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Daikin DPSA - CABINET CONSTRUCTION; Construction; Air Leakage and Thermal Performance

Daikin DPSA
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CAT 258 • REBEL APPLIED ROOFTOP 8 www.DaikinApplied.com



Rebel Applied rooftop systems introduce rooftop market in
cabinet construction by providing.
Nominal unit cooling capacities from 30 to 52 tons
Pre-painted exterior surfaces that withstand a minimum
1000 hour salt spray test per ASTM B117 to provide
longevity and prevent excessive corrosion
Double-wall foam injected panel construction for all
cabinet walls, access doors, and roof and oor panels
with solid steel liners and a thermal resistance of R-13
All Access doors are mounted with a durable full length
stainless steel piano style hinge
Figure 2: Rebel Applied Door – Exterior View
Figure 3: Rebel Applied Door – Construction


All panels are constructed with an integral thermal break to
eliminate all direct conductive heat transfer paths through the
panel which prevents energy losses and exterior condensation.
Through metal provides a path for heat to enter the cabinet and
lowers the e󰀨ective R-value of the insulation. Figure 2 shows a
foam panel with R-8 insulation and 1% through metal performs
like an R-6 thermally broken panel.
Figure 4: Thermal Break
Rebel Applied o󰀨ers the industry’s rst low leakage packaged
rooftop cabinet and is tested in accordance with ASHRAE
Standard 111 with a rating of Class 6 air leakage at +/- 5"
of static pressure or 0.5% of supply air ow up 5" of static
pressure. Most new applied rooftop equipment operates with
leakage rates >3% at 5" of static pressure; Aging applied
systems leakage can approach leakage rates as high as
5-10% of the supply cfm. Light commercial rooftops typically
operating at lower pressures (3" or less) and see air leakage
rates in excess of 5% in most applications.
Figure 5: Rebel Applied Air Leakage Rates
 These leak rates are based on a 50 ton unit at 350
cfm/ton with economizer and gas heat
With Thermal Break
Without Thermal Break
R6

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