950-0203-revK - 19 - March 1, 2016
SUCTION PORT CONNECTIONS
s
Connect the manifold set
to the uction port.
Figure 21a
SUCTION LINE CONNECTIONS
Use these ports for connection to
each of the linesets.
Each line set / evaporator assembly
must be prepared separately.
Loosen the liquid side flare fitting
slightly to allow nitrogen purge.
Nitrogen bottle connected for purge of the whole system.
Purge @ 150 PSI for 1-2 minutes.
Re-tighten flare fitting. Remove nitrogen tank
from manifold and replace with vacuum pump.
Vacuum to 500 microns for 30 minutes. Repeat
the above steps for each connected indoor unit.
Figure 21b
Once the vacuum operation has been performed on the system, open the valve slowly to allow the flow of
refrigerant. Once the refrigerant flow cannot be heard, open both valves completely. These valves must be
opened completely in order to prevent leaks. Replace caps on service ports and valves as added protection
against leaks.
