Danfoss OPTYMA Plus Manual De Instrucciones página 4

Instructions
sible to avoid oil contamination from ambient
moisture.
• Avoid material entering into the system while
cutting tubes. Never drill holes where burrs
cannot be removed.
• Braze with great care using state-of-the-art
technique and vent piping with nitrogen gas
flow.
• Connect the required safety and control de-
vices. When the schrader port is used for this,
remove the internal valve.
• It is recommended to insulate the suction pipe
up to the compressor inlet with 19 mm thick
insulation.
Note: Before installing optionally supplied Fans
speed controller, all the recommended safety pro-
tocols must be followed. Electrical connections must
be done as per the Wiring diagram
5 – Leak detection
Never pressurize the circuit with
oxygen or dry air. This could cause
fire or explosion.
• Do not use dye for leak detection.
• Perform a leak detection test on the complete
system.
• The maximum test pressure is 31*
• When a leak is discovered, repair the leak and
repeat the leak detection.
6 – Vacuum dehydration
• Never use the compressor to evacuate the sys-
tem.
• Connect a vacuum pump to both the LP & HP
sides.
• Pull down the system under a vacuum of 500
µm Hg (0.67 mbar) absolute.
• Do not use a megohmmeter nor apply power
to the compressor while it is under vacuum as
this may cause internal damage.
7 – Electrical connections
• Switch off and isolate the main power supply.
• Ensure that power supply can not be switched
on during installation.
• All electrical components must be selected as
per local standards and unit requirements.
• Refer to wiring diagram for electrical connec-
tions details.
• Ensure that the power supply corresponds to
the unit characteristics and that the power sup-
ply is stable (nominal voltage ±10% and nomi-
nal frequency ±2,5 Hz).
• Dimension the power supply cables according
to unit data for voltage and current.
• Protect the power supply and ensure correct
earthing.
• Make the power supply according to local stan-
dards and legal requirements.
• The unit is equipped with a main switch with
overload protection. The overload protection is
factory preset but it is recommended to check
the value before taking the unit in operation.
4 | AN37374141535501-010101 - 118A2984A
The value for the overload protection can be
found in the wiring diagram in the front door of
the unit.
• The unit is equipped with Dual Pressure swit-
ch, which directly cut the power supply to the
compressor in case of activation.
• P07 models
ped with phase sequence relay to pro-
tect the unit against phase loss/sequence/
asymmetry
Correct phase sequence for compressor rotation
direction shall be observed.
• Determine the phase sequence by using a
phase meter in order to establish the phase
orders of line phases L1, L2 and L3.
• Connect line phases L1, L2 and L3 to main swit-
ch terminals T1, T2 and T3 respectively.
8 – Safety
Fusible Plug is not installed in unit, it is replaced
with adapter blanking plug.
Unit has liquid receiver with an Adapter Plug with
3/8" NPT connection. installer/end user can select
various options as mentioned in EN378-2 : 2016
Article § 6.2.2.3
• The unit/installation into which the condensing
bar. unit is mounted/integrated, must be in accor-
)
dance with the PED.
• Beware of extremely hot and cold components.
• Beware of moving components. Power supply
should be disconnected while servicing.
9 – Filling the system
• Never start the compressor under vacuum.
Keep the compressor switched off.
• Use only the refrigerant for which the unit is
designed for.
• Fill the refrigerant in liquid phase into the
condenser or liquid receiver. Ensure a slow
charging of the system to 4 – 5 bar for R404A/
R448A/R449A/R407A/R407F/R452A and ap-
prox. 2 bar for R134a and R513A.
• The remaining charge is done until the instal-
lation has reached a level of stable nominal
condition during operation.
• Never leave the filling cylinder connected to
the circuit.
10 – Verification before commissioning
Use safety devices such as safety
pressure switch and mechanical
relief valve in compliance with both
generally and locally applicable
regulations and safety standards.
Ensure that they are operational and
properly set.
Check that the settings of high-pres-
sure switches and relief valves don't
exceed the maximum service pres-
sure of any system component.
• Verify that all electrical connections inside the
condensing unit are properly fastened as they
could have worked loose during transporta-
tion.
can be optionally equip-
and under-/over-voltage.
• When a crankcase heater is required, the unit
must be energized at least 12 hours before ini-
tial start-up and start-up after prolonged shu-
tdown for belt type crankcase heaters.
11 – Start-up
• Never start the unit when no refrigerant is char-
ged.
• All service valves must be in the open position.
• 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 re-
moved from the backside of condenser.
• Balance the HP/LP pressure.
• Energize the unit. It must start promptly. If the
compressor does not start, check wiring confor-
mity and voltage on terminals.
• Eventual reverse rotation of a 3-phase compres-
sor can be detected by following phenomena;
the compressor doesn't build up pressure, it
has abnormally high sound level and abnor-
mally low power consumption. P07 models can
be optionally equipped with a phase-reversal
relay. In case of wrong phase sequence there
will be an error indication on the phase-rever-
sal relay and the compressor will not start. In
such case, shut down the unit immediately and
connect the phases to their proper terminals.
• If the rotation direction is correct the low pres-
sure indication on the low pressure gauge) shall
show a declining pressure and the high pressure
gauge shall show an increasing pressure.
12 – Check with running unit
• Check the fan rotation direction. Air must flow
from the condenser towards the fan.
• Check current draw and voltage.
• Check suction superheat to reduce risk of slug-
ging.
• When a 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.
• Check all tubes for abnormal vibration. Move-
ments in excess of 1.5 mm require corrective
measures such as tube brackets.
• When needed, additional refrigerant in liquid
phase may be added in the low-pressure side as
far as possible from the compressor. The com-
pressor 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 atmosphere.
• Before leaving the installation site, carry out a
general installation inspection regarding clean-
liness, noise and leak detection.
• Record type and amount of refrigerant charge
as well as operating conditions as a reference
for future inspections.
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