Air Ducts - Carrier 58MEC Installation, Start-Up, And Operating Instructions Manual

CAUTION
!
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
The entire length of furnace MUST be supported when
furnace is used in a horizontal position to ensure proper
draining. When suspended, bottom brace supports sides and
center blower shelf. When unit is supported from the ground,
blocks or pad should support sides and center blower
shelf area.
Step 4 - - Air Ducts
GENERAL REQUIREMENTS
The duct system should be designed and sized according to
accepted national standards such as those published by: Air
Conditioning Contractors Association (ACCA), Sheet Metal and
Air Conditioning Contractors National Association (SMACNA)
or American Society of Heating, Refrigerating and Air
Conditioning Engineers (ASHRAE), or consult The Air Systems
Design Guidelines reference tables available from your local
distributor. The duct system should be sized to handle the
required system design CFM at the design static pressure.
A
PLENUM
OPENING
B
OPENING
C
Fig. 21 - - Floor and Plenum Opening Dimensions
D
FLOOR
A96283
(OR COIL CASING
Fig. 22 - - Furnace, Plenum, and Subbase
Installed on a Combustible Floor
FACTORY SUPPLIED
CASED COIL OR COIL BOX
Fig. 23 - - Furnace, Plenum, and Coil Assembly or Coil Box
Installed on a Combustible Floor
PERFORATED
DISCHARGE DUCT
FLANGE
Fig. 24 - - Duct Flanges
22
FURNACE
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
FURNACE
COMBUSTIBLE
FLOORING
SHEET METAL
PLENUM
FLOOR
OPENING
210 DEG.
MIN
A96285
A07586
NO
YES
YES
A93029