Munters CX Series User manual

1© Munters Corporation, August 2023 QM1243r0
Instruction Manual
CX74 Fan with Munters Drive
Models: CX74D3F43-HO-1PK • CX74D3F43-HO-2PK •
CX74D3F43-HO-3PK
CX74 Munters Drive Front View
CX74 Munters Drive Rear View
Aerotech
CX Series
Circulation Fan
74” Fan with
Munters Drive*
              

© Munters Corporation, August 2023
2QM1243r0
CX74 Fan with Munters Drive
Instructions for Use and Maintenance
Thank You:
Thank you for purchasing a Munters CX74 Circulation Fan with Munters Drive. Munters equipment is designed to
be the highest performing, highest quality equipment you can buy. With the proper installation and maintenance
it will provide many years of service.
Please Note:
To achieve maximum performance and ensure long life from your Munters product it is essential that it be installed
and maintained properly. Please read all instructions carefully before beginning installation.
Warranty:
For Warranty claims information see the “Warranty Claims and Return Policy” form QM1021 available from the
Munters Corporation office at 1-800-227-2376 or by e-mail at [email protected].
Conditions and Limitations:
• Products and Systems involved in a warranty claim under the “Warranty Claims and Return Policy” shall have
been properly installed, maintained and operated under competent supervision, according to the instructions
provided by Munters Corporation.
• Malfunction or failure resulting from misuse, abuse, negligence, alteration, accident or lack of proper installation
or maintenance shall not be considered a defect under the Warranty.

3© Munters Corporation, August 2023 QM1243r0
Index
Chapters Page
1. Unpacking the Equipment 4
1.1 Parts List 4
1.2 Fan Dimensions 4
2. Electrical Wiring 5
2.1 Recommended Wire Routing 6
2.2 Determining Drive Type for wiring 7
2.3 V1000 Drive Wiring 8
2.4 GA500 Drive Wiring 12
3. Operation and Maintenance 16
4. Troubleshooting 17
5. Exploded View and Parts List 18

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1.1 Parts List
Unpacking the Equipment 1.
1.2 Fan Dimensions
FRONT VIEWSIDE VIEW
Each Fan includes:
1 – Munters Drive Fan
Before beginning installation, check the overall condition of the equipment. Remove packing materials, and
examine all components for signs of shipping damage. Any shipping damage is the customer’s responsibility and
should be reported immediately to your freight carrier.
17⅜”
78¼” O.D. - Dia.
90¾” O.D. - Dia.
97¼”
79¼” O.D. - Dia.
76¼” I.D. - Dia.
Fan Specifications:
Hertz: 60
Voltage: 460VAC
Phase: 3
Weight: 400 lbs. [182 Kg]
If any of the following accessories were purchased, refer to the corresponding manual for installation instructions:
74GK - Guard Kit - QM1239r1
FH1707 - Free Hanging Hanger Kit - QM1247r0
FH1709 - Pipe Hanging Kit - QM1249r0
1.3 Fan Accessories

5© Munters Corporation, August 2023 QM1243r0
Electrical Wiring 2.
All wiring should be installed in accordance with National, State, and Local electrical codes.
Fans used to ventilate livestock buildings or other rooms where continuous air movement is
essential should be connected to individual electrical circuits, with a minimum of two circuits
per room. For electrical connection requirements, refer to diagram on motor nameplate and to
information enclosed with the Munters environmental control to be used. After wiring check
for proper motor rotation.
Three Phase Fans: motor overload protection should be provided for each fan. A three-pole motor starter or
slow blow motor fuses must be used. See Figure 13.
NOTE: A safety cut-off switch should be located adjacent to each fan.
KEY:
L1=Line 1
L2=Line 2
L3=Line 3
G=Ground
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             
  
 
 

 
 

         
      
    !   
 
 
 
 
 "
 "
 "
 "
Figure 13
Three Phase - Motor Overload Protection with Disconnect
     #  $  %
  & # 
!        
WARNING
'
High Voltage, disconnect power
before servicing.

