FLEXIT S220R Air Handling Unit Instruction Manual

FLEXIT S220R Air Handling Unit

Product Information

The ProNordic S220R is an air handling unit designed for ventilation in homes and commercial buildings. It is equipped with various features and components to ensure efficient and safe operation. The unit comes with installation and maintenance instructions, an automatic control manual, and a wiring diagram.

Symbols Used
The product uses different symbols for labeling and providing information in the installation and user documentation. These symbols include:

• Supply air symbol
• Extract air symbol
• Exhaust air symbol
• Outdoor air symbol
• DANGER! ELECTRICITY symbol
• DANGER! DO NOT TOUCH symbol
• EXAMPLE OF NIPPLE LOCATIONS symbol
• NOTICE! symbol
• CAUTION! symbol
• INFO! symbol

Safety Instructions
Before using the unit, it is important to read all the safety instructions and warning texts to prevent electric shock or injury. Installation and maintenance should be carried out by qualified electricians. It is important not to extract combustible or flammable gases using the unit. A full safety and function assessment of the appliance should be carried out. The unit must be shut off before service or maintenance, including cleaning. The ventilation air should never be stopped except during service/maintenance or in case of an accident. The unit should not  be operated without the filters being in place. Plumbing work should be carried out by an authorized plumber, and any modifications to the water connections must be approved by a plumber. The operating voltage of the unit is either 400V or 230V, and it should be configured accordingly.

Product Usage Instructions

Inward Transport

Transport using lifting straps:
The unit must be stored in a dry environment to avoid damage to the electronics.

Transport using pallet truck:

• Place the unit on a pallet truck.
• Ensure that the dimensions of the unit are as follows: L=100mm, L=100mm.

Operating the door locks:

• To unlock the unit, turn the door lock to the unlocked position.
• To lock the unit, turn the door lock to the locked position.
• Both the unit and control cabinet should always be locked.

If a door needs to be removed:

• Refer to chapter 10, Reference data page 29 for the dimensions and component weights.
• Make sure that the tagged washer is mounted to ensure electrical grounding.

See the following documents for further information about the product:
118076 automatic control instructions
118109 wiring diagram
For spare parts, see www.flexit.com

• This device may be used by children aged 8 and over,
  by people with physical, sensory or mental functional impairments and by people who lack experience or knowledge, provided that they are supervised or have been instructed in how to use the device safely and have been informed about and understand any risks.

• Children may not play with the device.

• Children may not perform cleaning and user maintenance without supervision

Symbols used
These products bear a number of symbols used for labelling the actual product and in installation and user documentation.

DANGER! When a text box is this colour, it means that a life-threatening or serious personal injury may be the consequence of not following the instructions.
NOTICE! When a text box is this colour, it means that a poor utilisation ratio or product operating issues may be the consequence of not following the instructions.
CAUTION! When a text box is this colour, it means that material damage may be the consequence of not following the instructions.
INFO! When a text box is this colour, it means that it contains important information.

SAFETY INSTRUCTION

• To avoid the risk of fire, electric shock or injury, read all the safety instructions and warning texts before using the unit.
• All electrical connections must be carried out by qualified electricians.
• The unit must not be used to extract combustible or flammable gases.
• It is the installer’s responsibility to carry out a full safety and function assessment of the appliance.
• All electrical power to the unit must be shut off before carrying out service or maintenance, including cleaning:
  • Switch off the unit in the following menu on the handheld terminal: ’Start page > SERVICE SWITCH > Off’.
  • Wait until the unit has stopped.
  •  Switch off the all-pole switch.
• This unit is only designed for ventilation air in homes and commercial buildings.
• To maintain a good indoor climate, comply with regulations and avoid condensation damage, the unit must never be stopped apart from during service/maintenance or in connection with an accident.
• The unit must not be operated without the filters being in place.
• All plumbing work must be carried out by an authorized plumber.
• The location of the water battery must be approved by a plumber owing to the risk of water leaks.
• Check whether the unit’s operating voltage is 400V or 230V.
• The electric battery must be configured in accordance with the operating voltage.

 Items included

Inward transport

• Transport using lifting straps

The unit must must be stored in a dry environment to avoid damage to the electronics.

• Transport using pallet truck
  

• Operating the door locks

  • unlocked
  • locked

Unit and control cabinet are always to be locked.

• If a door needs to be removed
  INFO! The dimensions and component weights are found in chap.

