Part #464696
Vertical Fan Coil
®
Installation, Operation and Maintenance Manual
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the
product described. Protect yourself and others by observing all safety information. Failure to comply with instructions
could result in personal injury and/or property damage! Retain instructions for future reference.
Model VFCD
Model VFCB
General Safety Information
Only qualified personnel should install this unit.
Personnel should have a clear understanding of these
instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards.
Other considerations may be required if high winds
or seismic activity are present. If more information
is needed, contact a licensed professional engineer
before moving forward.
2. The rotation of the wheel is critical. It must be
free to rotate without striking or rubbing any
stationary objects.
3. Motor must be securely and adequately
grounded.
4. Do not spin fan wheel faster than the maximum
cataloged fan rpm. Adjustments to fan speed
significantly affects motor load. If the fan RPM is
changed, the motor current should be checked
to make sure it is not exceeding the motor
nameplate amps.
5. Do not allow the power cable to kink or come
in contact with oil, grease, hot surfaces,
or chemicals. Replace cord immediately if
damaged.
1. Follow all local electrical and safety codes, as
well as the National Electrical Code (NEC), the
National Fire Protection Agency (NFPA), where
applicable. Follow the Canadian Electric Code
(CEC) in Canada.
6. Verify that the power source is compatible with
the equipment.
DANGER
7. Never open blower access doors while the fan is
running.
Always disconnect power before working on or
near a unit. Lock and tag the disconnect switch or
breaker to prevent accidental power up.
CAUTION
When servicing the unit, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.
Model VFCD/VFCB Vertical Fan Coil
1
®
Table of Contents
Unit Layout
Installation
Unit Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Mounting Instructions. . . . . . . . . . . . . . . . . . . . . . 3
Unit Dimensions / Weights. . . . . . . . . . . . . . . . . . 4
Inlet and Outlet Duct Details . . . . . . . . . . . . . . . . 4
Coil Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Filter Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operation
System Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Speed Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting
4
1
6
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Motor Overamps . . . . . . . . . . . . . . . . . . . . . . . . . 10
Insufficient / Too Much Airflow. . . . . . . . . . . . . . 10
Excessive Noise or Vibration . . . . . . . . . . . . . . . 10
Start-Up
3
5
2
Hot Water, Chilled Water and DX Coils . . . . .11-12
Drain Pan / Drain Trap . . . . . . . . . . . . . . . . . . . . 12
Maintenance
Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Drain Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reference
Start-Up Documentation. . . . . . . . . . . . . . . . . . . 14
Maintenance Log . . . . . . . . . . . . . . . . . . . . . . . . 15
Warranty . . . . . . . . . . . . . . . . . . . . . . . . .Backcover
1. Fan Section
2. Coil Section
• Chilled Water
• DX Coils
• Hot Water
• Steam Coils
3. Vertical Inlet Filter with 1/4 turn fasteners
4. Hinged Access Door for blower section
(unit shown with door removed)
5. Coil Access Panels provides right and left access
to coil section.
6. 1-1/4 inch knockout is provided for the
recommended electrical wiring penetration or
disconnect switch.
Mounting Instructions
The VFC should be mounted on a field supplied base
as shown in Figure 1. An optional Greenheck supplied
6 inch extended base may be used when mounting as
shown in Figure 2.
Figure 1
Figure 2
Model VFCD/VFCB Vertical Fan Coil
3
®
Unit Dimensions
Model VFCD
Model VFCB
Vertical Airflow
Option
Outlet Airflow
H
W
H
W
Horizontal
Opposed
Airflow
H
W
Option
A
Filter
Projection
2 or 4 inch
A
Filter
Projection
2 or 4 inch
W
W
Inlet
Airflow
Inlet
H
H
Airflow
B
B
C
C
Outlet
Inlet
Unit Size
A
B
C
VCFD Direct Drive
VCFB Belt Drive
Width
18
Height
22
Width
51⁄2
7
Height
Width
63⁄4
63⁄4
Height
600
800
40
40
44
44
52
52
52
24
24
24
30
34
34
50
24
24
28
28
28
28
32
51⁄2
51⁄2
55⁄8
55⁄8
55⁄8
55⁄8
103⁄8
4
61⁄2
8
18
22
1300
1600
2000
2400
3000
18
22
18
81⁄2
22
22
18
9
9
29
23
26
10
9
29
23
26
327⁄8
101⁄4
123⁄4
10
12
45
22
All dimensions are in inches.
