Danfoss OPTYMA Plus Série Instructions page 4

Instructions
8 – 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 ap-
prox. 2 bar for R134a and R513A.
• The remaining charge is done until the instal-
lation has reached a level of stable nominal
condition during operation.
• Never leave the filling cylinder connected to
the circuit.
9 – Setting the electronic controller
• The unit is equipped with an electronic control-
ler which is factory programmed with parame-
ters for use with the actual unit. Refer to Manual
RS8GDxxx 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 mo-
del 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 parame-
ter 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.
For P02 version models (OP-xxxxxxxxxP02E), if
o30 value is 19= R404A or 40=R448A or 41=R449A
in controller,
• 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.
10 – Verification before commissioning
Use safety devices such as safety pressure swit-
ch and mechanical relief valve in compliance with
both generally and locally applicable regulations
and safety standards. Ensure that they are opera-
tional and properly set.
4 | AN18658643414602-001101
Check that the settings of high-pressure swit-
ches and relief valves don't exceed the maximum
service pressure of any system component.
• Verify that all electrical connections are pro-
perly fastened and in compliance with local
regulations.
• When a crankcase heater is required, the unit
must be energized at least 12 hours before ini-
tial start-up and start-up after prolonged shu-
tdown 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 ope-
ration. 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.
11 – Start-up
• Never start the unit when no refrigerant is char-
ged.
• All service valves must be in the open position.
• Rotalock valve on the receiver must be tur-
ned 1 round to close direction to get the right
condensing pressure for the pressure transmit-
ter
• 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 re-
moved 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 confor-
mity and voltage on terminals.
• Eventual reverse rotation of a 3-phase compres-
sor can be detected by following phenomena;
the compressor doesn't build up pressure, it has
abnormally high sound level and abnormally
low power consumption. In such case, shut
down the unit immediately and connect the
phases to their proper terminals.
• If the rotation direction is correct the low pres-
sure indication on the controller (or low pres-
sure gauge) shall show a declining pressure and
the high pressure indication (or high pressure
gauge) shall show an increasing pressure.
12 – 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 slug-
ging.
• 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. Move-
ments 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 com-
pressor 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. Eco-
nomizer 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 clean-
liness, noise and leak detection.
• Record type and amount of refrigerant charge
as well as operating conditions as a reference
for future inspections.
13 – Emergency running without controller
In case of controller failure, the condensing unit
can still be operated when the controller stan-
dard wiring (picture 4) is modified into a tempo-
rary wiring (picture 5) as described below.
This modification may be done by authorized
electricians only. Country legislations have to be
followed.
Disconnect the condensing unit from power
supply (turn hardware main switch off )
• Contact of Room Thermostat must be possible
to switch 250VAC.
• Remove wire 22 (safety input DI3) and wire 24
(room thermostat DI1) and put them together
with an insulated 250 Vac 10mm² terminal
bridge.
• Remove wire 25 (room thermostat DI1) and
wire 11 (compressor supply) and put them
together with an insulated 250VAC 10mm² ter-
minal bridge.
• Remove wire 6 and connect it with terminal
bridge for wire 11 and 25. A fan pressure switch
or fan speed controller can be connected in
series to wire 6.
• Remove wire 14 (crankcase heater) and connect
it to the compressor contactor terminal 22.
• Remove wire 12 (supply crankcase heater),
extend this wire by using an 250 Vac 10mm²
terminal bridge and 1,0mm² brown cable and
connect it to compressor contactor terminal 21
• Remove the large terminal block from the
controller terminals 10 to 19.
• Connect the condensing unit to power supply
(turn hardware main switch on).
14 – Maintenance
Always switch off the unit at main switch be-
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