Danfoss Optyma Plus, Инструкции по применению

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System design recommendations
During all of the charge procedure keep the
oil heaters ON and keep an eye on the oil sight
glass, so that it doesn’t change color, density
or appearance and it doesn’t start foaming.
Refrigerant charge quantity must be suitable for
maximum load conditions as well as for minimum
load conditions for both summer and winter
operations.
It means that refrigerant charge should be enough
to feed all evaporators during the peak load
conditions and condenser should not be flooded
by liquid refrigerant during minimum load
conditions.
Receiver and liquid lines should be able to contain
remaining refrigerant during low load conditions.
Only refrigerant for which the unit is designed for
has to be charged, see unit data.
In case of refrigerant blend charging has to be
done in liquid form in order to avoid chemical
changes of the refrigerant.
NOTICE
Don’t judge the refrigerant charge by
the liquid sight glass as 100% correct way. It may
mislead you!
CAUTION
When Optyma
™
Plus INVERTER unit
has to be scraped, refrigerant has to be disposed
for destruction. Local laws and rules have to be
followed for disposal of refrigerant.
5.4 Oil level
5.5 Check before start
Optyma
™
Plus INVERTER condensing units are
supplied with POE oil, the oil separator is pre-
charged with 0,3l oil. In case of adding oils always
use original Danfoss POE oil from new cans.
After commissioning, the oil level should be
checked and topped up if necessary.
When the compressor is running under stabilized
conditions, the oil level must be visible in the
sight glass. The presence of foam filling in the
sight glass indicates large concentration of
refrigerant in the oil and / or presence of liquid
returning to the compressor. The oil level can also
be checked a few minutes after the compressor
stops, the level must be between ¼ and ¾ of
sight glass. When the compressor is off, the
level in the sight glass can be influenced by the
presence of refrigerant in the oil.
In installations with good oil return and line
runs up to 20 m, no additional oil is required. If
installation lines exceed 20 m, additional oil may
be needed. Oil charge has to be adjusted based
on the oil level in the compressor sight glass.
Top-up the oil while the compressor is idle. Use
the schrader connector or any other accessible
connector on the compressor suction line and a
suitable pump.
The oil fills connection and gauge port is a 1/4”
male flare connector incorporating a Schrader
valve.
Oil changing is not normally necessary for
package units.
1. Compliance between unit and power supply.
2. Check that valves are opened.
Remark: Do not open receiver valve entirely to
get correct pressure to the discharge pressure
transmitter. Turn valve spindle one round (360°) in
close direction. 3. Check that crankcase and oil separator heaters
are working.
4. Check that fan can rotate freely.
5. Check for possible faults in the installation.
6. Check main switch overload protection setting.
29
FRCC.PC.044.A6.02
Application Guidelines