Wiring Diagram; Pressure Relief Valve - Rivacold MH Mode D'emploi Et D'entretien

These condensing units can be used in various type of installations:
• For cold rooms
• For refrigerating counters
• For water chillers, etc.
Each condensing unit can be connected to one or more evaporators, of course, always following
refrigeration rules. In any case, it is necessary to choose every single component with care. The
following section contains examples of refrigerating drawings which complete the refrigerating
diagrams shown above.
• Drawing 8 (refrigerating diagram of the evaporating side)
7.

WIRING DIAGRAM

The wiring diagram relevant to the part wired by the manufacturer has been placed inside the
machine.
Please Note:
The liquid injection solenoid valve (where provided) must open when the compressor is working
and it closes in the following conditions:
•
When the compressor stops
•
During defrost (hot gas)
8. PRESSURE RELIEF VALVE (where provided)
8. 1 Instructions and limits of use
Replacement of the pressure relief valve is suggested whenever, during discharge, the build-up of
component processing and of pipe residues happens to make the shutting of the seal defective.
Before you replace the valve, make sure that the system is not under pressure or at high-level
temperature in the area you are operating.
8. 2 Maintenance/inspection and valve setting
Warning ! Maintenance is not provided for pressure relief valves. The removal of the cap or
tampering with the seal are considered unauthorized modifications of the setting. This will void the
manufacturer's guarantee.
The inspection of the pressure relief valves is reserved to specific Bodies in charge and is regulated
by the current laws of the country of installation.
8. 3 Expected lifetime
The pressure relief valve should be checked every 5 years.
Drawing 8
Key to symbols:
EV = Evaporator
VT = Thermostatic valve
S = Siphon
MH TH Pag. 21 REV. 08 11/07
UK