EXHAUSTO VEX150CF Horizontal HCW with EXact2 Control Instruction Manual

EXHAUSTO VEX150CF Horizontal HCW with EXact2 Control

Product Information

The VEX150CF Horizontal HCW with EXact2 control is a product manufactured by EXHAUSTO A/S. It is designed for mechanical ventilation and is equipped with an EXact2 control system.

Product Usage Instructions

Chapter 1: Designations and Diagram
In this chapter, you will find simplified diagrams and designations used in these instructions for easy understanding of the product.

Chapter 2: Handling
This chapter provides instructions on how to unpack the VEX unit upon arrival and how to handle its transport, including passage through openings and internal transport with reduced weight.

Chapter 3: Mechanical Assembly
Here, you will find instructions on the installation of the VEX unit. It covers installation directly on the floor or on a mounting base. Additionally, it explains the establishment of a condensation outlet.

Chapter 4: Electrical Installation
This chapter focuses on electrical installation guidelines for the VEX unit.

Chapter 5: Maintenance, Hygiene, and Servicing
In this chapter, you will learn about operating readings via the HMI panel and maintenance procedures to ensure optimal performance and hygiene of the VEX unit.

Please refer to the complete user manual for detailed instructions on each chapter.
If you require further assistance or have any questions, please contact EXHAUSTO A/S at

• Tel.: +45 65 66 12 34 or
• email exhausto@exhausto.dk.
• You can also visit their website at www.exhausto.dk for additional information.

Symbols, terms and warnings

Prohibition symbol

Failure to observe instructions marked with a prohibition symbol may result in serious or fatal injury.

Danger symbol

Failure to observe instructions marked with a danger symbol may result in per- sonal injury and/or damage to the unit.

Scope

• This instruction manual is for use with EXHAUSTO VEX-type air handling units. Please refer to the product instructions regarding accessories and extra equipment.
• The instructions must be fully observed to ensure personal safety and to protect the equipment and ensure its correct operation. EXHAUSTO A/S accepts no liability for accidents caused by equipment not used in accordance with the manual’s instructions and recommendations.

Supply air/extract air

This instruction manual uses the following terminology

• Supply air
• Extract air
• Outdoor air
• Exhaust air

Accessories
The confirmation of order states which accessories are delivered with the VEX unit.

Definition
In the type designation R stands for Right, indicating that the supply air is to the right of the unit, as seen from the operating side. Supply air to the left is designated with L for Left

Warnings
Opening the air handling unit

Do not open the service doors until power has been disconnected at the isolation switch and the fans have stopped.

Lock the air handling unit during operation
The VEX unit must always be locked during operation

• Use the cylinder lock in the handle. Re-member to remove the key from the lock.
• Or use a padlock. Use the handle’s built-in padlock fixture

Information plate
The VEX unit rating plate shows

• VEX unit, type (1)
• production number (2)

NB
Always have the production number ready when contacting EXHAUSTO A/S.

Choose the correct documentation for the task…

Find your information.

Product information

Designations used in these instructions

Simplified diagram

Standard
MPT1, P1| Airflow control, extract air| Accessories
MPT1, P2| Airflow control, supply air| Accessories
MPT2, P1| Filter monitor, extract air| Accessories
MPT2, P2| Filter monitor, outdoor air| Accessories
MPT3, P1| Ice detection| Accessories
LS(F)/LS(F)R| Closing damper, outdoor air| Standard
LS(A)/LS(A)R| Closing damper, exhaust air| Accessories
BP1| Bypass damper| Standard
M1| Extract air motor| Standard
M2| Supply air motor| Standard
MC1| Motor controller, motor 1| Standard
MC2| Motor controller, motor 2| Standard
TE11| Temperature sensor, extract air| Standard
TE12| Temperature sensor, exhaust air| Standard
TE21| Temperature sensor, outdoor air| Standard
TE22| Temperature sensor, supply air| Standard
Tice| Temperature sensor for ice in exchanger| Standard
Main Board| Connection box for MVM, CP and TE-RPT-X and TE-SPT| Standard
MVM| Motor valve| Accessories
CP| Circulation pump| Accessories
TE-SPT| Temperature sensor on feed pipe to the heating coil| Standard
TE-RPT-X| Temperature sensor on external pipeline from water heating coil| Accessories

Application

• Comfort ventilation EXHAUSTO VEX is used for comfort ventilation tasks. Operating temperature range for the unit – see section “Technical data”.

