WRAP SERVICE VALVES
To help protect service valve seals during brazing, wrap water saturated cloths around service valve bodies and copper tube stubs. Use | ||
4 additional water saturated cloths underneath the valve body to protect the base paint. | ||
FLOW NITROGEN |
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WARNING |
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Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration |
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5 gauge set into the valve stem port connection on the liquid service | 1. FIRE, PERSONAL INJURY, OR PROPERTY |
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valve and out of the suction / vapor valve stem port. See steps 3A, 3B | DAMAGE will result if you do not wrap a water |
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and 3C on previous page and below for manifold gauge setup. | saturated cloth around both liquid and suction line |
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| service valve bodies and copper tube stub while |
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BRAZE LINE SET | brazing in the line set! The braze, when complete, |
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| must be quenched with water to absorb any residual |
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Water saturated cloths must remain water saturated throughout | heat. |
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6 the brazing and cool−down process. | 2. Do not open service valves until refrigerant lines and |
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A Braze liquid line to liquid line service valve. | indoor coil have been leak−tested and evacuated. |
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Refer to procedures provided in this supplement. |
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B Braze suction / vapor line to suction / vapor service |
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valve. |
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6B
SUCTION / VAPOR LINE
WATER SATURATED CLOTHS
IMPORTANT Allow braze joint to cool. Apply additional water saturated cloths to help cool brazed joints. Do not remove water saturated cloths until piping has cooled. Temperatures above 250ºF will damage valve seals.
6A
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME AWAY
FROM SERVICE VALVE.
SUCTION / VAPOR SERVICE PORT
MUST BE OPEN AND SERVICE PORT
CORE REMOVED TO ALLOW EXIT
POINT FOR NITROGEN FLOW
LIQUID LINE
WATER SATURATED
CLOTHS
7PREPARATION FOR NEXT STEP
After all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water saturated cloths to both services valves to cool piping. Once piping is cool, remove all water saturated cloths. Refer to the unit installation instructions for the next step in preparing the unit.
Figure 10. Brazing Procedures (Continued)
Page 15
XP17 SERIES
