MBR Technical Manual

PRODUCT DESIGN
3
The MBR Blower Cabinets are used in combination with a
cased evaporator coil. This combination of blower and coil
functions as the indoor part of a split air-conditioning sys-
tem, and may be matched with a remote condensing or heat
pump unit. The blower cabinet can also function as an elec-
tric furnace when used with an electric heater.
NOTE: The electric heating elements for electric furnace
installation are not shipped with the cabinet and are field-
installed.
Systems should be properly sized by heat gain and loss
calculations made according to methods of the Air Condi-
tioning Contractors Association (ACCA) or equivalent. It is
the contractor’s responsibility to ensure the system has ad-
equate capacity to heat or cool the conditioned space.
CLEARANCES AND ACCESSIBILITY
The unit can be positioned for upflow, counterflow, horizontal
right or horizontal left operation. Zero clearance is allowed
on all sides for combustible materials. Thirty-six inches should
be allotted on the door side for maintenance and service.
To reduce risk of rusting, do not install the unit blower di-
rectly on the ground or on a floor that is likely to be wet. In
such environments, the unit must be elevated by use of a
sturdy, nonporous material.
INSULATION
To ensure efficient operation, review the following precautions.
• If the unit is located in an area with high ambient tem-
perature and/or high humidity, the air handler may be
subject to nuisance sweating of the casing. On these
installations, a wrap of 2” fiberglass insulation with a
vapor barrier is recommended.
• The factory recommends insulating the duct running
through any unconditioned spaces.
To reduce operating sound and vibration transmission use
flexible canvas duct connections at the cabinet.
The United States Environmental Protection Agency (“EPA”) has issued various regulations re-
garding the introduction and disposal of refrigerants introduced into this unit. Failure to follow
these regulations may harm the environment and can lead to the imposition of substantial fines.
These regulations may vary by jurisdiction. Should questions arise, contact your local EPA office.
WARNING
WARNING
Do not connect or use any device
that is not design certified by the
manufacturer for use with this unit.
Serious property damage, personal injury, reduced unit
performance and/or hazardous conditions may result
from the use of such non-approved devices.
WARNING
WARNING
To prevent the risk of property
damage, personal injury, or death,
do not store combustible materials or use gasoline or
other flammable liquids or vapors in the vicinity of this
appliance.
WARNING
WARNING