Instructions
4 | AN18658643414604-001701 - 118A5382A
© Danfoss | Climate Solutions | 2022.02
in areas accessible to the general public except
when they comply with EN 16084
• Refrigerant piping shall be protected or enclosed
to avoid damage.
• Field piping should be installed such that it will
be free from corrosive or salty environment to
avoid corrosion in copper /Aluminum piping.
• In case of fire incidence, pressure increases due
to increasing in temperature at receiver. Hence it
is very important to install the PRV.
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.
•
Suction, Liquid valves and Receiver Rotolock
valves as Schrader port for service operation like
Gas Charging, pressure measurement.
10 – Setting the electronic controller
For P02 version models (OP-
xxxxxxxxxP02E), if o30 value is 19=
R404A or 40=R448A or 41=R449A in
controller.
Change controller parameter o37
to 1 in case of SPPR retrofit. In
case you add the SPPR (Supply
monitoring relay) option to protect
the compressor please change the
setting o37 from 0 to 1
• 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: 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 (r84 = Maximum allowable discharge
temperature).
•
Push the middle button, default maximum
discharge temperature is 125°C
• If customer want to increase the valve, push the
upper button to select the new value: 130 push
middle button to confirm the selected value.
• Maximum allowable discharge temperature (r84)
should not exceed 130 °C
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
must be energized at least 12 hours before initial
start-up and start-up after prolonged shutdown
for belt type crankcase heaters.
• The unit is equipped with a main switch with
overload protection. Overload protection is
preset from factory, but it is recommended
to check the value before taking the unit in
operation. The overload protection value can
be found in the wiring diagram in the unit front
door.
• Check if discharge temperature sensor is firm and
has proper contact with discharge pipe.
• Pressure drop in the suction and liquid line pipes
must be evaluated as per evaporator location
and distance (refer coolselector2).
12 – Start-up
•
Never start the unit when no refrigerant is
charged.
• All service valves must be in the open position.
• Rotalock valve on the receiver must be turned
1 round to close direction to get the right
condensing pressure for the pressure transmitter
•
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
removed 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
conformity and voltage on terminals.
• Eventual reverse rotation of a 3-phase compressor
can be detected by following phenomena; the
compressor doesn’t build up pressure, it has
abnormally high sound level and abnormally low
power consumption. P05 models are equipped
with a phase-reversal relay and compressor
doesn’t start, the compressor doesn’t build up
pressure, in case of wrong phase sequences. In
such case, shut down the unit immediately and
connect the phases to their proper terminals.
• If the rotation direction is correct the low pressure
indication on the controller (or low pressure
gauge) shall show a declining pressure and the
high pressure indication (or high pressure gauge)
shall show an increasing pressure.
13 – 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
slugging.
• 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.
Movements 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 compressor
must be operating during this process.
• For P02 version models (OP-xxxxxxxxxP02E) :
- Check sight glass and make sure no bubbles in
liquid line for proper liquid injection.
- When o30 is set 19= R404A or 40=R448A or
41=R449A and readout U26 > 125 in controller,
check and make sure liquid injection is ON.
Economizer inlet pipe should be cold.
• 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
cleanliness, noise and leak detection.
• Record type and amount of refrigerant charge
as well as operating conditions as a reference for
future inspections.
14 – Emergency running without controller
In case of controller failure, the condensing unit
can still be operated when the controller standard
wiring (picture 4) is modified into a temporary
