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Example: Automatic mode during cooling
T
c
120°F
(49°C)
C
115°F
(46°C)
D
36°F (2°C)
A Virtual load curve (default automatic mode peak capacity)
B Load curve
C Virtual target value (initial condensation tempera-
ture value automatic mode)
D Design temperature
E Load factor
F Outside air temperature
T
Condensing temperature
c
Quick
Powerful
Mild
Room temperature evolution:
A
F
E
D
B
A Indoor unit set temperature
B Operation start
C Operating time
D Mild
E Quick
F Powerful
39
E
100%
A
B
70%
F
C
No matter which control is selected, variations on the behavior of the
system are still possible due to protection controls to keep the unit
operating under reliable conditions. The intentional target, however,
is fixed and will be used to obtain the best balance between energy
consumption and comfort, depending on the application type.
15.4. Test operation
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run must be
performed according to the procedures described below.
15.4.1.
Precautions before starting test operation
During test operation, the outdoor units and the indoor units will start
up:
• Make sure that the preparations of all indoor units are finished (field
piping, electrical wiring, air purge, etc.). See installation manual of
the indoor units for details.
CAUTION
Do not insert fingers, rods or other objects into the air inlet or outlet.
When the fan is rotating at high speed, it will cause injury.
CAUTION
Do not perform the test operation while working on the indoor units.
When performing the test operation, not only the outdoor units, but the
connected indoor units will operate as well.
Working on indoor units while performing a test operation is danger-
ous.
CAUTION
• During tests never pressurize the appliances with a pressure higher
than the maximum allowable pressure (as indicated on the name-
plate of the unit).
• If refrigerant gas leaks, ventilate the area immediately. Toxic gas
may be produced if refrigerant gas comes into contact with fire.
• Never directly touch any accidental leaking refrigerant. This could
result in severe wounds caused by frostbite.
• Test run is possible for ambient temperatures between -4°F and
95°F (-20°C and 35°C).
DANGER: DO NOT TOUCH PIPING AND INTERNAL PARTS
See Safety considerations on page i.
DANGER:ELECTRICAL SHOCK
See Safety considerations on page i.
• Provide a logbook and machine card.
In accordance with the applicable legislation, it may be necessary to
provide a logbook with the equipment containing at least: informa-
tion on maintenance, repair work, results of tests, stand-by periods,
etc.
English
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