Greenheck Fan Fan 464696 User Manual

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  
 
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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  
 
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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  
512  
7
Height  
Width  
634  
634  
Height  
600  
800  
40  
40  
44  
44  
52  
52  
52  
24  
24  
24  
30  
34  
34  
50  
24  
24  
28  
28  
28  
28  
32  
512  
512  
558  
558  
558  
558  
1038  
4
612  
8
18  
22  
1300  
1600  
2000  
2400  
3000  
18  
22  
18  
812  
22  
22  
18  
9
9
29  
23  
26  
10  
9
29  
23  
26  
3278  
1014  
1234  
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  
 
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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  
 

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