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6.5 Additional Unit Preparation Considerations
For proper installation the following items must be con-
sidered prior to moving the unit to its installation site:
• Important: When the air handler is located adjacent
to the living area, the system should be carefully
designed with returns which minimize noise trans-
mission through the return air grill. Although the air
handler is designed with large blowers operating at
moderate speeds, any blower moving a high volume
of air will produce audible noise which could be objec-
tionable when the unit is located very close to a living
area. It is often advisable to route the return ducts
under the floor through the attic. Such design permits
the installation of air return remote from the living area
(i.e. central hall).
• Pursuant to Florida Building Code 13-610.2.A.2.1, this
unit meets the criteria for a factory sealed air handler.
• If a side return is needed for your application, the side
return MUST be prepared prior to moving the air han-
dler to its installation location. See the Side Return Kit
# BAYSRKIT100A Installer Guide for detailed instruc-
tions.
• Study the unit’s outline drawing and dimensions prior
to selecting the installation site. Note in advance
which electrical conduit entry points and condensate
drain holes are to be used, so that proper clearance
allowances can be made for installation and future
maintenance.
• Installation of the air handler must be made prior to,
or at the same time as, the installation of the outdoor
unit in order to allow access for refrigerant lines.
• Consider the overall space needed when external
accessories are used, additional height and width
requirements may exist.
• These units are not approved for outdoor installation.
• These units must be installed in the proper air flow
direction.
• Any third-party heater accessories, including
hydronic coils and duct heaters must be downstream
of the unit.
• Note: No atomizing style humidifier is allowed in the
return plenum with the use of this unit.
• Excessive bypass air may cause water blow-off,
which will adversely affect system operation and air
cleaner performance. To verify bypass airflow, fol-
low the Bypass Humidifier Pre-Installation Checkout
and Set-Up Procedures available through your local
distributor. Ask for publication number 18-CH37D1-*
Steam and Flow-through Fan Power Duct-mounted
Humidifiers. Follow the humidifier installation instruc-
tions. These should only be installed on the supply
air side of the system.
• Note: The air handlers have been evaluated in accor-
dance with the Code of Federal Regulations, Chapter
XX, Part 3280 or the equivalent. “SUITABLE FOR
MOBILE HOME USE.”
• Important: The *AM4A0C60S51SA air handler ap-
plied in downflow or horizontal configurations should
not exceed 2000 CFM. Airflow above 2000 CFM
could result in water blow-off. For verification, see
airflow table.
• Note: This unit is certified to UL 1995.
The interior cabinet wall meets the following:
- UL94-5VA Flame Class Listed
- UL723 Steiner Tunnel Listed for 25/50 Flame/
Smoke
- UL746C Listed for Exposure to Ultraviolet Light,
Water Exposure and Immersion
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