General Maintenance Instructions; Construction Characteristics; Tac Technology Fans - P.LEMMENS hrmural TAC 5 Manuel D'installation Et De Maintenance

1. GENERAL MAINTENANCE INSTRUCTIONS

1.1. Construction characteristics

The HRmural is mono-structured and its structure is made out of omega shaped anodized aluminum profiles
connected by reinforced polypropylene auto-extinguishable (M1) corner pieces. The panels are 15mm double skin
steel plates insulated. The outside panels are 0,8mm thick pre-painted (5µm primer + 20µm polyester)-gray
RAL 9002 color, covered with a plastic protection (to be removed after installation). The inside panel is 0,8mm
galvanized steel. This combination allows the exposure of the panels to outdoors conditions, and forms a rigid
structure. Thermal insulation is carried out by EPS panels, self-extinguishing (M1 class), in conformity with the
European environment standards, inserted between layers.
All the access doors to the ventilators and filters are equipped with handles.
Air tightness:
Internal: Class 2 as per EN 13141-7.
External: Class 2 as per EN 13141-7.

1.2. TAC technology fans

The HRmural series is equipped with TAC technology centrifugal ventilators, backward for ECO models and
forward for the other models. The TAC5 DM control is specifically developed to take advantage of this technology.
With ECO models, the percentage of maximum torque instead of the airflow is modulated and in order to work with
airflow modulation, as it is the case by default for all other models, the CA kit option (pressure sensor on each fan)
is necessary. At contrary, all models can work with percentage of maximum torque modulation.
The fans can work in 4 modes:
- CA mode (constant airflow) : airflow modulation.
- TQ mode (constant torque) : percentage of maximum torque modulation.
- LS mode (link to 0-10V signal): airflow or percentage of maximum torque modulation.
- CPs mode (constant pressure measured by external sensor): airflow or percentage of maximum
torque modulation.
For the description of the different working modes, please refer to the regulation manual of the HRmural series.
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
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/WIFI/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/HRmural: 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.
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