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9
IMPROVING SYSTEM EFFICIENCY
Air flow direction adjustment
1. To improve the effects of cooling and heating, use the outlet louver appropriately for cooling and heating
operations. When in cooling operation the most efficient louver position will be horizontal and when in heating
operation the optimum louver position is downwards.
Increasing heating effect
1. One method increase the warming effect is to fit an additional means of re-circulating the warmed air from the
upper part of the room :
2. However if the warming effect of the air conditioner is not good owing to the installation position or the structure of
the room, then reset the room temperature regulator as follows to raise the temperature of the room. Adjust
position 1 and 2 on DIP switch SW03 located on the indoor P.C. board, according to the table below :
Options
Test operation
To switch the TEST RUN (COOL) mode, push TEMPORARY button for 10
seconds. (The beeper will make a short beep.)
10
FINAL INSTALLATION CHECKS
Precautions
1. Ensure that the electrical cable used for
power supply and control of the system is
unable to come into contact with either
service valves or piping work which are not
insulated.
Electrical wiring
1. When installation is complete, check that all
power supply and interconnecting wiring has
been appropriately protected.
Refrigerant piping
1. When refrigerant and drain piping have been
completed. Ensure that all pipework is fully
insulated and apply finishing tape to seal the
insulation.
Check and Test Operation
• Pressure of R410A is approx. 1.6 times of that of R22.
If installation work is incompletely finished, a gas leakage
may occur at the cases such as pressure rise during
operation.
Therefore, be sure to test the piping connections for leakage.
• Check the flare nut connections, valve stem cap
connections and service port cap fittings
for gas leak with a leak detector or soap water.
Dip switch SW03
position 1 & 2
Temperature increased
Position 1 : ON Position 1 : OFF Position 1 : OFF
Position 2 : OFF Position 2 : ON Position 2 : OFF
Factory pre-set +2°C+4°C
TEMPORARY button
Valve
cover
Cord clamp
Piping cover
Indoor/outdoor
connecting cables
Power cable
Flare nut
connections
(Indoor unit)