Leak Checking And Evacuation Process; Wiring - Wine Guardian SS025 Installation, Operation And Maintenance Manual

Leak Checking and Evacuation Process

ALL COMPONENTS CHARGED WITH DRY AIR MUST BE EVACULATED
 Purge the dry air charge from the unit by opening the liquid line shut-off valve or
removing the liquid line outlet fitting or plug, whichever is applicable for your particular
unit. Connect the suction and liquid lines to the unit.
 Pressurize and leak test the entire system including the condensing unit, evaporator and all
connecting tubing, fittings, and brazed joints using the intended operating refrigerant for
leak testing. A pressure equal to the low side test pressure marked on the unit nameplate is
recommended for leak testing. Repair any leaks found. Connect a good vacuum pump to
both the low and high side evacuation valves (if provided) with copper tube or high
vacuum tube (three-eighths inch inside diameter minimum) and draw a deep vacuum of at
least 15pp microns. Do not use the motor compressor to pull a vacuum and do not operate
the motor compressor in a vacuum. Break the vacuum with nitrogen.
 Evacuate the system to hold at 500 microns and break the vacuum with refrigerant.
Remove the vacuum pump. The system is now ready for charging. Charge the system with
the correct amount of refrigerant and mark the amount, with a ballpoint pen, in the space
provided on the unit nameplate.
NOTE: When charging through the suction service valve the refrigerant should be
charged in vapor form. NEVER CHARGE IN LIQUID FORM. Refrigerant should
always be charged through a dryer. Charging in liquid form may damage the valve
plate assembly as well as scrub the oil out of the compressor bearings
NON-AZEOTROPES MUST BE CHARGED IN THE LIQUID PHASE ONLY. TO AVOID COMPRESSOR
DAMAGE, LIQUID MUST ALWAYS BE CHARGED INTO THE HIGH SIDE OR INTO AN
NOTE: Be sure there is not an overcharge of refrigerant. An overcharge might
permit liquid refrigerant to enter the motor compressor and damage the valves,
rods, pistons, etc.

Wiring

 Wire the system as per the supplied wiring schematic found on pages 14 through 16 of
this manual.
 The fan coil unit is powered through a factory-supplied power cord, but you will need
to run 24 volt power wires from the two position terminal block to the field installed
enclosed contactor (in plastic housing) to be placed in the condensing unit, or to
somewhere adjacent that is easily accessible. This can be typical remote interface
controller wire or 18 gauge insulated wire. (see Fig.1 and 2 on the following page)
WARNING
BEFORE CHARGING WITH REFRIGERANT
WARNING
ACCUMULATOR.
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