Alfa Laval AlfaNova 14-76, AXP AN, Инструкция по эксплуатации

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Installation
For refrigeration applications – Figure A shows the installation
of an evaporator, which the connections may be either on the
front or on the rear. Figure B shows a condenser.
• Use an anti-freeze thermostat and
fl ow monitor to ensure a
constant water fl ow before, during, and at least two minutes
after the compressor has been running.
• Avoid “pump-down”, i.e. emptying the evaporator by
running the compressor after shut-down until a preset
refrigerant pressure is reached. The temperature could then
drop below the brine freezing point, which could damage
the evaporator.
• Use a fl ow switch and a low-pressure switch.
• Make sure only media from the heat exchanger can pass
the fl ow switch. The low-pressure switch should assure a
minimum pressure drop of 5 - 10 kPa (0.73 - 1.45 PSI).
Heat exchanger with a refrigerant distribution system should
be mounted with the distributor at the bottom.
Typical installation of single circuit:
S4 S1
S3 S2
S4 S1
S3 S2
A B
3
4
2
1
4
3
1
2
Figure 5. Single circuit: A evaporator; B condensor.
1.Refrigerant inlet 2.Refrigerant outlet
3.Water/Brine inlet 4.Water/Brine outlet
For an evaporator, the pipe should be straight (at least 150 mm
/ 5.9 inch length) between the expansion valve and refrigerant
inlet. Avoid using pipe elbows between the expansion valve
and the refrigerant inlet.
Leak test
Perform leakage test before placing the plate heat exchanger
in operation.
Document ID Language Edition
18
Instruction Manual -
Fusion-bonded plate heat exchangers
34566980-01 EN 2018-01