Idiomas disponibles
Idiomas disponibles
Instructions
• If additional oil is required please refer to the
compressors label for type of oil. Check the
Compressor application guideline for minimum
oil level limit before refilling.
• Use only the refrigerant for which the unit is
designed for.
• For glide refrigerants such as R454C, R455A,
R448A, R449A, R452A use liquid valve in the
refrigerant cylinder to charge.
• Fill the refrigerant in liquid phase into the
condenser or liquid receiver. Ensure a slow
charging of the system to 4 – 5 bar for R448A,
R449A, R452A, R407A, R407F, R507, R404A, ,
R454C or R455A and approx. 2 bar for R134a,
R513A. R1234yf.
• Do not put liquid refrigerant through suction
line.
• It is not allowed to mix additives with the oil
and/or refrigerant. The remaining charge is
done until the installation has reached a level of
stable nominal condition during operation.
• Never leave the filling cylinder connected to the
circuit.
• When charging A2L refrigerant make sure that
the charging area is well ventilated
10 – Verification before commissioning
Use safety devices such as safety
pressure switch and mechanical
relief
valve
(not
compliance with both International
and local applicable regulations and
safety standards. Ensure that they
are operational and properly set.
Check that the settings of high-
pressure switches and relief valves
don't exceed the maximum service
pressure of any system component.
• Verify that all electrical connections are properly
fastened and in compliance with international
and local regulations.
• When a crankcase heater is required, it must be
energized at least 12 hours before initial start-up
and start-up after prolonged shut-down period.
• Crankcase heater must be firmly fixed with
compressor shell. Ensure that it does not fall
down.
• Electrical panel door must be firmly closed using
the knob in door panel. For W09 version only,
the front door of the Electrical box is fastened
by 4 screws on each corners. See below image
for more details.
• All interconnecting tubes with
suction) Optyma™ Slim pack condensing unit
must be sized properly depending upon the
evaporator location.
4 | AN37261865152501-010201 - 118A2176B
• Pressure drop in the liquid line pipes must
be evaluated as per evaporator location and
distance (refer coolselector2).
• Optyma™ Slim Pack condensing units suction/
discharge pressure and temperatures must be
within the operating envelope, never operate
condensing unit suction pressure below
absolute pressure (vacuum).
11 – Start-up
• Never start the unit when no refrigerant is
charged.
• All service valves must be in the open position.
See picture 3.
• Check compliance between unit and power
supply.
• Check that the crankcase heater is working.
• Check that the fan can rotate freely.
• Check that the protection sheet has been
removed from the backside of condenser.
• Balance the HP/LP pressure.
• Energize the unit. Condenser fan must start
promptly and after 30 seconds of time delay the
compressor starts (pre ventilation).
• If the fan motor rotation direction is correct the
low pressure indication on the low pressure
gauge shall show a declining pressure and the
high pressure indication on the high pressure
gauge shall show an increasing pressure.
supplied)
in
• Ensure you have read the installation guideline
that is delivered with the condensing unit
• Only use the correct refrigerant(s) as detailed on
the data plate
• Check compressor oil level
• Check all mechanical connections are tight
• Check all electrical overload settings are correct
(See Annex D - Wiring Drawing).
12 – Check with running unit
• Check the fan rotation direction. Air must flow
from the condenser towards the fan.
• Check current drawn and voltage.
• Check suction superheat to reduce risk of liquid
slugging.
• For
glide
difference between saturated dew point at
suction pressure and Suction line temperature
on the tube.
• When a compressor sight glass is provided
observe the oil level at start and during
operation to confirm that the oil level remains
visible.
• Respect the operating limits.
• Optyma™ Slim Pack condensing units are
designed to operate up to 43°C. During normal
operation or peak operation, saturated dew
point condensing temperature not to exceed
corresponding to 63 °C for R448A, R449A, R452A,
R454C, R455A. Saturated dew point condensing
temperature not to exceed corresponding to
(liquid and
65 °C for R134a, R513A & R1234yf.
• Check all interconnecting tubes are free
from abnormal vibrations. If in case of excess
refrigerants
use
temperature
vibrations, require corrective measures such as
supporting brackets, clamps.
• When needed, additional refrigerant in liquid
phase may be added in the low-pressure side
as slow and far away as possible from the
compressor. The compressor must be operating
during this process.
• Do not overcharge the system.
• Follow the local regulations for restoring the
refrigerant from unit.
• Never release refrigerant to free atmosphere.
• Before leaving the installation site, carry out
a general installation inspection regarding
cleanliness, noise and leak detection.
• Record type and amount of refrigerant charge
as well as operating conditions as a reference for
future inspections.
• Check refrigerant charge and running currents
of motors to ensure correct operation
• Check compressor suction superheat to reduce
risk of liquid slugging
• Allow the system to run for 3 – 4 hours. Check
compressor oil level and top up with the correct
oil type as identified on the data plate of the unit
and compressor
• Recheck the compressor oil level again after 24
hours operation
• Carry out final leak test and ensure all covers are
fitted and all screws fastened
• Complete refrigerant labelling to comply with
local standard
• Ensure maintenance is carried out in accordance
with the installation instructions
13 – Maintenance
Always switch off the unit at main
switch before removing fan panel.
Internal
pressure
temperature are dangerous and
may cause permanent injury.
Maintenance
operators
installers
require
PPEs, skills, tools to carryout the
maintenance
activity.
temperature may exceed 100°C and
can cause severe burns.
Ensure
that
periodic
inspections
to
reliability and as required by local
regulations are performed.
To prevent system related problems, following
periodic maintenance is recommended:
• Verify that safety devices are operational and
properly set.
• Ensure that the system is leak tight.
• Check the compressor current draw.
• Confirm that the system is operating in a way
consistent with previous maintenance records
and ambient conditions.
• Check that all electrical connections are still
adequately fastened.
• Keep the unit clean and verify the absence of
rust and oxidation on the unit components,
tubes and electrical connections.
© Danfoss | Climate Solutions | 2021.06
and
surface
and
appropriate
Tubing
service
ensure
system
