Unical ENERPUMP DHW 72, Installation And Service Manual

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Luxury Air Source Heat Pump-Monobloc System 32
Setting the pre-pressure of the expansion vessel
When it is required to change the default pre-pressure of the expansion vessel (1 bar), keep in mind the
following guidelines:
- Use only dry nitrogen to set the expansion vessel pre-pressure.
- Inappropriate setting of the expansion vessel pre-pressure will lead to possible malfunctioning
of the system. Therefore, the pre-pressure should only be adjusted by a licensed installer.
Connecting the water circuit
Water connections must be made in accordance with the outlook diagram delivered with the unit,
respecting the water in- and outlet
BE CAREFUL NOT TO DEFORM THE UNIT PIPING BY USING EXCESSIVE FORCE WHEN CONNECTING
THE PIPING. DEFORMATION OF THE PIPING CAN CAUSE THE UNIT TO MALFUNCTION.
If air, moisture or dust gets in the water circuit, problems may occur.
Therefore, always take into account the following when connecting the water circuit:
•
Use clean pipes only.
•
Hold the pipe end downwards when removing burrs.
•
Cover the pipe end when inserting it through a wall so that no dust and dirt can enter.
•
Use a good thread sealant for the sealing of the connections.
•
The sealing must be able to withstand the pressures and temperatures of the system.
•
When using non-brass metallic piping, make sure to insulate both materials from each other to
prevent galvanic corrosion.
•
Because brass is a soft material, use appropriate tooling for connecting the water circuit.
Inappropriate tooling will cause damage to the pipes.