Weights
VFCD
Fan with Drain Pan
VFCB
Fan with Drain Pan
Coil Section
Vertical Filter
Unit Size
Fan
235
240
260
300
350
360
425
Motor Total
Fan
235
240
260
300
350
360
425
Motor Total Row 1 Row 2 Row 4 Row 6 Row 8 2 inch 4 inch
600
800
15
15
15
25
25
35
50
250
255
275
325
375
395
475
60
60
60
60
75
75
75
295
300
320
360
425
435
500
38
38
38
51
58
58
64
51
51
51
70
80
80
90
77
77
106
106
106
152
175
175
198
135
135
135
195
225
225
255
8
8
13
13
13
17
19
19
22
1300
1600
2000
2400
3000
77
8
110
127
127
143
11
12
12
14
All weights shown are in lbs. (pounds). Motor weights may vary depending on enclosure type and horsepower.
Model VFCD/VFCB Vertical Fan Coil
4
®
Coil Dimensions
Hot Water • 1 and 2 Row
Unit Size
600
A
B
C
D
D
20.00
20.00
24.00
24.75
24.75
24.75
28.75
22.50
22.50
27.50
27.25
27.50
27.50
31.25
22.63
22.63
22.63
22.63
25.13
25.13
22.63
0.875
0.875
0.875
0.875
0.875
0.875
1.375
4 in.
800
1300
1600
2000
2400
3000
Outlet
Outlet
Airflow
C
Inlet
Inlet
A
3.75 in.
3.81 in.
2 in.
All dimensions are in inches.
0.75 in.
1.5 in.
1 in.
Drain
Connection
NOTE
B
Fluid enters the coil from the bottom connection
(Inlet) and exits from the top (Outlet).
0.25 vent and drain supplied. Right side connection shown.
Hot Water • 4 Row
Unit Size
600
A
B
C
D
20.00
20.00
24.00
24.75
24.75
24.75
28.75
22.50
22.50
27.50
27.25
27.50
27.50
31.25
22.63
22.63
22.63
22.63
25.13
25.13
22.63
0.875
0.875
0.875
0.875
0.875
0.875
1.375
D
800
3 in.
1300
1600
2000
2400
3000
Outlet
Cap
Outlet
Airflow
C
Cap
All dimensions are in inches.
Inlet
Inlet
2 in.
0.75 in.
NOTE
3.75 in.
1.5 in.
1 in.
3.38 in.
Drain
6.63 in.
B
With airflow from left to right, the fluid enters the coil
from the bottom connection (Inlet) and exits from the
top (Outlet). The other two coil connections should
be capped off (Cap).
Connection
A
0.25 vent and drain supplied. Right side connection shown.
Steam • 1 and 2 Row
Unit Size
600
A
B
C
D
20.00
20.00
24.00
24.75
24.75
24.75
28.75
22.50
22.50
27.50
27.25
27.50
27.50
31.25
13.20
13.20
13.20
13.20
14.44
14.44
13.20
2.0
2.0
2.0
2.0
2.0
2.0
2.5
D
3 in.
800
1300
1600
2000
2400
3000
Airflow
Inlet
Outlet
Inlet
C
All dimensions are in inches.
Outlet
2 in.
0.75 in.
4.38 in.
1.5 in.
1 in.
Drain
Connection
5 in.
NOTE
A
B
Steam enters the coil from the center connection
(Inlet) and exits from the bottom (Outlet).
