Installation guide

sidecasingoftheunitanddonotinterferewithremovalof
thetopoftheunit.
FILTERS
AllreturnairMUSTpassthroughafilterbeforeenteringthe
unit.Anelectronicaircleaner,optionalfilterracks,orother
accessiblefilterarrangementmustbeinstalledinthereturn
airductwork.Minimumrecommendedfiltersizesarelisted
inFIGURE12andarebasedonmaximumfacevelocitiesof
300ft/minfordisposablefiltersand600ft/minforwashable
(highvelocity)filters.Seefigure10forfiltersizes.
REDUCED EQUIPMENT LIFE HAZARD
Failure to follow this caution may result in improper
unit operation,
Do not operate the unit without a filter.
Figure 12 Filter Sizes
Model
PDX424040
PDX430060
PDX436080
PDX442080
PDX448100
PDX460100
Disposable Filters
Minimum
Nominal Size Area(sq.
(qty x w x d) inches)
1 x 20" x 20" 384
1 x 20" x 24" 480
2 x 15" x 20" 576
2 x 18" x 20" 672
2 x 20" x 20" 768
2 x 20" x 24" 960
NomlnaI Size
(w x d)
(inches)
1 x 10" x 20"
1 x 12" x 20"
1 x 15" x 20"
1 x 18" x 20"
1x20"x20"
1x20"x24"
Washable Filters'
Minimum
Area (sq.
inches)
192
240
288
336
384
48O
1 Washable filter size is based on an allowable face velocity of 600 ft/min. Refer to
filter manufacturer's specifications for allowable face velocity and required filter area.
D2J