Munters WM54K Instruction Manual

WM54K

Wall Mount Fan

Instruction Manual

with Damper Door

6-pack

WM Fiberglass Wall Mount Fan

with Damper Door - 6 pack

Models: WM54xKxCB-6PK

QM1078r1

1© Munters Corporation, September 2019

WM54K Fiberglass Wall Mount Fan with Damper

Instructions for Use and Maintenance

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 [e-mail].

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

.

2

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© Munters Corporation, September 2019

Index

Chapters Page

1. Unpacking the Equipment 4

2. Installation Instructions 7

2.2 Fan Assembly 8

2.4 Cone Installation 17

2.5 Motor Mounting 21

3. Electrical Wiring 26

4. Operation 28

1.1 Parts List 4

1.2 Fan Dimensions 6

1.3 Tools for Installation 6

2.1 Wall Framing 7

2.3 Damper Door Installation 11

3.1 Recommended Wiring 27

5. Maintenance 29

6. Winterizing 31

7. Troubleshooting 32

8. Exploded View and Parts List 33-35

6.1 Winterizing 31

6.2 Winter Weather Protection 31

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Unpacking the Equipment

1.1 Parts List

Each Crate Includes Parts to build 6 fans:

Each WM54K Fan Requires:

1 – Orifice Panel, Fiberglass
1 – Propeller
1 – Tube Strut, Powder Coated
1 – Motor
1 – Drip Shield, AL
1 – Main Frame Assembly, AL
1 – Door Assembly, PL
4 – Cone Sections, PL
1 – Cone Guard
1 – Inlet Guard
½ – Bulk Parts Package (BK1154) For 2 Fans

1.

BK1154 – ½ of Bulk Parts Package needed for 1 – WM54K

1 – Motor Base Bracket, Powder Coated
1 – Belt Tensioner Bracket, Powder Coated
4 – Cone Support Brackets, PC Type, Galvanized
4 – Cone/Strut Mounting Brackets, Galvanized
1 – V-Belt, A-Section
1 – Hub with Bearings and Shaft
1 – Motor Sheave, CI
1 – Prop Sheave, AL
1 – 3” Idler Pulley, A-Section C.I., Blue
1 – Rotary Tensioner Arm, AL
1 - Motor Mount Stiffener Bracket, Galvanized
2 – Tension Springs, 11.0”L./10.8”L., SS
1 – Hardware Package (HP1389)
1 – Coated Cable with ferrule, 100”L.
2 – Wing for Damper Door, HDPE, BLK

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© Munters Corporation, September 2019

HP1389 – Hardware Package for 1 – WM54K

ID Qty. Cat. No. Description

[B] 1 KS1901 6.3mm x 19mm Tapping Screw, ZP
[C] 4 KS1928 M8-1.25 x 25mm Hex Bolt, ZP (HP1382 only)
[D] 4 KW4906 M8 Star Lock Washer, BLK
[E] 4 KN1849 M8-1.25 x 8mm Hex Nut, ZP

[F] 4 KS1926 M6-1.0 x 30mm Hex Bolt, ZP
[G] 4 KW4901 M6 x 12mm Flat Washer, ZP
[H] 4 KN1855 M6-1.0 x 6mm Hex Nut, ZP

[J] 1 KS1931 M10-1.5 x 25mm Hex Bolt, ZP

[K] 1 KW3509 10mm Splitlock Washer, ZP

[L] 1 KN1860 M25-2.0 x 10mm Hex Nut, ZP
[M] 1 KX1130 Shaft Shield for Prop Sheave, AL
[N] 1 KX1208 40mm Cover Cap, Black PL

[R] 8 FH1968 1-Hole Pivoting Shutter Clip, PL
[T] 1 AC0211 & AC0212 Azuma Bolt & Nut, Blue PL
[X] 1 KS1046 M10-1.5 x 50mm Hex bolt, ZP

