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Instructions
(PED) no. 2014/68/EU. The condensing unit itself
is not a "unit" in the scope of this directive.
• The unit must be securely installed on a stable
and rigid support, and fixed from the beginning.
See Annex-A, Picture 2.
• It is recommended to install the unit on rubber
grommets or vibration dampers (not supplied).
• Slowly release the nitrogen holding charge
through the schrader port. Refer image Annex-A,
Picture 3.
• Connect the unit to the system as soon as
possible 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 devices.
When the schrader port is used for this, remove
the dummy cap.
• It is recommended to insulate the suction pipe
from evaporator up to the compressor inlet with
19 mm thick insulation.
• Make sure there is no refrigerant or damage
inside unit and crack in pipes.
• Make sure that all components inside electrical
box are protected against electrical overload
and ''not source of ignition'' from its respective
manufacturer for approved refrigerants.
• Field wiring must be routed through IP65
cable glands and cable entry plate only. For
any additional wire routing drilling or piercing
electrical panel sides strictly prohibited.
• For field wiring, only required hole to be
pierced. No pierced hole should be left without
cable in it. If undesired/unwanted piercing
happens entire gland plate should be replaced.
• Partition panel has dedicated openings for
pre ventilation, do not seal/obstruct/close the
openings in any manner.
• In the event of uncertain leakages, To avoid
refrigerant
concentration
compartment, compressor has a on-time delay
of 30 seconds (factory setting) do not reduce the
setting below 30 seconds.
© Danfoss | Climate Solutions | 2021.06
5 – Leak detection
• Do not use dye for leak detection.
• Perform a leak detection test on the complete
system.
• The maximum test pressure is 25 bar.
• When a leak is discovered, repair the leak and
repeat the leak detection.
6 – Vacuum dehydration
• Never use the compressor to evacuate the
system.
• Connect a vacuum pump to both the LP & HP
sides.
• Vacuum pump must be certified to use in A2L
refrigerant environment or ATEX certified.
• 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
• Verify that all electrical connections inside the
condensing unit are properly fastened as they
could have worked loose during transportation.
• 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
per EN60335-1, EN60204 or local applicable
standard and unit requirement.
• Refer
to
connections details.
• All electrical components must be qualified to
use A2L refrigerants and ''not source of ignition'' .
• Ensure that the power supply corresponds to the
unit characteristics and that the power supply is
stable (allowable voltage tolerance ±10% and
allowable frequency tolerance ±2,5 Hz).
• The power supply cables must be according
to unit data for voltage, current and ambitent
condition. Refer Nameplate for voltage and
current information.
• Protect the power supply and ensure correct
earthing.
• Optyma™ Slim pack condensing unit starting
frequency need to be limited for reciprocating
compressors
- Without starting capacitor 5 starts per hour
maximum.
- With starting capacitor 10 starts per hour
maximum.
• Make the power supply according to local
standards and legal requirements.
• The unit is equipped with high and low pressure
in
compressor
switches, which directly cuts the power supply
to the compressor and provides 230V AC alarm
signals (max. 50VA) in case of activation (Alarm
signal wirings must be done on field. Refer
wiring diagram for more details). Parameters
Never pressurize the circuit with
oxygen or dry air. This could cause
fire or explosion.
wiring
diagram
for
electrical
for high and low pressure cut outs should be
set by installer considering compressor model,
refrigerant and application.
• 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 switch
terminals T1, T2 and T3 respectively.
• Timer should have minimum setting of 30 sec for
pre ventilation. Rotate clockwise and set arrow
to 30s marking or above (refer below image)
8 – Safety
Electrical box door should be in
closed condition before connecting
to power supply.
Units has receive with 3/8» NPT adapter plug.
User can select various options as mentioned in
EN378-2:2016 Article § 6.2.2.3
• The unit/installation into which the condensing
unit is mounted/integrated, must be in
accordance with the PED.
• As per EU F-gas regulation, R1234yf, R454C
& R455A are considered as mildly flammable
refrigerant. Optyma™ Slim Pack units are
qualified with R1234yf, R454C & R455A. All
precaution and safety measure to be taken care
before and after installation.
• All Optyma™ Slim pack condensing units are
supplied with adjustable dual pressure switch
(KP-17WB) with maximum 0.5A current rating.
• In order to avoid electric arc between hermetic
connector pins, compressor must not start or
electrical tests such dielectric strength must not
be performed while the refrigerating system
under vacuum.
• All components should be compatible to
use with specified refrigerants according to
Optyma™ Slim Pack condensing units codes
.Refer Annex A.
• Optyma™ Slim Pack condensing units have
pre ventilation via condenser fan prior to
compressor starting (30 seconds). Never
disconnect or modify timer settings.
• Beware of hot and extremely cold components.
• Beware of moving components. Power supply
should be disconnected while servicing.
9 – Filling the system
• Before filling the refrigerant into the Optyma™
Slim Pack condensing unit wear appropriate
Personal Protective Equipment (PPE).
• Never start the compressor under vacuum. Keep
the compressor switched off.
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