HBC, PHBC, RHBC and CHBC
HORIZONTAL HYDRONIC FAN COIL UNITS
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.
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.
****** WARNING ******
Unit must not be operated during building construction due
to excessive airborne dust and
debris. The units must not be
operated under any circumstances without an air filter in
place.
FAN COIL UNIT
The installer must adhere strictly to
all local and national code requirements pertaining to the installation of
this equipment. The HBC, PHBC, and
RHBC units are designed for installa-
tion in a horizontal position above a
dropped ceiling. The CHBC is a cabinet unit intended for horizontal exposed surface mounting.
In a HBC free return installation
(non-ducted return air), the furred
down area must be completely sealed
(except return air grille) to ensure that
all return air is pulled from the conditioned space and not from other areas
of the building structure.
Access must be provided for servicing the unit. If this access is provided
by a removable ceiling panel, ample
space must be allowed for removal of
the blower panel and to provide access to electrical and plumbing controls.
While most fan coil units are U.L.
Listed for installations with zero clearance to combustible materials, reference should be made to the marking
on the particular unit being installed
where specific information regarding
clearances is provided.
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. 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.
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.
These units may be provided with a
optional Class 2 transformer for 24volt control circuits. Should any addon 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.
****** 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.
L2395 9/99
Supply Connection
Return Connection
A
Left Hand Arrangement
A
Figure 1 - Determination of Right-hand/Left-hand References
PIPING
These units employ a hydronic coil
designed for use with either hot or
chilled water.
All piping must be adequately sized
to meet the design water flow requirements as specified for the specific
installation. Piping must be installed
in accordance with all applicable
codes.
The piping connections on the
equipment are not necessarily indicative of the proper supply and return
line sizes. To minimize restrictions
piping design should be kept as
simple as possible.
Caution: Prior to connecting to the
fan coil all external piping must be
purged of debris.
****** WARNING ******
When connecting piping or
valve kits 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.
Plenum
(Optional)
All chilled water piping must be insulated to prevent condensation.
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.
RHBC and CHBC fan coil units require a minimum trap of 1-1/2 inches
be provided in the drain line to assure
proper drainage. HBC and PHBC fan
coil units may be located where the
return air space is large enough that a
negative pressure is not present,
however, a trapped condensate line
is recommended in case a negative
condition should occur, the unit would
drain properly.
PIPING PRECAUTIONS
1. Flush all field piping prior to connection to remove all debris.
2. Use wet cotton rags to cool valve
bodies when soldering.
3. Open all valves (mid-way for hand
valves, manually open on motorized
valves) prior to soldering.
4. When soldering to bronze or brass,
heat the piping while in the socket/cup
and begin introducing the solder
when the flux boils rapidly.
Avoid direct flame into the solder joint.
5. Heat can only be applied to the cup
B
A
Right Hand Arrangement
of the valve body for a minimal time
before damage occurs (even with the
use of wet rags.
6. Avoid rapid quenching of solder
joints as this will produce joints of
inferior quality.
7. The valve package will not support
the weight of the connecting pipes. All
pipes which are connected to the
units must be completely supported
prior to connection to the unit.
8. Provisions must be made for expansion and contraction of piping systems. All horizontal and vertical risers, including runouts, must be able to
withstand significant movement with
temperature changes. Failure to do
so will result in damage and failure of
piping, fittings and valves throughout
the building.
9. Never insulate the heads or motorized portion of control valves. Damage can occur in the form of excessive heat build up and interference to
the operation and moving parts will
result.
10. All piping made in the field should
be installed with consideration of additional space for any electrical routing that may be required.
11. Connect all piping per accepted
industry standards and observe all
regulations governing installation of
piping systems. When all connec-
tions are complete the system must
be pressure tested. Repair any solder
joint leaks and gently tighten any leaking valve packing nuts and piping accessories as required. Hydronic systems are not designed to hold pressurized air and should only be tested
with water.
PIPING INSULATION
After the system has been proven
leak free, all lines and valve control
packages must be insulated to prevent condensate drippage or insulated as specified on the building
plans.
Note: Many valve packages will not
physically allow all components to fit
over an auxiliary drain pan. It is the
installers responsibility to insulate all
piping to ensure adequate condensation prevention.
DUCT WORK
All duct work must be installed in
accordance with industry accepted
practices, and all applicable national
and local code requirements.
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.
MOUNTING
It is important to ensure that the fan
coils are 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.
These units are provided with six
(6) mounting holes. Metal washers
and nuts of the proper size are to be
provided by the installer. When nec-
essary use shims to obtain the proper
level. This will ensure that the condensate will drain from the unit.