1 HK1001 Hardware Kit WM54K Fan Assembly, #1 of 2
1 HK1002 Hardware Kit WM54K Fan Assembly, #2 of 2

1 LB2647 Specification Label for WM54K

HK1001 – Hardware Kit for 1 – WM54K Fan

ID Qty. Cat. No. Description

[AA] 18 KS1007

[BB] 4 KS1029
[CC] 7 KS1075
[DD] 37 KN0704

[EE] 10 KW3011

5

⁄16”-18 x 1.25” SRTD Flange Head Bolts, SS

5

⁄16”-18 x 1.75” SRTD Flange Head Bolts, SS

5

⁄16”-18 x 2.75” SRTD Flange Head Bolts, SS

5

⁄16”-18 SRTD Flange Nuts, SS

5

⁄16” x 1¼”O.D. Flat Washer, SS

Unpacking the EquipmentChapter 1

[B]

[C]

[D]

[E]

[F]

[G]

[H]

[J]

[K]

[L]

[M]

HK1002 – Hardware Kit for 1 – WM54K Fan

ID Qty. Cat. No. Description

[FF] 4 KS2250 #10-16 x ½” TEK Screw, SS

[GG] 7 KS1400 #10-12 x

[HH] 1 KW3012 ¹⁄₄” x 1”O.D. Flat Washer, SS

[JJ] 2 AC1381

[KK]

[LL]

2 KX1158 Hole Plug, 0.73”-0.76” Dia., BLK PL
1 KS2463

1

⁄8” Dia. Cable Clamp, ZP

1

⁄4” x 1.5” HEX Lag Screw,ZP

[AA]

[BB]

[CC]

[DD]

[EE]

3

⁄4”, SLTDHX, Seal-Washer Screw, ZP

[FF]

[GG]

[HH]

[JJ]

[KK]

[LL]

[N]

[R]

[T]

[X]

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Unpacking the EquipmentChapter 1

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

AB

C

Wall Opening (W.O.)

F

E

A

D - Dia.

Guard

Dimensions:

Size A B C* D - Dia. E F Wall Openings

54” 60”W. x 60” H. 49” 6

1

⁄2”66

5

⁄16”3

3

⁄16”4

3

⁄4”56

1

⁄2”W. x 561⁄2”H.

6

1.3 Tools required for installation

10mm [3⁄8”] Socket

13mm [ ½”] Socket

17mm [11⁄16”] Socket or Wrench

27mm [1

36mm Socket or Wrench

3⁄8” Socket

Phillips Screwdriver, #3 Size

5⁄32” Hex Wrench

Wire Cutting Pliers

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*Dimension varies depending on wall construction and motor configuration.

1

⁄16”] Wrench

5

⁄16” Socket or Wrench

1

⁄8” Drill Bit

© Munters Corporation, September 2019

Installation Instructions

2.

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.

Chart A

Fan Dia.

54”

Framing

Wall Opening

(W. x H.)

56½” W. x 56½” H.

Ceiling

See minimum
spacing notes in
Chart A

12” recommended; 3½” minimum

Z

(see chart A)

Figure 1A Frame Construction

Minimum Spacing

'Z'

12"

W

H

Center To Center

Dimension

60” Minimum

Note:

Damper doors should
be carefully set aside
out of direct sunlight
until needed.

Stud Wall

(see chart A)

W x H Wall Opening

Sheet Metal Opening

Top View

2 x 8 Header boards

4 x 4 or
4 x 6 Posts

2 x 4
Framing

2 x 8 Banner boards

Figure 1B 4 x 4 Post Construction - Elevation View

W

(see chart A)

Ceiling

4 x 4 or 4 x 6 Posts

H

(see chart A)

561»2”W.

60”W. O.C.

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Installation InstructionsChapter 2

2.2 Fan assembly

Step 2

Place tube strut on saw horses or a flat work surface. The large center hole should be pointing horizontally.

Attach the Motor Base Bracket and the Belt Tensioner Bracket to the Tube Strut using (3) Long Bolts [CC],
(2) Washers [EE] and (3) Nuts [DD]. The Motor Bracket and the Tensioner Bracket share the middle hole.

See Figure 2A.

Tube Strut

Motor Base Bracket

Long Bolts [CC]

Washer [EE]

Nuts [DD]

Tensioner Bracket

Figure 2A

Step 2B

Attach the 3” Idler Pulley to the Tensioner Arm using Bolt [X]. Then attach the Tensioner Arm assembly to the

Tensioner Bracket using Bolt [J] and Splitlock Washer [K]. Finger tighten only at this time.