Right side connection shown.
Model VFCD/VFCB Vertical Fan Coil
5
®
Coil Dimensions - continued
Chilled Water • 4, 6 or 8 Row
F
3 in.
Outlet
NOTE
Cap
Outlet
Inlet
With airflow from left to right, the fluid enters the coil
from the bottom connection (Inlet) and exits from the
top (Outlet). The other two coil connections should
be capped off (Cap).
Airflow
E
Cap
Inlet
2 in.
0.75 in.
A
B
1.5 in.
3.75 in.
1 in.
Drain
Connection
C
D
0.25 vent and drain supplied. Right side connection shown.
A
B
Unit
Size
C
D
E
F
4 Row
3.38
3.38
3.38
3.38
3.38
3.38
3.38
6 Row
3.29
3.29
3.29
3.29
3.29
3.29
3.29
8 Row
3.21
3.21
3.21
3.21
3.21
3.21
3.21
4 Row
6.63
6.63
6.63
6.63
6.63
6.63
6.63
6 Row
8.71
8.71
8.71
8.71
8.71
8.71
8.71
8 Row
10.79
10.79
10.79
10.79
10.79
10.79
10.79
600
800
20.00
20.00
24.00
24.75
24.75
24.75
28.75
22.50
22.50
27.50
27.25
27.50
27.50
31.25
22.63
22.63
22.63
22.63
25.13
25.13
22.63
0.875
0.875
0.875
0.875
0.875
0.875
1.375
1300
1600
2000
2400
3000
All dimensions are in inches.
Direct Expansion (DX) Single Circuit • 4, 6 or 8 Row
(Orifice Code 18/19)
1.125 in.
1.625 in.
3 in.
Cap
Cap
NOTE
With airflow from left to right, the fluid enters the coil
from the center connection (Inlet) and exits from the
bottom (Outlet). The other coil connections should
be capped off (Cap).
Airflow
Inlet
Inlet
E
Outlet
Outlet
2 in.
1.5 in.
0.75 in.
A
B
1 in.
Drain
Connection
3.75 in.
C
D
Right side connection shown.
A
B
Unit
Size
C
D
E
4 Row
6 Row
3.29
3.29
3.29
3.29
3.29
3.29
3.29
8 Row
4 Row
6 Row
6.25
6.25
6.25
6.25
6.25
6.25
6.25
8 Row
7.33
7.33
7.33
7.33
7.33
7.33
7.33
600
800
3.38
3.38
3.38
3.38
3.38
3.38
3.38
3.21
3.21
3.21
3.21
3.21
3.21
3.21
5.66
5.66
5.66
5.66
5.66
5.66
5.66
20.00
20.00
24.00
24.75
24.75
24.75
28.75
22.50
22.50
27.50
27.25
27.50
27.50
31.25
13.19
13.19
13.19
13.19
14.44
14.44
13.19
1300
1600
2000
2400
3000
All dimensions are in inches.
Model VFCD/VFCB Vertical Fan Coil
6
®
Filter Sizes and Quantity
Vertical
Model
Filter Size
(inches)
Face Area
(ft2)
Quantity
VFCD/VFCD-600
VFCD/VDFCB-800
VFCD-VFCB-1300
VFCD/VFCB-1600
VFCD/VFCB-2000
VFCD/VFCB-2400
VFCD/VFCB-3000
20 x 24
20 x 24
20 x 24
24 x 24
16 x 25
16 x 25
24 x 24
1
1
1
1
2
2
2
2.7
2.7
2.7
3.6
4.7
4.7
6.7
All dimensions are in inches.
Model VFCD/VFCB Vertical Fan Coil
7
®
4. Air Volume Check and Measurement
Along with the building balance, the unit’s air volume
(cfm) should be measured and compared with its
rated air volume. This unit is flexible for varying air
volume, but the actual air volume should be known for
making final adjustments. The most accurate way to
measure the air volume is by using the pitot traverse
method in the ductwork away from the blower. Other
methods can be used, but should be proven and
accurate. To adjust the air volume, change the fan rpm
or the system losses. See Troubleshooting section in
this guide.
