Table of Contents
Advertisement
7 - CONNECTIONS
■ Exchangers with smooth braze-type INLET/OUTLET pipes.
- WARNING: Be careful not to damage the bellows when brazing
1/ Damp cloth
2/ Brazing time < 10 s.
7.3.1 - Fitting the control valves (optional)
Carry out installation in accordance with the plan supplied with the kit.
The pipes and valves must not under any circumstances place any additional load on the unit. The pipes must be supported on the
wall or floor of the building.
The valve actuators must have frost protection if they are likely to be subjected to temperatures below -10°C (motor environment).
For valves installed outdoors, provide an enclosure for the motors to protect them from the weather.
7.3.2 - Bleeding, draining, filling
In accordance with industry practice, provide a bleed hole at the high point and a draining and filling hole at the low point for each
hydraulic circuit.
It is recommended to use a filling device with a check valve.
To comply with anti-pollution standard NF EN1717 or the regulations in force at the installation location. The device must under no
circumstances be connected to the municipal water supply unless the additives used in the hydraulic circuit have been approved by
the ministry of health (e.g. monopropylene glycol (MPG) products with NEUTRAGEL SANIT or HELIOGEL CS 80 approval).
7.4 - Electric heater
Risk of fire and unit damage if the air flow is absent or too low:
REQUIRED MINIMUM AIR SPEED: 0.8 m/s
- Use an air flow control device set in accordance with the dissipated heating power,
- The operation of the heating coil must be fan-controlled.
- A fan delay of at least 15 minutes must be applied after the electric heater has been switched off,
- In variable flow operation, power staging is recommended for the electrical heaters (multi-stage or TRIAC) and they should operate
proportionally to the air flow rate.
7.4.1 - Connection:
Always follow the general safety instructions.
■ For machines supplied without a control unit:
- When selecting the cables, take into account the routing, the ambient operating temperature and the current of the connected
heaters.
- The selection, securing and mechanical and electrical protection of cables must conform to the regulations and laws at the
installation site.
- The power electrical connections are made directly on the heaters. Observe the tightening torque of 4 Nm.
- The safety components must be connected.
- The installed safety thermostats must cut the power supply to the heating elements.
- The safety components must be electrically connected directly to the terminals of the thermostats with manual and automatic
reset located on top of the heater. Before making the connection, cut the power supply control for the electrical heaters.
- Coloured labels indicate the stage marking, their output per unit and the phase order.
35
Advertisement
Table of Contents
