Systemair Topvex SC, TC Air Handling Unit Installation Instructions

1 Product Information

This manual provides essential information for installing the Topvex SC, TC heat recovery units manufactured by Systemair Sverige AB. The units feature Constant Air Volume (CAV).

Models:

• Side connected: Topvex SC20, SC25, SC35, SC60, SC70
• Top connected: Topvex TC20, TC25, TC35, TC60, TC70

Options:

• Electrical cabinet & supply air intake position: R (Right side) or L (Left side)
• Defrosting method: B (Bypass defrosting) or S (Section defrosting)
• Heater option: EL (Electrical heater) or HW (Hot water heater) or None
• Fan impeller: Composite or MO (Aluminium)

EL Heater Options:

HW Heater Options:

• HWH (High power)
• HWL (Low power)

For safe and proper operation, thoroughly read this manual, follow guidelines, and adhere to all safety requirements. For accessories not included, consult their separate instructions.

2 Warnings

The following admonitions are used throughout the document:

[Danger]: Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury.

[Warning]: Indicates a potentially hazardous situation that may result in minor or moderate injuries.

[Caution]: Indicates a risk of damaging the product or preventing optimal operation.

Important Notes:

• This appliance can be used by children aged 8+ and persons with reduced capabilities if supervised or instructed on safe use and hazards.
• Children must not play with the appliance. Cleaning and maintenance by children require supervision.

3 Unloading from Trailer

[Warning] The unit is heavy. Handle with care during transport and installation to avoid pinching injuries. Use protective clothing. Observe the center of gravity during transportation.

Air handling units are fixed on a pallet. Topvex SC60, SC70, TC60, TC70 are delivered in sections, secured with a packing belt.

3.1 Lifting Unit with Forklift Truck

Unload the unit from the trailer using a forklift truck with sufficient fork length, preferably from the short side. Longer forks are needed for unloading from the long side.

3.2 Using Lifting Frame

[Warning] Secure the lifting cable on the tubes. Do not compress the unit's chassis with the cables.

Use a lifting frame connected to pipes in the unit's feet. For Topvex SC/TC20-35, place lifting tubes in the outer feet. For SC/TC60-70, lift sections individually using the lifting frame and placing tubes in the feet. Attach lifting cables to the tubes.

4 Transport and Storage

[Danger] Do not loosen the packing belt until the air handling unit is in its installation location.

4.1 Storage

Store the unit protected from dust, rain, and snow. Keep duct connections covered during storage and installation.

5 Unpacking

Remove the plastic covering from the air handling unit. The NaviPad and one handle are packed on top of the unit. The supply air sensor, remaining handles, mounting feet, and drainage pipe with drain trap are enclosed inside the unit.

6 Duct Connections

6.1 Topvex SC

Diagram showing the Topvex SC unit with numbered components related to duct connections. The diagram indicates:

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

6.2 Topvex TC

Diagram showing the Topvex TC unit with numbered components related to duct connections. The diagram indicates:

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

7 Installation

Topvex SC, TC units are designed for indoor installation. It is recommended to place the unit in a separate room such as a storage area, laundry room, or attic.

Before starting installation, verify that all ordered equipment has been delivered. Report any discrepancies to the Systemair supplier.

On location for installation:

• Remove screws securing the unit to the pallet and loosen the packing belt.
• Unload the air handling unit section by section. Use a pallet lift for the left and right sections from the short side, and move the middle section from the long side of the pallet.

Before putting into operation:

• Install all enclosed parts properly.
• Remove all packing material from the unit.

7.1 Requirements for Installation

[Warning] The unit is heavy. Exercise caution during transport and installation to prevent pinching injuries. Wear protective clothing.

Location for Installation:

• Ensure the floor surface is level. The unit must be completely level before operation.
• Position the outdoor air intake on the northern or eastern side of the building, away from other exhaust outlets.
• Ensure inspection doors are accessible for maintenance.
• Provide sufficient free space for opening doors and removing components for service (refer to dimension drawings).
• Avoid placing the unit directly against a wall. If unavoidable, insulate the wall carefully.

Electrical Requirements:

• Do not cut off the mains power supply to the unit if it is installed in a cold area.
• Protect electronic components from temperatures below 0°C and above +50°C.
• An all-pole circuit breaker with a minimum 3 mm gap must be installed before the unit's electrical connection to the mains power supply.
• Connect the unit electrically to the mains power supply via a safety switch (available as an accessory). Connect wiring to the internal electrical connection box, following the enclosed wiring diagram.

