SV-407-KIT (01/12)
Page 8
8. Before brazing a joint with 15% silver content brazing alloy, connect a regulated nitrogen supply
(step 2) to the charging port inside the compressor unit and flow nitrogen through the earth loop
system and out the VAPOR service port until the oxygen in the braze joint area has been
replaced by nitrogen.
All service valve/line set joints are to be brazed with 15% silver content brazing alloy utilizing the
NITROGEN BRAZING PROCESS
.
9. Braze the joint. See Figure 7.
Figure 7. Nitrogen Brazing the Joint
10. After brazing the joints on the VAPOR service valve, repeat this process on the LIQUID service
valve joints after removing the service port cap.
11. After both VAPOR and LIQUID service valve joints have been brazed and cooled, re-install the
service valve and charging port cores and proceed to seal test the joints (Note: Do not exceed
150 PSIG on compressor unit), evacuate and charge the system according to the Installation
Manual (SHC-IOM).
