Magic Aire DHB Series, Installation, Operation And Maintenance Manual

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010-200021-000 Page 1 DHB IOM 1.5 11-02-2023
DHB SERIES
Magic Aire Fan Coil Unit – Sizes 04 through 10
Installation, Operation and Maintenance Manual
The Magic Aire
®
Fan Coil Unit is
designed for use in any air distribu-
tion system. It is easily adaptable to
most types of existing or new forced-
air heating systems, or it can be in-
stalled in an independent air cooling
system.
GENERAL
Immediately inspect each unit
for damage upon receipt. File any
damage claims with the freight carri-
er. Protect stored units from dam-
age. Do not stack more than two
high.
Use these instructions in conjunction
with other appropriate instructions,
including but not limited to those in-
structions supplied with the outdoor
unit (if applicable). Installation must
comply with all applicable local
codes.
Pay particular attention to the
following words:
NOTE –intended to clarify or
make installation easier.
CAUTION –given to prevent
equipment damage.
WARNING –to alert installer
that personal injury and/or
equipment damage may re-
sult if installation procedure
is not properly followed.
EXISTING DUCT WORK
The previously installed air distribution system
for heating requires close inspection to determine
its suitability for cooling. In general, heating sys-
tems designed for outside temperatures of zero
degrees or lower will need no alteration when used
for cooling. However, in southern sections of the
country, the existing heating duct work may have
to be modified to provide better air distribution and
insulation for cooling.
DUCT INSULATION AND VAPOR PROOFING
Properly installed heating supply ducts should
already have adequate insulation against exces-
sive heat loss. This same insulation should there-
fore be satisfactory in the summer to protect
against heat gain. However, depending on the
specific installation, it may be desirable to add to
the insulation.
All externally insulated duct work must have an
adequate vapor seal for summer operation. This is
particularly important where the duct is exposed to
highly humid conditions in such places as attic,
vented crawl spaces, unconditioned basements,
and utility rooms. The vapor seal prevents conden-
sation of moisture in the insulating material and
subsequent loss of its insulating value.
NOTE : Consult a qualified insulation contractor
to insure your system is properly insulated.
INSTALLATION
1. Remove all packing and foreign material from
unit.
2. Check blower wheel for free rotation.
3. REMOVE 2ea RED SHIPPING SCREWS (See
Figure 1).
4. Check copper lines, coil etc for internal or hid-
den damage. Maintain caps and plugs until
ready for connection to system.
Figure 1
Blower Shipping
Screws