Greenheck Fan Fan LFC User Manual

Part #464496

Low-Proﬁle 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 LFC

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.

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Lifting Instructions

Table of Contents

Greenheck’s Low-Proﬁle Fan Coil (LFC) should be

lifted by the factory supplied lifting lugs or frame rails

and a spreader bar (by others) to prevent damage

from occurring to the equipment (see Figure 1). Avoid

twisting or uneven lifting of equipment. Do not lift

equipment by coil connections or headers. The unit

must remain upright during lifting. All access doors

and panels must be closed during lifting to avoid

damage.

Installation

Unit Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Lifting / Hanging Instructions. . . . . . . . . . . . . . . . 3

Dimensions / Weights. . . . . . . . . . . . . . . . . . . . . . 4

Filter Sizes / Quantity . . . . . . . . . . . . . . . . . . . . . . 4

Coil Dimensions . . . . . . . . . . . . . . . . . . . . . . . . .5-6

Start-Up

System Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Troubleshooting

Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Motor Overamps . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Insufficient / Too Much Airflow. . . . . . . . . . . . . . . 8

Excessive Noise or Vibration . . . . . . . . . . . . . . . . 8

Start-Up

Spreader Bar

Frame Rails

Coil Module . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-10

Drain Pan / Drain Trap . . . . . . . . . . . . . . . . . . . . 10

Maintenance

Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Drain Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Reference

Lifting Lugs

Start-Up Documentation. . . . . . . . . . . . . . . . . . . 12

Maintenance Log . . . . . . . . . . . . . . . . . . . . . .13-15

Warranty . . . . . . . . . . . . . . . . . . . . . . . . .Backcover

Figure 1

Hanging Instructions

The LFC should be hung by the factory supplied

lifting lugs or field supplied frame rails as shown

respectively in Figures 2 and 3. All hanging brackets

must be used to mount the unit. The LFC is available

with both external neoprene and spring isolation

options.

Unit Layout

Airﬂow

1. Fan Section

2. Coil Section

Figure 2

• Chilled Water

• DX Coils

3. Inlet Filter

• Hot Water

• Steam Coils

Vertical inlet ﬁlter with quarter-turn fasteners

4. Lifting Lugs/Hanging Brackets

Six (6) lifting lugs for each unit

5. Side Access Panels

Right and left access to each unit. (Image shows

panels removed).

Figure 3

6. 1¹⁄4 inch knockout is provided for the recommended

electrical wiring penetration or disconnect switch.

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Unit Dimensions

Top View

Elevation View

Inlet

Height

Outlet

Height

4.0

6.5

8.0

9.0

Unit

Size

Width

w/o Filter w/ 2 in. Filter w/ 4 in. Filter

Width

6.75

8.5

8.0

11.0

13.0

15.5

14.25

16.75

21.75

11.0

14.0

16.0

18.5

21.0

26.0

9.0

12.0

14.0

16.5

19.0

24.0

9.0

10.0

12.75

15.0

10.25

12.0

All dimensions are in inches.

Weights

Fan w/ Drain Pan

Unit

Size

2 in. Vertical

Filter

4 in. Vertical

Filter

1 Row 2 Row 4 Row 6 Row 8 Row

Fan

Motor

Total

128

151

175

199

250

316

405

450

178

201

235

259

325

391

480

550

100

105

135

165

195

225

255

285

106

129

152

175

198

221

110

127

143

160

100

All weights are shown in pounds (lbs.) Motor weights may vary depending on enclosure type and horsepower.

Mounting Dimensions

Filter Sizes and Quantity

Horizontal Hanging

Size

Filter Size

9 x 18

Qty

Face Area (ft²)

Unit

Size

1.8

40 18.25 19.75 38

0.5

2.5

12 x 12

12 x 24

14 x 18

16 x 16

16 x 20

16 x 24

18 x 24

24 x 24

12 x 24

24 x 24

2.5

3.0

3.4

4.8

5.4

7.2

All dimensions are in inches.

8.9

All dimensions are in inches.

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Coil Dimensions

Hot Water • 1 and 2 Row

Unit Size

7.63

0.75

Copper Sweat

Airﬂow

10.13

12.63

15.13

17.63

22.63

0.875

1.125

1.375

Outlet

3.75

0.75

All dimensions are in inches.

1.5

Drain Connection

NOTE

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

7.63

0.75

10.13

12.63

15.13

17.63

22.63

Copper Sweat

0.875

1.375

Airﬂow

Outlet

All dimensions are in inches.

3.75

0.75

NOTE

1.5

Drain Connection

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).

