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*
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© 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

© Munters Corporation, August 2023
4QM1243r0
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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
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Figure 13
Three Phase - Motor Overload Protection with Disconnect
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  & # 
!        
WARNING
'
High Voltage, disconnect power
before servicing.

© Munters Corporation, August 2023
6QM1243r0
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

© Munters Corporation, August 2023
8QM1243r0
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

© Munters Corporation, August 2023
10 QM1243r0
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.