© Munters Corporation, August 2023
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Electrical WiringChapter 2
As the power cable exits the Munters Drive Box form a drip loop and then run power cable up along
strut and "Zip" tie the cable to strut to prevent cable from getting tangled in the propeller. See Figure 1.
Then run the cable out of fan to circuit breaker or control panel. (Continued on next page).
Figure 1
2.1 Recommended Wire Routing:
Electrical Cable
Munters Drive Box

7 Munters Corporation, August 2023 QM1243r0
Electrical WiringChapter 2
2.2 Determining Drive type for wiring
To access the Drive, loosen the (4) screws in the cover of the Munters Drive box to access the terminals
inside to connect power and other cables. See Figure 2A. If your drive looks like Figure 2B, then
proceed to the wiring section starting on Page 8. See Figure 2B. If your drive looks like Figure 2C, then
proceed to the wiring section starting on Page 12. See Figure 2C. The Munters Drive is prewired to the
Motor.
Cover Screw (captured)
Munters Drive cover
Munters Drive Box
Munters Drive Motor
Figure 2A
WARNING
(
High Voltage, disconnect power
before servicing.
***WARNING***
Only the Cover of the Blue Box
is designed to be removed. It
has captured screws that remain
in the cover. The Base of Blue
Box and Heat Sink must not be
removed from back of motor.
Removing Base or Heat Sink from
motor will void the warranty.
Any water or other damage to
the controller will not be covered
if the either is removed.
Figure 2C
GA500 Drive proceed to page 12
Figure 2B
V1000 Drive proceed to page 8

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Electrical WiringChapter 2
Run the 3 phase power cable through watertight fitting into the Munters Drive box and connect to the terminals
"R/L1, S/L2, T/L3" and Ground in the box. See Figure 3. The Munters Drive is prewired to the Motor.
2.3 V1000 Drive Wiring
Figure 3
460V
3 Phase
Power Supply
Prewired
to Motor
Three Phase Power connection:
To operate the fan continuously with no control, provide a Jumper wires between terminals 'S1' and 'SC'.
See Figure 4. Do not remove the Factory Installed Jumper.
Fan Operation with No Control - V1000
Jumper wire Figure 4
Factory Installed Jumper
Do Not Remove.
***** NOTE *****
Power to the Drive must be within
-4%, +8% of nominal voltage.
Munters Recommended;
Absolute Minimum Voltage = 440V
Absolute Maximum Voltage = 500V
Munters Recommends Line to Line
Voltage Unbalance to be 1% or less
per NEMA MG-1-1998. Absolute
maximum unbalance is 1.5%.

9 Munters Corporation, August 2023 QM1243r0
Electrical WiringChapter 2
To operate the fan On/Off with a control, wire an 'ON' command from the 'SC' terminal to the input relay
in the control and from the output of the control relay to the 'S1' terminal. See Figure 5. Do not remove the
Factory Installed Jumper.
Fan Operation On/Off with Control - V1000
Figure 5
To operate the fan Off/Low/High with a control, connect a wire from ‘SC’ terminal to the input side of the ‘ON’
relay in the control, then install a jumper from the input side of the ‘ON’ relay to the input side of the ‘LOW’ relay
in the control. Then connect a wire from ‘S1’ terminal to the output side of the 'ON' relay and then connect a wire
from the ‘S7’ terminal to the ouput side of the ‘LOW’ relay. See Figure 6. Do not remove the Factory Installed
Jumper.
Fan Operation Off/Low/High - V1000
Figure 6
‘ON’
Relay
‘LOW’
Relay

