Munters WM54K User manual

1© Munters Corporation, September 2019 QM1233r0
Instruction Manual
WM Fiberglass Wall Mount Fan
with Damper Door - 1-Pack Quick Kit
Models: WM54xKxCB
WM54K
Wall Mount Fan
with Damper Door
1-Pack Quick Kit

© Munters Corporation, September 2019
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Thank You:
Thank you for purchasing a Munters Wall Mount Fan with Damper. 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.
WM54K Fiberglass Wall Mount Fan with Damper
Instructions for Use and Maintenance

3© Munters Corporation, September 2019 QM1233r0
Index
Chapters Page
1. Unpacking the Equipment 4
1.1 Parts List 4
1.2 Fan Dimensions 6
1.3 Tools for Installation 6
2. Installation Instructions 7
2.1 Wall Framing 7
2.2 Fan Assembly 8
2.3 Motor Mounting 10
2.4 Cone Installation 16
3. Electrical Wiring 22
3.1 Recommended Wiring 23
4.Operation 24
5.Maintenance 25
6.Winterizing 27
6.1 Winterizing 27
6.2 Winter Weather Protection 27
7.Troubleshooting 28
8. Exploded View and Parts List 29-31

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1.1 Parts List
Unpacking the Equipment 1.
Each Crate Includes
1 – 54” Orifice Panel, Fiberglass Fan, Sub-Assembly
1 – Motor
1 – Drip Shield, AL
4 – Cone Sections, PL
1 – Cone Guard
1 – Inlet Guard
4 – Cone/Strut Mounting Brackets, Galvanized
1 – Motor Mount Stiffener Bracket, Galvanized
1 – Bulk Parts Package (BK1151)
BK1151 – Bulk Parts Package for WM54K
1 – Motor Base Bracket, Powder Coated
1 – Belt Tensioner Bracket, Powder Coated
1 – Motor Sheave
1 – V-Belt, A-Section
1 – 3” Idler Pulley, A-Section C.I., Blue
1 – Rotary Tensioner Arm, AL
1 – Hardware Package (HP1177)
1 – Coated Cable with Ferrule, 100”L.

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[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]
[J]
[K]
[L]
[M]
[N]
Unpacking the EquipmentChapter 1
HP1177 – Hardware Package for 1 – WM54K
ID Qty. Cat. No. Description
[A] 2 KW3011 5⁄16” x 1¼”O.D. Flat Washer, SS
[B] 1 KS1931 M10-1.5 x 25mm Hex Bolt, ZP
[C] 1 KW3509 10mm Splitlock Washer, ZP
[D] 16 KS1007 5⁄16” x 1.25” Hex Head Bolts, SS
[E] 4 KS1029 5⁄16” x 1.75” Hex Head Bolts, SS
[F] 3 KS1075 5⁄16” x 2.75” Hex Head Bolts, SS
[G] 31 KN0704 5⁄16” SRTD Flange Nuts, SS
[H] 1 KS2463 1⁄4” x1.5” HEX Lag Screw,ZP
[J] 1 AC0211 & AC0212 Azuma Bolt & Nut, Blue PL
[K] 1 KS1046 M10-1.5 x 50mm Hex bolt, ZP
[L] 8 FH1968 1-Hole Pivoting Shutter Clip, BLK PL
[M] 2 AC1381 1⁄8” Dia. Cable Clamp, ZP
[N] 2 KX1158 Hole Plug, 0.73”-0.76” Dia., BLK PL

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1.2 Fan Dimensions
Fan Specifications: 60Hz shown (50Hz available)
Power: 115/230 VAC* or 208-230/460 VAC
Phase: 1 or 3
*Available voltages vary depending on HP
Unpacking the EquipmentChapter 1
1.3 TOOLS REQUIRED FOR INSTALLATION
10mm [3⁄8”] Socket
13mm [½”] Socket
17mm [11⁄16”] Socket or Wrench
27mm [11⁄16”] Wrench
3⁄8” Socket
Phillips Screwdriver, #3 Size
5⁄32” Hex Wrench
Wire Cutting Pliers
Dimensions:
Size A B C* D - Dia. E F Wall Openings
54” 60”W. x 60” H. 49” 61⁄2”66
5⁄16”3 3⁄16”4 3⁄4”56 1⁄2”W. x 561⁄2”H.
Wall Opening (W.O.)
D - Dia.
F
A
AB
Guard
E
C
*Dimension varies depending on wall construction and motor configuration.

