Airtight Test Procedure - Panasonic OCU-CR200VF5 Service Manual

Airtight Test Procedure

(Execute this test after competing piping work and airtight test but before starting
heat insulation work)
Make sure to close the vacuum valve of CO
Caution
Consider special local regulations and consider Installation of all
equipment have to be in accordance to pressure directive 2014/68/EU
and European norm EN378.
1. Piping connection
1) Connect the joint valve of the service piping (SPK-TU125) and the manifold gauge set
exclusively for CO
2) Connect a nitrogen cylinder and the manifold gauge set by using a CO
1/4" pipe.
Low pressure service valve
Joint valve
2. Airtight test
1) Set the evacuation mode in accordance with " Evacuation Mode".
2) When carrying out an airtight test of interconnecting piping and load-side equipment
(such as showcase and unit cooler), set up the service valves with the front seat.
After replacing components of the refrigeration unit and when performing an airtight test of
the refrigeration unit, use the Mid-position. (The access ports are open.)
However, at this time, avoid applying the high-pressure side airtight test pressure to
the low-pressure side.
Note: Airtight test of the refrigeration unit was completed at the time of factory
shipment. Pressure testing should only be carried out by personal / companies
who have necessary certification. Consider carefully local regulations and
EN378.
Design pressure in Factory
High pressure part
refrigerant by using a CO
2
High pressure service valve
Service piping
CO
2
Low side
gauge
12MPa
charge hose or 1/4" pipe.
2
manifold gauge set
High side
gauge
Charging
valve
CO
Low and intermediate
pressure parts
8MPa
9
manifold gauge set.
2
charge hose or
2
Nitrogen cylinder
charge hose or 1/4" pipe
2