Manitowoc 820C Serie Manual De Instalación, Operación Y Mantenimiento página 22

Installation
Step 4 Pressure Test and Evacuate Line Set and ICVD
Condensing Unit.
• Shutoff valves for the line set must remain closed until
pressure testing and evacuation are complete.
• Valve core removal tools that allow for removal and
installation of the valve cores without removing hoses for
the manifold gauge set are recommended to decrease
the evacuation time.
• Pressure test at 1000 kPa (150 psi) for a minimum of 15
minutes.
• Minimum evacuation level is 500 microns.
Pressure test the line sets and ICVD Condensing Unit with
1000 kPa (150 psi) of dry nitrogen. Add nitrogen at the
shutoff valves for the line set located at the back of the ice
machine head section or from the access valves located
in the ICVD Condensing Unit. Complete the pressure test,
verify no leaks are present and remove the nitrogen from the
system before connecting the vacuum pump.
ALTERNATE CONNECTIONS AT CONDENSING
UNIT SCHRADER VALVES
22
A retention valve is present in the compressor discharge line.
The retention valve requires evacuation connections at four
points.
Ice Machine Head Section
1. Low side shut off valve on the back of the ice machine
2. High side shut off valve on the back of the ice machine
ICVD Condensing Unit
3. Compressor Discharge Access Valve
4. Suction Filter Access Valve
Connection of a manifold gauge set (or a hose with core
depressors on both ends) between the suction-filter access
port and the compressor access valve (located between the
compressor and discharge line retention valve) is required.
CONNECT MANIFOLD GAUGE SET OR HOSE
WITH CORE DEPRESSORS ON BOTH ENDS
RETENTION VALVE
Part Number: 000013325 Rev 02 6/17
LINESET
CONNECTION
LOCATION
CONNECT VACUUM PUMP TO SHUTOFF
VALVES FOR THE LINE SET
Section 2