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2.1 Wall Framing
Step 1
Construct framed opening to correct size according to the Wall Opening listed in Chart A below.
See Figure 1A and 1B. When installing exterior sheet metal before fan, leave 2” of the framing exposed on all
sides so the orifice can mount flush to the frame.
Installation Instructions 2.
Minimum Spacing
'Z'
Chart A
Wall Opening
(W. x H.)
Fan Dia.
12” recommended; 3½” minimum
54” 56½” W. x 56½” H.
Center To Center
Dimension
60” Minimum
Figure 1B 4 x 4 Post Construction - Elevation View
Ceiling
Framing
H
(See chart A)
12"
W
(See chart A)
See minimum
spacing notes in
Chart A
Z
2 x 8 Header boards
4 x 4 or
4 x 6 Posts
2 x 4
Framing
2 x 8 Banner boards
Ceiling
4 x 4 or 4 x 6 Posts
W
(See chart A)
H
(See chart A)
Figure 1A Frame Construction
561»2”W.
Top View
60”W. O.C.
W x H Wall Opening
Sheet Metal Opening
Stud Wall

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Step 2A
Remove the BK1151 and Motor from the front of the crate. See Figure 2A.
Figure 2A
Installation InstructionsChapter 2
Step 2B
Remove all the other loose parts from the back of the crate. See Figure 2B.
Figure 2B
BK1151
Motor
The fan can either be installed on the wall before the drive system is installed or
the drive system can be installed while the fan is in the crate.
2.2 Fan Assembly

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Step 3
Carefully turn the crate onto its side, so that the drain holes in the orifice are at the bottom. See Figure 3.
Drain Holes
Step 4
Attach the Motor Base Bracket and the Belt Tensioner Bracket to the Tube Strut using (3) Long Bolts [F], (2)
Washers [A] and (3) Nuts [G]. See Figure 4.
Figure 3
Figure 4
Installation InstructionsChapter 2
Bolt [F]
Washer [A]
Nut [G]
Motor Base Bracket
Belt Tensioner Bracket

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Motor Key
Motor
Motor Sheave
Step 5
Attach the 3” Idler Pulley to the Tensioner Arm using Bolt [K]. Then attach the Tensioner/Pulley Assembly to
the Tensioner Bracket using Bolt [B] and Splitlock Washer [C]. Finger tighten only at this time. See Figure 5.
Step 6
Find the Key provided with the Motor and place it in the Keyway on the motor shaft. Place the Motor
Sheave on the Motor shaft with the hub facing towards the motor. See Figure 6. ONLY tighten the set
screw enough to hold the Sheave in place at this time. See Figure 6.
Figure 5
Figure 6
Installation InstructionsChapter 2
Bolt [B]
Splitlock Washer [C]
Tensioner Pulley
Tensioner Arm
Bolt [K]
2.3 Motor Mounting

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Installation InstructionsChapter 2
Step 7
Set Motor on Motor Bracket so Motor base rests against lower Motor Bracket flange. Align middle and front
slots in Motor base with holes in Motor Bracket. See Figure 7.
Step 8A
Secure Motor to Motor Bracket and Motor Bracket Stiffener using (4) Short Bolts [D] and Nuts [G]. The
rear upper bolt is where Motor Bracket Stiffener is attached. See Figure 8A.
Figure 7
Stiffener
Short Bolts [D]
Nuts [G]
Figure 8A
Holes in Motor Bracket
Front and Middle Slots
Lower Motor Bracket Flange

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Figure 8B
Stiffener
Step 8B
Using channel locks and/or a hammer twist the Motor Bracket Stiffener so that the holes in the bracket lay
flat against the framing. Then secure the bracket to the framing using (1) Lag Screw [H]. See Figure 8B.
Framing
Lag Screw [H]
Installation InstructionsChapter 2

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Step 9
Use a straight edge or level to check alignment of the Propeller Sheave, Tensioner Pulley and the Motor
Sheave. If needed, adjust position of Motor Sheave so the 3 pulleys line up. Once Motor Sheave is
aligned tighten set screw to 75 In-lbs [9 N-m] torque. See Figure 9.
Figure 9
Level
Installation InstructionsChapter 2
Step 10A
Slide V-belt over Propeller and install by wrapping it around 2 smaller pulleys and starting it over
larger Sheave. Continue rolling it onto the larger Sheave until it fits into groove. See Figure 10A.
If desired the 2 drain holes in the Orifice Panel can be plugged using (2) Hole Plugs [NN].
Figure 10A
Motor Sheave
Tensioner Pulley
Propeller Sheave
Drain Holes

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Installation InstructionsChapter 2
Step 10B
To adjust belt tensioner to proper setting, loosen 10mm bolt (using 17mm end wrench) to allow tensioner
arm to rotate. Working from inlet/motor side of fan, place a 27mm (11⁄16”) wrench onto the hex on the
tensioner. Turn wrench clockwise until the single mark on base of belt tensioner is aligned with Mark 2 on
tensioner arm. Hold at this setting and tighten the 10mm bolt to 40 ft.lbs. [54 N-m] torque. See Figure 10B.
Figure 10B
Mark 2 on Tensioner Arm
Hex on Tensioner Arm
10mm Bolt
Single Mark on Base
Step 11A
Attach Drip Shield to bottom of framed opening using (3) Barn Screws (Not Provided). See Figure 11A and 11B.
If a 4” wall is used a support board must be installed as shown in Figure 11B. Be sure not to deform Drip Shield
when installing screws.
Figure 11A
Barn Screw
(Not Provided)
Drip Shield
Figure 11B
Barn Screw
(Not Provided)
Drip Shield Drip Shield
Barn Screw
(Not Provided)
Support board