See Figure 2B.

Next attach the Specification Label to the Tube Strut as shown, and then mark the box for the appropriate
model fan.

Bolt [J]

Washer [K]

Label

Tensioner Arm

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Bolt [X]

Idler Pulley

Figure 2B

© Munters Corporation, September 2019

Step 3

Attach Prop Sheave to Hub using (4) Bolt [F], Washer [G] and Nut [H]. See Figure 3.

Prop Sheave

Hub

Washer [G]

Bolt [F]

Bolt [F]

Installation InstructionsChapter 2

Washer [G]

Nut [H]

Prop Sheave

Figure 3

Hub

Step 4

Rotate Tube Strut on saw horses so Motor Bracket is pointing up. Slide Shaft Shield [M] over hub shaft

as shown in Figure 4. Attach Sheave/Hub Assembly to Tube Strut using (1) Hex Nut [L] and tighten to
52 ft-lbs [70 N-m] torque. See Figure 4. Place Plastic Cover Cap [N] over Hex Nut and fasten in place
with (1) Tapping Screw [B]. See Figure 4. Set aside the Strut Assembly for use in a later step.

Tapping Screw [B]

Cap Cover [N]

Hex Nut [L]

Shaft Shield [M]

Hub Assembly

Figure 4

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Installation InstructionsChapter 2

Step 5

Place Orifice Panel on saw horses with the round orifice pointing up and place (1) Cone/Strut Mounting

Bracket in each corner of the Orifice Panel. See Figure 5.

Orifice Panel

Mounting Bracket

Figure 5

Step 6

Corners of Orifice Panel with 2 holes are corners where Strut Assembly attaches. Secure Strut Assembly using

(4) Long Bolts [CC], (6) Washers [EE] and (4) Nuts [DD]. In the opposite corners attach Cone/Strut Mounting
Bracket to the orifice using (1) Short Bolt [AA], Washer [EE] and Nut [DD]. See Figure 6.

Nuts [DD]

Washer [EE]

Drain Hole

Washer [EE]

Long Bolt [CC]

Nuts [DD]

Washer [EE]

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Short Bolt [AA]

Figure 6

© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 7

Attach Propeller to Hub Assembly using (4) Bolts [C], Washers [D] and Nuts [E]. Tighten bolts to 180 in-lbs.

of torque. See Figure 7.

Bolt [C]

Washer [D]

Propeller

Nut [E]

Figure 7

WM54K Shown

2.3 Damper Door Installation

Step 8

Slide Main Frame Assembly onto Orifice Panel with pin on Main Frame opposite the drain holes.
See Figure 8A. Line up 4 holes in Main Frame with holes in the Orifice and fasten using (4) TEK Screws [FF].

See Figure 8B.

Main Frame

Pin

Orifice Panel

Hole in orifice panel

TEK Screw [FF]

Drain Hole

Figure 8A Figure 8B

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11© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 9

Attach Drip Shield to bottom of framed opening using (3) Barn Screws (Not Provided). See Figure 9A and 9B.

If a 4” wall is used a support board must be installed as shown in Figure 9B. Be sure not to deform Drip Shield
when installing screws.

Barn Screw Barn Screw

Barn Screw
(not provided)

Drip plate

6” Wall

Drip Shield

Drip plate

Support board

4” Wall

Figure 9A Figure 9B

Step 10

Locate Drain Hole in Orifice Panel. This is the bottom of the Panel. Set bottom edge of panel on Drip Shield

ledge and center panel on opening. Secure Panel to wall using (16) Barn Screws (Not Provided).

See Figure10A and 10B.

Orifice Panel

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Drain Hole

Drip Shield ledge

Figure 10A Figure 10B

© Munters Corporation, September 2019

Barn Screws (Not Provided)

Installation InstructionsChapter 2

Step 11

Carefully remove folded door assembly from box. Open doors and lay them flat on solid surface with the

Munters Logo down. The Bottom of the doors has the Hinge Pin with the Nylon Washers. The Wing sits down
in the Groove of the upper right and lower left doors. For the WM54 the Wing will start just after the last
spring mounting dimple and follow the Groove. Make sure Wing is seated in bottom of Groove and fasten in
place using (3) Seal-Washer Screws [GG] per wing. Make sure Hinge Pins do not fall out. See Figure 11.

