Safe Refrigerant Handling; Rooftop Installations; Refrigerant Lines - Daikin CONDENSING UNIT Installation Instructions Manual

Another important consideration in selecting a location for the
unit(s) is the angle to obstructions. Either side adjacent the valves
can be placed toward the structure provided the side away from
the structure maintains minimum service clearance. Corner in-
stallations are strongly discouraged.
Minimum Airflow Clearance
Model Type
Residential
Light Commercial
This unit can be located at ground floor level or on flat roofs. At
ground floor level, the unit must be on a solid, level foundation
that will not shift or settle. To reduce the possibility of sound
transmission, the foundation slab should not be in contact with
or be an integral part of the building foundation. Ensure the foun-
dation is sufficient to support the unit. A concrete slab raised
above ground level provides a suitable base.

Rooftop Installations

If it is necessary to install this unit on a roof structure, ensure the
roof structure can support the weight and that proper consider-
ation is given to the weather-tight integrity of the roof. Since the
unit can vibrate during operation, sound vibration transmission
should be considered when installing the unit. Vibration absorb-
ing pads or springs can be installed between the condensing unit
legs or frame and the roof mounting assembly to reduce noise
vibration.
A B C
10" 10" 18"
12" 12" 18"
To avoid possible injury, explosion or death, practice safe
handling of refrigerants.

Safe Refrigerant Handling

While these items will not cover every conceivable situation, they
should serve as a useful guide.
To avoid possible explosion:
• Never apply flame or steam to a refrigerant cylinder. If you
must heat a cylinder for faster charging, partially immerse
AA
it in warm water.
20" • Never fill a cylinder more than 80% full of liquid refrigerant.
• Never add anything other than R-22 to an R-22 cylinder or
24"
R-410A to an R-410A cylinder. The service equipment used
must be listed or certified for the type of refrigerant used.
• Store cylinders in a cool, dry place. Never use a cylinder
as a platform or a roller.
To avoid possible explosion, use only returnable (not disposable)
service cylinders when removing refrigerant from a system.
• Ensure the cylinder is free of damage which could lead to a
leak or explosion.
• Ensure the hydrostatic test date does not exceed 5 years.
• Ensure the pressure rating meets or exceeds 400 PSIG.
When in doubt, do not use cylinder.

Refrigerant Lines

The compressor POE oil for R-410A units is extremely susceptible
to moisture absorption and could cause compressor failure. Do
not leave system open to atmosphere any longer than necessary
for installation.
2
CAUTION