Munters WF50 Series User manual

1© Munters Corporation, December 2019 QM1079r12
Instruction Manual
WF50 Fan with Dragonfly Damper Door
Models: WF501VxCD • WF5015VxCD
WF50 Fan
with Dragonfly
Damper Door
Galvanized

© Munters Corporation, December 2019
2QM1079r12
WF50 Fan with Dragonfly Damper Door
Instructions for Use and Maintenance
Thank You:
Thank you for purchasing a Munters WF50 Dragonfly Fan. 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 insure 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, December 2019 QM1079r12
Index
Chapters Page
1. Unpacking the Equipment 4
1.1 Parts List 4
1.2 Fan Dimensions 5
2. Installation Instructions 6
2.1 Installation 6
3. Electrical Wiring 8
3.1 Wiring 8
3.2 Recommended Wire Routing 9
4. Operation 10
5. Maintenance 11-12
6. Winterizing 13
6.1 Winterizing 13
6.2 Winter Weather Protection 13
7. Troubleshooting 14
8. Exploded View and Parts List 16-17

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1.1 Parts List
Unpacking the Equipment 1.
[A]
[B]
[C]
[D]
[F]
[J]
[O]
[P]
Each Fan includes:
1 – 50” Belt Drive Fan
1 – Dragonfly Door Assembly
4 – Cone Sections (2 side, 2 top/bottom
1 – Cone Guard
1 – Inlet Guard
1 – Hardware Package (HP1119):
HP1119 – for WF50 Dragonfly Fans
ID Qty. Cat. No. Description
[A] 12 KS2463 1⁄4” x 1.5” Hex Lag Screw, ZP
[B] 24 KS1153 1⁄4”-20 x ¹⁄₂” SRTD Flange Head Bolt, ZP
[C] 14 KS1151 1⁄4”-20 x ³⁄₄” SRTD Flange Head Bolt, ZP
[D] 8 KR1060 1⁄8”D x 1⁄16 -1⁄8” Grip Pop Rivet, SS
[F] 38 KN0730 1⁄4”-20 SRTD Flange Nut, ZP
[G] 12 KX1256 .32"IDx.75"ODx1"L. Spacer, Black, NY
[J] 8 KS2260 1⁄4”-20 x ³⁄₄” SRTDHXWSHR TEK Screw, ZP
[L] 2 FA1730 Tall Wing Brackets, GZ
[M] 2 FA1732 Short Wing Brackets, GZ
[N] 2 FA1733 Dragonfly Door Wings, PL
[O] 4 KX1043 5⁄16” Push-in Fasteners, NY
[P] 2 KX1470 Retainer Spring, SS
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. Fan is shipped complete with all accessories.
Not to Scale

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1.2 Fan Dimensions
Unpacking the EquipmentChapter 1
FRONT VIEWSIDE VIEW
C
E
B
D - Cone Width x Cone Height
D - Cone Width x Cone Height
Shutter
F
A - Mounting Flange
Fan Specifications: (50Hz available)
Hertz: 60 60
Voltage: 120/240VAC or 208-240/480VAC
Phase: 1 or 3
NOTE: Crate may contain Fan Accessories.
FAN
DIA. A B C
D
Cone Width x Cone Height
E
Above W.O.
F
Below W.O. G
Wall Opening
(W.O.)
50” 577⁄16” x 577⁄16” 105⁄16” 493⁄8” 591⁄2”W. x 64"H. 49⁄16” 41⁄2” 31⁄16” 541⁄2”W. x 541⁄2”H.
*Opening based on 2 x 4 framing.
Wall Opening (W.O.)
Wall Opening (W.O.)
G
Guard

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Installation Instructions 2.
2.1 Installation
Figure 1A
Ceiling
Framing
H. (See Chart A) 12"
W.
(See Chart A)
Chart A
Catalog
No.
A
2 x 4 Framing
B
Concrete Framing
WF50 55”W. x 561⁄4”H. 55”W. x 573⁄4”H.
Step 1
Construct the framed opening to correct size according to the Chart A
(below) and your fan size. See Figure 1A and 1B. If fan and housing is
to be framed into a 2 x 4 wall or concrete wall, See Figure 1A, 1B, 1C
and Chart A for details. For greater than 4" wall thickness,
See Figure 1D.
Recommended Clearance*
•Fan with outlet guard:
maintain 8" minimum
clearance on all sides
•Fan with discharge cone:
maintain 12" minimum
clearance on all sides
See Clearance
Recommended
Clearance,
upper right.
Figure 1B
2 x 4 Framing
A - 2 x 4 Wall Opening
2 x 4
B - Concrete Wall Opening
A - 2 x Wall Opening
3¹⁄₂"
Framing cut at
12° to match
fan housing.
Figure 1B
Concrete Framing
Figure 1D
Greater Than 4" Wall Thickness

