Step 5 - Condensate Drains - Carrier 40MBAB Installation Instructions Manual

40MBAB: Installation Instructions
DUCTWORK ACOUSTICAL TREATMENT
Metal duct systems that do not have a 90 degree elbow and 10ft (3m) of
main duct to first branch takeoff may require internal acoustical
insulation lining. As an alternative, fibrous ductwork may be used if
constructed and installed in accordance with the latest edition of the
SMACNA construction standard on fibrous glass ducts. Both acoustical
lining and fibrous ductwork shall comply with the National Fire
Protection Association as tested by UL Standard 181 for Class 1 air ducts.
The air supply and return may be handled in one of several ways;
whichever situation is best suited for the installation (See Fig. 5 — on
page 3). A large number of issues encountered with split-system
installations can be linked to improperly designed or installed duct
systems. It is therefore very important that the duct system be properly
designed and installed.
Use of flexible duct collars is recommended to minimize the transmission
of vibration/noise into the conditioned space. Where the return air duct is
short, or where sound is liable to be a problem, sound absorbing glass
fiber should be used inside the duct.
Insulation of duct work must be installed according to local codes and
best practices. The supply air duct should be properly sized by use of a
transition to match unit opening.
This unit is not designed for non-ducted (free blow) applications.
NOTE: Duct work should be fabricated and installed in accordance
with local and/or national codes.
RECOMMENDED FLEXIBLE
DUCT COLLAR
The outlet side pipe length is 59"/1.5mm
Fig. 29 — Flexible Duct Collar Connection

Step 5 - Condensate Drains

The drainpipe is used to drain water away from the unit. Improper
installation may cause unit and property damage.
CAUTION
• Insulate suction line to prevent condensation, which could lead
to water damage. Check the local codes.
• If the drainpipe is bent or installed incorrectly, water may leak
and cause a water-level switch malfunction.
• In HEAT mode, the outdoor unit may discharge water. Ensure
that the outdoor drain will not contribute to damage and
slippage.
• DO NOT pull the drainpipe forcefully. This could disconnect it.
NOTE: Installation requires adapting the locally sourced drain line
to a "3/4" NPT female pipe thread connection.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
INDOOR DRAINPIPE INSTALLATION
1. Cover the drainpipe with insulation, as required, to prevent
condensation and leakage. These units operate with a positive
pressure at the drain connection and a drain trap is required. The trap
needs to be installed as close to the unit as possible. Ensure the top
of the trap is below the connection to the drain pan to allow complete
drainage of the pan.
MINIMUM CLEARANCE
1"/25.4mm all sides
A220799
NOTE: Horizontal runs must also have a drain trap installed ahead
NOTE: When using an extended drainpipe, tighten the indoor
2. Hand tighten the plug(s) for drain holes that are unused,
11
Fig. 30 —Vertical Discharge
>2"(50mm)
>2"(50mm)
>2"(50mm)
Fig. 31 — Vertical Discharge
of the horizontal run to eliminate air trapping.
connection with an additional protection tube to prevent it
from pulling loose.
A220800
Pitch Drain
1/8" per foot
A220801