• Reference data page 29.
  

Rebuilding the unit models

Finalization of right model

Configuration for left model

Assembly

The unit must be placed in a dry location protected from the weather.
INFO! The space required for the servicing of the model is described in chap. 10.2. Space requirements page 29.

Control cabinet
Wall mounting

Mounting to unit
CAUTION! The communication cable and power cable must be at least 30 cm apart.

Connection of sensors
The sensors must not be positioned in, or in the vicinity of a duct bend.

Supply air sensor (B1)
INFO! Refer to the separate connection instructions on the inside of the sensor box.

Outdoor air sensor (B4) and extract air sensor (B3)

Electrical work

All electrical installations and cabling must be installed in compliance with relevant regulations by an authorised electrician.
Ensure that the unit is disconnected from the power supply before maintenance and/or electrical works.
The unit must be disconnected before an insulation test on the property.
The power supply to the unit must be connected via an all-pole safety switch with at least 3 mm switching distance. This is not part of the supply from Flexit.

Main supply (mains cable)
See section 15 Technical data for dimensions of fuses and connection cables. See also chap. 8. Main connection page 26 for more information about connection to 3N~400 V versus 3~230 V.

Earth-leakage circuit breaker

Main connection
Incoming electrical cables are connected to the terminal below, which is adapted to the relevant mains network. 3 N~400 V is standard. The unit can be converted to 3~230 V. This applies only in Norway.

Commissioning

The unit must not be started until all documentation has been studied and all electrical fitting and plumbing work has been performed.
Refer to guideline 118076 for more information on start up and use of the control system.

1| Familiarise yourself well with the documentation for the automatic control system
---|---
2| Check that the network settings are correct. For 230V 3~Phase, the unit and electric battery (if installed) must be switched *.
3| Start the unit as described in the documentation for the automatic control.
4| Program the various operating times and speeds (possibly including stop)
5| Check that the correct temperature regulation and temperature settings have been selected. Are the sensors located correctly?
6| Check that the fans rotate freely.
7| If outdoor air dampers and extract air dampers are installed, check that they are working. The unit must not be operated with closed air dampers!
8| Check that all doors are properly closed.
9| Check that the heat recovery system works correctly.
10| If a heating battery is installed, check that the heat control is working correctly.
11| If the unit has a water battery, you must test the frost function. Cool the frost sensor to below 5 °C. The unit should stop and the air dampers close.

The electric battery is not preconfigured as either 230 or 400V.  It must always be jumpered when it is connected.

Adjustment of throttle dampers
Adjust the pressure balance over the rotor
To set the correct pressure balance over the rotor and minimize the risk of leakage between extract air and supply air, an adjustment air damper is fitted to the extract air muff on the unit. This can be adjusted to prevent extract air from leaking over to the supply air via the rotor.

Hoses for pressure measurement are installed inside (S models) the unit.

NOTICE! If the damper is not to be used, it should be removed from the unit – otherwise it may decrease the amount of air from the unit.

Connect the pressure gauge with the –hose to A (blue hose in the unit) and the +hose to B (red hose in the unit). Run the unit at the correct operating point for the system in question.
The negative pressure in the extract air part must be 0–20Pa higher than in the supply air part (the instrument must display negative pressure).
If it is not, adjust with air damper DA3 (on the extract air muff) until the correct pressure is reached.

Reference data
Weight

Space requirements
This is a minimum requirement that only relates to space for service needs. Individual countries’ statutory requirements for electrical safety may differ from this. Check which rules apply to your country.

General drawing

System drawing

EB1 CB1 PQ1

PQ2

| Heating battery, electrical
Cooling battery
Supply air fan pressure sensor,
Extract air fan pressure sensor

xOn circuit board in electrical compartment Only where use of electric battery
Only if water battery is installed
Not standard

The unit can only have one heating battery – water or electric.

Dimensioned drawing

Maintenance

General maintenance
All electrical power to the unit must be shut off before carrying out service or maintenance.

