111
Step C: Drawing Vacuum and Opening the Refrigerant Paths
Use the Schrader ports shown in Fig. 32C and 33C to connect a
vacuum pump and pull down the pressure on these isolated sec-
tions to at least 50 microns. Open the ball valves at this point, one
at a time.
Step D: Connect Fan Wiring
The fan wiring for the 501A and 501B sections must be connected
in the field. Connect 501A and 501B junction boxes (shown in
Fig. 34) using the conduit jumper shipped inside Circuit B power
box.
SCHRADER PORTS FOR
DRAWING VACUUM
NOTE: APPLY WET RAG TO BALL VALVES
PRIOR TO BRAZING
Fig. 33C — 30XA501 Liquid Line Piping Installed (In Field)
A30-5642
NOTE: Corner posts removed for clarity.
Fig. 34 — 30XA501 Fan Junction Boxes to be Connected with Conduit Jumper
A30-5643
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