System Start-Up
For proper unit function and safety, follow everything
in this start-up procedure in the order presented.
This is to be done after the electrical connections are
complete.
PRE-START CHECK LIST
1. Disconnect and lock-out all power switches to
fan.
2. Check all fasteners, set screws and locking
collars on the fan, bearings, drive, motor base
and accessories for tightness.
3. Rotate the fan wheel by hand and assure no
parts are rubbing.
4. Check the V-belt drive for proper alignment and
tension.
5. Measure Motor Voltage, Amperage
and Fan RPM
All access doors must be installed. Measure and
record the input voltage and motor amperage(s).
SPECIAL TOOLS REQUIRED
To measure the fan RPM, the blower door will need to
be removed. Minimize measurement time because the
motor may over amp with the door removed.
• Voltage Meter
• Tachometer
Compare measured amps to the motor nameplate
full load amps and correct if over amping. See the
Troubleshooting section in this guide.
• Amperage Meter
1. Check Voltage
Before starting the unit, compare the supplied voltage
with the unit’s nameplate voltage and the motor
voltage. Units are not provided with thermal overload
protection unless a control center has been ordered
with the unit or the motor has been selected with
thermal overload protection.
2. Check Blower Rotation
If the blower is rotating in the wrong direction, the
unit will move some air, but
ON
will not perform properly. To
AIRFLOW
check the rotation, open the
blower access door and run
the blower momentarily to
determine the rotation.
To reverse the rotation, turn the power off and use the
following procedure:
•
For single phase units, rewire the motor per the
instructions on the motor.
•
For three phase units, interchange any two
power leads. This can be done at the motor
starter.
3. Check for Vibration
Check for unusual noise, vibration or overheating of
bearings. Excessive vibration maybe experienced
during initial start-up. Left unchecked, excessive
vibration can cause a multitude of problems, including
structural and/or component failure. Many conditions
can be discovered by careful observation. If the
problem is wheel unbalance, in-place balancing can
be done providing there is access to the fan wheel.
Generally, fan vibration and noise is transmitted to
other parts of the building by the ductwork. If noise
is an issue, we recommend using heavy canvas
connections on the inlet of the fan. Refer to the
Troubleshooting section of this manual if a problem
develops.
Model VFCD/VFCB Vertical Fan Coil
8
®
Speed Controls
Speed controls may be used on Model VFCD fans
for manual adjustment of the fan’s performance (for
final system balancing) or to control the fan’s output
in confined spaces, such as conference or meeting
rooms. The fan can be adjusted to 60% of design
airflow with a speed control. This reduction in airflow
and fan speed is also accompanied by a reduction in
noise level. Solid state speed controls are available for
a range of applications up to 15 amps. Speed controls
can be used to operate more than one fan if the
combined total amperage of the fans does not exceed
the control rating.
Model 5WSSC - For use with shaded pole and PSC
motors.
• Rated for 115 - 127v, 5 amp
• UL Listed
• Requires a 2x4 handy box
Model 5W240 - For use with shaded pole and PSC
motors.
• Rated for 220 - 240v, 5 amp
• UL Listed
• Requires 2x4 handy box
Model 8WSSC - For use with shaded pole and PSC
motors.
• Rated for 220 - 240v, 8 amp
• UL Listed
• Requires 2x4 handy box
Model 10WSSC - For use with shaded pole and PSC
motors.
• Rated for 115 - 127v, 10 amp
• UL Listed
• Requires 4x4 handy box
SWITCHED FULL VOLTAGE
FULL VOLTAGE
RED
Dotted line indicates
BLACK
for use with 10W
H
switch only.
