Loren Cook HEF-D Installation Manual

Personal Safety

Disconnect switches are recommended. Place
the disconnect switch near the fan in order that
the power can be swiftly cut off in case of an
emergency, and in order that maintenance per­sonnel are provided complete control of the
power source.

H-Series

WARNING

This unit has rotating parts. Safety precautions
should be exercised at all times dur ing ins tallat ion,
operation, and maintenance.
ALWAYS disconnect power prior to working on fan.

Hooded Propeller Roof Fans

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation

and maintenance procedures for standard units of the

H-Series - Hooded Propeller Roof Fans.

•HEE/HES •HXF

•HEF •HEE-D/HES-D

•HER •HEF-D

•HXE/HXS •HER-D

Carefully read this publication prior to any installa-

tion or maintenance procedure.

Loren Cook catalog, H-Series Belt Drive and H-Series

Direct Drive, provide additional information describing the

equipment, fan performance, available accessories and
specification data.

For additional safety inform ation, refer to AM CA publica­tion 410-96, Safety Practices for Users and Installers of
Industrial and Commercial Fans.

All of the publications listed above can be obtained from
Loren Cook Company by phoning 417/869-64 74, exten sion
166; by FAX at 417/832-9431; or by e-mail at info@loren­cook.com.

For information and instructions on special equipment,
contact Loren Cook Company at 417/869-6474.

Receiving and Inspection

Carefully inspect the fan and accessories for any dam­age and shortage immediately upon receipt of the fan.

• Turn the propeller by hand to ensure it turns freely and
does not bind.

• Check dampers (if included) for free operation of all
moving parts.

• Record on the Delivery Receipt any visible sign of
damage.

Handling

Lift the fan by the base or by the shipping carton. Never

lift by the shaft, motor or housing.

If your fan has a special protective finish, handle with
extreme care. Even a small chip will break the coating’s
continuity and destroy its ability to protect the metal.

Propellers are carefully balanced to give smooth, vibra­tion-free operation. If the propeller is damaged during han­dling, it will require rebalancing.

dust, debris and the weather.

Outdoor Storage

To maintain good working condition of the fan when it is
stored outdoors or at a construction site, follow the instruc­tions below.

• Coat the shaft and bearings with grease or rust preven­tative compound to help seal out moisture.

• Periodically rotate the propeller and operate the damp-

ers (if supplied) to keep a coating of grease on all inter­nal bearing parts.

• Periodically inspect the fan to prevent damaging condi-

tions.

• Block propeller to prevent natural rotation.

• Cover the unit with some type of weath er cover to pre-

vent moisture, corrosion, dirt or dust accumulation.

Installation

Damper Installation

If your fan is supplied with dampers, follow the directions
below. If your fan does not include dampers, proceed to
Motor Installation.

a. Place the damper inside the curb. Ensure the damper

will open freely for the correct direction of the airflow.
b. Secure to curb at the damper shelf.
c. Drill a hole in the curb shelf for conduit needed for

motor wiring.
d. Operate the dampers manually to ensure the blades

move freely. Dampers should be released from full

open position to check for proper closing.

Motor Installation

If your fan is a direct drive (model HEE-D, HES-D, HEF-D

or HER-D), proceed to Wiring Installation.

Storage

If the fan is stored for any length of time prior to installa-

tion, store it in its original shipping crate and protec t it from

H-Series

Fan

Motor

Damper

Motor*

Second
Damper

Motor

T

ransformer**

T

ransformer**

L3
L2
L1

4

5

6

1
728

3
9

L

1

L2L

3

456

789

12

3

L

1

L2L

3

Low Voltage

208/230 Volts

High Voltage

460 Volts

3 Phase, 9 Lead Motor
Y-Connection

7

1

6

789
456

12

3

Low Voltage

208/230 Volts

High Voltage

460 Volts

8
2

4

9
3

5

L1L

3

L

2

L

1

L

3

L

2

3 Phase, 9 Lead Motor
Delta-Connection

Wiring Diagrams

Wiring Diagrams

Single Speed, Single Phase Motor

Ground A

L

T-1

T-4

Ground B

1

Line
L

2

When ground is required, attach to ground A or B with no. 6 thread forming
screw. To reverse, interchange T-1 and T-4.

To reverse, interchange any 2 line leads.

2 Speed, 2 Winding, Single Phase Motor 2 Speed, 1 Winding, 3 Phase Motor

Ground A

T-1
T-4

Ground B

When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-1 and T-4 leads.

High Speed

L

1

L

2

Low Speed

Line

1

Together

2

Motor

3

L

1

4

L

5

2

6

Line

L

3

Motor

To reverse, interchange any 2 line leads. Motors require magnetic control.

Single Speed, Single Phase, Dual Voltage 2 Speed, 2 Winding, 3 Phase

Ground A

L

T-5

J-10

Ground B

Link A
Link B

Low Voltage

Line

L

1

T-5

J-10

2

Ground B

When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-5 and J-10 leads.

