Maintenance Instructions - Saunier Duval 050 EKI Installation Manual

4- OUTDOOR UNIT INSTALLATION
4.4 CHECKING THE PIPE CONNECTIONS FOR
GAS LEAKING
- For both the indoor and outdoor unit sides, check
the joints for gas leaking by the use of a gas
leakage detector without fail when the pipes are
connected.
4.5 HEAT INSULATION ON THE PIPE JOINTS
- Put coupler heat insulator on the joints.
AIR PURGE
- Check if the piping connections are secure.
- Check that the stems of both 3- way valves are
closed fully.
- Operate the vacuum pump and start pump
down.
- Pump down the system for at least 15 minutes,
then check if the compound pressure gauge reads
- 100kPa (- 76 cm Hg, -1bar)
- At the end of pump down, close the low pressure
side gauge of the gauge manifold fully and stop
the vacuum pump.
- Slowly loosen the valve stem of the 3- way
valve.
- Firmly tighten both 3- way valves blank cap and
the charging port cap.
ADDITIONAL CHARGE
- Refrigerant suitable for a piping length of 10 m. is
charged in the indoor unit at the factory.
- When the piping is longer than 10 m., additional
charging is necessary.
4.6 GAS LEAKAGE INSPECTION
WARNING!- After connecting the piping, check the
joints for gas leakage with gas leak detector.
4.7 POWER
(1) The rate voltage of this product is monophase
(230V/1Ph/50 Hz) or triphase (400V/3Ph/50Hz).
(2) Perform wiring work in accordance with stan-
dards so that the room air conditioner can be
operated safely and positively.
4.8 ELECTRICAL WIRING
(1) Connect the connection cords fi rmly to the
terminal block. Imperfect installation may
cause a fire.
(2) If the indoor unit connection cord (to the
outdoor unit) and power supply are wired inco-
rrectly, the air conditioner may be damaged.
(3) Always connect the ground wire.

4.9 MAINTENANCE INSTRUCTIONS

- Never add oil to the appliance; the compressor
is filled with polyaldohol oil, a special oil which
cannot tolerate the presence of other oils.
- The instruments used for filling, pressure measu-
rements, emptying under vacuum and recovering
the fluid, must be compatible and only used for
the R-407C fluid.
- The weight of the refrigerant contained in the
storage bottle must be checked constantly. Do
not use it from the moment the remaining weight
is less than 10% of the total weight.
- In the case of a new charge do not use the char-
ging cylinder, use a balance and a dip pipe type
R-407C cylinder, charge the weight of R-407C as
per the value indicated on the unit's identification
plate (for "split systems", refer to the installation
instructions as the charge must consider the
length of the connecting lines).
- The charge must be undertaken in liquid phase.
- In the case of leakage, do not complete the
charge: recover the remaining refrigerant or
recycling and perform a total charge. Recovery,
recycling or the destruction of the fluid must be
done in compliance with the laws in force in the
country concerned.
- If the refrigerant circuit is opened, you must
avoid the entry of air into the circuit as much as
possible, replace the filter drier and perform the
"vacuum operation" at a minimum level of 3.0
mbar (static).
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