Vertiv | Liebert CRV CCD10 Condenser | User Manual
18
Mechanical Installation
2.4.2
Installing Pipelines
WARNING! Risk of over-pressurization of the refrigeration system. Can cause serious injury or death. Can
cause explosive discharge of high-pressure refrigerant, loss of refrigerant, environmental pollution, or building
and equipment damage. This unit contains fluids and gases under high pressure. Use extreme caution when
charging the refrigerant system. Do not pressurize the system higher than the design pressure marked on the
unit's nameplate.
For systems requiring EU CE compliance (50 Hz), the system installer must provide and install a pressure relief
valve in the high side refrigeran
t circuit that is rated same as the refrigerant high side “Max Allowable
Pressure” rating that is marked on the unit serial tag. Do not install a s
hutoff valve between the compressor
and the field installed relief valve. The pressure relief valve must be CE-certified to the EU Pressure Equipment
Directive by an EU “Notified Body.”
CAUTION: Risk of excessive refrigerant line pressure. Can cause equipment damage or injury resulting from
tubing and component rupture. Do not close off the refrigerant-line isolation valve for repairs unless a
pressure-relief valve is field- installed in the line between the isolation valve and the check valve. The
pressure-relief valve must be rated 5% to 10% higher than the system-design pressure. An increase in ambient
temperature can cause the pressure of the isolated refrigerant to rise and exceed the system-design pressure
rating (marked on the unit nameplate).
NOTES:
•
The copper pipes should be heat preserved. When the copper pipes pass through the wall or other obstacles,
take isolation measure such as using the shock pad to avoid direct contact with the wall. Prevent the dust, water
vapor and solid particles from entering the copper pipes.
• All the joints of
the refrigerating pipes must be silver-brazed.
•
Use a flow of dry nitrogen through the piping during brazing to prevent formation of copper oxide scale inside
the piping. When copper is heated in the presence of air, copper oxide forms. PVE oils will dissolve these oxides
from inside the copper pipes and deposit them throughout the system, clogging filter driers and affecting other
system components.
1.
Identifying the pipe sizes
Refer to Installing Unit Pipes in Liebert CRV, CRD10 Air Conditioner User Manual for pipe sizes.
2.
Identifying the condenser installation height
Refer to Installing Unit Pipes in Liebert CRV, CRD10 Air Conditioner User Manual for the installation height.
3.
Installing pipes
Install the pipes according to the factual conditions and industry standard.
