Instructions
118A2221A - AN363632996019en-ZA0101 | 3
© Danfoss | DCS (CC) | 2020.12
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 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 internal valve.
• It is recommended to insulate the suction pipe
up to the compressor inlet with 19 mm thick
insulation.
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 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.
• 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
connections details.
•
Ensure that the power supply corresponds
to the unit characteristics and that the power
supply is stable (nominal voltage ±10% and
nominal 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
standards and legal requirements.
•
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 installed in the unit.
•
P05 models are also equipped with phase
sequence relay to protect the unit against
phase loss/sequence/ asymmetry and under-/
over-voltage.
For units with a 3-phase scroll compressor (OP-
MPXMxxxxxxxxE), 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
switch 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
• Optyma Plus fitted with atmospheric pressure
relief valve. Don’t connect any tube at end of the
pressure relief valve.
• Once the pressure relief valve opens, don’t use
dry air or oxygen to evacuate the refrigerants.
• Optyma Plus (P06 version only) factory fitted
with pressure relief valve at 33 bar setting.
•
Once pressure relief valve opens, Danfoss
recommended to replace new pressure relief
valve.
• The unit/installation into which the condensing
unit is mounted/integrated, must be in
accordance 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
approx. 2 bar for R134a and R513A.
•
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.
10 – Setting the electronic controller
• The unit is equipped with an electronic controller
which is factory programmed with parameters
for use with the actual unit. Refer to Manual
118U3808 for details.
•
By default, the electronic controller display
shows the temperature value for the suction
pressure in °C. To show the temperature value for
the condensing pressure, push the lower button
(picture 3).
The electronic controller is factory preset for R404A
or R449A or R452A or R134a depending on the
model of compressor mounted and application
(Refer Annexx in Optyma Controller installation
manual). If another refrigerant is used, the
refrigerant setting must be changed. Parameter
r12 must be set to 0 before (software main switch=
off).
• Push the upper button for a couple of seconds.
The column with parameter codes appears.
• Push the upper or lower button to find parameter
code o30.
• Push the middle button until the value for this
parameter is shown.
• Push the upper or lower button to select the new
value: 2 = R22, 3 = R134a, 36 = R513A, 17 = R507,
19 = R404A, 20 = R407C , 21 = R407A, 37 = R407F,
40 = R448A, 41 = R449A, 42 = R452A.
• Push the middle button to confirm the selected
value.
• Push the upper or lower button to find parame-
ter code r84.
• Push the middle button until the value for this
parameter is shown as 125
• Push the upper button to select the new value:
130.
11 – 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-pressure
switches and relief valves don’t exceed the
maximum service pressure of any system
component.
• Verify that all electrical connections inside the
condensing unit are properly fastened as they
could have worked loose during transportation.
• When a crankcase heater is required, the unit