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Electrical WiringChapter 2
To operate the fan Off/Variable with a 10-0V Signal, wire an ‘ON’ command from the ’SC’ terminal to the
input relay in the control and from the output of the control relay to the ‘S1’ terminal. Then connect wires
from the 10-0V output in the control to the 'A1' and 'AC' terminals in the Munters Drive Box. The '+' output
in the control shoud go to 'A1' and the ' - ' output should go to 'AC'. See Figure 7. Do not remove the
Factory Installed Jumpers.
Fan Operation Off/Variable with 10-0V Signal - V1000
Figure 7
+ -
10-0V Output In Control
***NOTE***
All Low Voltage wire
must be shielded
cable. i.e. Belden
8770 or equivalent.
To operate the fan Off/Variable with a signal from a potemtiometer, wire an ‘ON’ command from the ’SC’
terminal to the input relay in the control and from the output of the control relay to the ‘S1’ terminal. Then
connect wires from the Potentiometer as follows, connect ' - ' to 'AC', connect 'L' to 'A1' and connect '+' to '+V'.
See Figure 8. Do not remove the Factory Installed Jumpers.
Fan Operation Off/Variable with Potentiometer - V1000
Figure 8
L + -
Input from Potentiometer
***NOTE***
All Low Voltage wire
must be shielded
cable. i.e. Belden
8770 or equivalent.

11 Munters Corporation, August 2023 QM1243r0
Electrical WiringChapter 2
The Munters Drive uses a Normally Closed circuit for alarm connections. To connect a control to the
Normally Closed output make appropriate connecions from the control to 'MB' and 'MC' terminals.
See Figure 9. Do not remove the Factory Installed Jumbers.
Alarm Connections - V1000
Figure 9
NC COM

© Munters Corporation, August 2023
12 QM1243r0
Electrical WiringChapter 2
Run the 3 phase power cable through watertight fitting into the Munters Drive box and connect to the terminals
"R/L1, S/L2, T/L3" and Ground in the box. See Figure 10. The Munters Drive is prewired to the Motor.
2.4 GA500 Drive Wiring
Figure 10
460V
3 Phase
Power Supply
Prewired
to Motor
Three Phase Power connection:
To operate the fan continuously with no control, provide a Jumper wires between terminals 'S1' and 'SN'.
See Figure 11. Do not remove the Factory Installed Jumpers.
Fan Operation with No Control - GA500
Jumper wire Figure 11
Factory Installed Jumper
Do Not Remove.
***** NOTE *****
Power to the Drive must be within
-4%, +8% of nominal voltage.
Munters Recommended;
Absolute Minimum Voltage = 440V
Absolute Maximum Voltage = 500V
Munters Recommends Line to Line
Voltage Unbalance to be 1% or less
per NEMA MG-1-1998. Absolute
maximum unbalance is 1.5%.

13 Munters Corporation, August 2023 QM1243r0
Electrical WiringChapter 2
To operate the fan On/Off with a control, wire an 'ON' command from the 'SN' terminal to the input relay
in the control and from the output of the control relay to the 'S1' terminal. See Figure 12. Do not remove
the Factory Installed Jumpers.
Fan Operation On/Off with Control - GA500
Figure 12
To operate the fan Off/Low/High with a control, connect a wire from ‘SN’ terminal to the input side of the ‘ON’
relay in the control, then install a jumper from the input side of the ‘ON’ relay to the input side of the ‘LOW’ relay
in the control. Then connect a wire from ‘S1’ terminal to the output side of the ‘ON’ relay and then connect a
wire from the ‘S7’ terminal to the ouput side of the ‘LOW’ relay. See Figure 13. Do not remove the Factory
Installed Jumper.
Fan Operation Off/Low/High - GA500
Figure 13
‘ON’
Relay
‘LOW’
Relay