Prohibited uses
The VEX unit is not to be used to transport solid particles or in areas where there is a risk of explosive gases.

Location requirements

Positioning
The unit is designed for indoor fitting. The unit can be ordered for outdoor fitting, in which case it is provided with a roof (accessory VEX100OD).

Space requirements
The drawing below indicates how much space is needed for opening the doors and servicing the unit, e.g. changing filters, cleaning, servicing, etc.

NB
For servicing, the VEX must have a free height of at least 300 mm above the connection box.

Requirements for underlying surface
When fitting the unit directly to an existing surface – i.e. without using the mounting base (accessory) -the surface must be

• flat
• level (+/- 3 mm per metre)
• hard
• resistant to vibration

Condensation outlet
A condensation outlet must be installed in the immediate vicinity of the unit. See also “Mechanical assembly” section.

Requirements for duct system

Silencers
The duct system must be fitted with silencers specified by the Project Manager, which meet the requirements of the operating area.

Bends
A duct bend may be fitted immediately after the unit, because the airflow in the spigot has a uniformly moderate speed profile, which results in negligible system pressure loss.

Insulation
The duct system must be insulated against

• condensation
• sound leakage
• heating/cooling losses

Condensation
Condensation in the ducts may occur when the exhaust/outdoor air has high humidity. EXHAUSTO recommends a condensation outlet is also fitted at the lowest point in the ducts.

Outdoor air intake
The outdoor air intake must be dimensioned with sufficiently low airflow to prevent rain and snow being drawn into the duct system.

No duct connection
If one or more of the spigots is not connected to a duct: Fit a protective net to the spigots with a maximum mesh width of 20 mm.

Description

VEX unit construction
The following drawings show an overview of the construction of left and right- hand models of VEX units (shown without doors).

top of the air han- dling unit (2.1.B)
2| Closing damper LS| LSF, outdoor air closing damper
3| Outdoor air filter| Filters outdoor air.
4| Bypass damper| For operation with heat recovery, the bypass damper is closed so that the air passes through the counterflow heat exchanger. For bypass operation, the damper is open, and the air bypasses the heat exchanger.
5| Spigot 1,1,A| Extract air spigot
6| Condensation outlet| Channels condensate to the drain.
7| Extract air filter| Filters extract air.
8| Counterflow heat exchanger| Conducts heat from extract air to supply air.
9| Condensation tray| Collects the condensate and drains it away from the counterflow heat exchang- er to the condensation outlet
10| Water heating coil with bleed screw| Heats supply air if heat recovery is insufficient.
11| Spigot, 2,2,A| Supply air spigot. The spigot can also be positioned at the bottom of the air handling unit (2.2.B).
12| Supply air fan| For outdoor air/supply air.
13| MPT1 (AFC)| Airflow control (accessory).
14| Extract air fan| For exhaust/extract air.
15| Closing damper LS| Closing damper, exhaust air, LSA (accessory).
16| Spigot 1,2,A| Extract air spigot The spigot can also be positioned on the top of the unit (1.2.B).
17| Isolation switch| Connects/disconnects current.
18| Connection box| Connection of accessories.
19| Terminal row| Connection of accessories to ventilation unit.
20| Bypass motor| Opens/closes bypass damper.
21| Extraction plate| Positioning of motor control components.
22| EXact2 control| Control system.
23| MPT3 (DEP)| Ice detection – measurement of pressure in supply air duct (accessory)
24| MPT2 (MPTF)| Filter monitor (accessory).
25| HMI panel| Control panel.

Parts of the VEX unit

Cabinet
The inside and outside of the cabinet are made of Aluzinc® The cabinet has been insulated with 50 mm mineral wool.

Fans
The unit contains two centrifugal fans with backward curved blades for extract air and supply air.

Counterflow heat exchanger
The counterflow heat exchanger in the unit is mounted with a modulating bypass damper. The counter-flow heat exchanger can be removed and cleaned.

Filters
The unit includes integral panel filters for both extract air and supply air.

Principal dimensions

VEX150H, Left
The following drawing gives the principal dimensions

NB
The drawing shows all of the spigot positioning options.