1. Switch off the unit in the following menu on the handheld terminal:
   Start page > SERVICE SWITCH – select OFF.

2. Wait until the unit has stopped.

3. Switch off the all-pole switch.

The system should be inspected regularly. This must be performed by qualified operating personnel.
The inspection should be performed twice a year, preferably in the spring and autumn.
If a water battery is used to heat the air, check the system for water leaks.
Listen for abnormal sounds and check for abnormal vibrations. Check at regular intervals that the air intake is free of snow and leaves.
The inspection and maintenance of fans, recovery systems, air dampers, filters and heating batteries are essential to achieve optimal performance.
Do not use detergent that is harmful to aluminum or the environment.

therefore usually necessary to clean the rotor. If it should however be necessary, dust can be removed with a soft brush. Further cleaning is possible by removing the rotor, spraying it with a grease solvent and then blowing it clean from the opposite side. Distance approximately 60 mm and max. pressure 8.0 bar. Check the drive belt and tighten it if necessary. Check that all seals around the rotor are intact and tight.| Where required
Damper| The air damper plates are suspended in plastic bearings and do not need lubrication. The individual air damper plates are connected via an arm system that does not need lubrication either. Check every year that the air damper is tight. If the air damper is not properly tight, it can be corrected by adjusting the air damper motor or possibly adjusting the arm tension.| Check once a year
Filter| How frequently filters need replacing depends on the dust concentration in the air that passes through the filters. It is very important to replace filters to ensure that the system works properly. Filters must be replaced when the filter replacement lamp on the control panel lights up. They must be replaced at least once a year.| 1-2 times a year
Electric battery| Inspect the cables to the electric battery at least twice a year. Check for damaged cables and components. Check tighten all terminal blocks for power supply to the electric battery (elements, contactors, SSR) and other terminal blocks.| Twice a year
Water battery| The water battery will be exposed to dirt very rarely, as the system has filters fitted with a high tightness class. If cleaning still is necessary, you can use compressed air, which is blown in the opposite direction to the air flow, or a vacuum cleaner with a soft nozzle. Cleaning must be done carefully to ensure that the battery’s fins are not damaged.|
Fans| The fans will be exposed to dirt very rarely, as the system has filters fitted with a high tightness class. If cleaning still is necessary, you can use compressed air, which is blown in the opposite direction to the air flow, or a vacuum cleaner with a soft nozzle. Cleaning must be done carefully to ensure that the battery’s fins are not damaged.| Where required

Replacing filters
CS 2500 filter alarm
1-2 times a year

Technical data

| η| SFP| Duct resistance| Airflow
---|---|---|---|---
PERFORMANCE| > 83 %| < 2.0| 200 Pa| 2 400 m3/h
| > 86 %| < 1.5| 200 Pa| 1 550 m3/h
| | S220R with electric battery| S220R with water battery
---|---|---|---
POWER| Rated voltage (AC 50 Hz)| 400V| 400 V
| Frequency| 50 Hz| 50 Hz
| Recommended fuse size| 3 x 20 A| 3 x 10 A
| Rated current| 13,7 A| 4,2 A
| Rated power, total| 8310 W| 1 710 W
| Rated power, max. electric battery| 6600 W| –
| Rated power, fans| 2 x 750 W (230 V)| 2 x 750 W (230 V)
| Rated power, rotor motor| 40 W| 40 W
VENTILATION| Fan type| B-wheel| B-wheel
---|---|---|---
| Fan motor control| ModBus| ModBus
| Fan speed, max. RPM| 3 000| 3 000
| Automatic control, standard| CS 2500| CS 2500
| Filter class| ePM1 55% (F7)| ePM1 55% (F7)
| Filter type (supply air/extract air)| Compact filter| Compact filter
DIMENSIONS| Filter dimensions (W x H x D)| 892x287x370 mm| 892x287x370 mm
---|---|---|---
| Gross unit weight| 280 kg| 280 kg
| Net unit weight inward transport| 135 kg| 135 kg
| Weight, fan| 2 x 15 kg| 2 x 15 kg
| Weight, rotor| 51 kg| 51 kg
| Weight, doors| 4 x 16 kg| 4 x 16 kg
| Duct connection| 500×250 mm| 500×250 mm
| Height| 1420 mm| 1420 mm
| Width| 1630 mm| 1630 mm
| Depth (with handle)| 1130 mm| 1130 mm
| Depth (without doors)| 895 mm| 895 mm

ProNordic S220R:
K factor for the fans: 80

Capacity and sound data
For control and calculation of SFTINT and SFPLimit use FlexitSelect.

Supply air side

Extract air side

Using the capacity diagram:
A diagram consists of a number of curves and axes which allow various types of data to be read off for the unit.

