COOK FCRU User Manual

FCE / FCRU

Fiberglass Roof Exhausters

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

This publication contains the installation, operation and
maintenance instructions for standard units of the FCE /
FCRU Fiberglass Roof Exhausters.

• FCED / FCEB

• FCRUD / FCRUB

Carefully read this publication and any
supplemental documents prior to any
installation or maintenance procedure.

Loren Cook Fiberglass catalog provides 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.

The publication(s) 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 and instructions on special equipment,
contact Loren Cook Company at 417.869-6474.

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.

Handling

Lift the fan by the shipping carton. NOTICE! Never lift by

the shaft, motor or housing.

Storage

If the fan is stored for any length of time prior to
installation, completely fill the bearings with grease or
moisture-inhibiting oil (refer to Lubricants on page 6).
Rotate the wheel several revolutions every three to five
days to keep a coating of grease on all internal bearing
parts.

Store the fan in its original crate and protect it from dust,
debris and the weather.

To maintain good working condition of the fan when it is

stored outdoors, follow the additional instructions below.

• Coat the shaft with grease or a rust preventative
compound.

• Wrap bearings for weather protection. Cover the inlet
and outlet to prevent the accumulation of dirt and
moisture in the housing.

• Periodically rotate the wheel and operate dampers (if
supplied). Periodically inspect the unit to prevent
damaging conditions.

Installation

If the fan was delivered with the motor unmounted, see

the maintenance section for belt and pulley installation.

Receiving and Inspection

Immediately upon receipt of the fan, carefully inspect the

fan and accessories for damage and shortage.

• Turn the wheel 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.

FCE

FCRU

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.

motors have to be removed in order to make the connection
with the terminal box at the end of the motor.

NOTICE! 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).

1. Remove the top cap which covers the motor assembly
by unbolting the lid.

2. For internal wiring, run the electrical wire and conduit
through the opening drilled in the damper shelf (refer to
Damper Installation), then through the wiring conduit in
the ventilator base to the motor compartment. For
external wiring, run the wires through the horizontal
conduit on upblast units, or under top cap in downblast
units.
Pull the wires through and complete the wiring. For further

3.
information. Refer to Wiring Diagrams on page 3.

Damper Installation

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

1. Place the damper inside the curb or inside the duct

work. Ensure the damper will open freely for the correct

direction of the airflow.

2. Secure to curb at the damper shelf.

3. Drill hole in the curb shelf for conduit needed for motor

wiring.

4. Operate the dampers manually to ensure the blades

move freely.

5. Install fan over curb while aligning the conduit location

with the conduit hole in the curb.

Wiring Installation

NOTICE! 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. (See page 3 for diagram)

NOTICE! Fan must be grounded to prevent electrical

discharge.

For Units Without A Junction Box:

An approved metal field wiring compartment must be
secured to the unit with two screws in order that the box
does not rotate. All wires must be protected from abrasion
where they enter and exit the wiring compartment. The
green ground wire from the motor must be secured under
the green ground screws inside the field wiring compartment
using a closed loop connector. Complete connections in
accordance with the wiring diagram on the motor.

For Units With A Junction Box:

Pull wires through the appropriate conduit. Protect wires
from abrasion where they enter the field wiring compartment
and complete connections in accordance with the diagram
on the motor.

Leave enough slack in the wiring to allow for motor
movement when adjusting belt tension. Some fractional

Final Installation Steps

1. Ensure fasteners and set screws, particularly fan
mounting and bearing fasteners are tightened
according to the recommended torque shown on the
table below.

2. Inspect for correct amperage with an ammeter and
correct voltage with a voltmeter.

3. Ensure that all accessories are installed.

4. Test the fan to be sure the rotation is the same as
indicated by the arrow marked ‘Rotation’.

NOTICE! Do not allow the fan to run in the wrong
direction. This will overheat the motor and cause
serious damage. For 3-phase motors, if the fan is
running in the wrong direction, check the control
switch. It is possible to interchange two leads at
this location so that the fan is operating in the
correct direction.

5. Inspect wheel-to-inlet clearance. Wheels may shift in
shipment. To realign wheel-to-inlet, shift upper bearing
so there is an equal radial clearance between the wheel
and inlet. Refer to wheel to inlet clearance on page 6.

Recommended Torque for Setscrews/Bolts on metal(IN-LB)

Setscrews

Size

No.10 3/32” 28 33 3/8”-16 240

1/4” 1/8” 66 80 1/2”-13 600

5/16” 5/32” 126 156 5/8”-11 1200

3/8” 3/16” 228 275 3/4”-10 2100

7/16” 7/32” 29 348 7/8”-9 2040

1/2” 1/4” 42 504
5/8” 5/16” 92 1104
3/4” 3/8” 120 1440

Key Hex

Across

Flats

Recommended

Torque

Min. Max. Size

Recommended Torque for Setscrews/Bolts on FRP (FT-LB)

Size (inches) 18-8 SST Hardware Torque

No 10 7

1/4” 12

5/16” 20

3/8” 30

7/16” 41

1/2” 54
5/8” 86
3/4” 128

Hold Down Bolts

Wrench

Torque

2