First Co CLX-HW (Less Than 30 Tall) - Manual (Page 2)

each unit for proper voltage and con-
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 dam-
age.
• When the fan coil unit is in operation
components are rotating at high
speeds.
• Units must be installed level to
ensure proper drainage and opera-
tion.
• 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 re-
quired 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 sys-
tem 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 recom-
mendations.
Condensate drain lines must be
installed with adequate slope away
from the unit to assure positive drain-
age. 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 recom-
mended that a condensate over-
flow 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 be-
tween 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. Of-
ten after installation of this equipment
additional construction activities oc-
cur. Care must be taken to protect
the equipment from debris during
these construction phases. All ac-
cess panels and filters must be in
place before operation of the units.
Fan
The fan should be inspected and
cleaned, in conjunction with mainte-
nance of the motor and bearings. It is
important to keep the wheels clean in
order to avoid imbalance and vibra-
tion.
Motor
Check motor connections to en-
sure 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 fre-
quently if severe conditions exist.
Always replace the filter with the
same type as originally furnished.
Coil
Any dust or other contaminants
which accumulate on the heat trans-
fer 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 sur-
faces).
****** WARNING ******
When connecting piping to
fan coil units, do not bend or
reposition the coil header tub-
ing for alignment purposes.
This could cause a tubing frac-
ture 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 accor-
dance 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.
Pre-start Check
• Check that supply voltage matches
nameplate data.
• Ensure that the unit is properly
grounded.
• With power off, check blower wheel
****** WARNING ******
R-410a can become combus-
tible if mixed with air at elevated
temperatures and/or pressures.
Property damage, personal in-
jury or death could result if this
warning is ignored.