Vintage Cellars Ceiling Mount - Manual (Page 43)

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Refrigerant Piping Overview
• Using the charts and illustrations found on previous pages, route the line set between the evaporator unit and
condensing unit. Be sure to reference the chart for correct line set sizing. All horizontal suction piping should be
pitched toward the condensing unit ½” for every 10’ of pipe. When installing and routing the line set, cap both
ends of each tube to prevent debris from entering the tubing.
• Prior to connecting the piping to the evaporator and condensing units, loosely connect a refrigerant manifold to
the suction and liquid line service valves.
• Purge the hoses with dry nitrogen and tighten the hose connections.
• Remove the service valve caps and turn the valve stem clockwise ½ turn to unseat the valve and open the
service port. Keep the piping ports sealed until ready to braze.
• Purge dry nitrogen through the fittings at a slow rate to prevent formation of highly abrasive copper oxide.
• Perform all brazes.
• Pressure test the system and check for leaks.
• Insulate the suction line using ½” wall cellular insulation or equivalent. Seal all seams with Armaflex 520 Foam
Insulation Adhesive or equivalent. Wrap each seam using line set tape.
Liquid Line Piping Procedure
• ¼” OD copper tubing is required for the liquid line on all systems.
• Braze a short piece of ¼” copper tubing to the liquid line service valve.
• Connect the supplied refrigerant drier to the tubing.
• Downstream from the drier, connect the moisture indicating sight glass in an easily visible location.
• Run the tubing to the evaporator unit (fan coil unit) and attach to the liquid line connection on the evaporator
unit (fan coil unit).
Suction Piping Procedure
• Install an access valve at the outlet of the evaporator unit (fan coil unit).
• Connect an appropriately sized suction line to the suction line service valve on the condensing unit.
• Run the pre-insulated suction line to the evaporator unit (fan coil unit) and attach to the suction line connection
on the evaporator unit (fan coil unit).
Brazing Procedure
• Connect the bottle probe to the evaporator unit (fan coil unit).
• Fill a wine bottle ¾ full of room temperature water. Insert the bottle probe into the neck of the bottle as far as
possible. It is important that the bottle probe stopper be compressed by the neck of the bottle to ensure water will
not leak.
• Energize the evaporator unit (fan coil unit) and set the controller to call for cooling.
• Verify that the set point on the control is set low enough to allow the unit to run for the entire length of the
brazing, evacuation, and charging procedure.
• Remove the valve depressors from the gauge hoses on a four-valve manifold.
• Connect the manifold to the low-pressure service valve port on the condensing unit and a nitrogen tank.
• Open the suction line service valve and purge nitrogen through the system.
• Braze all connections and cool off quickly.
• Cap the access valve on the suction line.
• Connect the high-pressure hose from the manifold to the liquid line service valve port.
• Pressure test the system at 150 psi for 20 minutes.
• Check all braze joints with leak detector or soap bubbles.
• Release the nitrogen once it is confirmed that there are no leaks.
INSTALLING THE CONDENSING UNIT