CAUTION |
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| WARNING |
Brazing alloys and flux contain materials which are |
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| Danger of fire. Bleeding the refrigerant | ||
hazardous to your health. |
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Avoid breathing vapors or fumes from | brazing |
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| charge from only the high side may result |
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| in pressurization of the low side shell and | ||
operations. Perform operations only in well−ventilated |
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| suction tubing. Application of a brazing | ||
areas. |
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| torch to a pressurized system may result | |
Wear gloves and protective goggles or face shield to |
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| in ignition of the refrigerant and oil | ||
protect against burns. |
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| mixture. Check the high and low | |
Wash hands with soap and water after handling brazing |
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| pressures before applying heat. | ||
alloys and flux. |
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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 under the valve body to protect the base paint. |
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FLOW NITROGEN | WARNING | |
Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration | FIRE, PERSONAL INJURY, OR PROPERTY DAMAGE | |
5 gauge set into the valve stem port connection on the liquid service | ||
may result if you do not wrap a water−saturated cloth around | ||
valve and out of the suction / vapor valve stem port. See steps 3A, 3B | both liquid and suction line service valve bodies and copper | |
and 3C on previous page and below for manifold gauge setup. | ||
tube stub while brazing the line set! The braze, when | ||
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BRAZE LINE SET | complete, must be quenched with water to absorb any | |
residual heat. | ||
Cloths must remain water−saturated throughout the brazing and | Do not open service valves until refrigerant lines and | |
6cool−down process. | indoor coil have been leak−tested and evacuated. Refer | |
1. Braze liquid line to liquid line service valve. | to Installation and Service Procedures manual found on | |
DAVENET. | ||
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2.Braze suction / vapor line to suction / vapor service valve.
6B
SUCTION / VAPOR LINE
WATER−SATURATED CLOTHS
IMPORTANT ! |
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Allow braze joint to cool. Apply additional |
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water−saturated cloths to help cool brazed |
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joints. Do not remove water−saturated cloths |
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until piping has cooled. Temperatures above | 6A |
250ºF will damage valve seals. |
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
SUCTION / VAPOR SERVICE
PORT MUST BE OPEN AND
SERVICE PORT CORE RE-
MOVED 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.
FIGURE 8
Page 7
XC21 SERIES