• • Allow a distance for service in front of the unit equivalent to the unit depth.
• ** Allow a min. of 300 mm free height for service.

VEX150H, Right
The following drawing gives the principal dimensions

NB

The drawing shows all of the spigot positioning options.

• • Allow a distance for service in front of the unit equivalent to the unit depth.
• ** Allow a min. of 300 mm free height for service.

Handling

Unpacking
Once the VEX has arrived

• Check the air handling unit and any supplied accessories for any transport damage immediately on arrival at the assembly site.
• Check that the delivery is complete.

If there is damage or something is missing, point this out immediately to the haulier.

Delivery
The following components are supplied

• VEX unit
• Accessories supplied

Packaging
The unit is delivered on a disposable pallet and packed in clear plastic.

NB
Once the plastic has been removed, the unit must be protected against dirt and dust

• The covers on the spigots must not be removed until the spigots are connected to the ventilation ducts.
• Whenever possible, keep the unit closed during fitting.

The unit should be cleaned before it is used.
Once the VEX unit is fitted, it must be checked and thoroughly cleaned. All dust, debris and metal shavings must be vacuumed up.

Transport

Transport
Transport the VEX unit on the disposable pallet. Do not lift it with the spigots or connection box.

Transport methods
Transport the VEX unit in one of the following ways

Pallet truck or fork-lift truck

Lift the VEX unit on the disposable pallet. IMPORTANT : If the disposable pallet cannot be used, the forks on the lifting equipment must be long enough to pre- vent damage to the bottom of the unit.

| RD10248-01
Crane

Never lift the VEX unit with the lifting brackets by us- ing a crane.

Use straps and lifting yokes to prevent damage to the unit.

| RD13391-01

Passage through openings

Height
VEX height is 1557 mm + any base spigot (+62 mm).

Width
The list below shows how wide the opening has to be for the VEX unit to pass through

• • Measurements are based on the exact dimensions of the air handling unit

Internal transport with reduced weight

Removing the serv-ice doors
To remove the service doors

• Open both doors.
• Using a small punch or similar tool, knock the pin out of the top of the door hinges (A), and lift the doors off.

Weight reduction
The air handling unit’s weight can be reduced during transport by removing service doors, fans and counterflow heat exchanger. The table below shows how much weight can be reduced by removing the various parts.

To remove the fan unit

RD13899-01

Step| Action
1| Remove the fixing screw from the sliding rail, and release the ties on the motor cable.
2| Pull the fan unit out to the stop (two screws) on the sliding rail.
3| Dismount the motor cable from the motor control on the sliding panel and pull it towards the motor through the rubber grommets.
4| Remove the two sliding rail screws. The fan unit can now be lifted off.

Removal
See section “Maintenance” for instructions for dismounting fans and counterflow heat exchanger and for removal of filters.

Mechanical assembly

Installation

Description
It is important that the VEX is installed on a level surface, as this affects the collection and draining of the condensate.

Installation directly on floor
The requirements for the floor surface must be met, see the section entitled “Requirements for underlying surface”.

NB
After installation, check the VEX unit is completely level.

Installation on mounting base
The EXHAUSTO mounting base enables the VEX unit to be installed correctly. The base is equipped with adjustable levelling screws, so that the air handling unit can be fitted horizontally on a surface that is not level ( +/- 20 mm per metre). See the separate instructions for installing the mounting base.

Condensation outlet
Connection of the condensation outlet must be made by an authorised plumber.
Drain the condensation outlet into a floor gully or similar. The condensation out-let must be fitted with a water trap. See below.

Risk of frost
Where there is a risk of frost: It is recommended to protect the condensation out-let against frost damage. Fit a SIPHONE electrical heat tracing device on the out-let before the pipes are insulated. For fitting, see the device’s fitting instructions.

Establishment of condensation outlet

Location
The following two drawings show examples of how the drain from the condensation outlet can be established and the correct dimensions for the water trap

• Solution with siphon water trap (accessory)
• The siphon water trap is easy to install and service.

Solution with HT pipe
Use HT pipe (HT, DN32, DIN4102), if the above solution is not employed (not supplied by EXHAUS-TO).

NB
If the VEX is erected on a mounting base, this will allow sufficient free height for installing a water trap.