AUX
DEVICE
WHITE
VARIABLE
VOLTAGE
SPEED CONTROL
120 VAC
FAN
N
Model VFCD/VFCB Vertical Fan Coil
9
®
Troubleshooting
Symptom
Possible Cause
Corrective Action
Blown fuse or open circuit breaker
Broken fan belt
Replace fuse or reset circuit breaker and check amps
Replace
to
Blower fails
operate
Defective motor or capacitor
Motor starter overloaded
Airflow too high
Replace
Reset starter and check amps
Check airflow and adjust drives if needed
Static pressures are higher or lower
than design
If higher, ductwork should be improved
If lower, fan RPMs should be lower
Blower rotation is incorrect
Motor voltage incorrect
Check rotation and correct
Motor overamps
Check motor nameplate and supplied voltage
See specifications and catalog for fan curves to determine
if horsepower is sufficient
Motor horsepower too low
Shorted windings in motor
Replace motor
Mixing box damper not fully open
Adjust damper linkage or replace damper motor
Improve ductwork to eliminate losses using good duct
practices
System static pressure too high
Blower speed too low
Mixing box dampers closed
Dirty or clogged filters
Leaks in ductwork
Check for correct drives and RPMs with catalog data
Open and adjust
Clean or replace
Repair
Insufficient airflow
Elbows, or other obstructions may
restrict fan outlet
Correct or improve ductwork
Belt slippage
Adjust belt tension
Check for correct fan RPM
Install filters
Blower fan speed too high
Filter(s) not in place
Too much airflow
Insufficient static pressure
(airflow resistance)
Induce static pressure into system ductwork
Wheel rubbing on housing
Loose wheel on shaft
Loose motor or blower sheave
Belts too loose
Center wheel
Tighten wheel setscrew
Tighten sheave setscrew
Adjust belt tension after 24 hours of operation
Loosen to maintain 3/8 inch deflection per ft. of span
between sheaves
Belts too tight
Worn belt
Replace
Excessive noise
or vibration
Motor base or blower loose
Worn bearings
Tighten mountings bolts
Replace
Bearing and drive alignment
Motor out of balance
Realign
Replace
Wheel out of balance
Replace or rebalance
Replace or rebalance
Clean wheel and housing
Sheaves eccentric or out-of-balance
Accumulation of material on wheel
Model VFCD/VFCB Vertical Fan Coil
10
®
3. When connecting suction and liquid connections,
make sure the coil is free from all foreign material.
Make sure all joints are tight and free of leakage.
Start-Up of Coil Module
Hot Water, Chilled Water and DX Coils
4. Dual circuits are recommended to be run by
two compressors. One compressor with the
appropriate valves and piping can be used but is
not recommended. Greenheck does not supply
compressor or condensing units, for further
instruction on DX coil installation and operation
contact your compressor and/or condenser
manufacturer.
1. Piping should be in accordance with accepted
industry standards. Pipework should be supported
independently of the coils. Water pipes are copper
with sweat connections. USE WET TOWEL TO
AVOID BURNING COIL CONNECTION GROMMETS.
When installing coupling, do not apply undue
stress to the connection extending through the
unit. Use a back-up pipe wrench to avoid breaking
the weld between coil connection and header.
DXI coils have dual connections and should be used
with two compressors.
2. Connect the water supply to the bottom
connection on the air-leaving side and the water
return to the top connection on the air-entering
side. The extra bottom connection can be used for
an auxiliary manual drain connection, and the extra
top connection may be used for an automatic air
vent or the extra connections can be capped. To
ensure proper venting, an external air vent in the
piping is recommended. Connecting the supply
and/or return in any other manner will result in very
poor performance. CAP UNUSED CONNECTIONS.
WARNING
Standard unit insulation of 1.5 lbs. density has an
insulation R-value of 3.7.
For applications where the unit discharge
temperatures are below 55°F. and the unit is
installed in a warm, humid environment, additional
insulation may need to be applied to the exterior of
the unit to prevent condensation.
