Installation Clearances; Rooftop Installations; Safe Refrigerant Handling - Daikin RR20AVAK9 Installation & Service Reference

Installation Clearances

Special consideration must be given to location of the condensing unit(s)
in regard to structures, obstructions, other units, and any/all other
factors that may interfere with air circulation. Where possible, the top
of the unit should be completely unobstructed; however, if vertical
conditions require placement beneath an obstruction there should be
a minimum of 1.52 meters (60 inches) between the top of the unit
and the obstruction(s). The specified dimensions meet requirements
for air circulation only. Consult all appropriate regulatory codes prior
to determining final clearances.
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 struc-
ture maintains minimum service clearance. Corner installations are
strongly discouraged.
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 foun-
dation slab should not be in contact with or be an integral part of the
building foundation. Ensure the foundation is sufficient to support the
unit. A concrete slab raised above ground level provides a suitable base.
Minimum Airflow Clearance
Model Type
254 mm
Residential
305 mm
Light Commercial

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 absorbing pads or springs can be installed between the condensing unit
legs or frame and the roof mounting assembly to reduce noise vibration.

Safe Refrigerant Handling

While these items will not cover every conceivable situation, they should serve as a useful guide.
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 2758 K a
(400 PSIG.).
When in doubt, do not use cylinder.
A B C
254 mm 457 mm
10" 10" 18"
305 mm 457 mm
12" 12" 18"
AA
508 mm
20"
609 mm
To avoid possible injury, explosion or death, practice safe
24"
handling of refrigerants.
P
4
Figure 3A