24/36/48/60 SHW / SVW
BLOWER 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 blower 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.
BLOWER COIL UNIT
The installer must adhere strictly
to all local and national code requirements pertaining to the installation of this equipment.
The SHW blower coil units are
designed to be installed in a horizontal position with discharge air in a
horizontal direction. The SVW
blower coil units are designed for
installation in a vertical position with
discharge air in a vertical direction.
Both unit models incorporate a positive slope drain pan with a 3/4" NPT
nipple that exits the unit on the side
of the coil header connections. All
units need to be leveled in such a
way to insure positive slope toward
the condensate drain nipple.
NOTICE: Before mounting unit
remove red headed shipping
bolts and metal bushing at
blower base and blower outlet. In
addition remove, if present, the
wire tie securing motor to blower
rail before operating.
Sufficient clearance must be provided on the side of the blower coil to
allow access to electrical controls
and to service the motor blower assembly.
Standard unit configuration is right
hand looking with the direction of
airflow. The unit can be field converted to left hand by repositioning
the coil, drain pan and remounting
the motor and pulleys.
NOTE: Motor rotation must be reversed. See motor nameplate for
details.
AIR DISTRIBUTION
DUCTS
All duct work must be installed in
accordance with National Fire Pro-
tection 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. In many cases it is acceptable to use ducting of the same size
as the blower coil return air connection. 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. A 4 x 4 electrical
box is provided on the cabinet for
connection of power supply.
****** 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.
L45321 3/02
These blower coil units can be
provided with a optional Class 2
relay/transformer for 24-volt control
circuits (3/4 HP maximum load rating). 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.
PIPING
These units employ a hydronic coil
designed for use with either hot or
chilled water. Each coil has a 1/4
inch bleed line.
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. All chilled water
piping must be insulated to prevent
condensation.
****** WARNING ******
When connecting piping or
valve kits to blower 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.
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
blower coil all external piping must
be purged of debris.
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.
NOTE: Drain pan has positive slope
to the nipple which is located on the
coil connection side of the unit.
GENERAL PIPING
PRECAUTIONS
1. Flush all field piping prior to
connection to remove all debris.
2. Use wet cotton rags to cool valve
bodies, if present, 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 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 coil header or valve package
will not support the weight of the
connecting pipes. All pipes which
are connected to the unit 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 may result.
10. All piping fabricated 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 connections 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.
STANDARD UNIT
L
N
GRD
BLK
BLK
120V-1PH-60HZ
FAN
MOTOR
SUPPLY
JUNCTION
FIELD WIRING
FACTORY WIRING
BOX
WIRING DIAGRAMS
OPTIONAL RELAY / TRANSFORMER
N
GRD
BLK
(FIELD INSTALLED)
L
BLK
120V-1PH-60HZ
SUPPLY
BLK
120V 24V
WHT
BLK
RED
RELAY / TRANSFORMER
3/4 HP Max. Load Rating
BLOWER
MOTOR
JUNCTION
BOX
FIELD WIRING
FACTORY WIRING
R
W
Y
C
G
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 capture all
condensation or insulate the 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 blower coil units are designed for quiet operation, however,
all air handling 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
blower coil unit is securely mounted
and the structure is sufficient to support the weight of the equipment.
Two (2) mounting rails are supplied
on the blower coil unit. All anchors
for mounting the equipment must be
placed and sized to ensure a safe
and durable installation. When necessary 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 blower 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
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 blower coil unit is in
operation components are rotating
at high speeds.
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 auxiliary overflow pan 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. This
could cause the motor to activate its
internal motor temperature protector and shut off on safety.
****** 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.
START-UP OPERATION
Pre-start Check
1. Check that supply voltage
matches nameplate data.
2. Ensure that the unit is properly
grounded.
3. With power off, 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.
HANGING ROD MOUNTING DIMENSIONS
MODEL A B
(TOP VIEW)
AIR FLOW
24SH 35 29
36SH 35 38-1/2
48SH 37 40
60SH 40 47
****** WARNING ******
Always wear eye protection.
When blower 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.
Blower Speed Adjustment
Adjustment of blower speed is
made by loosening the set screw in
the outer (movable) pulley face and
turning this face half or full turns
only, so that the adjusting set screw
will be positioned precisely over the
flat on the pulley hub. Speed is
reduced by adjusting the pulley
faces so that they are further apart;
speed is increased with faces closer
together. Check all of the pulleys'
set screws for tightness.
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.
MAINTENANCE
To achieve maximum performance and service life of each
piece of equipment a formal schedule of regular maintenance should
be established and maintained by a
certified contractor.
The following is provided as a rec-
ommended maintenance schedule.
Specific instructions for maintenance proce
check list.
dures are given after the
****** WARNING ******
Disconnect electrical power and
allow all rotating equipment to
stop before servicing the unit.
Failure to do so may result in
personal injury or death from
electrical shock or entanglement in moving parts.
Monthly Check List
- Inspect the unit air filters. Clean or
replace as required.
- Inspect the drainpan to be sure it is
clean to permit the flow of condensate through the drain lines.
- Inspect the fan belt for wear and
alignment. Replace or adjust as
required.
Yearly Check List
- Clean the blower motor and oil if
required.
- Inspect the blower coil unit casing
for corrosion and loose fasteners.
- Inspect the blower wheel and
housing. Clean if necessary.
- Check the motor pulley and
blower pulley for alignment and
tighten their set screws. Adjust
belt tension if necessary.
- Inspect all coil connections for
leaks. Inspect the coil fins for
excessive dirt or damage. Clean
or repair if required.
Pulley Alignment and
Belt Tension
Belt tension and pulley alignment
should be checked. Belt tension is
adjusted by means of the motor tailpiece adjusting bolt or the position of
the motor on the base style motor
mount. A deflection of about 3/4" to
1" per foot of span should be obtained by pressing the belt firmly.
The adjusting bolt should be locked
in position after the adjustment is
made. Alignment of pulley grooves
is made by locating the motor pulley
on the motor shaft or by moving the
entire motor along the motor mounting bracket. For blower speed adjustment refer to that section.
3/4" to 1" PER
FOOT OF SPAN
Blower
Inspect the bearings for wear. They are
ball bearing, self-aligning and grease
packed. Replace if required. Inspect the
thrust collars for end play and alignment
of wheel. Check the blades for accumulations of dirt and clean
imbalance and vibration.
mounting brackets, base bolts and isolation material.
in order to avoid
Check
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
compressed air.
2. Flushing or rinsing with water (a
detergent is advisable for greasy
surfaces).
3. If strainers are installed in the
valve packages, clean the strainers
once a year per manufactures directions.
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.
To clean permanent filters, remove
the filter and wash in water to remove the old filter oil. Rinse in
clean, hot water and allow to dry.
Recoat both sides of the filter with
RP filter coat, or an equivalent. Allow to drain and dry thoroughly before reinstalling the filter.
Drain Piping
The drain should always be connected or piped to an acceptable
disposal point sloped away from the
unit. Check the drain line for restrictions or blockage before summer
operation and monthly during the
cooling season.
Drain Pan
The drain pan should be clean to
allow proper condensate flow. Remove any accumulation of residue
from the drain pan and inspect for
rust and leaks.
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