3. The air vent at the uppermost point should be
temporarily opened during system start-up to
release all of the air from the coil. To maintain heat
transfer capacity, periodically vent any air in coil.
Vent to to be located behind connections side
access door.
Steam Coils
Application Recommendations
Satisfactory operation and
service life are best
ensured when
coils are installed
with proper piping,
trap and support
arrangement. The
following notes
and drawing are
recommended
4. Water coils are not normally recommended for
use with entering air temperatures below 40°F.
No control system can be depended on to be
100% safe against freeze-up with water coils.
Glycol solutions or brines are the only safe media
for operation of water coils with low entering air
conditions.
for the coil unit
installation and
operation.
WARNING
Continuous water circulation through the coil at all
times is highly recommended.
General
1. Provide separate
Strainer
Float & Thermostat Trap
Gate Valve
supports and
Check Valve
Control Valve
5. Pipe sizes for the system must be selected on the
basis of the head (pressure) available from the
circulation pump. Piping should be in accordance
with accepted industry standards.
Vacuum Breaker
Modulating Two-Position
hangers for the
unit and the
piping.
Steam Coil Piping
2. Be certain that adequate piping flexibility is
provided. Stresses resulting from expansion of
closely coupled piping and coil arrangement can
cause serious damage.
6. For chilled water coils, the condensate drain
pipe should be sized adequately to ensure the
condensate drains properly. See Drain Pan Traps
section and related drawing.
3. Standard steam coils are pitched in the casings
when installed for horizontal airflow. The casing
must be level after the unit is installed for proper
condensate drainage. If condensate is not
removed, the coil will suffer from water hammering
and will have a shortened life. On vertical airflow
applications, the coils must be pitched when
installed.
Direct Expansion (DX) Coils
1. Piping should be in accordance with accepted
industry standards. Pipework should be supported
independently of the coils. Undue stress should not
be applied at the connection to coil headers.
2. The condensate drain pipe should be sized
adequately to ensure the condensate drains
properly. See Drain Pan Traps and related drawing.
Model VFCD/VFCB Vertical Fan Coil
11
®
General - continued
Drain Pan / Drain Trap
4. Do not reduce pipe size at the coil return
connection. Carry return connection size through
the dirt pocket, making the reduction at the branch
leading to the trap.
Drain lines and traps should be run full size from the
drain pan connection. Drain pans should have drain
lines and traps to permit the condensate from the
coils to drain freely. On all units with drain pans, the
trap depth and the distance between the trap outlet
and the drain pan outlet should be twice the static
pressure (P) in the drain pan section under normal
operation to assure the trap remains sealed.
5. It is recommended that vacuum breakers be
installed on all applications to prevent retaining
condensate in the coil. Generally, the vacuum
breaker is to be connected between the coil inlet
and the return main. The vacuum breaker should
be open to the atmosphere and the trap design
should allow venting of large quantities of air.
6. Do not attempt to lift condensate when using
modulating or on-off control.
2P = minimum
7. Do not reduce the pipe size leaving the coil.
Traps
2P = minimum
1. Size traps in accordance with the manufacturer’s
recommendations. Be certain that the required
pressure differential will always be available. DO
NOT UNDERSIZE.
Drain Pan / Drain Trap
2. Float and thermostatic or bucket traps are
recommended for low pressure steam. On high
pressure systems, bucket traps are normally
recommended. The thermostatic traps should be
used only for air venting.
3. Bucket traps are recommended for use with on-off
control only.
4. Locate traps at least 12 inches below the coil
return connection.
Controls
1. On high pressure installations, a two-position
steam valve with a face and bypass arrangement is
preferred where modulating control is required.
2. Modulating valves must be sized properly. DO NOT
UNDERSIZE.
Freezing Conditions (entering air below 35°F.)
1. 5 PSI steam must be supplied to the coil at all times.
2. Modulating valves are not recommended. Control
should be by means of face and bypass dampers.