© Munters Corporation, August 2023
14 QM1243r0
Electrical WiringChapter 2
To operate the fan Off/Variable with a 10-0V Signal, wire an ‘ON’ command from the ’SN’ terminal to the
input relay in the control and from the output of the control relay to the ‘S1’ terminal. Then connect wires
from the 10-0V output in the control to the 'A1' and 'AC' terminals in the Munters Drive Box. The '+' output
in the control shoud go to 'A1' and the ' - ' output should go to 'AC'. See Figure 14. Do not remove the
Factory Installed Jumpers.
Fan Operation Off/Variable with 10-0V Signal - GA500
Figure 14
- +
10-0V Output
In Control
To operate the fan Off/Variable with a signal from a potemtiometer, wire an ‘ON’ command from the ’SN’
terminal to the input relay in the control and from the output of the control relay to the ‘S1’ terminal. Then
connect wires from the Potentiometer as follows, connect ' - ' to 'AC', connect 'L' to 'A1' and connect '+' to 'V'.
See Figure 15. Do not remove the Factory Installed Jumpers.
Fan Operation Off/Variable with Potentiometer - GA500
Figure 15
- L +
Input from
Potentiometer
***NOTE***
All Low Voltage wire
must be shielded
cable. i.e. Belden
8770 or equivalent.
***NOTE***
All Low Voltage wire
must be shielded
cable. i.e. Belden
8770 or equivalent.

15© Munters Corporation, August 2023 QM1243r0
Electrical WiringChapter 2
The Munters Drive uses a Normally Closed circuit for alarm connections. To connect a control to the
Normally Closed output make appropriate connecions from the control to ‘MB’ and ‘MC’ terminals.
See Figure 16. Do not remove the Factory Installed Jumbers.
Alarm Connections - GA500
Figure 16
NC COM
To operate the fan with Modbus, wire an ‘ON’ command from the ’S1’ terminal to the input relay in the
control and from the output of the control relay to the ‘SN’ terminal. Then connect wires from the Modbus
output in control to the 'D+', 'D-' and 'AC' terminals and the 'S2' terminal if required in the Munters Drive Box.
See Figure 7. Do not remove the Factory Installed Jumpers.
2.7 Fan Operation with Modbus
Figure 7
?? ?? ??
Modbus Connections
***NOTE***
All Low Voltage wire
must be shielded
cable. i.e. Belden
8770 or equivalent.

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16 QM1243r0
Operation and Maintenance 3.
INITIAL START-UP: With electrical power off, verify that the fan propeller turns freely
and that all fasteners are secure. Turn on electrical power and confirm that the fan
operates smoothly.
TEMPERATURE ADJUSTMENTS: Set the fan control to the temperature shown on your
ventilations system drawing, or to a value which will provide the desired environmental
conditions.
3.1 Operation
WARNING
)
Disconnect Power
Before Servicing
WARNING
)
Moving Parts, Disconnect
Power Before Servicing.
WARNING
)
Do Not Power Wash
Electrical Devices.
3.2 Maintenance
The following inspection and cleaning procedures should be performed monthly:
1) INSPECT PROPELLER: Check that propeller is secure on prop shaft or motor shaft
and that there are no signs of damage. The blades are of a self-cleaning design
and should not require maintenance.
2) CLEAN regularly for best results:
• FAN MOTOR: Remove any dust accumulation from motor using a brush or
cloth. (DO NOT use a pressure washer). A clean motor will run cooler and last
longer. At the same time, verify that the motor is secure in its mount.
• GUARD: Clean any dust or feathers from fan guards using a brush. Dirty
guards can reduce airflow.
3) CHECK FASTENERS: For safety, all fasteners should be inspected 1 month after
initial operation and yearly thereafter. Tighten any loose connections.
4) INSPECT FAN CONTROL: With power disconnected, inspect all electrical
connections. Wiring should be secure and in good condition. Remove any dust
build-up from control case and sensor using a soft brush or cloth.
NEVER CLEAN ELECTRICAL EQUIPMENT WITH A PRESSURE WASHER!