Ground A

Link A & B

High Voltage

L

1

Line

L

2

T

Low Speed

3

Low Speed

T

2

Low Speed

T

Motor

T
T
T

1

11
12
13

High Speed
High Speed
High Speed

To reverse: High Speed-interchange leads T11 and T12.
Low Speed-interchange leads T
line leads.

and T2. Both Speeds-interchange any 2

1

Typical Damper Motor Schematic

Low SpeedHigh Speed

L

1

1

L

2
3

4
5
6

2

L

3

Open

Line

L
L
L

1
2

Line

3

To prevent damage to the fan during shipping, motors 5
HP and larger, and extremely heavy motors (cast iron or
severe duty) are shipped loose and must be fie ld mounted.

The motor should be mounted in order that the motor
plate is between the fan shaft and the motor shaft.

a. Remove the motor plate mounting bolts and the moto r

plate.

b. Remove the motor mounting bolts from the motor

plate.

c. Mount the motor to the motor plate aligning to the

appropriate holes.

d. Place the motor plate on the power assembly and rein -

stall the mounting bolts.

Belt and Pulley Installation

Belt tension is determined by the sound of the belts when
the fan is first started. The belts will produce a loud squeal,

For 3 phase, damper motor voltage should be the same between L1 and

. For single phase application, disregard L3. *Damper motors may be

L

2

available in 115, 230 and 460 volt models. The damper motor nameplate
voltage should be verified prior to connection. **A transformer may be pro­vided in some installations to correct the damper motor voltage to the
specified voltage.

which dissipates after the fan is operating at full capacity. If
belt tension is too tight or too loose, lost efficiency and dam­age can occur.

Do not change the pulley pitch diameter to change ten-

sion. The change will result in a different fan speed.

a. Loosen the motor plate adjustment nuts on motor b ase

and move motor plate in order that the belts can easily
slip into the grooves on the pulleys. Never pry, roll, or
force the belts over the rim of the pulley.

b. Adjust the motor plate until proper tension is reached.

For proper tension, a deflection of approximately 1/4”
per foot of center distance should be obtained by firmly

pressing the belt. Refer to Figure 1.
c. Lock the motor plate adjustment nuts in place.
d. Ensure pulleys are properly aligned. Refer to Figure 2.

2

Pulley Alignment

1 foot

1/4 inch

Figure 1

Figure 2

Tolerance

Center Distance

Maximum

Gap

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48” 1/4”

Personal Safety

Disconnect switches are recommended. Place the
disconnect switch near the fan in order that the
power can be swiftly cut off in ca se of an emerge ncy,
and in order that maintenance personnel are pro­vided complete control of the power source.

B

G

C

B

A

E

F

D

F

E

E

Filter

Filter Installation Detail

G

E

C

F

Pulley alignment is adjusted by loosening the motor pul­ley setscrew and by moving the motor pulley on the motor
shaft.

OFFSET ANGULAR OFFSET/ANGULAR

A

W

ference in width. Figure 3 illustrates using a
carpenter’s square to adjust the position of
the motor pulley until the belt is parallel to
the longer leg of the square.

Wiring Installation

All wiring should be in accordance with
local ordinances and the National Electrical
Code, NFPA 70. Ensure the power supply

Figure 3

(voltage, frequency, and current carrying capacity of wires)
is in accordance with the motor nameplate. Refer to the
Wiring Diagrams, previous page.

Lock off all power sources before unit is wired to
power source.

Leave enough slack in the wiring to allow for motor
movement when adjusting belt tension. Some fractional
motors have to be removed in order to make the connec­tion with the terminal box at the end of the motor.

B

CENTER

DISTANCE

(CD)

GAP

X
Y

Z

Figure 2 indicates where to measure the allowable gap
for the drive alignment tolerance. All contact points (indi­cated by WXYZ) are to have a gap less than the tolerance
shown in the table. When the pulleys are not the same
width, the allowable gap must be adjusted by half of the dif-

Figure 4

GAP

Follow the wiring diagram in the di sc o nn e ct swi tc h
and the wiring diagram provided with the motor. Cor­rectly label the circuit on the main power box and
always identify a closed switch to promote safety (i.e.,
red tape over a closed switch).

Fan Installation

The fan support (roof curb) should provide a level surface
for installation. If the roof is pitched more than 1/2:12, a
sloped curb must be used to correct the problem.

Place fan over roof opening. Secure the fan with lag

screws, anchor bolts, or other suitable fasteners.

Hood Assembly

Hoods for some non-filtered fans (size 54 and
larger) and some filtered fans (size 48 or larger)
require field assembly . Assembly is accomplished
using 1/2” and 9/16” socket wrenches. Line-up
punches and hand clamps will speed up the
assembly. Figure 4 shows the components used
to assembly the hood.

a. Place the hood halves (A) onto the hood sup-

ports (D). Line up the hood flanges an d bolt the
flanges of the hood ends (G) together. The top
caps (B) must be interlocked for the flanges to
meet correctly.

b. Go under the hood and bolt the hood (angle

flange) to the hood supports (D) at the four
overlapping locations.

c. Install the two perimeter angles (C), that were

shipped loose, inside each end of the hood.

d. If there is a gap between the top cap edges,

loosen the top cap bolts. Install a bolt in each
end of the top cap flange to pull the two top
caps together. Tighten the top cap bolts.

3