Water heating coil

Principles for connecting the water heating coil

Mixing loop
The diagrams below are simplified. The dimensioning of valves, pipes, etc. and heating coil connection must always be carried out by authorised fitters in accordance with applicable regulations and legisla-tion.

EXact2-Control- (23)](https://manuals.plus/wp-content/uploads/2023/10 /EXHAUSTO-VEX150CF-Horizontal-HCW-with-EXact2-Control-23.png)

Mixing loop 2| Constant flow in the primary circuit (supply) and the secondary circuit (VEX unit)

a) When there is no heating require- ment, valve adjustment must be based on the required primary circuit water flow

|
| Do not connect the heating coil like this!

Connection without circulation pump risks frost damage!

| RD12900-03

Explanation of simplified diagram

• not EXHAUSTO delivery (refer to the technical specifications).

Bleeding of coils Bleeding
It is the responsibility of the contractor/customer to ensure that the bleeding option is correctly installed and that the building owner is informed of the risk of insufficient bleeding, regardless of whether the coil(s) in question are built into a ventilation system or mounted separately in the duct system.

The following must be observed when bleeding liquid-coupled coils/heating and cooling batteries

• The heating/cooling system must be arranged in accordance with DS469 so that they can be bled.
• Ventilation systems installed above suspended ceilings or outside on roofs are often the top point of the pipe system and therefore air is often collected in the system here.
• Bleeding points must be easily accessible.
• Bleeding points must be selected so that all air in the system can be bled.
• Air pots and automatic air vents should be considered so that air is collected before it enters the coils, despite the fact that many coils are equipped with a bleeding option.
• A lack of bleeding can lead to a lack of water flow and, ultimately, frost damage to the coils and subsequent water damage to the building.

Following connection of water supply to the unit
Bleed the system thoroughly using the upper bleed screw on the water coil.

Bleeding of coils

Bleeding
It is the responsibility of the contractor/customer to ensure that the bleeding option is correctly installed and that the building owner is informed of the risk of insufficient bleeding, regardless of whether the coil(s) in question are built into a ventilation system or mounted separately in the duct system.

The following must be observed when bleeding liquid-coupled coils/heating and cooling batteries

• The heating/cooling system must be arranged in accordance with DS469 so that they can be bled.
• Ventilation systems installed above suspended ceilings or outside on roofs are often the top point of the pipe system and therefore air is often collected in the system here.
• Bleeding points must be easily accessible.
• Bleeding points must be selected so that all air in the system can be bled.
• Air pots and automatic air vents should be considered so that air is collected before it enters the coils, despite the fact that many coils are equipped with a bleeding option.
• A lack of bleeding can lead to a lack of water flow and, ultimately, frost damage to the coils and subsequent water damage to the building.

Following connection of water supply to the unit
Bleed the system thoroughly using the upper bleed screw on the water coil.

Insufficient bleeding
Insufficient bleeding can result in still water forming in the system, which may result in frost-induced leaks during the winter.

Fitting motor valve

• The valve must not be fitted with the motor facing down

Insulate the supply pipe and heating coil
The pipes and heating coil must be insulated according to applicable regulations

MVM valve

Definition
MVM is used as a general term for an engine valve.

Screening
Screen the valve motor from direct sunlight. Due to heat emissions, the valve motor must not be en-capsulated (max. ambient temperature: 50°C).

Insulating the valve
To ensure normal operation at ambient temperatures below 0°C, it is very important that the valve sec-tion is insulated according to current standards/procedures.

MVM-OD, valve for outdoor fitting
If MVM-OD (MVM intended for outdoor fitting) is used, the screening and insulation are part of the de-livery. MVM-OD is only possible for valve sizes below 6.3 Kvs.

Regulating proper-ties
Optimal regulation is achieved when the differential pressure is between 5–20 kPa. See section “Tech-nical specifications” to calculate Kvs.

Heat supply
The heat supply must be constant.

Exercise cycle of circulation pump
The circulation pump is exercised with the EXact2 control, as described here

1. When no heating is required, the MVM valve operates at 0%.
2. The circulation pump then runs for a further 5 min and then stops.
3. EXact control starts the 24 hour timer.
4. When the 24 hours have passed, the circulation pump performs an exercise cycle for 5 min.
5. The exercise cycle is repeated once a day until there is no heating requirement.

