Carrier 48N User Manual download pdf (Page 26)

Chassis arrangements (48 Series units)

Standard chassis — The standard chassis may be pro-

vided with a bottom or side return air opening. The return

air follows a straight-through path to the supply fan, then

into the heating section and exits through a bottom or left

side supply air outlet. The supply/return configuration may

be mixed, e.g., bottom return with side supply. If the appli-

cation utilizes an accessory roof curb, vertical ductwork is

connected to the curb. When side connections are utilized,

the ductwork is connected to flanges on the unit. These

units are available with optional modulating power exhaust

or return fan in conjunction with an optional economizer.

Standard chassis with optional blank section or

final filters

This arrangement adds a factory-installed blank section or

final filter. Return air enters through a bottom or side

opening and follows a straight-through path to the supply

fan, through the heating section and blank section or final

filters, then exits through the bottom or left side supply air

outlet. The supply/return configuration may be mixed,

e.g., bottom return with side supply. If the application uti-

lizes an accessory roof curb, vertical ductwork is connected

to the curb. When side connections are utilized, the duct-

work is connected to flanges on the unit.

Extended length chassis — The extended length chas-

sis arrangement provides an additional 25-in. of unit length

located between the evaporator coil section and the supply

fan sled. This compartment is used for the Humidi-MiZer

coil or may also be used for field-installation of an auxiliary

coil, e.g., a refrigeration heat reclaim coil.

Chassis arrangements - (50 Series units)

Standard chassis with discharge plenum — This con-

figuration may be provided with a bottom or side return air

opening. The return air follows a straight-through path to

the supply fan. The supply fan is arranged for horizontal

outlet into the discharge plenum area. Supply air exits

from the discharge plenum area downward through the

bottom of the unit or horizontally through the left side out-

let. The supply/return configuration may be mixed, e.g.,

bottom return with side supply. If the application utilizes an

accessory roof curb, vertical ductwork is connected to the

curb. When side connections are utilized, the ductwork is

connected to flanges on the unit. These units are available

STANDARD CHASSIS

VERTICAL SUPPLY/VERTICAL RETURN

a48-8676

STANDARD CHASSIS

VERTICAL SUPPLY/HORIZONTAL RETURN

a48-8677

SIDE SUPPLY OPENING

OPPOSITE SIDE

STANDARD CHASSIS

HORIZONTAL SUPPLY/HORIZONTAL RETURN

A48-8678

SIDE SUPPLY OPENING

OPPOSITE SIDE

STANDARD CHASSIS

HORIZONTAL SUPPLY/VERTICAL RETURN

A48-8679

SIDE SUPPLY OPENING

OPPOSITE SIDE

BLANK SECTION

STANDARD CHASSIS WITH BLANK SECTION OR

FINAL FILTERS

VERTICAL SUPPLY/VERTICAL RETURN

a48-8680

NOTE: Standard Chassis with Blank Section or Final Filters also available in

Vertical Supply/Horizontal Return, Horizontal Supply/Horizontal Return, or

Horizontal Supply/Vertical Return configurations.

SIDE SUPPLY OPENING

OPPOSITE SIDE

COIL

COMPARTMENT

EXTENDED LENGTH CHASSIS

VERTICAL SUPPLY/VERTICAL RETURN

a48-8681

NOTE: Extended Length Chassis also available in Vertical Supply/Horizontal

Return, Horizontal Supply/Horizontal Return, or Horizontal Supply/Vertical

Return configurations.

Options and accessories (cont)

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Carrier 48N User Manual Page 26

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