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Instructions
in such a way that oil return for the compressor
is ensured and the risk of liquid slug over in
compressor is eliminated.
• In Optyma condensing unit has suction and
liquid service valve with schrader port for field
service operation
• Optyma Plus unit codes 114X34-- and 114X44--
have two inline receivers with valves. Make sure
both the valves are open before starting.
3.1 – PRV Valve
For Optyma™ Plus, Condensing units
which are fall in PED cat II, PRV is factory
fitted with 34.5 ±1 bar presetting. (See
Technical data for PED category in
Annex A).
For Optyma™ Plus, Condensing units
which are fall in PED cat I, PRV shall
be fitted (See Technical data for PED
category in Annex A).
PRV is used as damage limiting device,
not as pressure limiting device.
• 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 from 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, an 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.
• Optyma Plus unit codes 114X34-- and 114X44--
have a PRV assembled at one of receiver. In other
receiver, a blind plug is installed.
© Danfoss | Climate Solutions | 2023.05
1. HP Pressure Transmitter
2. Pressure Relief Valve
3. ACB Pressure Switch
4. Gas Equalization Port
5. Liquid Equalization Port
4 – Installation
• Installation/servicing
condensing units must be carried out by
qualified personnel with respect to applicable
local/international regulation and with the
correct user Personal Protective Equipment
(PPE).
• The installation in which the condensing unit is
installed must comply to pressure Equipment
Directive (PED) 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. Refer Annex - A.
• It is recommended to install the unit on rubber
grommets or vibration dampers (not supplied).
• It is possible to stack units on top of each other.
Unit
Housing 1
(Code no. 114X31-- or 114X41--)
Housing 2
(Code no. 114X32-- or 114X42--)
Housing 3
(Code no. 114X33-- or 114x43--)
Housing 4
(Code no. 114X34-- or 114x44--)
• When stacking, the topmost unit must be
secured to the wall, as shown in picture 2.
• Slowly release the nitrogen holding charge
through the schrader port.
• Connect the unit to the system as soon as
possible to avoid oil contamination from ambient
the
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.
118U5258 - Spare part, cable gland
• Partition panel and base plate has dedicated
openings for pre ventilation, do not seal /
obstruct / close the openings in any manner.
of
Optyma™
Plus
• In the event of uncertain leakages, to avoid
refrigerant
compartment, Fan starts before compressor with
ON time delay of 30 seconds for compressors.
• Copper piping material should comply with
EN12735-1. And all pipe joints should comply
with EN14276-2
• At filed installation, support to added according
Maximum
to size and weight. Recommended maximum
stacking
spacing for pipe support as per EN12735-1 &
EN12735-2
3
• Connecting pipes shall be made before opening
the valves to permit refrigerant to flow between
2
the refrigerating system parts.
2
5 – Leak detection
2
• 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 for quicker and efficient evacuation.
• 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 or 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
118A2177D - AN37261897352601-010401 | 3
concentration
in
compressor
Never pressurize the circuit with
oxygen or dry air. This could cause
fire or explosion.
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