Emicon RAH - Connection to the Hydraulic Circuit

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___________________________________RAH / PAH Ka_________________________________
Follow the here below listed general instruction in order to realize the cooling circuit:
- The piping path must be done so to limit as much as possible the pressure drops in the system.
- The pipes must be suitably supported by brackets and laid so to allow an easy inspection and maintenance.
- The material used to realize the system must have a nominal pressure not lower than PN6.
- During piping installation, all required measures to avoid dirt and solid particles enter the tubes must be taken.
- The water circulation pump must be able to give the appropriate water ow capacity with required available pressure to overcome the system pressure
drops in any predictable working condition.
- The hydraulic circuit must work with a pressure between 1,5 and 6 bar. To this purpose one or more diaphragm expansion vessels are required, with
suitable volume and pre-charge pressure.
If the hydraulic circuit is designed to work with pressures lower than 1,5 bar (open systems for example) or higher than 6 bar, you need to inform the Manufacturer
to agree the measures to apply:
• The system must be protected by a suitably sized safety valve with a calibration pressure not higher than 6 bar.
• Along the circuit and especially in the upper points, air vent valves must be installed.
• The system must have, in the most suitable position, drainage connections.
• The system must have connections for lling it with water and, if required, for adding antifreeze substances.
• Once the circuit is nished, it must be washed with suitable substances, in order to avoid that dirt and foreign particles can remain inside it causing miss
functioning and damages during operation.
• To connect the unit to the water distribution network, use the prearranged sections shown in the attached dimensional drawing.
During leak detection, the system must be subjected to a pressure not higher than 6 bar
3.5.2 CONNECTION TO THE HYDRAULIC SYSTEM
The connection of the unit to the hydraulic circuit must be done by qualied personnel, in compliance with the current local regulations.
The connection of the unit to the system must be done so that the uid to be cooled circulates inside the evaporator in the right direction.
To this purpose, pipes must be connected respecting the indication near the pre-arranged connections of the unit.
For connecting the pipes to the evaporator, it is advisable to follow the instructions here below listed:
• Connect the pipes as shown in the following diagram
(at customer’s charge)
• Install anti-vibration pipe ttings to avoid any vibration transmission and allow the thermal expansion.
• To avoid the entry of foreign bodies and dirt, install on the unit water inlet a cleanable mechanical lter with grid not larger than 2 mm and with suitable
nominal diameter to reduce pressure drops;
• It is advisable to install shut off valves up and downstream the lter, to make the required cleaning operations easier and faster.
• The installation of probes and gauges near the unit in-and-outlet connections, makes the check of the right unit operation easier;
• The chilled water system must be covered by close cells anti condensation material, thermally insulated, steam resistant and with a thickness suitable to
the worst foreseeable conditions, during working and stops.
• To connect the unit to the hydraulic system, the prearranged connections shown in the dimensional drawing enclosed in the Handbook, must be used.
• Once the circuit is done and the unit installed, an hydraulic leak test of the all system must be done, in order to nd any possible leakage and repair it,
before the unit is lled and commissioned.