General Maintenance Instructions; Construction Characteristics; Tac Technology Fans; About The Counterflow Air/Air Heat Exchanger - P.LEMMENS HRup 450 TAC5 Manuel D'installation Et De Maintenance

1. GENERAL MAINTENANCE INSTRUCTIONS

1.1 Construction characteristics

The structure is freestanding, the panels are 50mm (30 mm for HRup 450) double skin steel plates free of thermal
bridges. The outside panels are made out of pre-painted steel and the inside panels of galvanized steel. Thermal
and acoustical insulation is carried out by fireproof rock wool (Euroclass A1, EN 13501), in conformity with the
European environment standards, inserted between layers.
The HRup is mounted on a steel frame and is mono-structured.
All the access doors to the ventilators and filters are equipped with handles.
Air tightness:
Internal: Class 1 as per EN 13141-7.
External: Class 2 as per EN 13141-7.

1.2 TAC technology fans

The HRup series is equipped with TAC technology centrifugal ventilators. The TAC5 (DG or DT) 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.lemmens.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 RTU/MODBUS TCP-IP/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/HRup: IP44.
Nominal temperatures: -10°C/+55°C.
Conformy: CE (motors are also UL approved).
Before starting the unit
- 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 About the counterflow AIR/AIR heat exchanger

Protect the heat exchanger by regularly cleaning or replacing the filters.
To protect from frosting, the TAC5 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, except for
the HRup 450, and BAin).
The HRup units are specified not to exceed a frontal air speed on the heat exchanger of 2,2m/s.
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