Electrical installation

Electrical installation
See the attached instructions “Guide to Electrical Installation of VEX100 CF with water heating coil and EXact2 control system”:

Original instructions

• EXHAUSTO A/S
• Odensevej 76
• DK-5550 Langeskov
• Tel.: +45 65 66 12 34
• Fax: +45 65 66 11 10
• exhausto@exhausto.dk
• www.exhausto.dk

Maintenance, hygiene and servicing

Operating readings via the HMI panel

HMI panel
Refer to the “EXact2 Control System Basic Instructions for VE100/100CF” for instructions on accessing Menu 2 “Operation displays” via the technician menu (access code 1111) to check the unit’s operating status.

Maintenance

Overview of maintenance intervals
The following chart details the recommended maintenance intervals for the VEX. The intervals are a guide and based on normal operation. EXHAUSTO recommends maintenance is adjusted to match the actual operating requirements.

Recommended that both filters are replaced at the same time. NB: The control system can issue a warning when the filter is be- coming soiled.
Filters should be replaced at least:

|

X

|
Filter monitor| Check that all the seals in the filter monitor are tight.| | X
Seals and sealing strips| Check that all the seals are tight.| | X
Fan|

• Check that the fan impeller is securely fixed to the shaft. Re- moval of fan unit. See section “Internal transport with reduced weight”
• Cleaning. See section “Servicing and cleaning”

| | X
Counterflow heat exchanger| Clean the heat exchanger. See section “Cleaning of counterflow heat exchanger”| | X
Bypass damper| Check damper function| | X
Heating coil| Clean the heating coil. See section “Cleaning of heating coil”| | X
Safety functions check|

• Fire thermostat check
• Temperature sensors on heating pipes

| | X
Closing damper| Check damper function| | X
Condensation outlet| Check that the outlet functions by pouring water in the condensation tray| | X
Motor valve/circulation pump| Check function| | X

Filters

Only use original EXHAUSTO filters

• The provided filter data (section “Technical data”) are based on the use of original EXHAUSTO filters
• Eurovent certification is only valid if original filters are used.
• Use of non-original filters may cause leakage in the VEX unit, impair filter function and cause an extraordinary pressure drop.
• EXHAUSTO recommends that you register the filter replacement date to ensure filters are re-placed at the correct intervals.

Hygiene (VEX100VDI only)

VDI6022 air hygiene standard
To ensure that the VEX100 meets the requirements of the VDI6022 hygiene standard, its design ensures that

• bacterial growth and dirt accumulation are minimal
• conditions for cleaning are optimum

Filter ePM1 55%
The outdoor air side of the unit must as a minimum be fitted with an ePM1 55% filter (F7) to meet VDI 6022 requirements.

Servicing and cleaning

Filter change

• Disconnect power at the isolation switch before opening the door.
• Pull the filters out. Remember to check the flow direction – see the arrows on the filter.
• Discarded filters must be stored immediately in sealed plastic bags and disposed of responsibly.
• After filter change (timer operation only) : Go to menu 8.1 in the EXact control system and select “Yes” next to filter change to reset the operating days counter.

Filter change in menu 8.1

Cleaning the fans

opening the doors.
2| Pull out the fan section: Release the fixing screw on each sliding rail and undo the ties on the motor cables. Pull the fan unit out to the stop (two screws) on the sliding rails.
3| Clean the fan impeller with a vacuum cleaner and wipe down with a damp cloth if necessary. Clean the blades on the fan impeller carefully to avoid disrupting the balance If there are weights on the fan impeller, these must not be removed.
4| After cleaning the fan impeller, check that the unit does not vibrate when operating.

Cleaning the heating coils

opening the doors.
2| Vacuum clean the heating coil
3| Check that the fins on the heating coil are not deformed.

**** The fins are sharp.

Removing and cleaning the counterflow heat exchangers

Warnings
Disconnect power at the isolation switch before opening the doors.

• Take care, as the counterflow heat exchanger is heavy – (see weight under Technical Data)
• The counterflow heat exchanger fins can be easily damaged – avoid contact with the fins when handling.

Cleaning the counterflow heat exchanger

**** Hold down the split pin under the plug using a screw driver as shown on photo

**** Then remove the plug

|
2| Carefully remove the bypass (do not wrench it out)|
Step| Action
---|---
3| Make sure the Tice sensor/fitting is free of the counterflow heat ex- changer before extracting it.| ****
4| Remove the counterflow heat exchanger all the way.