Spring Mounting Dimples

Groove in Door

Wing

Seal-Washer
Screw [GG]

Wing

Figure 11

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Installation InstructionsChapter 2

Step 12

Carefully turn doors over and pull upper Latch Pin down until the end is flush with top of doors. Make sure

Long Hinge Pin (bottom) does not fall out. See Figure 12.

Latch Pin

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Long Hinge Pin

Figure 12

© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 13

Being careful not to let pin fall out, set Doors into Main Frame with Hinge Pin in hole at bottom plate of
Main Frame and push top of Doors into place.

See Figure 13.

Door

Figure 13

Step 14

Separate doors and push them into closed position. Push Latch Pin up into place, then turn short leg of
Latch Pin into recess of door. Secure in place using Seal-Washer Screw [GG] and Flat Washer [HH].
Latch Pin should extend up through upper plate in Main Frame.

See Figure 14.

Latch Pin

Hinge Pin

Figure 14

Latch Pin Leg

Flat Washer [HH]

Seal-Washer Screw [GG]

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Installation InstructionsChapter 2

Step 15

Find Coated Cable and insert end opposite ferrule into small hole in upper plate of Main Frame. Pull it
through until ferrule stops at the plate.

See Figure 15.

Ferrule End

Hole in Main Frame

Figure 15

Step 16

On room side of each door drill an 1⁄8” dia. hole in each door through one of the dimples, as shown. For WM54
drill the 4th dimple from the center in both upper quadrants.

See Figure 16.

Drill 4th Dimple

16

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Figure 16

© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 17

From the inside attach each Tension Spring to hole in upper or lower plate of Main Frame using end of spring
with loop. Loop should hook through hole from the door side. Stretch spring and insert opposite end into hole
drilled in door previously.

See Figure 17.

Hole in upper plate

Drilled Hole in
Damper Door

Tension Spring

2.4 Cone Installation

Step 18

Place all 4 cone sections on a flat surface with tabs from one facing slots of the next. See Figure 18A.
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.
connected and laying flat.

Figure 17

See Figure 18B. Repeat this step until all 4 cone sections are

Figure 18A

Figure 18B

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Installation InstructionsChapter 2

Step 19A

Fasten each of the joints in the single outer hole using (1) Short Bolt [AA] and Nut [DD], 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) Bolt [AA] and Nut [DD] with the bolt head on the side with the tabs.

Nut [DD]

See Figure 19A.

Outer hole

Short Bolt [AA]

Short Bolt [AA]

Inner hole

Nut [DD]

Cone Support Bracket

Figure 19A

Step 19B

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 [AA]
and Nut [DD], 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 [AA] and Nut [DD] with bolt head on inside of cone.

See Figure 19B.

18

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Short Bolt [AA]

Cone Support Bracket

Nut [DD]

Short Bolt [AA]

Nut [DD]

Figure 19B

© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 20A

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.

Hole in Tab of Cone Section

Frame Pin

See Figure 20A.

Figure 20A

Step 20B

Place end of Cone Support Bracket with slot over bolt holding Cone/Strut Mounting Bracket to the orifice and
secure with Nut [DD].

See Figure 20B. Secure Cone to Fan installing Medium Bolt [BB] through the remaining

hole in the Cone Support Bracket and fasten with Nut [DD]. 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.

Use this hole for WM54K

See Figure 20B.

Nut [DD]

Medium Bolt [BB]

Nut [DD]

Figure 20B

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Installation InstructionsChapter 2

Step 21

Insert guard into cone with the eyelets facing you. Install eyelets over bolts already installed in cone and fasten
with Nut [DD]. Secure remaining eyelets using Short Bolt [AA] and Nut [DD].

See Figure 21.

Previously installed - Bolt and Nut

Nut [DD]

Short Bolt [AA]

Nut [DD]

Figure 21

Step 22

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 [T]. Make sure cable is pulled snug.

See Figure 22.

Note:

When installing cable in
temperatures BELOW 60°F,
leave cable slightly slack
(do not overtighten).

Azuma [T]

20

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Coated Cable

Figure 22

© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 23

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 [JJ].

