First Co UC-HW User Manual
UC(S)-HW SERIES FAN COIL UNIT
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
**WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER**
Altering the product or replacing parts with non authorized factory parts voids all warranty or implied warranty
and may result in adverse operational performance and/or a possible hazardous safety condition to service
personnel and occupants. Company employees and/or contractors are not authorized to waive this warning.
Current Maintenance Program is available at www.fi rstco.com under "Product Information".
GENERAL
The manufacturer assumes no responsibility for equipment installed in violation
of any code requirement.
These instructions give information relative to the installation of UC-HW fan coil
units only. For other related equipment
refer to the proper instructions.
Material in this shipment has been
inspected at the factory and released to
the transportation agency in good condition. When received, a visual inspection
of all cartons should be made immediately. Any evidence of rough handling
or apparent damage should be noted
on the delivery receipt and the material
inspected in the presence of the carrier's
representative. If damage is found, a
claim should be fi led against the carrier
immediately.
FAN COIL UNIT
The installer must adhere strictly to all
local and national code requirements
pertaining to the installation of this equipment.
These units are designed to be installed
vertically in the upfl ow position by the
following mounting means:
Hung on closet wall
Using mounting kit 90PK3, air handler
may be wall mounted. Brackets and
screws are provided for both the closet
wall and the air handler.
It is recommended that sound isolating material be installed to prevent any
undesired transfer of sound.
Recessed in a wall
Installation of the fan coil recessed into
a partition wall with it's recommended
framing is shown in fi gure 1. Note: the
front face of the unit must be installed
fl ush with the dry wall. This application
requires the optional louvered wall panel
which must be ordered separately. Wall
panel with frame is secured to the studs
by screws or nails after the dry wall has
been installed. Refer to fi gure 2 and 3.
Closet Platform Front Return
Fan coil is to be set on a platform and
secured by screws or nails. Suffi cient
space for drain piping is required under
the platform.
All fan coil units are U.L. Listed for installation with zero inches clearance to
combustible materials. This includes the
****** WARNING ******
Extreme caution must be
taken that no internal damage
will result if screws or holes
are drilled into the cabinet.
fan coil cabinet, discharge plenum and
connecting ducts. Suffi cient clearance
must be provided at the front of the fan
coil to allow access to electrical controls
and removal of the motor /blower assembly for servicing. This clearance distance
should be approximately the same as the
depth dimension of the fan coil unit.
****** WARNING ******
Unit must not be operated
during building construction
due to excessive airborne
dust and debris. The unit
must not be operated under
any circumstances without
an air fi lter in place.
AIR DISTRIBUTION
DUCTS
All duct work must be installed in ac-
cordance with National Fire Protection
Association Codes 90A and 90B. Ducts
should be adequately insulated to prevent condensation during the cooling
cycle and to minimize heat loss during
the heating cycle. All return air must be
fi ltered to prevent dirt buildup on the coil
surface. If there is no ducted return, applicable installation codes may limit the
unit to installation only in a single story
residence. In many cases it is acceptable
to use ducting of the same size as the
fan coil connections. However, unique
arrangements or long duct runs must be
confi rmed by a local professional. The
manufacturer will not be responsible for
misapplied equipment.
L2465 4/08
ELECTRICAL
All wiring must comply with local and
national code requirements. Units are
provided with wiring diagrams and
plate data to provide information required
for necessary fi eld wiring. Refer to fi gure
2 for points of entry of the wiring into the
cabinet.
name-
****** WARNING ******
Any devices such as fan
switches or thermostats that
have been furnished by the
factory for fi eld installation
must be wired in strict accordance with the wiring diagram
that is supplied with the unit.
Failure to do so could result
in damage to components
and will void all warranties.
These units may be provided with a
Class 2 transformer for 24-volt control
circuits. Should any add-on equipment also have a Class 2 transformer
furnished, care must be taken to prevent interconnecting outputs of the two
transformers by using a thermostat with
isolating contacts.
INSTALLATION
PRECAUTIONS
Installation of this fan coil should only
be performed by a licensed contractor to
ensure proper installation and the safety
of the installer. The following are some
precautions to be followed for typical
installations.
• Always use proper tools and equip-
ment.
• No wiring or other work should be at-
tempted without fi rst ensuring that the fan
coil is completely disconnected from the
power source and locked out. Always
verify that a good ground connection
exists prior to energizing any power
sources.
• Always review the nameplate on each
unit for proper voltage and control confi g-
urations. This information is determined
from the components and wiring of the
unit and may vary from unit to unit.
• When soldering or brazing to the
unit, it is recommended to have a fi re
extinguisher readily available. When
soldering close to valve packages or
other components, heat shields or wet
rags are required to prevent damage.
• When the fan coil unit is in opera-
tion components are rotating at high
speeds.
• Units must be installed level to ensure
proper drainage and operation.
• Check unit prior to operation to ensure
that the condensate water will drain toward the drain connection. An overfl ow
drain or an auxiliary drain pan under the
fan coil may be required as a back up to
a clogged primary drain.
• On units with plastic drain pans DO
NOT tighten more than hand tight.
• Be sure that the drain pan is free from
foreign material prior to start up.
• Check fi lter media installation to en-
sure that it is installed correctly. Use the
directional arrows or other information
on the fi lter to determine the proper fl ow
direction.
NOISE
These fan coil units are designed for
quiet operation, however, all air conditioning equipment will transfer some amount
of noise to the conditioned space. This
should be taken into consideration when
planning the location of the equipment.
UC-HW RECESSED WALL MOUNTING
CROSS MEMBER - TOP & BOTTOM
(PLACE UPPER CROSS MEMBER
3" ABOVE UC UNIT)
ATTACH UNIT TO FRAME USING
6 SCREWS / NAILS IN CABINET AT
LOCATIONS SHOWN
COOLING COIL PIPING
These fan coil units are supplied with
a direct expansion refrigerant coil. The
suction and liquid lines must be sized in
accordance with the outdoor unit manufacturer's recommendations.
****** WARNING ******
When connecting piping to
fan coil units, do not bend or
reposition the coil header tubing for alignment purposes.
This could cause a tubing
fracture resulting in a water
leak when water pressure is
applied to the system.
For front drain applications a tab must
be removed from the inner front edge of
the unit as shown in Fig 5. This operation must be performed after the unit is
installed to prevent damage to the front
of the unit.
For installation of a thermostatic expansion valve see Fig. 6.
****** WARNING ******
Failure to perform modifi ca-
tions for front drain installation may result in structural
and equipment damage.
VERTICAL
2 X 4
BRACKET PLACEMENT FOR
HANGING IN A CLOSET
MOUNT UNIT FLUSH
WITH DRY WALL
(1/2" MIN. IN FRONT
OF WALL STUD)
****** WARNING ******
Do not touch any rotating
component with any object.
Damage to the equipment and
personal injury can occur.
LEAVE SUFFICIENT
SPACE FOR DRAIN
PIPING
10" TO 12" MINIMUM
RECOMMENDED
SUPPORT FRAMING
Figure 1
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