Hillphoenix Adaptapak ADP-M0000-L0032, Installation And Operation Manual

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AdaptaPAK® Installation
b. Line lengths that are subject to expansion and contraction—suction, liquid and remote condenser lines are
subject to expansion and contraction and must be sized accordingly—depending on design considerations
(typically long runs or hot gas), an expansion loop may need to be installed (may be indicated on the plan,
but not always).
4. Provide proper support and clamping to refrigeration lines—line breakage must be avoided on all lines,
particularly on long, straight runs of suction lines where expansion loops must be used with types of hangers
that allow for longitudinal movement of piping and, as a result of closer placement, reduce sagging and
vibration, discourage oil from collecting in fixture coils and piping through consistent sloping, and maintain
proper lubrication in the compressors; all piping must be adequately supported with hangers that can
withstand the combined weight of tubing, insulation, valves, and refrigerant in the tubing.
5. Properly brazed joints—all joints must be brazed according to the customer’s specification after being
thoroughly cleaned. Dry nitrogen at 1/2 psi must be flowing through the tubing while joints are brazed to avoid
internal scale buildup. Limit the soldering paste or flux to the minimum required to prevent contamination of the
solder joint internally. Flux only the male portion of the connection, never the female. After brazing, excess flux
should be removed
6. Insulate suction lines—use only material listed in the customer specification. Insulation must be thick enough
to keep heat from getting in, and moisture (sweating) getting out. Maintaining proper return gas temperatures
cools compressor windings and prevents water damage and mold growth by keeping suction lines from
sweating. When using subcooled liquid, the liquid line may also need to be insulated.
7. Pressure test line sets—use dry nitrogen to test for leaks in brazed joints to confirm they are able to hold
pressure. Always take care to not over-pressurize any components.
8. Properly evacuate system—use a vacuum pump capable of 50 microns. Acceptable industry practice calls for a
triple evacuation. A system that does not hold a vacuum has a leak. Never use a compressor.
Other Considerations
Several other important considerations should always be kept in mind about piping for any refrigeration system
installation. For instance, all refrigeration piping must be sized in accordance with the capacity, and or size,
recommended by the case, coil, and condensing unit manufacturers or engineering tables.
Tubing Material
Another important consideration is that all refrigeration tubing (unless otherwise noted, such as when soft drawn
piping is specified for leading into coils) should be either type K or L hard drawn, cleaned and factory-sealed.
Tube Cutting
Any cutting of tubing should be done using a wheel type cutter, whenever possible. In order to keep out dirt and
moisture, tubing should never be left open.