FloAire Direct Expansion Coil Modules - Manual (Page 8)

8
VI. If there are multiple joints to be made, move the torch and begin heating the next
joint. This will save time and fuel.
VII. Let the joints cool naturally. Cooling the joints with water could cause the joints
to fail prematurely.
2. Pressure testing the lines.
A. Charge the lines with Dry Nitrogen to design operating PSI.
B. If
the pressure changes
drastically, you have a leak. If
the pressure drops slowly, you
may have a leak. If the
pressure holds for 15 minutes,
proceed to the next step.
I. Ultrasonically leak
check all joints.
II. After all joints have
been tested, bleed off
the excess pressure,
and repair the joints.
You will have trouble
repairing the joints if
there is pressure in the
lines.
III. Start the pressure
testing over.
C O M P RES SO R
G AUG E
SUC TIO N LINE
M IC R O M ETER
V AC UUM PU M P
LEA K TEST AND PREP
FO R REFRIGERA NT C HA RG E
T o V acuum Pum p (Yellow)