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Step 2
Slide fan and housing into framed wall opening. See Figure 2 .
Installation InstructionsChapter 2
Figure 2
Figure 3A
54¹⁄₂"
¹⁄₄" x 1.5" Lag Screw [A]
54¹⁄₈"
Figure 3B
Step 3
Confirm that housing inside dimensions match those shown in
Figure 3A. Then secure housing to wall using (12) Lag Screws [F],
through holes in each mounting flange. See Figure 3B.
Step 4
Proceed to Installation Instructions for Discharge Cone,
Form QM1033 for 50" Fans.
NOTE:
This is NOT the
Wall Opening Size

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Electrical Wiring 3.
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.
Single Phase Fans: motor overload protection should be provided for each fan. A Circuit Breaker Switch or slow
blow motor type fuses must be used, See Figure 4A. See form QM1400 for proper size.
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 4B.
If a frequency drive (inverter) is used, confirm that motors are rated for inverter duty at the voltage used. Shielded
power cable between frequency drive and each motor is highly recommended. Installation of line reactors is
recommended to reduce voltage spikes and harmonic distortion. Supplemental motor overload protection is also
recommended.
NOTE: A safety cut-off switch should be located adjacent to each fan.
Figure 4A
Single Phase - Motor Overload Protection with Disconnect
(SY2000 or Equivalent)
120 or 240 VAC
Power Supply for
Fan
L1 (H)
L2 (N)
G
T1 (H)
T2 (N)
G
120 or 240 VAC
Power Out
to Fan
L1 (H)
L2 (N)
T1 (H)
T2 (N)
NOTE: Information in parenthesis refers to 120 VAC control.
Three Phase
Power Supply for
Fan
L1
L2
G
T1
T2
G
Three Phase
Power Out
to Fan Motor
L1
L2
T1
T2
L3 T3
L3 T3
Figure 4B
Three Phase - Motor Overload Protection with Disconnect
Safety cut-off
switch
Motor Starter
KEY:
L1=Line 1
L2=Line 2
L3=Line 3
H=Hot
N=Neutral
G=Ground
Circuit Breaker Switch
3.1 Wiring

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3.2 Recommended Wire Routing (two options):
Step 5
As the power cable exits the back of motor, form a drip loop and then run cable through side of fan
housing, through flexible conduit and into building. See Figure 5A and 5B.
Step 6
As the power cable exits the back of motor, form a drip loop and then run cable up through fan
housing and frame into wall cavity and into building. See Figure 6A and 6B.
Electrical WiringChapter 3
Step 7
Add flashing and/or caulk around completed housing on exterior side of building wall.
Figure 5A
Drip Loop
2"
Figure 5B
Drip
Loop
Figure 6A Figure 6B
Shutter Installation
Step 8
Insert shutter into fan by sliding the bottom flange of shutter into bottom shutter clips and pressing
shutter inward. See Figure 7A. Fasten shutter in place by rotating top and side shutter clips over
shutter flanges. See Figure 7B.
Figure 7A Figure 7B
Shutter Clip
Shutter Clip

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Operation 4.
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.
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.
Single Phase Fans: When variable speed controls are used, the fan's idle speed will need
to be set to the recommended minimum airflow rate. Refer to the procedures included with
each control. The table below provides airflow rates at various propeller speeds for fans
wired for 240 VAC.
Three Phase Fans:
1) The use of a quality frequency drive and the installation of line reactors is
recommended to reduce voltage spikes and harmonic distortion.
2) Minimum operating frequency of 30 Hz.
3) Will require three pole contractors with overload protection (by others).
4.1 Operation
WARNING
!
Disconnect Power
Before Servicing
WARNING
!
Moving Parts, Disconnect
Power Before Servicing.
WARNING
!
Moving Parts: Disconnect
Power Before Servicing.
WARNING
!
Do Not Power Wash
Electrical Devices.