COOK Economizer Fan User Manual
Economizer Fan
Economizer Fans
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
This publication contains the installation, operation
and maintenance procedures for standard units of the
Economizer Fan-Economizer Fans with Mix, Recirculate, Supply and Exhaust Modes
publication prior to installation.
Loren Cook catalog,
information describing the equipment, fan performance,
available accessories and specification data.
For additional safety information, refer to AMCA publication 410-96,
Industrial and Commercial Fans
All of the publications listed above can be obtained from
Loren Cook Company Literature Department by phoning
417/869-6474, extension 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.
Safety Practices for Users and Installers of
Economizer Fan
. Carefully read this
, provides additional
.
Receiving and Inspection
Carefully inspect the fan and accessories for any damage
and shortage immediately upon receipt of the fan.
The control panel, if ordered, is shipped inside of the
roof base. It is not counted as a separate part.
• Turn the propeller by hand to ensure it turns freely and
does not bind.
• Check the dampers for free operation of all moving
parts.
• Record on the
age.
Delivery Receipt
any visible sign of dam-
Handling
Lifting bars are located on the top of the cabinet assembly. They should be used to lift the unit and also to lower the
unit on to the curb. The hood assembly should be lifted by
the shipping crate or the base assembly.
Storage
If the unit 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.
through the roof curb until the assembly’s outer flange
rests on the top of the roof curb. The curb should be
level to allow the cabinet to hang free.
c. Assemble the hood to hood base. Refer to
Assembly
d. Lower the hood assembly on to the roof curb and
secure it and the cabinet assembly to the roof curb with
anchor bolts or lag screws as required.
e. Pre-wire the service switch on the roof base, if
equipped.
f. Install the hood assembly filters, if required. Refer to
Filtered Units Only
g. Install the outlet diffuser on the lower end of the cabinet
assembly, if equipped. Place the diffuser over the bottom of the cabinet assembly. Secure the diffuser to the
cabinet with number 12 sheet metal screws installed
through the flange, spaced at 6 inch intervals around
the perimeter.
continued
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.
instructions on page 2.
section on page 2.
Hood
WARNING
This unit has rotating parts. Safety precautions
should be exercised at all times during installation,
operation, and maintenance.
ALWAYS disconnect power prior to working on fan.
Installation
a. Ensure there is a minimum 3 inch clearance between
the interior of the building and the unit’s side dampers.
b. Attach lifting straps to the lifting bars at the top of the
cabinet assembly. Lift the assembly and then lower it
Economizer
h. If no outlet diffuser is supplied, install the outlet guard
over the bottom of the cabinet assembly. Secure the
outlet guard to the cabinet with number 12 sheet metal
screws installed through the flange, spaced at 6 inch
intervals around the perimeter.
i. Install the control panel, if equipped, in a convenient
location. Refer to the wiring installation section, page 3
for wiring instructions.
B
A
D
F
E
F
Figure 1
C
B
A
E
Hood Assembly
Hoods on some non-filtered units (size 54 or larger) and
some filtered units (size 48 or larger) require field assembly.
Assembly is accomplished using 1/2 inch and 9/16 inch
socket wrenches. Line-up punches and hand clamps will
speed up the assembly. Figure 1 shows the components
used to assemble 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 together. The topcaps (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) 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.
Filtered Units Only
e. Place the two long filter retainers (E) and the two short
filter retainers (F) on top of the base and bolt the pieces
together.
f. Bolt the long filter retainers (E) to the perimeter angles
(C) that are at the ends of each hood.
g. Install filters according to the Filter Schedule. Insert the
edge of the filter into the filter retainer (E), swing filter
into position and flip the filter holding the clip into position. Refer to the Filter Installation Detail illustration.
E
Economizer Fan Filter Installation Detail
Control Panel Installation
(if equipped)
The optional control panel is used to control the functions
of the Economizer fan. Locate the panel in a convenient
area to install wiring and operate the fan. Permanently
attach the control panel to a suitable structure by bolting
through the back of the panel.
Temperature Sensor Installation
(if equipped)
A temperature sensor is supplied as a part of the optional
Modulating Temperature Control. To prevent damage to the
fan during transit, the temperature sensor is shipped loose
(inside the control panel). Follow the instructions below to
mount the temperature sensor.
a. Drill a 11/32 inch diameter hole in one corner of the
venturi panel, located in the bottom of the fan cabinet.
b. From the inside of the cabinet, screw the compression
fitting (shipped with the sensor) into the hole.
c. Install the sensor through the hole (push through 1/2”).
d. Tighten the fitting to hold the sensor in place.
Type 2
Type 1
Type 1
Type 1
Type 2 Type 2 Type 2 Type 2 Type 2
Type 2
Type 2
Economizer Fan
Filter Schedule
Type 2 Type 2
Type 1
Type 1
Type 1
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.
Follow the wiring diagram in the disconnect switch
and the wiring diagram provided with the motor.
2
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 Diagram
, below.
Fan accessories will determine the wiring installation
procedure you should follow. If your unit has a disconnect
switch, follow the wiring diagram provided on the disconnect switch and the wiring diagram on 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).
Lock off all power sources before unit is wired to
power source. Restrain the wire as necessary to prevent it from being pulled into any rotating parts.
Control Panel Wiring Diagram
Lights
on Door
Supply
Fan Wiring
Drill a wire access hole through the cabinet side below
one of the access doors. Attach the appropriate size wire
and conduit to the motor and run the wires to the control
panel. Attach wires (18 gauge minimum) to the damper
actuator (Red, Black, #3) and the temperature sensor (Red,
2-Black), if equipped, and run the wires to the control
panel. Attach the fan wires to the control panel terminals
according the diagram below.
A terminal (1) is available for use with remote stop controls. Closing a relay between terminals 1 and 5 will do the
same function as pushing the stop button on the front of the
panel.
Wire the roof disconnect switch, if equipped, and the fan
motor. The fan should rotate clockwise, when looking up
from the bottom, in supply mode. The rotation may be
changed by switching two of the three motor leads. When
rotation is correct, reinstall the access panels.
20"
Optional
Modulating Temperature Control
16"
Start/Mode
Red
Red
Button
Stop
Button
Neutral
120VAC
G
N
N
Mix
Recirculate
Exhaust (MRSE-D Only)
Ground
No Field
Connection
RTD (Optional)
24 VDC +
24 VDC Remote Cool Thermostat
24 VDC Remote "Supply On"
24 VDC Remote "Mix On"
24 VDC Remote "Recirculate On"
24 VDC Remote "Exhaust On"
24 VDC Remote "Stop"
Customer Supplied Controls For External Input
White
3
R
45
R
L
W
2
678910
1
L
TT
ABCT
Load
Fan Motor
Line
Fan Voltage
5VDC-10VDC POS
24VAC COM / 5VDC-10VDC
24VAC
Damper Actuator Connections
NC
NC
3
Black
Red
4
5
3
Loading...