  CID3 72 005
The SAT3 circuit board is used for extra functions for
which inputs and outputs are not included as standard
in the control unit of the air handling unit. All outputs
are normally open (N.O.). Maximal load: 230VAC – 4A.
The circuit board SAT3 allows for signalling of the
following by means of a potential-free contact:
• Fan status - O.R. 1
• Dierential pressure alarm - O.R. 2
• Heating demand - O.R.3
• Bypass status - O.R.4
Installation
SAT3 must be plugged onto the control board circuit
(see g.1).
Attention: The SAT3 must be plugged in before
the circuit is powered. SAT must be plugged in
correctly, wrong positioning can damage both
circuits permanently.
Fig. 3
4.2 CIRCUIT BOARD SAT BA/KW  CID3 72 004
SAT TAC5 BA/KW is a satellite circuit designed to be tted on the main
control board. It permits control of external coils.
Installation
The SAT BA/KW must be plugged onto the control board circuit
(see Fig.2).
Attention: The SAT TAC5 BA/KW must be plugged in before
the circuit is powered. SAT must be plugged in correctly, wrong
positioning can damage both circuits permanently.
Wiring
The terminals of the SAT BA/KW are displayed in g.3
WP WP = Cooling demand (max. 30 V-2 A)
OUT7 = 0-10 V output to control heating- or change over capacity.
OUT8 = 0-10 V output to control cooling capacity
OUT9 = PWM output to control electrical coil
T°7 = Heating coil frost protection sensor (T7)
T°8 = Cooling coil frost protection sensor (T8)
IN10 = boosted cooling OFF, (to boost external post heating coil use IN6)
IN11 = Input cooling/heating (open = heating, closed = cooling)
Fig. 1
Fig. 2

15
Operation and maintenance instructions – v2.8.8 & 2.7.3
4.3 INTERNAL WIRING DIAGRAM GLOBAL PX

16
Operation and maintenance instructions – v2.8.8 & 2.7.3
4.4 INTERNAL WIRING DIAGRAM GLOBAL RX TOP

17
Operation and maintenance instructions – v2.8.8 & 2.7.3
4.5 INTERNAL WIRING DIAGRAM GLOBAL LPFW

18
Operation and maintenance instructions – v2.8.8 & 2.7.3
5.1 OPERATING MODE
There are ve main operating modes. The operating
mode determines how the airow or the fan torque
is modulated. The default operating mode is Airow
control. Exceptions are units equipped with backwards
fans without the Constant Air Kit or if Constant Torque
mode has been selected in the product setup menu, in
both cases it is the fan torque that will be controlled and
modulated.
5.0 Functions
In all the operating modes, the supply fan(s) will operate
as per the assigned mode and parameters. The exhaust
fan(s) will operate according to the chosen percentage
of the supply fan (%EXH/SUP ratio). The ve main
operating modes are:
• 1 - Airow control:
Flow control involves operating the air handling unit to keep the pre-set airow constant. The speed of the
fans is automatically regulated to provide correct airow even if the lters begin to become clogged, air
terminals are blocked, etc. Airow control mode is advantageous, since the airow always is exactly as it was
from the beginning. It should however be noted that everything that increases the pressure drop in the
ventilation system, such as blocking of air terminals and dust accumulating in lters, causes the fans to run at
a higher speed. This results in higher power consumption and may also cause discomfort in the form of noise.
There are three airow setpoints to be congured by the user (m³h K1, m³h K2, m³h K3).
• 2 - Torque control:
3 torque setpoints to be congured by the user (%TQ K1, %TQ K2, %TQ K3). The setpoint is congured
in % of the maximal torque. The torque control allows to vary the fan speed automatically, to
provide a variable airow for demand controlled systems (DCV). This allows for demand controlled fan operation
or fan optimisation by a BMS system, mostly used in multi zone systems. This operation mode can partially
replace the constant pressure control when a duct pressure sensor hasn’t been installed.
• 3 - Demand control 0-10V:
The airow is controlled by a 0-10 V signal. The control signal is connected to terminals K2&GND. The assigned
supply airow is set as a percentage of a linear 0-10 V signal. The user denes the link with 4 parameters: Vmin,
Vmax, m³h Vmin and m³h Vmax, applied to the following diagram. The demand control mode is also
available for modulating fan torque instead of airow (relevant for backwards fans units without Kit CA).
The principle is identical to the demand control mode operation with the dierence that Vmin and Vmax are
connected to a %TQ instead of m³/h.
• 4 - Pressure control:
The airow automatically varies to provide constant pressure in the ducting system. This type of control is
also called VAV control (Variable Air Volume).
Pressure on supply: the airow of the supply fan(s) is modulated to maintain a certain pressure Setting
constant. The pressure is measured by a pressure sensor located in the supply air duct.
Pressure on exhaust: the airow of the exhaust fan(s) is modulated to maintain a certain pressure Setting
constant. The pressure is measured by a pressure sensor located in the extract air duct.
• 5 - MODE OFF :
This stops the AHU