3. Provision should always be made to thoroughly
mix fresh air and return air before it enters the
coil on return air units. Also, temperature control
elements must be properly located to obtain true
air mixture temperatures.
4. As additional protection against freeze-up, the trap
should be installed sufficiently far below the coil
to provide an adequate hydrostatic head to ensure
removal of condensate during an interruption in the
steam pressure. Estimate 3 feet for each 1 PSI of
trap differential required.
5. On start-up, admit steam to coil ten minutes before
admitting outdoor air.
6. Provision must be made to close fresh air dampers
if steam supply pressure falls below minimum
specified.
Model VFCD/VFCB Vertical Fan Coil
12
®
Yearly
Fan Maintenance
Bearings — Most bearings are permanently
lubricated and require no further lubrication under
normal use. Normal use being considered -20ºF to
120ºF and in a relatively clean environment. Some
bearings are re-lubricatable and will need to be re-
greased depending on fan use. Check your bearings
for grease fittings to find out what type of bearing
you have. If your fan is not being operated under
normal use, bearings should be checked monthly for
lubrication.
Greenheck recommends these procedures to ensure
trouble-free operation of this unit. It is especially
important to maintain heater units for clean and
efficient operation. Most unit failures can be attributed
to poor setup or poor maintenance.
A record of maintenance performed on this unit
should be kept. This information will provide essential
information if problems are encountered. A section at
the back of this manual is provided for recording the
unit’s maintenance history.
Motors — Motor maintenance is generally limited to
cleaning and lubrication (where applicable). Cleaning
should be limited to the exterior surfaces only.
Removing dust and grease buildup on motor housing
assures proper motor cooling. Greasing of motors
is intended only when grease fittings are provided.
Many fractional motors are permanently lubricated
and require no further lubrication. Motors supplied
with grease fittings should be greased in accordance
with manufacturer’s recommendations. When motor
temperature does not exceed 104ºF (40ºC), the grease
should be replaced after 2000 hours of running time
as a general rule.
CAUTION
When performing any maintenance on this unit, be
sure that the power is disconnected and cannot
be accidentally turned on. The control center
disconnect can be locked in the off position.
Two Weeks after Start-Up
Belts - Belts tend to stretch after a period of
time. They should be
periodically checked
for wear and tightness.
Approximately 3/8
inch of deflection per
ft. of span between
sheaves is standard for
belt tightness. When
replacing belts, use the
same type as supplied
with the unit. Matched
belts should always be
Wheels — Wheels require very little attention when
moving clean air. Occasionally, oil and dust may
accumulate on the wheel causing imbalance. When
this occurs the wheel and housing should be cleaned
to assure smooth and safe operation. Inspect fan
impeller and housing for fatigue, corrosion or wear.
Belt Span
64
Deflection =
Belt Span
NOTE: For motors of 1 hp or less a
smaller sliding base bracket
is used to attach to blower.
Routinely check all fasteners, set screws and locking
collars on the fan, bearing, drive, motor base and
accessories for tightness.
used on units with multi-groove pulleys.
Replacement of belts can be accomplished by
loosening the motor to the point where the belts
can be removed by hand. Do not force belts on or
off as this may cause breakage of cords leading to
premature belt failure. Belts should be adjusted as
above.
Every Three (3) Months
Filters - The filter in the unit should be inspected
at least every three (3) months. Depending on the
environment, filters could require changing or cleaning
more or less often. The filters can be slid out of the
coil connection side of the unit.
If washable filters are installed, they can be washed in
warm soapy water. An adhesive spray can be applied
to increase filter efficiency.
If disposable filters are installed, check by holding up
to a light source. If light cannot pass through the filter,
it should be replaced. Replacement filters should be
of the same manufacturer and size. When reinstalling
filters, be sure to install with the airflow in the correct
direction indicated on the filter.
Model VFCD/VFCB Vertical Fan Coil
13
®
Coil Maintenance
Start-Up Documentation
Coils must be clean to obtain maximum performance.
