HCM-IMM (10/16) 9
A top view of typical Hybrid Cooling Module and line set vapor line connections are illustrated in
Figure 4. For new installations of an EarthLinked system with an HCM, an alternate method to
the one shown in Figure 4 is to run a single piece vapor line from the compressor unit to the
HCM and another single piece vapor line from the HCM to the vapor manifold of the earth loop
system.
Figure 4. Top View of Line Set Connections
All refrigerant piping joints and connections in the EarthLinked® heating and cooling system,
including the Hybrid Cooling Module, line sets and earth loop system are to be brazed with 15%
silver content brazing alloy, utilizing the
NITROGEN BRAZING PROCESS.
CAUTION!
NITROGEN BRAZING PROCESS
PURPOSE
: Utilize the NITROGEN BRAZING PROCESS on all brazed
refrigerant piping connections. This process eliminates oxidation products
from inside joint surfaces.
TECHNIQUE
:
“Trickle” nitrogen gas at 1-2 psi pressure through the joint
area being brazed to displace the oxygen. When oxygen has been
displaced, TURN THE NITROGEN OFF.
CONSEQUENCES:
Failure to displace oxygen with nitrogen at the brazed
joint will result in particulate matter being released into system. The result
is discoloration of refrigerant oil, contamination of the system and possible
system failure.