0.25 vent and drain supplied. Right side connection shown.

Steam • 1 and 2 Row

Unit Size

7.0

6.94

8.19

9.44

1.5

2.5

3.81

3.56

3.81

3.56

4.81

3.56

Steel MPT

Airﬂow

9.44

10.69

13.19

Outlet

All dimensions are in inches.

0.75

Drain Connection

1.5

NOTE

Steam enters the coil from the center connection

(Inlet) and exits from the bottom (Outlet).

Right side connection shown.

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Chilled Water • 4, 6 or 8 Row

4 row

6 row

8 row

Unit Size

7.63

0.75

1.375

1.625

Copper Sweat

10.13

12.63

15.13

17.63

22.63

Airﬂow

0.875

1.375

0.875

1.375

Outlet

3.75

All dimensions are in inches.

0.75

Drain Connection

NOTE

1.5

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)

0.25 vent and drain supplied. Right side connection shown.

Direct Expansion (DX) • Single Circuit • 4, 6 or 8 Row

4 row

6 row

8 row

Unit

Size

5.75 0.625 0.625 0.625 0.625 0.625 1.375

Airﬂow

7.0

8.0

9.5

0.625 0.625 0.625 0.625 0.625 1.375

0.875 1.375 0.875 1.375 0.875 1.375

Copper Sweat

50 10.75 0.875 1.375 1.125 1.375 0.875 1.625

65 13.00 1.125 1.375 1.125 1.375 1.125 1.625

85 13.00 1.125 1.375 1.125 1.375 1.125 1.625

All dimensions are in inches.

Outlet

3.75

0.75

1.5

Drain Connection

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).

Distributor hookup is done inside module through 2-inch access hole.

Right side connection shown.

Direct Expansion (DXI) • Dual Circuit with 50/50 Face Interlaced Construction • 4, 6 or 8 Row

4 row

Unit

6 row

8 row

Size

Airﬂow

12.00 7.00 0.625 0.625 0.625 0.875 0.625 0.875

13.50 7.75 0.625 0.625 0.625 0.875 0.625 1.125

17.00 9.50 0.875 0.875 0.875 1.125 0.875 1.125

Copper Sweat

Outlet

0.75

All dimensions are in inches.

3.75

NOTE

1.5

Drain Connection

The first suction header on the entering air side of

the coil is circuited to the top distributor. 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).

Distributor hookup is done inside module through 2-inch access hole.

Right side connection shown.

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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

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.

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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

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

Clean wheel and housing

Sheaves eccentric or out-of-balance

Accumulation of material on wheel

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2. The condensate drain pipe should be sized

adequately to ensure the condensate drains

properly. See Drain Pan Traps section and related

drawing.

Start-Up of Coil Module

Hot Water, Chilled Water Coils

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.

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.

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.

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.

DXI coils have dual connections and should be used

with two compressors.

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 the

coil. Vent is to be located behind the connections

side access door.

Steam Coils

Application Recommendations

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.

Satisfactory operation

and service life are

best ensured

when coils

are installed

with proper

piping, trap

WARNING

and support

arrangement.

The following

notes and

Continuous water circulation through the coil at all

times is highly recommended.

drawing are

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.

recommended

for the coil unit

installation

and operation.

Strainer

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.

General

Float & Thermostat Trap

1. Provide

Gate Valve

separate

supports

Check Valve

Vacuum Breaker

Control Valve

Modulating Two-Position

and hangers

for the unit and the piping.

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. Be certain that adequate piping flexibility is

provided. Stresses resulting from expansion of

closely coupled piping and coil arrangement can

cause serious damage.

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Steam Coils, General - continued

Freezing Conditions (entering air below 35°F)

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.

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. 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.

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. 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.

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.

6. Do not attempt to lift condensate when using

modulating or on-off control.

Drain Pan / Drain Trap

7. Do not reduce the pipe size leaving the coil.

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.

Traps

1. Size traps in accordance with the manufacturer’s

recommendations. Be certain that the required

pressure differential will always be available. DO

NOT UNDERSIZE.

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.

2P = minimum

4. Locate traps at least 12 inches below the coil

return connection.

2P = minimum

Controls

1. On high pressure installations, a two-position

steam valve with a face and bypass arrangement is

preferred where modulating control is required.

Drain Pan / Drain Trap

2. Modulating valves must be sized properly. DO NOT

UNDERSIZE.

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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 relubricatable and will need to be

regreased 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

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 multigroove 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 either

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.

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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 LFC Low-Profile Fan Coil

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Maintenance Log