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Instructions
• PRV to be fitted on liquid receiver at 3/8» NPT
Connection. (Refer Coolselector2 for PRV spare
part code). Use Locatite 554 for PRV fitment.
• Torque: 40Nm (Don't exceed given torque)
• Installer need to take care of where to blow the
leaked refrigerant. Danfoss recommended to
blow refrigerant away form condensing unit.
• Recommended to change PRV when after
discharge, Changing refrigerant
• Don't remove the seal and attempt to reset the
valve.
• Valves must be installed vertically or Horizontally,
but ensure PRV to be fitted above system's liquid
level.
• Ensure refrigerant is released safely to
atmosphere directly.
• Incase of hazard,
additional spare kit has
been designed in order to collect the released
refrigerant. Kit should be installation with proper
piping routing for discharge of refrigerant safely.
(See picture below)
• PRV should not be installed on service valve.
• Replace PRV after clean out of system or bared
out.
• No Detachable joints and valves should not
accessible to public. All brazing joints should
comply with EN 14276-2 and other permanent
joints should comply with EN-16084.
3.2 – PRV Valve for cat II models (Factory mounted)
For Optyma™ Plus INVERTER, condensing units OP-
MPPM065 which falls in PED cat II, PRV is fitted on
receiver rotolock valve from factory.
4 – Installation
• The installation in which the condensing unit is
installed must comply to EC Pressure directive
(PED) no. 2014/68/EU. The condensing unit itself
is not a "unit" in the scope this directive.
• It is recommended to install the unit on rubber
grommets or vibration dampers (not supplied).
• It is not possible to stack unit on top of each other
© Danfoss | Climate Solutions | 2024.06
Unit
Housing 3
(Code no. 114X43--)
• Slowly release the nitrogen holding charge
through the schrader port.
• Connect the unit to the system as soon as pos-
sible to avoid oil contamination from ambient
moisture.
• Avoid material entering into the system while
cutting tubes. Never drill holes where burrs can-
not be removed.
• Braze with great care using state-of-the-art tech-
nique and vent piping with nitrogen gas flow.
• Connect the required safety and control devices.
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 in-
sulation.
• Copper piping material should comply with
EN12735-1. And all pipe joints should comply
with EN14276-2
• At filed installation, support to added according
to size and weight. Recommended maximum
the
spacing for pipe support as per EN12735-1 &
EN12735-2
• Connecting pipes shall be made before opening
the valves to permit refrigerant to flow between
the refrigerating system parts.
5 – Leak detection
Never pressurize the circuit with oxy-
gen 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 32 bar.
• When a leak is discovered, repair the leak and re-
peat 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 supply is
stable (nominal voltage ±10% and nominal fre-
quency ±2,5 Hz)
• Dimension the power supply cables according to
unit data for voltage and current.
• Protect the power supply and ensure correct ear-
thing.
• The earth leakage current exceeds 3.5mA.
DC current can be supplied to the protective
conductor. Where a residual current device (RCD)
Maximum
is used for protection in case of direct or indirect
stacking
contact, only a RCD of Type B is allowed on the
supply side of this product.
0
• Make the power supply according to local stan-
dards and legal requirements.
• For IT power supply systems open the RFI swit-
ch by removing the RFI screw on the left side of
the frequency converter (see Quick Guide MG-
18Mxxx).
• The unit is equipped with an electronic controller.
Refer to manual 118U3808 for details.
• 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. 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 high and low pressure
switches, which directly cut the power supply to
the compressor in case of activation. Parameters
for high and low pressure cut outs are preset in
the controller, adapted to the compressor ins-
talled in the unit.
• The Unit is equipped with compressor drive for
speed regulation. It is mandatory to connect com-
pressor via it's drive as it is shown on the WD of this
instruction.
Correct phase sequence for compressor rotation di-
rection shall be observed.
• correct compressor supply phase sequence is as-
sured from the frequency converter and factory
wiring
• connections from frequency converter to
compressor terminals are shown in the wiring
diagram
8 – Safety
Electrical box door should be in
closed condition before connecting to
power supply.
Discharge tube temperature will
go upto 125°C during unit running
condition.
Recommended to install PRV inside
unit and release of refrigerant should
routed to atmosphere directly.
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
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.
• Compressors are not equipped with an internal
motor protector. motor protection is provided
by the variable speed drive. all parameters are
factory preset in order to guaranty locked rotor
or overload current protection.
• You need to set corresponding to your
installation proper refrigerant (o30), Pump Down
cut-out (c33) and evaporating pressure setting
(R23).
• No valves and detachable joints shall be located
in areas accessible to the general public except
when they comply with EN 16084
• Refrigerant piping shall be protected or enclosed
118A5499A - AN1871864252420
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3-000701
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