Check once a year under normal operating conditions
and, if dirty, brush or vacuum clean. Soiled fins reduce
the capacity of the coil, demand more energy from the
fan, and create an environment for odor and bacteria
to grow and spread through the conditioned zone.
High pressure water (400 psi or less) may be used to
clean coils with fin thickness over 0.006 inches thick.
Test the spray pressure over a small corner of the
coil to determine if the fins will withstand the spray
pressure.
Job Information
Job Name
_________________________________
Address
_________________________________
City ________________ State ______ Zip ___________
Phone Number _________________________________
Contact Person _________________________________
Start-Up Company Information
Service Oranization _______________________________
Address
City ________________ State ______ Zip ___________
Phone Number
Fax Number
For coils with fragile fins or high fin density, foaming
chemical sprays and washes are available. Many coil
cleaners contain harsh chemicals, so they must be
used with caution by qualified personnel only. Care
must be taken not to damage the coils, including fins,
while cleaning.
_______________________________
_______________________________
_______________________________
_______________________________
Start-Up Date
Start-Up Personnel Name__________________________
CAUTION
Fin edges are sharp.
Nameplate Information
Unit Model Number _______________________________
Volts ________________Hertz ________ Phase _______
Amps _______________Mark _______________________
Fan rpm_____________
Winterizing Coils
Coil freeze-up can be caused by such things as air
stratification and failure of outdoor air dampers and/
or preheat coils. Routine draining of water cooling
coils for winter shutdown cannot be depended upon
as insurance against freeze-up. Severe coil damage
may result. It is recommended that all coils be drained
as thoroughly as possible and then treated in the
following manner.
Unit Serial Number _______________________________
Field Start-Up Documentation
o Check blower rotation
o Check air volume (cfm)
_________ Design
Fill each coil independently with an antifreeze solution
using a small circulating pump and again thoroughly
drain. Check freezing point of antifreeze before
proceeding to next coil. Due to a small amount of
water always remaining in each coil, there will be
diluting effect. The small amount of antifreeze solution
remaining in the coil must always be concentrated
enough to prevent freeze-up.
_________ Actual
o Actual motor voltage
o Actual motor hertz
o Actual motor phase
o Actual motor amps
_________ Volts
_________ Hertz
_________ Phase
_________ Amps
NOTE: Carefully read instructions for mixing antifreeze
solution used. Some products will have a higher
freezing point in their natural state than when mixed
with water.
Drive
o Fan RPM Range
_________ Minimum
_________ Maximum
Drain Pan Maintenance
Drain pans in any air conditioning unit will have
some moisture in them, therefore, algae and other
organisms will grow due to airborne spores and
bacteria. Periodic cleaning is necessary to prevent
this buildup from plugging the drain and causing the
drain pan to overflow. Inspect twice a year to avoid
the possibility of overflow. Also, drain pans should be
kept clean to prevent the spread of disease. Cleaning
should be performed by qualified personnel.
Model VFCD/VFCB Vertical Fan Coil
14
®
Maintenance Log
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Date __________________ Time _____________ AM/PM
Notes:___________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
Model VFCD/VFCB Vertical Fan Coil
15
®
Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from
the purchase date. Any units or parts which prove defective during the warranty period will be replaced at our option
when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer for a period of
one year. Should motors furnished by Greenheck prove defective during this period, they should be returned to the
nearest authorized motor service station. Greenheck will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Greenheck Catalog IAH Series (MSCF-FC • MSCF-BI •
LFC-C • VFC-FC • VFCD-FC) provides additional information
describing the equipment, fan performance, available
accessories, and specification data.
AMCA Publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans, provides
additional safety information. This publication can be
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected] • Website: www.greenheck.com
464696 • VFCD/VFCB Vertical Fan Coil, Rev. 1, December 2008
Copyright 2008 © Greenheck Fan Corporation
16
|