Step 2 - Mount Unit; Step 3- Mount Positions - Carrier 40MBAB Installation Instructions Manual

40MBAB: Installation Instructions

Step 2 - Mount Unit

The unit can stand or lie on the floor, or hang from a ceiling or a wall.
Allow space for wiring, piping, and servicing the unit.
IMPORTANT: When the unit is installed over a finished ceiling and/
or living area, building codes may require a field-supplied secondary
condensate pan to be installed under the entire unit.
Some localities may allow as an alternative, the running of a separate,
secondary condensate line. Consult the local codes for additional
restrictions or precautions.
NOTE: Nuisance sweating may occur if the unit is installed in a high
humidity environment with low airflow.
Horizontal installations
Fig. 8 — Horizontal Installations

Step 3- Mount Positions

Fig. 9 — Vertical Installations
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
MORE REQUIREMENTS:
Air supply and return may be handled in one of several ways best
suited to the installation. The vast majority of problems encountered
with combination cooling systems can be linked to improperly
designed or installed duct systems.
It is therefore highly important to the success of an installation that
the duct system be properly designed and installed. Use flexible duct
collars to minimize the transmission of vibration/noise into the
conditioned space. Where return air duct is short, or where sound
could potentially to be a problem, sound absorbing liner should be
used inside the duct.
Duct must be insulated where it runs through an unconditioned space
during the cooling season.
The use of a vapor barrier is recommended to prevent absorption of
moisture from the surrounding air into the insulation.
The supply air duct connection should be properly sized by use of a
transition to match unit opening.
All ducts should be suspended using flexible hangers and never
fastened directly to the structure.
This unit is not designed for non-ducted (freeblow) applications.
Duct work should be fabricated and installed in accordance with
local and/or national codes.
CAUTION
A field-fabricated secondary drain pan, with a drain pipe to the
outside of the building, is required in all installations over a
finished living space or in any area that may be damaged by
overflow from the main drain pan. In some localities, local codes
may require a secondary drain pan for any horizontal installation.
INSTALLATION DIRECTION SELECTION
The units can be installed in a vertical (down and up) and Horizontal
(right and left) configuration.
Vertical
Fig. 10 — Vertical or Horizontal Installation
NOTE: For horizontal installation a secondary drain pan (field
supplied) must be installed.
6
At least
18in(46cm)
Horizontal