Daikin Rebel Applied DPSA, Installation And Start-Up Manual

Page: 21 / 162

Installation
www.DaikinApplied.com 21 IM 1287-4 • REBEL APPLIED ROOFTOP
Figure 26: Service Clearances (Scenario B)
Ventilation Clearance
Figure 27 denotes minimum ventilation clearance
recommendations. The system designer must consider each
application and provide adequate ventilation. If this is not done,
the unit will not perform properly.
Unit(s) surrounded by a screen or a fence:
1. The bottom of the screen or fence should be at least 1 ft.
(305 mm) above the roof surface.
2. The distance between the unit and a screen or fence
should be as described in Figure 25 .
3. The distance between any two units within a screen or
fence should be at least 120ʺ (3048 mm).
Unit(s) surrounded by solid walls:
1. If there are walls on one or two adjacent sides of the unit,
the walls may be any height. If there are walls on more
than two adjacent sides of the unit, the walls should not
be higher than the unit.
2. The distance between the unit and the wall should be at
least 96ʺ (2438 mm) on all sides of the unit.
3. The distance between any two units within the walls
should be at least 120ʺ (3048 mm).
Do not locate outside air intakes near exhaust vents or other
sources of contaminated air.
If the unit is installed where windy conditions are common,
install wind screens around the unit, maintaining the
clearances specified ( Figure 25 ). This is particularly important
to prevent blowing snow from entering outside air intake and
to maintain adequate head pressure control when mechanical
cooling is required at low outdoor air temperatures.
For pad-mounted units, it is recommended that the condenser
section be lifted a minimum of 12ʺ off the ground for proper
underside ventilation. This clearance allows for proper airflow,
optimal condenser performance and to prevent any minor
reductions in performance.
48”
48”
48”
72”
To roof
access
location
Recommended
roof walkway
96”
Return
Section
Filter section
Supply Fan Section
Heat Section
Condenser Section