Emerson Copeland Scroll YHV 2P Series User Manual

32 AGL_HP_VS_YHV2P_E_Rev0
A minimum suction pressure, specified by the published operating envelope, must be maintained
during charging. Allowing the suction pressure to drop below that value may overheat the scrolls and
cause early drive bearing and moving parts damage. Never install a system in the field and leave it
unattended when it has no charge, a holding charge, or with the service valves closed without
securely electrically locking out the system. This will prevent unauthorised personnel from
accidentally operating the system and potentially ruining the compressor by operating with no
refrigerant flow. Do not start the compressor while the system is in a deep vacuum. Internal
arcing may occur when a scroll compressor is started in a vacuum causing burnout of the internal
lead connections.
6.6.3 Compressor return procedure
If a compressor has to be returned to the manufacturer for analysis the procedure below shall be
followed:
▪ During the entire working procedure continuously check if the ambient atmosphere is flammable.
If flammable atmosphere is detected ensure proper ventilation of the working space and
immediately cut-off the power supply.
▪ Resume working after the atmosphere is no longer dangerous.
▪ Recover the refrigerant from the system using a suitable recovery unit. During this action, the
compressor crankcase heater could be energized – immediately de-energize in case a flammable
atmosphere is detected.
▪ Recover to minimum 0.3 bar absolute or lower. For best result to recover most of the refrigerant,
which is also solved in the oil, run a second and third times the recovery unit as it may be
necessary
▪ Flush the whole system with oxygen free dry nitrogen (OFDN).
▪ Open the system with a cutting tool and flush the entire system with OFDN.
▪ Disassemble the compressor with a cutting tool. Drain and recover compressor oil properly. Flush
the compressor with OFDN for a few minutes.
▪ The compressor should be returned free of oil and with connections open - do not close
connections with plugs.
▪ Properly collect and secure the oil. Provide information about the quantity of oil drained from the
compressor and its colour. Ideally, send a good picture.
▪ Dispose of the oil according to local rules and regulations.
▪ Use a proper cardboard box package when preparing the compressor for shipment. Place
warning icons on each side and on the top of the box. Mention the following message on
the box: "Warning! Flammable refrigerant compressor for analysis".
▪ The compressor package must be kept in the upright position – mark it accordingly.
▪ If more than one compressor has to be returned, each compressor has to be packed individually.
NOTE: Check with your transport company that all the requirements applying to such
shipment are complied with.
6.7 Lubrication and oil removal
WARNING
Air/A2L mixture! Flammable and explosive atmosphere! Fire and
explosion hazard!
Use suitable recovery unit and recycling bottles also for oil disposal as A2L
refrigerant may still be solved in the oil.
CAUTION
Chemical reaction! Compressor destruction! Do not mix up ester oils with
mineral oil and/or alkyl benzene.
The compressor is supplied with an initial oil charge. The standard oil charge for use with refrigerant
R452B and R454B is a polylester (POE) lubricant Emkarate RL 32 3MAF. See nameplate for original
oil charge shown in litres. A field recharge is from 0.05 to 0.1 litre less.
One disadvantage of POE is that it is far more hygroscopic than mineral oil (see Figure 25). Only
brief exposure to ambient air is needed for POE to absorb sufficient moisture to make it unacceptable

Emerson Copeland Scroll YHV 2P Series Specifications

General

Brand	Emerson
Model	Copeland Scroll YHV 2P Series
Category	Air Compressor
Language	English