Before Operation Checklist:

• Remove and install all enclosed parts.
• Connect ducts and provide necessary protection.
• Remove all packaging material from the unit.
• Close all doors.

7.2 Disassembly Size SC 60-70, TC 60-70

The middle section can be disassembled for transport through smaller openings (minimum 900 mm). The heaviest part is the heat exchanger (48 kg x 2).

Tools Required:

• Allen key, 8 mm (5/16")
• Torx 20
• Screwdriver
• Drive pin punch

[Warning] Disassembly requires more than one person for safety. Ensure stable ground during disassembly.

Remove the Doors:

1. Remove the cover over the hinges using a screwdriver.
2. Remove the hinge pins.
3. Remove the doors from the front and back sides.

Remove Damper:

[Warning] Beware of sharp edges. Use gloves and protective clothing.

4. Loosen the bolts holding the damper rails and remove the rails.
5. Rotate the damper and lift it away from the exchanger.
6. Lift the damper out of the middle section.

[Caution] Do not drag the damper on the exchanger.

Remove Rail Holding the Exchanger:

7. Loosen the bolts holding the rail on the opposite side of the partition wall.

Remove Middle Door Beams:

8. Loosen and remove the screws on the door beams (6 screws on the front and 6 on the back) and remove the beams.

Remove the Roof:

9. Remove the cabling from the roof part.
10. Loosen and remove the 8 screws for the roof's outer beams.
11. Remove the roof.

[Warning] The roof part is bulky; two persons are needed.

12. For weight reduction, remove the upper partition wall (remove band anchors for cabling).

Remove the Beams:

13. Loosen and remove the 8 screws for the floor on the outer beams.
14. Loosen and remove the 8 screws on the reinforcement struts.

15. Remove the beams.
16. The beams can be disassembled further.

Remove the Heat Exchanger:

[Caution] Handle the heat exchanger with care. The heat exchanger is heavy.

17. Remove the heat exchanger and bypass.

7.3 Assembly of Topvex SC60, Topvex SC70

Attach the Heat Exchanger:

[Caution] Handle the heat exchanger with care. The heat exchanger is heavy.

1. Carefully place the heat exchanger and bypass on the bottom plate.

Fasten the Beams:

1. Fasten the beams with the 8 screws on the reinforcement struts.
2. Fasten the floor's 8 screws on the outer beams.

Fasten the Roof:

[Warning] The roof part is bulky; two persons are needed.

4. Fasten the roof's outer beams with 8 screws.
5. Fasten the cabling to the roof.

Fasten the Door Beams:

6. Fasten the door beams (6 screws on front and 6 screws on the back).

Fasten the Rail Holding the Partition Wall:

7. Fasten the bolts holding the rail on the opposite side of the partition wall.

Fasten the Damper:

8. Insert the damper in the area above the exchanger.

[Caution] Do not drag the damper on the exchanger.

9. Lift the damper with the short end on the rail at the outer beams. Observe the small hooks to secure the damper.
10. Fasten the damper rails with the bolts.

Mount the Doors:

11. Place the doors in position.
12. Unite the hinges and replace the pin.

Unite Unit Sections:

13. Unite the parts of the air handling unit using a pallet lift.
14. Open the middle doors and section doors.
15. Remove the filters for easy access.
16. Use an allen key on the side of the 8 connectors to lock the unit's sections.

Connect Cables:

17. From the inside, attach the quick connection cables between the sides and middle section. Cables are marked to facilitate correct connections.

Note: Observe the cable markings.

7.4 Connect the Condensation Drain

Connect the drainage pipe and drain trap on the exhaust air side at the bottom of the unit. Cut the drainage pipe to the required height, refer to Table 2.

(Normal conditions)

7.5 Mount the Supply Air Sensor

Mount the supply air sensor in the supply air duct. Connect it to the control unit CU27-C located in the Access control cabinet, following the table below. Other temperature sensors are factory-installed.

Diagram showing installed supply air sensor.

7.6 Insulate the Ducts

Insulate outdoor and exhaust air ducts against condensation. Ducts in cold rooms/areas require at least 100 mm of mineral wool insulation with a plastic diffusion barrier. Install additional insulation in areas with extremely low outdoor temperatures.

[Caution] Cover joints with insulation and tape thoroughly if the unit is installed in a cold place. Keep duct connections/ends covered during storage and installation. Do not connect tumble dryers to the ventilation system.