**Note the weight of the heat exchanger, see technical data – min. two people when lifting.**

| ****
5| Clean the counterflow heat exchanger by flushing with hot water or by pressure hosing.

**** Max. water temperature 90°C.

6| Replace the counterflow heat exchanger and then the bypass. Check that the Tice sensor is correctly positioned between the heat exchanger fins, as the sensor will not measure correctly otherwise.| ****
7| Re-insert the plug for the bypass motor.

Technical data

Weight, corrosion class, temperature ranges, etc.

Weight

kg

Corrosion class
Corrosion class C4 in accordance with EN ISO 12944-2

Temperature ranges

• At temperatures below -25˚C (with outdoor installation), use of a thermostatically controlled heater in the automated control box is recommended.

HMI panel

• At temperatures below 0˚C, the display may react more slowly than usual.

Fire thermostat

Temperature drop before reconnection possible min. 15°K

Motor damper

Motor damper type| LS (closing damper)| LSR (closing damper, spring return)
---|---|---
Type| LS400-24| LSR400-24
Designation| LSA/LSF| LSFR
Motor type| NM24-F| AF-24
Rotation time| 75–150 s| open: 150 s

close: 16 s

Ingress protection| IP42| IP42
Ambient temperature| -20ºC to +50ºC| -30ºC to +50ºC
Damper depth| 100 mm| 100 mm

• A maximum of two LSFR dampers or four LSA/LSF dampers may be connected.

Panel filters

**Data| VEX150| **

Device

---|---|---
ePM 10 50%| ePM 1 55%
Dimensions: h x w, 1 item per air direction| 577 x 732| mm
Panel filter thickness| 96| mm
Temperature resistant to| 70| °C
Filter class according to ISO 16890| ePM10 50%| ePM1 55%|
Filter class according to EN 779| M5| F7|

Final pressure drop For the final pressure drop over the filter, the lower of the following two methods is recommended.

• Final pressure drop = 3 x initial pressure drop
• Final pressure drop = initial pressure drop + 100 Pa

Water heating system

Water heating coil

| | HCW
---|---|---
Weight| Weight without fluid| 8.7 kg
| Water content| 2.2 l
Dimensions| Face area (h x b)| 425 x 655 mm
Data| Test pressure| 3000 kPa
| Max. operating pressure| 1000 kPa
| Number of rows of pipes| qty. 2
| Number of circuits| qty. 5
| Pipe connection| DN15 (½”)
| Fin spacing| 2.1 mm
| Permissible media temperature| 5..0.95℃

Recommendation
A precise calculation of the heating coil is recommended, to be carried out with calculation program EXselect, available on www.exhausto.dk.

MVM motor valve

24 VDC ±20%

| 24 VAC ±20%

24 VDC ±20%

Regulation| 0–10 VDC| 0–10 VDC

Capacity diagram

EC Declaration of Conformity
The document is located in the door of the VEX unit. It is also available on the EXHAUSTO website by searching under the document or order number.

Ordering spare parts

Find production number
When ordering spares, please state the relevant production part number. This will ensure that the correct parts are delivered. The production number is given on the front of the VEX guidelines and on the VEX rating plate.

Contact
Contact your local EXHAUSTO office service department to order a spare part. Contact information is given on the back cover of these instructions. See also the “Layout” section for an overview of the position and designation of parts in the VEX.

Environmental declaration

Environmental doc-umentation
The unit can be disassembled into individual product parts when worn out and in need of disposal.

incineration
Fan motors, bypass motors| Aluminium, steel, copper and plastic| Recycle after disassembly
Control unit| Electronic components| Recycle via an authorised enterprise
Panel filters| Fibreglass and plastic| For landfill waste or incineration
The air handling unit is supplied on disposable pallets| Wood| For landfill waste or incineration

Percentage weight

and 1% copper)

For landfill waste or in- cineration| 2% (Wood, filter paper, cellular rubber)
Other| 1.5% (electronic components)
Total| 100%

Scan code and go to addresses at www.exhausto.com

References

• Ventilationsanlæg med varmegenvinding, ventilationsløsninger af høj kvalitet til bolig, skole og kontor

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