Loading The System - Zanotti Zero Series Installation Manual

3.15 Loading the system

Connect the refrigerant bottle to the gauge manifold and place it on a scale.
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Connect the refrigerant bottle valve and drain the pressure gauge fitting line.
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Keep the low-pressure side valve of the gauge manifold closed. Open the high-pressure side
•
valve.
• Add refrigerant (see the quantity on silver sticker).
• R-452A or R-134a. The refrigerant charge must be made in liquid phase for R-452A.
Close the refrigerant bottle valve and the upper side valve of the gauge manifold.
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Start the vehicle engine, run at approximately 1000 rpm, and turn the unit on.
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Open the lower side valve of the gauge manifold and the collant bottle valve, and add refrigerant
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slowly until no bubbles can be seen through the liquid level glass window.
• Close the refrigerant bottle and gauge manifold valves.
• Leave the unit running for 15 minutes.
Set the suction pressure regulating valve CPR (see 3.16).
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Adjust the expansion valve (see 3.17).
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Connect the unit to electrical standby source. Run the unit on electric standby mode for 15 minutes.
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• Start the vehicle, turn on the unit and allow it to run on vehicle on for 15 minutes.
• Check the liquid level window for bubbles.
Turn off the unit, stop the vehicle and remove the gauge manifold.
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NOTE
The above conditions MUST be confirmed each time the refrigerant level is checked or
if refrigerant needs to be added for any reason.
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INSTALLATION MANUAL
Refrigeration unit
Series Zero Direct-Drive
Z200 | Z250 | Z350 | Z380
Z380 Multi
rev.01