7.7 Silencer

Install silencers on both supply and extract air ducts to minimize fan noise transference. Install silencers before each inlet diffuser to prevent noise transference between rooms.

8 Electrical Connections

[Danger] Disconnect the mains power supply to the unit before performing any maintenance or electrical work. All electrical connections must comply with local rules and regulations and be carried out by an authorized installer.

[Warning] The unit must not be operated until all electrical safety precautions have been read and understood.

8.1 Connect Mains Power Supply

Connect the mains power supply in the internal electrical connection box by unscrewing four screws to remove the hatch. Tripped fuses can be reset without opening the hatch.

8.2 Connect Power Supply to Electrical Re-heater

Connect the mains power supply to the re-heater. Fuse and overheat protection for EL units can be reset without opening the compartment hatch.

9 Access Control Cabinet

[Danger] Disconnect the mains power supply to the unit before moving the Access control cabinet or opening its lid.

[Warning] Before accessing terminals, all supply circuits must be disconnected.

The Access control cabinet is mounted on top of the unit but can be removed and mounted in a suitable location. An extension kit is available as an accessory.

9.1 CU27-C

All control via digital outputs is connected to CU27-C using the supplied cabling.

10 NaviPad Control Panel

The NaviPad is not designed for outdoor mounting. It has an IP54 protection class and a permitted temperature range of 0-50°C. Communication between the panel and the control unit in the Access control cabinet is possible with up to 100 meters of cable.

10.1 Connect NaviPad

Loosen the 6 screws on the lid of the Access control cabinet. Pull up the connection lid and the comb with plugs sealing the connection area. Release one plug to connect the NaviPad. Connect the NaviPad to the HMI inlet on CU27-C in the Access control cabinet.

Follow the on-screen instructions for calibration. Available air handling units will be displayed. Select the unit to pair with your NaviPad. Use the controller's serial number to ensure correct pairing.

If the start-up wizard is cancelled, it will restart upon the next power-up until successfully completed.

10.2 Password

• Operator mode: 1111
• Service mode: 0612

10.3 Dimensions NaviPad

The NaviPad is the control panel for Systemair's air handling units and supports multiple languages. Diagrams show dimensions A-F.

10.4 Mount NaviPad Holder on the Air Handling Unit

The NaviPad control panel, including a 3m cable, holder, and screws, is supplied with the air handling unit. Mount the holder using it as a drilling template. A suitable location is on one of the front doors.

10.5 User Levels

• End user (Logged out): Read/write access to the Home page. Allows stopping the unit for maintenance (e.g., filter exchange), changing extended run time, and temperature setpoints. Flow diagrams and active alarms are visible.
• Operator mode (Logged in with 1111): Read and write privileges (except Configuration). Allows acknowledging/blocking/unblocking alarms and viewing alarm history.
• Service mode (Logged in with 0612): Full read and write privileges.

10.6 Configuration Wizard

A configuration wizard is available in the configuration menu for common setup tasks.

Navigation: Configuration > Configuration wizard

Options include: Set up pressure control, Set up cooler, Set up change over. Option to exit to configuration menu or complete configuration wizard.

11 Additional Equipment

For information on additional external equipment such as valve actuators, motorized dampers, roof units, and wall grilles, refer to the technical catalogue and their enclosed instructions. For electrical connections of external components, consult the enclosed wiring chart and separate documentation.

12 Technical Data

12.1 Dimensions and Weight Topvex SC

Dimensions are provided in mm.

Topvex SC20, Topvex SC25

Diagrams showing dimensions for SC20/SC25.

Topvex SC35

Diagrams showing dimensions for SC35.

Topvex SC60, Topvex SC70

Diagrams showing dimensions for SC60/SC70.

Table 3 Weight Topvex SC

12.2 Dimensions and Weight Topvex TC

Topvex TC20

Diagrams showing dimensions for TC20.

Topvex TC25

Diagrams showing dimensions for TC25.

Topvex TC35

Diagrams showing dimensions for TC35.

Topvex TC60, Topvex TC70

Diagrams showing dimensions for TC60/TC70.

Table 4 Weight Topvex TC

Table 5 Electrical Data

Electrical data for various Topvex SC/TC models, including fan and re-heater inputs, voltage, power, current draw, and fuse ratings.

Table 6 M0 Motors

Electrical data for M0 motors.

1 Included controller 10A