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BluCube Installation and Maintenance Manual 7222094 V1.12.0_04_2016
Refrigeration Information
Pipework Installation
General
Special consideration should be given to vertical pipe runs and heat pump installation.
When insulating refrigerant lines, cut approximately 30 – 50mm longer than the distance between the units to ensure the
insulation goes right up to the unit. Leave connections uncovered for leak testing.
Remove burrs to the ends of the copper tube, holding the tube downward to avoid allowing dirt to contaminate the tube.
The installation of a sight glass close to the indoor unit is recommended.
Pressure Testing
When installation is complete, the system should be pressure tested.
Fill the system with dry nitrogen to a pressure of between 45 bar/250 psig and 45 bar/ 500 psig.
NOTE: The LP switch must be disconnected for pressures above 17 bar/250 psig.
Record the pressure over a minimum of 60 minutes to detect major leaks (a 24 hour period should preferably be
allowed).
If a reduction in pressure is detected, trace the leak and repair before conducting a further pressure test and charging.
Evacuation
Evacuation for systems operating with R410A refrigerant to be carried out as follows:
1. Use a high vacuum pump and connect to the high and low pressure sides of the system via a gauge manifold fitted
with compound gauges. A high vacuum gauge should be fitted to the system at the furthest point from the vacuum
pump.
2. Triple evacuation should be used to ensure that all contaminants are removed.
3. Operate the vacuum pump until a pressure of 1.5 torr (200 Pa) absolute pressure is reached, then stop the vacuum
pump. To break the vacuum using Nitrogen (Oxygen free) until the pressure rises above zero.
4. The above operation should be repeated a second time.
5. The system should then be evacuated a third time but this time to 0.5 torr absolute pressure.
6. Break with the correct refrigerant, until pressures equalise between the charging bottle and the system.
IMPORTANT
Ensure all valves within the system are open during pressure testing/evacuation.
BluCube™
Condensing Unit
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Summary of Contents for BluCube CUR092V16-1CO-0
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