First Co UC User Manual
UC/UCX SERIES FAN COIL UNIT
****** WARNING ******
Extreme caution must be
taken that no internal damage
will result if screws or holes
are drilled into the cabinet.
****** 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 filter in place.
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 war-
ranty 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.firstco.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 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 filed 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 upflow 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 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 figure 1. This application requires the optional louvered wall
panel which must be ordered from First
Co. Wall panel with frame is secured to
the studs by screws or nails after the dry
wall has been installed. Refer to figure 2
and 3.
Closet Platform Front Return
Fan coil is to be set on a platform and
secured by screws or nails. Sufficient
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
fan coil cabinet, discharge plenum and
connecting ducts. Sufficient 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.
AIR DISTRIBUTION
DUCTS
All duct work must be installed in accor-
dance 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
filtered 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 confirmed by a local professional. The manufacturer will not be
responsible for misapplied equipment.
L2441 3/11
****** WARNING ******
On 1.5 and 2 ton units do not
use the blower low(red wire)
speed tap with electric resistance heating. This could
cause overheating and a possible fire situation. High and
medium speeds keep hot spots
from forming. Follow supplied
wiring diagram strictly. Failure to do so will void all warranties.
Does not apply to brushless DC
motors if so equipped. Follow
wiring diagram supplied.
ELECTRICAL
****** WARNING ******
Do not touch any rotating
component with any object.
Damage to the equipment
and personal injury can
occur.
****** 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 refrigerant leak when pressure is
applied to the system.
All wiring must comply with local and
national code requirements. Units are
provided with wiring diagrams and
nameplate data to provide information
required for necessary field wiring. Refer
to figure 2 for points of entry of the wiring
into the cabinet.
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.
• Always review the nameplate on each
unit for proper voltage and control configurations. 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 fire extinguisher readily available. When soldering close to expansion devices or other
components, heat shields or wet rags
are required to prevent damage.
• When the fan coil unit is in operation
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 overflow
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 filter media installation to en-
sure that it is installed correctly. Use the
directional arrows or other information on
the filter to determine the proper flow
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.
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.
INSTALLATION
PRECAUTIONS
Installation of this fan coil should only
be performed by licensed personnel 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
attempted without first 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.
UC RECESSED WALL MOUNTING
CROSS MEMBER - TOP & BOTTOM
ATTACH UNIT TO FRAME USING
6 SCREWS / NAILS IN CABINET AT
LOCATIONS SHOWN
VERTICAL
2 X 4
BRACKET PLACEMENT
FOR HANGING
IN A CLOSET
UNIT FLUSH WITH
WALL STUDS
(NOT CRITICAL)
LEAVE SUFFICIENT
SPACE FOR DRAIN
PIPING
10" TO 12" MINIMUM
RECOMMENDED
SUPPORT FRAMING
Figure 1
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