7.0 Essential Service/Installation Tools, Equipment and
Materials
Before attempting the Start-Up process , the technician needs to assemble the correct tools and
equipment for the task. Apart from the normal refrigeration service technician tools, electrical test
equipment and hand tools, the following items are essential for the installation of hermetic
refrigeration systems :
Vacuum Pump of sufficient size for the total refrigeration system and capable of
pulling a vacuum of at least 100 microns. This pump should be fitted with a proper
vacuum breaker valve in event of this pump loses power supply during the evacuation
process
A Four Port Charging Manifold including;(1) A 3/8” hose to vacuum pump, (2) All
hoses fitted with removable schraeder depressors, (3) One compound and one
pressure gauge. All of this equipment to be leak free, accurate and reliable. (See Fig
14 below)
Fig 14 . Four Port Charging Manifold
Clean and new (not recycled) R22 Refrigerant of sufficient quantity for the refrigerant
operating
change plus leak testing. Note: Refrigerant cylinders must be of the type that
can deliver liquid refrigerant until empty.
Oxygen-free Nitrogen and regulators.
Reliable Electronic Vacuum Gauge. A clean and leak free refrigeration system can
only be assured if the initial vacuum is deep and holds on test. This equipment must
read to the standards indicated in the recommended start-up procedures (Section 10.)
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