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Platinum Split
Brazing Procedure
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Connect the bottle probe to the Evaporator Unit (Fan Coil Unit).
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Fill a wine bottle 75% 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.
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Energize the Evaporator Unit (Fan Coil Unit) and set the keypad to call for cooling.
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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.
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Remove the valve depressors from the gauge hoses on a four-valve manifold.
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Connect the manifold to the low-pressure service valve port on the Condensing Unit and a nitrogen tank.
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Open the suction line service valve and purge the system with nitrogen.
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Braze all connections and cool off quickly.
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Cap the access valve on the suction line.
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Connect the high-pressure hose from the manifold to the liquid line service valve port.
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Pressure test the system at 150 psi for 20 minutes.
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Check all braze joints with leak detector or soap bubbles.
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Release the nitrogen once it is confirmed that there are no leaks.
Evacuation
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Remove the nitrogen tank from the manifold and attach the manifold to the refrigerant tank.
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Install a micron gauge on the access valve near the Evaporator Unit (Fan Coil Unit).
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Mid-seat both service valves.
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Install service caps on the valves.
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Energize the liquid line solenoid valve.
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After confirming that there is fresh oil in the vacuum pump, connect the 3/8” hose from the manifold to the pump.
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Start the pump and run it until the micron gauge on the Evaporator Unit (Fan Coil Unit) reads 200 microns or less.
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Disconnect the vacuum pump from the system.
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Break the vacuum by pressurizing the system to approximately 5 PSI with R-134a refrigerant.
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Remove the micron gauge from the access valve.
Charging
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Install a low-pressure gauge on the access valve near the Evaporator Unit (Fan Coil Unit).
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With the power off to the Condensing Unit, admit liquid refrigerant through the liquid line service valve until the refrigerant
stops flowing.
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Turn on the circuit breaker for the Condensing Unit. The compressor should turn on if the pressure in the suction line is above
20 psi.
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Add refrigerant (in vapor form) to the low side of the system.
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Observe the sight glass. If bubbles are present, add more refrigerant (in vapor form) to the low side.
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Once the sight glass is clear, check the superheat at the outlet of the Evaporator Unit (Fan Coil Unit). Adjust the TXV until the
superheat is between 8-12°F degrees.
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Under normal operation, with the wine cellar at 55°F and the ambient temperature at 85°F, the low side pressure should be
between 28-32 PSI and the high side should be between 170-180 PSI.
Finalizing the Installation
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Confirm that the entire suction line from the TXV to the suction line service valve is insulated using cellular insulation or
equivalent. Seal all seams with Armaflex 520 Foam Insulation Adhesive or equivalent.
•
Confirm that the control is displaying the correct temperature and that no alarms are present. Refer to page 36 for corrective
action if alarms are present.
Charging Information
A.
Energize the solenoid valve on the Evaporator Unit by plugging the unit in and adjusting the thermostat to call for cooling.
INSTALLING THE CONDENSING UNIT (continued)
