COOK H-Series User Manual

H-Series

Hooded Propeller Roof Fans

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation and
maintenance instructions 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 and any
supplemental documents prior to any
installation or maintenance procedure.

Loren Cook catalogs 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 information, refer to AMCA
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 [phone],
extension 166; by FAX at [phone]; or by e-mail at
[e-mail].

For information on special equipment, contact Loren
Cook Company Customer Service Department at
[phone].

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.

NOTICE! Never lift by the shaft, motor or housing.

NOTICE! 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.

Storage

If the fan is stored for any length of time prior to
installation, store it in its original shipping crate and protect
it from 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
dampers (if supplied) to keep a coating of grease on all
internal bearing parts.

• Periodically inspect the fan to prevent damaging
conditions.

• Block propeller to prevent natural rotation.

• Cover the unit with some type of weather cover to
prevent moisture, corrosion, dirt or dust accumulation.

Rotating Parts & Electrical Shock Hazard:

Disconnect electric power before working on unit.
Follow proper lockout / tagout procedures to ensure

the unit cannot be energized while being installed or
serviced.

A disconnect switch should be placed 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.

Grounding is required. All field-installed wiring must
be completed by qualified personnel. All field­installed wiring must comply with National Electric
Code (NFPA 70) and all applicable local codes.

Failure to follow these instructions could result in
death or serious injury.

H-Series

Wiring Diagrams

Single Speed, Single Phase Motor

Ground A

L

T-1

T-4

Ground B

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

1

Line
L

2

Wiring Diagrams

3 Phase, 9 Lead Motor
Y-Connection

Low Voltage

208/230 Volts

4

5

6

3

1

9

728

L2L

L

3

1

To reverse, interchange any 2 line leads.

High Voltage

460 Volts

456

789

3

12

L2L

L

3

1

208/230 Volts

3 Phase, 9 Lead Motor
Delta-Connection

Low Voltage

7
6

1

L

L

1

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 T1 and T2. Both Speeds-interchange any 2
line leads.

Typical Damper Motor Schematic

Fan

Motor

Transformer**

L3
L2
L1

Transformer**

For 3 phase, damper motor voltage should be the same between L1 and
L2. For single phase application, disregard L3. *Damper motors may be
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.

High Voltage

9

8

5

4

3

2

L

3

2

Low SpeedHigh Speed

460 Volts

789
456

3

12

L1L

L

3

2

L

1

1

L

2
3

4
5
6

2

L

3

Open

Line

L
L
L

1
2

Line

3

Damper

Motor*

Second
Damper

Motor

Installation

The attachment of roof mounted fans to the roof curb
as well as the attachment of roof curbs to the building
structure must exceed the structural requirements
based on the environmental loading derived from the
applicable building code for the site. The local code
official may require variations from the recognized
code based on local data. The licensed engineer of
record will be responsible for prescribing the correct
attachment based on construction materials, code
requirements and environmental effects specific to
the installation.

Failure to follow these instructions could result in
death or serious injury.

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.

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 field mounted.

2

The motor should be mounted in order that the motor

1 foot

1/4 inch

plate is between the fan shaft and the motor shaft.

a. Remove the motor plate mounting bolts and the motor

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

reinstall 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, 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 ten­sion. The change will result in a different fan speed.

a. Loosen the motor plate adjustment nuts on motor

base 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.

Pulley Alignment

Figure 1

Pulley alignment is adjusted by loosening the motor pul-

ley setscrew and by moving the motor pulley on the motor
shaft.

E

Figure 4

F

B

G

D

F

E

F

C

C

E

G

E

Filter

Filter Installation Detail

Tolerance

Center Distance

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48” 1/4”

Figure 2

Maximum

Gap

OFFSET ANGULAR OFFSET/ANGULAR

A

W

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 difference 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

Figure 3

square.

Wiring Installation

All wiring should be in accordance with local
ordinances and the National Electrical Code,
NFPA 70. Ensure the power supply (voltage, fre­quency, and current carrying capacity of wires)
is in accordance with the motor nameplate.
Refer to the Wiring Diagrams, previous page.

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.

Follow the wiring diagram in the disconnect
switch 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 42 and larger) and

some filtered fans (size 36 or larger) require field assembly .

B

Assembly is accomplished using 1/2” and 9/16” socket

wrenches. Line-up punches and hand clamps will speed up

A

the assembly. Figure 4 shows the components used to
assembly the hood.

a. Place the hood halves (A) onto the hood supports (D).

Line up the hood flanges and 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.

3

GAP