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Step 12
Locate Drain hole in Orifice Panel. This is bottom of Fan. Set bottom edge of fan on Drip Shield ledge
and center panel on opening. Secure Fan to wall using (16) Barn Screws (Not Provided).
See Figure 12A and 12B.
Installation InstructionsChapter 2
Figure 12A
Step 13
Find Coated Cable and insert end opposite ferrule into small hole in upper plate of Main Frame. Pull
it through until ferrule stops at plate. See Figure 13.
Figure 13
Hole in Main Frame
Ferrule
Figure 12B
Latch Pin Orifice panel
Barn Screw (Not Provided)
Drip Shield Ledge

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Step 14
Place all 4 cone sections on a flat surface with tabs from one facing slots of the next. See Figure 14A.
Curl up tab end of first cone section and insert tabs up into slots in the next cone section. A mallet may
be needed to seat slots over tabs completely. See Figure 14B. Repeat this until all 4 cone sections are
connected and laying flat.
Installation InstructionsChapter 2
Step 15A
Fasten each of the joints in the single outer hole using (1) Short Bolt [D] and Nut [G], with the nut on the
side with the tabs. At the inner pair of holes of each joint attach (1) Cone Support Bracket to the inner
hole using (1) Short Bolt [D] and Nut [G] with the bolt head on the side with the tabs. See Figure 15A.
Figure 14A
Figure 15A
Nut [G]
Figure 14B
Outer Hole Short Bolt [D]
Short Bolt [D]
Inner holes
Nut [G]
Cone Support Bracket
2.4 Cone Installation

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Installation InstructionsChapter 2
Step 15B
Stand cone sections on end and curl ends around to form cone with Cone Support Bracket on outside and tabs
on inside. Insert remaining tabs into slots so tabs are inside cone and fasten final joint using (1) Short Bolt [D]
and Nut [G], with nut on inside of cone. At the inner pair of holes attach (1) Cone Support Bracket to the inner
hole using (1) Short Bolt [D] and Nut [G] with bolt head on inside of cone. See Figure 15B.
Short Bolt [D]
Cone Support Bracket
Nut [G]
Short Bolt [D]
Nut [G]
Figure 15B

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Installation InstructionsChapter 2
Figure 16A
Step 16A
Install cone onto fan by putting top of cone over top of fan. The hole in tab of one cone section should
slide down over the Frame Pin in the Main Frame assembly. Allow remainder of cone to slide over orifice
panel making sure Cone Support Brackets remain on outside of cone. See Figure 16A.
Frame Pin
Hole in Tab of Cone Section
Step 16B
Place end of Cone Support Bracket with slot over bolt holding Cone/Strut Mounting Bracket to the orifice
and secure with Nut [G]. See Figure 16B.Secure Cone to Fan installing Medium Bolt [E] through the
remaining hole in the Cone Support Bracket and fastening with Nut [G]. A long screwdriver may be
needed to help align the holes through Cone Support Bracket, Cone, Main Frame and Orifice. Repeat
process for all 4 Cone Support Brackets. See Figure 16B.
Figure 16B
Nut [G]
Medium Bolt [E]
Nut [G]
Use this hole for WM54K

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Installation InstructionsChapter 2
Step 17
Insert guard into cone with the eyelets facing you. Install eyelets over bolts already installed in cone and fasten
with Nut [G]. Secure remaining eyelets using Short Bolt [D] and Nut [G]. See Figure 17.
Nut [G]
Nut [G]
Previously installed - Bolt and Nut
Step 18
Loop Coated Cable that was installed in a previous step, around the lower, middle joint in guard and fasten to
itself with Azuma Bolt & Nut [J]. Make sure cable is pulled snug. See Figure 18.
Figure 17
Figure 18
Azuma Bolt & Nut [J]
Short Bolt [D]
Coated Cable
Note:
When installing cable in
temperatures BELOW 60°F,
leave cable slightly slack
(do not overtighten).

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Installation InstructionsChapter 2
Step 19
If Fans are to be installed 60” O.C., cut the 3 o’clock and 9 o’clock guard wire in the position shown. Push
the side of the cone in as far as possible and fasten the cut guard wire to the attached guard wire using
Clamp [M]. See Figure 19.
Cut Guard Wire Here
Clamp [M]
Figure 19
Step 20A
Cut a section of the inlet guard out to fit over the motor as shown below for the appropriate fan. When cutting
the guard wires make sure to cut them as close to the other wires as possible. See Figure 20A.
Figure 20A
8” 12”
14”
2”
60”
62”