19
Operation and maintenance instructions – v2.8.8 & 2.7.3
5.2 TEMPERATURE CONTROL
5.3 FREE COOLING RX AND PX
There are several options available on GLOBAL units to ensure a comfortable temperature.
The options are controlled either via supply or extract air temperature.
The free cooling function uses the lower temperature of the outside air to cool the building.
Free cooling is realized by means of the integrated 100% modulating bypass of the heat exchanger (PX) or the stepless
motor control of the rotary heat exchanger (RX). The optional output O.R.4 on the SAT3 relay indicates the position of
the bypass. The contact will open if the bypass is fully closed, or close if the bypass is fully or partially open.
The bypass (PX) or the rotary heat exchanger (RX) can be congured as on/o or modulating. This is congured
in ADVANCED SETUP. In modulating mode, the temperature is congured in the base setup and the position of
the bypass/stepless motor will modulate in order to maintain the setpoint. The free cooling function is activated
automatically. An on/o bypass/ stepless motor operates according to the logic below:
Free cooling STARTS if the following conditions are TRUE :
These Settings can be congured in ADVANCED SETUP
Free cooling STOPS if one of the following conditions is TRUE :
Extract Air Temperature
The default temperature control can be changed to Extract temperature control via the advanced setup.
The extract air temperature is measured on sensor T2. Extract air control involves keeping a constant temperature in
the extract air duct (premises), by controlling the supply air temperature. This provides a uniform temperature in the
premises regardless of the load. The internal sensor T2 can be replaced with the optional external room temperature
sensor (CID370042).
Temperature sensor positioning :
• The outdoor temperature (sensor T1) is lower
than the extract air temperature (sensor T2)
• The outdoor temperature (sensor T1) is
higher than 15°C.
• The extract air temperature (sensor T2) is
higher than 22°C.
• The outdoor temperature (sensor T1) is higher
than the extract air temperature (sensor T2).
• The outdoor temperature (sensor T1) is
lower than 14°C.
• The extract air temperature (sensor T2) is
lower than 20°C.
Supply Air Temperature
Supply temperature control is the default setting. This involves keeping a constant supply air temperature without
consideration to the load in the premises. The supply air temperature is measured on sensor T5.

20
Operation and maintenance instructions – v2.8.8 & 2.7.3
5.5 CHANGE OVER FUNCTION
The TAC5 controller allows for the control of both cooling and heating coil. Both coils are equipped with their motorised
3-way valves. The oset between the measured temperature (supply air or extract air, to be congured) and the
setpoint will determine if heating or cooling is automatically activated. When the unit is equipped with both a cooling
and a heating coil, only one setpoint has to be congured: Comfort temperature. The neutral band prevents the cooling
and heating systems from counteracting each other. The high neutral band is added to the comfort setpoint for the
activation of the cooling function and the low neutral band is subtracted from the comfort setpoint for the activation of
the heating function. Both high and low neutral bands have to be congured in the advanced setup.
4 PIPE AUTOMATIC CHANGE OVER
5.4 COOLING RECOVERY RX ONLY
Cooling recovery STARTS if the following condition is TRUE :
• The outdoor temperature (sensor T1) is higher than the extract air temperature (sensor T2).
The cooling recovery function uses the lower extract air temperature to cool down the fresh air. The function is not
congurable. If there is a cooling load in the building and the temperature in the extract air is lower than the outdoor
air temperature, the heat exchanger shall be automatically controlled to operate at maximal speed. The temperature
setpoint is congured in the base setup and the rotary heat exchanger will modulate in order to maintain the setpoint.
The cooling recovery operates according to the logic below: