Danfoss Optyma Light Commercial Instructions Manual page 3

Instructions
9. Connection to vacuum pump
10. Connection to charging cylinder
Connect the discharge line to the suction stop
valve (1) of the unit.
Connect the suction line, via the filter drier, to
the discharge stop valve (2).
Make the connection (3) between the manifold
and the service connector of the suction stop
valve (1).
Make the connection (6) between the manifold
and the service connector of the discharge stop
valve (2).
Make the connection (9) between the vacuum
pump and the manifold (4).
Make the connection (10) between the
charging cylinder and the manifold (5).
Remove the protective caps from the spindles
of both stop valves (1) and (2).
Open valves (4), (7) and (8). Open stop valves (1)
and (2) to mid position. Start the vacuum pump.
Vacuum pumps, which are normally used for
refrigerants containing chlorine, cannot be
used with R134a, R404A/R507 and R452A.
Only a vacuum pump with special Polyolester
oil may be used for systems with refrigerant
containing FCKW, HFCKW and HFKW.
(Contact the pump supplier.)
Evacuation (T0, A00)
Evacuation takes place through the compressor
then process connector after complete
connection in the refrigerating circuit.
Plan sufficient time for the evacuation as it
takes place from the low pressure side only,
unless additional measures were taken to speed
up the evacuation.
Vacuum pumps normally used for refrigerants
containing chlorine must not be used with
R134a and R404A/R507. Only a vacuum pump
with special Polyolester oil may be used for
systems with refrigerant containing FCKW,
HFCKW and HFKW. (Contact the pump supplier.)
6 – Electrical connections
• Prepare the electrical connections while
evacuation is taking place. Do not start the
compressor until the vacuum has been
broken. Remove the cover over the terminal
board. Connect the leads.
• It is impossible to start the unit without a
thermostat (1H see Annex C , fig. 2) being
connected or a lead between 1 or 2,
respectively, and L has been established
(Annex C Fig. 3-16).
Annex C Fig. 3. Wiring diagram for the
compressor platform: P, T, N, F, S.
Annex C Fig. 4. Wiring diagram for the
compressor platform: SC with CSR (starting and
operating capacitor).
Annex C Fig. 5. Wiring diagram for the
compressor platform: TL, FR and SC condensing
units with pressure control.
Annex C Fig. 6. Wiring diagram for the
compressor platform: SC condensing units with
combined high and low pressure control and
CSR (starting and operating capacitor).
Annex C Fig. 7. Wiring diagram for the
compressor platform: MP & ML condensing
units.
Annex C Fig. 8. Wiring diagram for Twin
compressor, see SC.
Annex C Fig. 9. Wiring diagram for Twin
compressor, with 50% of fan speed.
© Danfoss | Climate Solutions | 2022.05
Annex C Fig. 10-16. Wiring diagram for R290
models.
1A. Main winding
1B. Start winding
1C. Start relay
1D. Winding protector
1E. Start capacitor
1F. Bleeder resistance
1G. Run capacitor
1H. Thermostat
1J. Fan
1K. Pressure control
Fit the terminal board cover.
Keep away flammables from the electrical
equipment.
7 – Declaration of conformity
• All our condensing units are complied with
low voltage directive 2014/35/EU and must
be incorporated during installation.
• Low Voltage Directive 2014/35/EU
EN 60335-1:2012 + A11:2014- Household and
similar electrical appliances-Safety-Part 1:
General requirements-for all above mentioned
condensing units with compressor platforms
FR, GS, L, P, NF, NL, PL, SC and TL.
• Eco-design DIRECTIVE 2009/125/
EC, establishing a framework for the setting
of Eco-design requirements for energy-
related products.
• REGULATION (EU)
2015/1095, implementing Eco-design
Directive 2009/125/EC with regard to
Eco-design requirements for professional
refrigerated storage cabinets, blast cabinets,
condensing units and process Chiller.
• Condensing unit measurements are made
according to standard "EN 13771-2:2007"
– Compressor and condensing units for
refrigeration-performance testing and test
methods- part 2: Condensing units
• The following approvals must be obtained
through authorised institutes like Nemko,
Demko, BEAB, LCJE, etc. Among others EN 60
335-2-24, IEC 335-2-89, IEC 79-15.
8 – Safety
Important service and safety tips
The drier must always be replaced when a
system has been opened.
Blow through the system with dry nitrogen before
soldering.
When a defective system is emptied the
refrigerant must be collected without mixing
with other refrigerants, and the refrigerant
must not leak into the environment.
(See also "Installation").
The condenser and the complete condensing
unit must be cleaned regularly.
Specified maintenance and cleaning intervals
must be observed.
Working on components that are under
pressure is dangerous.
Beware of hot and extremely cold components.
Beware of moving components (e.g. fan).
Pay attention to sufficient ventilation.
Check the perfect operation of the fan.
The application limits stated by the
manufacturer must be observed.
If pressure controls are specified, they must be
installed professionally.
The operating condition must be monitored in
order to ensure perfect operation.
Check whether the shut-off valves (suction and
discharge side) are completely opened.
Ensure that EN 378 is observed.
If forced ventilation is necessary, this is to be
clearly shown (i.e. by a label).
Do not install in aggressive, moist or dusty
environment.
Do not install or start in rooms containing
flammable gases or in installations operating
with such.
Pressure Equipment Directive 2014/68/EU
EN 378-2:2016
Condensing units are no „units" in accordance
with the PED.
The unit/installation into which the condensing
unit is mounted/integrated, must be in
accordance with the PED.
9 – Maximum refrigerant charges
It is recommended that only the right quantity
of refrigerants necessary for correct function of
the refrigeration system be added.
For refrigeration systems with capillary tube the
charge must be adapted to suit each system
type.
The operating charge must never exceed the
capacity of condenser and receiver.
Always avoid excess refrigerant charge!
Crankcase heater
If the maximum amounts of refrigerant cannot
be observed in T0, T2, A01, A02, A04 or T0
condensing units respectively, a crankcase
heater or a pump-down transmission must be
used. The crankcase heater must be fitted
directly over the weld.
The crankcase heater will heat the compressor
oil during standstill periods. When the
refrigeration system has been at a stand-still for
longer periods the crankcase heater must be
cut in 2-3 hours before starting. The following
crankcase heaters are recommended
TL and FR: 35 W (code no. 192H2095)
SC: 55W (code no. 192H2096)
10 - Cold start
After installing the unit the compressor must be
allow-ed to assume a temperature higher than
10°C before it is started for the first time. This
will prevent possible start problems caused by
too high oil viscosity.
At lower temperatures some tripping of the
winding protector may be expected until the
viscosity of the oil becomes reduced.
See also crankcase heater.
Never start during vacuum!
11 - Winding protector
The compressors have a built-in winding
protector. If the protector cuts out while the
compressor is cold it may take approx. 5
minutes for the protector to reset.
If the winding protector cuts out while the
compressor is hot (compressor housing above
80°C) up to 45 minutes may pass before the
protector resets.
Checking the winding protector
In the event of a compressor failure a check
must be made by resistance measurement
direct on the current lead-in to find out whether
the fault is due to motor damage or simply a
winding protector trip.
Annex C Fig. 3. Location of the winding
protector in the electrical circuit.
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