17© Munters Corporation, August 2023 QM1243r0
Troubleshooting 4.
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
• Fan Not Operating • Fan control set above room
temperature
• Blown Fuse or open circuit breaker
• Propeller blade contacting fan
housing
• Fan control defective (i.e. Farm
Premium, etc.)
• Set to a lower temperature
• Replace fuse or reset breaker
• Realign motor in fan housing
• Repair or replace control
• Fan Does Not Start
Caution: There is a 10 second
delay for the fan to start when
an 'On' command is present.
• Munters Drive motor/controller
issue
1. Verify AC voltage is present at fan.
2. Turn AC power off to fan for 1 minute
3. Verify Prop turns freely
a. If not contact Munters Product Support
b. If it turns freely go to next step
4. Turn AC power back on to fan
a. If starts up and runs, fan OK
•Periodically observe fan to verify it is still running
•If it continues to run, fan is OK
•If fan stops, look through clear window in drive
cover to check what drive display reads.
Contact Munters Product Support
b. If fan tries to start but stops, look through clear
window in drive cover to check what drive display
reads. Contact Munters Product Support
c. If fan doesn't try to start, verify 'On' command
signal is present at circuit board. Also, slide the
switch on the circuit board to the 'On' position.
• Fan Operating -
Insufficient Airflow
• Excessive Noise
• Excessive Vibration
• Shutter or Damper door jammed
• Guard dirty/clogged
• 10-0V signal set incorrectly
• Propeller blade contacting fan
housing
• Motor loose on mount
• Propeller damaged
• Clean shutter or damper door
• Clean guard
• Check and adjust 10-0V signal
• Sand fan housing to remove high spot
• Tighten fasteners
• Replace propeller
4.1 Troubleshooting
WARNING
*
Disconnect Power
Before Servicing
WARNING
*
Moving Parts, Disconnect
Power Before Servicing.

© Munters Corporation, August 2023
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Exploded View 5.
+ , - . / 0 , 0 1 2 3 4 2 5 6
- 7 8 9 : ; , : 2 < = , > ?
1 FP1874 Propeller, BD, 3-blade, 1.1875” Bore, Keyed, GZ 1
2 FH2375 Assembly, Orifice Panel with Struts, FG/GZ 1
3 FP2066 Hub, Prop Adapter, 1.188”D. x 2.875”L., w/ Keyway, ZP 1
4 FM1466-CX74HO
Assembly, Motor and Drive, Prgmd, CX74, 460V 1
5 FH2574 Bracket, Spacer, MD G2 Max, CX74 Fan, GZ 2
6 FH2573 Bracket, Mounting, MD G2 Max, CX74 Fan, CTD-STEEL, BLK 2

19 Munters Corporation, August 2023 QM1243r0
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© Munters Corporation, August 2023
20 QM1243r0
Munters Europe AB, Isafjordsgatan 1, P.O. Box 1150, SE-164 26 Kista, Sweden. Phone [phone], Fax [phone].
Munters Corporation 2691 Ena Drive Lansing, MI 48917 U.S.A. Phone [phone], Fax [phone]
www.munters.us
Australia Munters Pty Limited, Phone [phone], Brazil Munters Brasil Industria e Comercio Ltda, Phone [phone], Canada/US Munters
Corporation Lansing, MI Phone [phone], China Munters Air Treatment Equipment (Beijing) Co. Ltd, Phone [phone], Denmark Munters A/S,
Phone [phone], India Munters India, Phone [phone], Indonesia Munters, Phone [phone], Italy Munters Italy S.p.A., Chiusavecchia,
Phone [phone], Japan Munters K.K., Phone [phone], Korea Munters Korea Co. Ltd., Phone [phone], Mexico Munters Mexico, Phone
[phone], Russia Munters AB, Phone [phone], Singapore Munters Pte Ltd., Phone [phone], South Africa and Sub-Sahara Countries
Munters (Pty) Ltd., Phone [phone], Spain Munters Spain S.A., Phone [phone], Sweden Munters AB, Phone [phone], Thailand
Munters Co. Ltd., Phone [phone], Turkey Munters Form Endüstri Sistemleri A.Ş, Phone [phone], USA Munters Corporation Lansing, MI Phone
[phone], Vietnam Munters Vietnam, Phone [phone], Export & Other countries Munters Italy S.p.A., Chiusavecchia Phone [phone]
CX74 Circulation Fan with Munters Drive is developed and produced by Munters Corporation, Lansing, Michigan U.S.A. 1-800-227-2376