General Maintenance Instructions; Construction; Tac Technology Fans; Counterflow Air/Air Heat Exchanger - Swegon CLASS UNIT TAC 5 Manuel D'installation Et De Maintenance

1. GENERAL MAINTENANCE INSTRUCTIONS

1.1 Construction

Le Class Unit is mono-structured.
The access panels are 30mm double skin steel plates insulated. The outside panels are made out of pre-painted
steel and the inside panel of galvanized steel. Thermal insulation is carried out by fireproof rock wool (Euroclass A1,
EN 13501), in conformity with the European environment standards, inserted between layers.
The inside of the unit has been conceived in order to optimize the acoustic insulation.
Air tightness:
Internal: Class 1 as per EN 13141-7.
External: Class 2 as per EN 13141-7.

1.2 TAC technology fans

The Class Unit is equipped with TAC technology centrifugal ventilators. The TAC5 DG control is specifically
developed to take advantage of this technology. Verify that the supplied voltage corresponds to the specification
of the ventilators and that the connection is made according to the supplied wiring instructions. See
www.swegon.com for more information on the advantages of the TAC technology.
Warning! : The starting up / stopping of the unit must be activated by using the softstop function on
K1/K2/K3 or via the RC/GRC/MODBUS/ETHERNET/KNX, and not by shutting off the power supply.
Always check the following electrical specifications:
Power supply voltage: 230VAC (210V<V<250V).
Power supply frequency: 50/60 Hz.
Grounding the unit is compulsory
The motor is self-protected against overloading. It is thus NOT necessary to install an electrical overload protection
device. See section 3.2 for detailed wiring instructions.
Insulation class
Fans/Class Unit: IP44.
Nominal temperatures: -10°C/+55°C.
Conformity: CE (motors are also UL approved).
Before starting the unit
- Verify if the fan wheel is rotating properly, without resistance?
- Verify if the installation and the connections are made according to the applicable European standards.
- Are the precautionary measures to avoid an accident taken? (Wiring, rotating parts, security measures,)
Operating conditions
The temperature over the fan motor cannot be lower than -10°C, or superior to 55°C. The unit is not designed to
operate in an aggressive or an explosive environment. It is strongly not advised to stop and start the unit more often
than every 5 minutes.

1.3 Counterflow AIR/AIR heat exchanger

Protect the heat exchanger by regularly cleaning or replacing the filters.
To protect from frosting, the TAC5 DG control is as standard delivered with an inbuilt heat exchanger antifreeze
system (by unbalancing the in and out airflows). There is also the modality of antifrosting protection of the modulating
by-pass and the pre-heater options available to accomplish this if deemed necessary (KWin and BAin).
The Class Unit is specified not to exceed a frontal air speed on the heat exchanger of 2,2m/s.
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