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Air handler installation, Packaging removal, Mounting applications – Reznor B6BM Unit Installation Manual User Manual

Page 6: Upflow installations, Downflow installations

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6

AIR HANDLER INSTALLATION

The B6 Series Air Handler is shipped ready for vertical

upflow installation and is approved for attic, basement,

alcove/closet or crawlspace installation with zero clearance

to combustibles. See

Table 1, (page 4)

for required

installation clearances.

This appliance is approved only

for indoor use.
• The unit must be leveled at installation and attached to

a properly installed duct system.

• The surface that the air handler is mounted on must

provide sound physical support of the unit.

• The air handler must be installed so that all electrical

components are protected from water.

• If a louvered door is installed across the front of this

unit, the appliance must be mounted flush or behind

front edge of finished wall.

• Always reinstall the doors on the air handler after

servicing or cleaning/changing the filters.

Do not operate

the air handler without all doors and covers in place.

Packaging Removal

Remove the shipping crate and User’s Manual from the

equipment. When removing the crate, use extra care so

tubing connections are not damaged. Do not pull on the

coils upper tubes.
Mounting Applications

Vertical only air handlers are factory ready for upflow

applications. These units may be applied in downflow

applications when applied with the appropriate field kit.
Factory ready horizontal air handlers may be applied in

upflow or horizontal-left and -right discharge applications.

These units may also be applied in downflow discharge

when applied with the appropriate field kit as specified in

the units Technical Specifications.
Through-the-floor installations require a 1/4” thick

noncombustible resilient gasket to be used whenever the

supply or return air ducts pass through the floor. The gasket

should be positioned between the duct, unit, and floor.

Upflow Installations

All air handlers are factory shipped, ready for upflow

installation. The horizontal drain pan may be removed

from the air handler when installing the unit in an upflow

configuration. All return air must enter from the bottom of
the unit. A typical upflow unit is shown in

Figure 1

.

Downflow Installations

The downflow accessory kit (See Technical Specifications)

is required for downflow applications. Instructions for

installing the downflow accessory kit are included with the

kit. It is recommended that the accessory be installed prior

to installing the unit. All return air in downflow applications

must enter through the top of the unit. A typical installation
of the unit in a downflow application is shown in

Figure 2

.

Horizontal

Drain Pan

Return

Air

Figure 1. Upflow Installation

Figure 2. Downflow Installation

Tube

Close-off

Plate

Coil

Cabinet

Adaptor Kit

pressure drop in the duct system. Care must be taken

to maintain the proper maximum pressure rise across

the air handler, temperature rise and flow rate. This

may mean increasing the duct size and/or reducing the

blower speed. These treatments must be constructed

and installed in accordance with NFPA and SMACNA

construction standards. Consult with local codes for

special requirements. For best sound performance, be

sure to install all the needed gaskets and grommets

around penetrations into the air handler, such as for

electrical wiring.