Ductwork - Bosch 15 SEER2 Series Installation Instructions Manual

Installation Instructions

7 Ductwork

Field ductwork must comply with the National Fire Protection Association
NFPA 90A, NFPA 90B and any applicable local ordinance(s).
WARNING: FIRE HAZARD AND CARBON MONOXIDE

Do not, under any circumstances, connect return
ductwork to any other heat producing device such
as fireplace insert, stove, etc. Unauthorized use of
such devices may result in fire, carbon monoxide
poisoning, explosion, personal injury or property.
Sheet metal ductwork run in unconditioned spaces must be insulated and
covered with a vapor barrier. Fibrous ductwork may be used if constructed
and installed in accordance with SMACNA Construction Standard on
Fibrous Glass Ducts. Ductwork must comply with National Fire Protection
Association as tested by U/L Standard 181 for Class I Air Ducts. Check
local codes for requirements on ductwork and insulation.
 Duct system must be designed within the range of external static
pressure the unit is designed to operate against. It is important that the
system airflow be adequate. Make sure supply and return ductwork,
grills, special filters, accessories, etc. are accounted for in total
resistance. See airflow performance tables in Section 5 of this manual.
 Design the duct system in accordance with "ACCA" Manual "D" Design
for Residential Winter and Summer Air Conditioning and Equipment
Selection. Latest editions are available from: "ACCA" Air Conditioning
Contractors of America, 1513 16th Street, N.W., Washington, D.C.
20036. If duct system incorporates flexible air duct, be sure pressure
drop information (straight length plus all turns) shown in "ACCA"
Manual "D" is accounted for in system.
If an elbow is included in the plenum close to the unit, it must
not be smaller than the dimensions of the supply duct fl ange on
the unit.
NOTICE:
 The front flange on the return duct (if connected to the
blower casing) must not be screwed into the area where
the power wiring is located. Drills or sharp screw points
can damage insulation on wires located inside unit.

The unit is provided with flanges on the supply and return air
openings. All ductwork should be secured to the flanges using
proper fasteners for the type of duct used and tape the duct-to
unit joint as required to prevent air leaks.
NOTICE:
 When fastening ductwork to the side duct flanges on
the unit, insert the screws through the duct flanges
only. DO NOT insert the screws through the casing.
Outdoor ductwork must be insulated and waterproofed.
1 8 |
Be sure to note supply and return openings. Refer to Figure 3 for
information concerning supply and return air duct dimensions.
Figure 15 Rooftop Installation - Frame Mounting
Bosch 15 SEER2 Inverter Ducted Packaged Heat Pump - BTC 761701319 A (12.2022)
Return Air
Supply Air
Roof Flashing
Angle Iron Frame