First Co CLX-HW User Manual
CL FAN COIL UNITS
****** W ARNING ******
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.
****** W ARNING ******
Extreme caution must be
taken that no internal damage
will result if screws or holes are
drilled into the cabinet.
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.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 these 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 in a vertical,
upflow position either hung on a wall or
set on a platform within an equipment
closet.
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 the air filter,electrical controls and removal of the motor/blower
assembly for servicing. This clearance distance should be approximately the same as the depth of the
fan coil unit.
The unit should be leveled in such
a way that there is slope toward the
condensate drain nipple to assure
positive drainage.
NOTE: It is important at this point to
consider noise and vibration. If this
installation is in a noise sensitive area
then placement of resilient isolators or
other means of sound deadening may
be necessary.
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 as well.
AIR DISTRIBUTION
DUCTS
All duct work must be installed in
accordance 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. Provision for connecting the return air duct
is located on the side of the unit. The
installer must cut out the center section and bend the 3/4” flanges out. The
backing insulation must also be removed. See illustration p.3. Duct sizing for unique arrangements or long
duct runs must be confirmed by a local
professional . The manufacturer will
not be responsible for misapplied
equipment.
ELECTRICAL
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. Knockouts are provided
on the cabinet for connection of power
supply.
These units are 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 equipment.
• 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.
• Always review the nameplate on
L2399 10/09
each unit for proper voltage and con-
****** 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.
****** WARNING ******
Do not touch any rotating
component with any object.
Damage to the equipment and
personal injury can occur.
****** WARNING ******
Any devices such as fan
switches or thermostats that
have been furnished by the
factory for field 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.
****** W ARNING ******
R-410a can become combustible if mixed with air at elevated
temperatures and/or pressures.
Property damage, personal injury or death could result if this
warning is ignored.
trol 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 metering 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 overflow switch
installed in the fan coil may be required as a back up to a clogged
primary drain.
• Be sure that the drain pan is free
from foreign material prior to start up.
• Check filter media installation to
ensure that it is installed correctly.
Use the directional arrows or other
information on the filter to determine
the proper flow direction.
• Ensure that the air distribution system does not exceed the external
static rating of the unit.
MOUNTING
It is important to ensure that the fan
coil is securely mounted and the
structure is sufficient to support the
weight of the equipment. All anchors
for mounting the equipment must be
placed and sized to ensure a safe and
durable installation.
COOLING COIL PIPING
This fan coil unit is supplied with a
direct expansion refrigerant coil. The
suction and liquid refrigerant lines
must be sized in accordance with the
outdoor unit manufacturer’s recommendations.
Condensate drain lines must be
installed with adequate slope away
from the unit to assure positive drainage. Since the drain pan is located on
the suction side of the blower, a
negative pressure exists at the drain
pan and a minimum trap of 1-1/2
inches must be provided in the drain
line to assure proper drainage.
CAUTION: It is highly recommended that a condensate overflow switch be installed to prevent
damage which may result from an
overflow of the condensate pan.
NOTE: If a Condensate Overflow
Shut-off Switch, that is designed to
be installed in the drain line, is used
in place of a secondary drain line,
then the cut-off switch should be
located in the primary drain line between the fan coil unit and the P-trap.
OPERATION AND
MAINTENANCE
set screws for tightness and ensure
that the blower wheels rotates freely
and quietly.
• Check that the refrigerant coil con-
nections and piping have been leak
checked and insulated as required.
Start-up and Maintenance
Before start-up, all of the compo-
nents should be given a thorough
check. Optimal operation of this
equipment requires cleanliness. Often after installation of this equipment
additional construction activities occur. Care must be taken to protect
the equipment from debris during
these construction phases. All access panels and filters must be in
place before operation of the units.
Fan
The fan should be inspected and
cleaned, in conjunction with maintenance of the motor and bearings. It is
important to keep the wheels clean in
order to avoid imbalance and vibration.
Motor
Check motor connections to ensure that they are secure and made in
accordance with the wiring diagram.
The blower motor should be
cleaned annually.
Filter
The air filter should be cleaned or
replaced every 30 days or more frequently if severe conditions exist.
Always replace the filter with the
same type as originally furnished.
Pre-start Check
• Check that supply voltage matches
nameplate data.
• Ensure that the unit is properly
grounded.
• With power off, check blower wheel
Coil
Any dust or other contaminants
which accumulate on the heat transfer surfaces interferes with the air flow
and impairs heat transfer. The coil
must be kept clean by any of the
following methods.
• Cleaning with low pressure com-
pressed air.
• Flushing or rinsing with water (a
detergent is advisable for greasy surfaces).
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