INSTALLATION
PRECAUTIONS
Installation of this equipment
should only be performed by properly
trained personnel to ensure proper
installation and the safety of the installer. The following are some precautions to be followed for typical installations.
1. Always use proper tools and equipment.
2. 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.
3. Always review the nameplate on
each unit for proper voltage and control configurations. This information
is determined from the components
Figure 2 - Installation of Valve Cluster Assemblies
2-Way Motorized Valve Assemblies
1. The motorized valve assembly should be attached to
the supply header which is the connection nearest the air
outlet flange on the unit.
2. Prior to soldering the joints, operate all the hand valves
to ensure that the handles will fully open and close without
interference to other valves, ceiling, wall, plenum or other
accessories.
3. All valves will operate at any angle with the exception
of the motorized valve, which must never be installed with
the power head below horizontal. The actuator box
requires a 3/4" clearance for removal.
3-Way Motorized Valve Assembly
1. The 3-way valve assemblies will mount to the coil in
only one position. On four-pipe right hand systems a "B"
valve assembly is required for the chilled water connection and a "A" valve assembly is required for the hot water
connection. On left hand systems a "A" valve assembly is
required for the chilled water connection and the hot water
connection. (See figure1.)
2. Prior to soldering the joints, operate all the hand valves
to ensure that the handles will fully open and close without
interference to other valves, ceiling, wall, plenum or other
accessories.
3. All valves will operate at any angle with the exception
of the motorized valve, which must never be installed with
the power head below horizontal. The actuator box
requires a 3/4" clearance for removal.
and wiring of the unit and may vary
from unit to unit.
4. When soldering or brazing to the
unit it is recommended to have a fire
extinguisher readily available. When
soldering close to valve packages or
other components heat shields or wet
rags are required to prevent damage.
5. When the fan coil unit is in operation components are rotating at high
speeds.
****** WARNING ******
Do not touch any rotating
component with any object.
Damage to the equipment and
personal injury can occur.
6. Units must be installed level to
ensure proper drainage and operation.
7. Check unit prior to operation to
ensure that the condensate water will
drain toward the drain connection. An
overflow drain may be required as a
back up to a clogged primary drain.
8. Be sure that the drain pan is free
from foreign material prior to start up.
9. 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.
10. Ensure that the air distribution
system does not exceed the external
static rating of the unit.
OPERATION AND
MAINTENANCE
Pre-start Check
1. Check that supply voltage matches
nameplate data.
2. Ensure that the unit is properly
grounded.
3. With power off, check blower
wheel set screws for tightness and
ensure that the blower wheel(s) rotate
freely and quietly.
4. Check that coil(s), valves and piping have been leak checked and insulated as required.
5. Ensure that all air has been vented
from the system.
6. Install all panels.
7. Install any filters which may have
been removed during the installation
process.
****** WARNING ******
Always wear eye protection.
When fan coil is operating,
some components are operating
at high speeds. Personal injury
can result from touching these
items with any object
All electrical and service
access panels must be returned
and secured in their proper place.
Clear surrounding area of all
tools, equipment and debris.
Check the entire unit to ensure
it's cleanliness.
Inspection and Cleaning
Before start-up all of the components 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.
****** WARNING ******
The manufacturer does NOT
WARRANT equipment subjected to abuse. Metal chips,
dust, drywall tape, paint over
spray, etc. can void warranties
and liability for equipment failure, personal injury and property damage.
Fan
The fan should be inspected and
cleaned, in conjunction with maintenance of the motor and bearings. It is
important to keep the wheel 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 and if it has oiling
ports, it should be oiled with a good
grade of SAE 20 oil. Normally a few
drops of oil in each bearing is sufficient.
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.
1. Cleaning with low pressure com-
pressed air.
2. Flushing or rinsing with water (a
detergent is advisable for greasy surfaces).
3. Prior to the water system start-up
and balancing, the chilled/hot water
systems should be flushed to clean
out dirt and debris which may have
accumulated during construction. All
unit service valves are to closed during this process. Strainers are to be
installed in the piping mains to prevent
this material from entering the units
during normal operation.
Caution: Be sure to return valves to
their proper operating positions prior
to start-up.
Filter
The air filter should be cleaned or
replaced as often as necessary to
prevent restriction of air flow. Always
replace the filter with the same type as
originally furnished.
Drain Piping
The drain should always be:
-Connected or piped to an acceptable disposal point sloped away
from the unit at least 1/8" per foot
-Checked before summer operation
-Periodically checked during summer operation
Note: A trap may be required per local
codes and for odor containment.
Preventative Maintenance
To achieve maximum performance
and service life of each piece of equipment a formal schedule of regular
maintenance should be established
and maintained.
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