1. Capacity curves (blue)
   These curves show the total available pressure and the air flow rate characteristic for the unit. The available pressure is read off to the left of the diagram. The air flow rate is read off in m3/h at the bottom of the diagram and in l/s at the top of the diagram.
   The various curves indicate different settings in %applied (0 – 100% = 0 – 10 V).

2. Operation curves (black)
   These curves show how air flow rate and pressure change at different operating levels (fan speed).

3. Power consumption curves (green)
   These curves show energy consumption for the fan at each operating level in watts. The power consumption is read off the scale to the right of the diagram. The various curves indicate different settings in % applied (0 – 100%= 0 – 10 V).

4. Sound curves (red)
   These curves indicate values for the sound power level LwA of the duct at the various operating levels. To find the sound power level of the duct in the various octave bands, take the value read off in the diagram and correct it using the values in the table below the diagram for each octave. This produces the sound power level per octave.

5. Correction axes (light green)
   Here you can read off the change in pressure when a water battery is used for heating. This pressure drop
   is deducted from the available pressure. This pressure increase is added to the available pressure.

Data for supply air is measured in accordance with ISO 5136, the “In-duct method”. Radiated sound is measured in accordance with ISO 9614-2. Bruel & Kjær measuring equipment, type 2260.

Correction factor for Lw

Complaints

Warranty claims will only be valid if the instructions in the manuals have been followed.
This product is covered by warranty in accordance with the current terms of sale, provided that the product is used correctly and properly maintained.
The warranty may be rendered invalid if the system is used incorrectly or maintenance is grossly neglected.
Complaints resulting from incorrect or defective installation must be submitted to the installation company responsible.

Filters are consumables.
Our products are subject to continuous development and we therefore reserve the right to make changes.
We also disclaim liability for any printing errors that may occur.

Waste handling
The symbol on the product shows that this product must not be treated as household waste.
It must be taken to a collection point for recycling electrical and electronic equipment. By ensuring correct disposal of the equipment, you will help to prevent negative consequences for the environment and health that incorrect handling may entail.
For further information on recycling this
product, please contact your local authority, your refuse collection company or the company from which you purchased it.

CE Declaration of Conformity

This declaration confirms that the products meet the requirements in the following Council Directives and standards:

• 2014/35/EC Low-voltage Directive (LVD)
• 2006/42/EC Machine Directive (Safety)
• 2014/30/EC Electromagnetic compatibility (EMC)
• 2011/65/EU RoHS Directive
• 2015/863/EU
• 2009/125/EC Ecodesign Directive

Our products have been tested in accordance with parts of:

• 1253/2014/EC Ecodesign Regulation
• Producer: FLEXIT AS, Televeien 15, 1870 Ørje, Norway
• Type: ProNordic S220R Ventilation Unit

Compliance with valid versions of the following standards on the date on which the declaration of conformity was signed:

Safety standard
– General requirements| EN 60335-1: 2012; A1, A2, A11, A13, A14
Safety standard

– Particular requirements

| EN 60335-2-80:

2003; A1; A2

EMF standard| EN 62233: 2008
EMF standard – General requirements| EN 61000-6-1
EMF standard – Particular requirements| EN 61000-6-3
Acoustics – Radiated sound| EN ISO 3741: 2010
Ventilation for buildings

– Rating and performance for units, components and sections

| EN 13053: 2019
Ventilation for buildings
– Mechanical performance| EN 1886: 2007

Product and Environmental Declaration
Materials:
Materials with which the user or treated air come into contact:

• The unit’s outer walls are made of aluzink coated steel.
• The rotary wheel-type heat exchanger is made of aluminum.
• Miscellaneous electric cables with PVC insulation.
• Electric motors consisting of galvanised steel, aluminum and copper.
• Heating elements made of steel.
• Air filters of glass fiber, cardboard and melting glue.

Other materials that may occur in small quantities:

• Acrylic sealant
• Polyethylene foamed plastic
• EPDM rubber gaskets/PUR
• Miscellaneous steel screws, nuts and pop rivets, plus small quantities of copper and brass.

Materials in the unit with which service personnel may come into contact:

• Plastic-insulated electric cables
• Miscellaneous other electrical components
• Insulation of type Rockwool mat (insulation mat)

Safety:
Materials:
The materials are considered to be completely harmless to users.

Use:
The unit is an electrical appliance which must be made dead before service and inspection. The unit also contains rotating motors that must have time to stop before the inspection door is opened, plus heating elements with a high operating temperature.

Flexit AS, Televeien 15, N-1870 Ørje
www.flexit.no

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