See Figure 23.

Cut Guard Wire Here

2.5 Motor Mounting

Step 24

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.
to hold the Sheave in place at this time.

Motor

Figure 23

Motor Sheave

Motor Key

Clamp [JJ]

See Figure 24. ONLY tighten the set screw enough

Note:

When wiring motor, check rotation of propeller.
Internal wiring of motor may need to be changed
to assure proper rotation of propeller.

Figure 24

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21© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 25

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.

Front and Middle Slots

Holes in Motor Bracket

See Figure 25.

Lower Motor Bracket Flange

Figure 25

Step 26A

Secure Motor to Motor Bracket and Motor Bracket Stiffener using (4) Short Bolts [AA] and Nuts [DD]. The rear
upper bolt is where Motor Bracket Stiffener is attached.

See Figure 26A.

Stiffener

Short Bolts [AA]

22

QM1078r1

Nuts [DD]

Figure 26A

© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 26B

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 attach bracket to framing using (1) Lag Screw [LL].

Frame

Stiffener

See Figure 26B.

Lag Screw [LL]

Figure 26B

Step 27

Use a straight edge or level to check alignment of Propeller Sheave,
Tensioner Pulley and Motor Sheave. If needed, adjust position of Motor
Sheave so the 3 pulleys line up. Once Motor Sheave is aligned tighten
the set screw to 75 in-lbs [9 N-m] torque.

See Figure 27.

Level

Motor Sheave

Tensioner Pulley

Propeller Sheave

Figure 27

Step 28A

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.

If desired the 2 drain holes in the Orifice Panel

See Figure 28A.

can be plugged using (2) Hole Plugs [KK].

Drain Holes

Figure 28A

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23© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 28B
To adjust belt tensioner to proper setting, loosen 10 mm bolt (using 17mm end wrench) to allow tensioner arm

to rotate. Working from inlet/motor side of fan, place a 27 mm (1
Turn wrench clockwise until the single mark on base of belt tensioner is aligned with Mark 2 on tensioner arm.
Hold tensioner at this setting and tighten the 10mm bolt to 40 ft.-lbs [54 N-m] torque. See Figure 28B.

1

⁄16”) wrench onto the hex on the tensioner.

Mark 2 on Tensioner Arm

Hex on Tensioner Arm

10mm
Bolt

Single Mark on Base

Figure 28B

Step 29A

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 29A.

60”

8” 12”

2”

14”

62”

24

QM1078r1

Figure 29A

© Munters Corporation, September 2019

Installation InstructionsChapter 2

Step 29B

Place guard against framing and fasten guard in place using (8) Shutter Clips [R] and Barn Screws (not provided),

2 per side. See Figure 29B.

Position for Securing Guard Position for Guard Removal

Shutter Clip [R]
with Barn Screw
(not provided)

Shutter Clip [R]
with Barn Screw
(not provided)

Position for Securing Guard Position for Guard Removal

Figure 29B

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25© Munters Corporation, September 2019

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 30A. 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 30B.

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 recommneded. Installation of line reactors is
recommended to reduce voltage spikes and harmonic distortion. Supplemental motor overload protection is also
recommended.

120 or 240 VAC

Power Supply for

Fan

Three Phase

Power Supply for

Fan

NOTE: A safety cut-off switch should be located adjacent to each fan.

Circuit Breaker Switch

L1 (H)

L2 (N)

G

L1 (H)

L2 (N)

T1 (H)

T2 (N)

T1 (H)

T2 (N)

Figure 30A

Single Phase - Motor Overload Protection with Disconnect

(SY2000 or Equivalent)

Safety cut-off

switch

L1

L2

L3

G

Motor Starter

L1

L2

L3

T1

T2

T3

G

T1

T2

T3

120 or 240 VAC

Power Out

to Fan

Three Phase

Power Out

to Fan Motor

G

26

KEY:

L1=Line 1

L2=Line 2
L3=Line 3
H=Hot
N=Neutral
G=Ground

QM1078r1

Figure 30B

Three Phase - Motor Overload Protection with Disconnect

NOTE: Information in parenthesis refers to 120 VAC control.

© Munters Corporation, September 2019

Electrical WiringChapter 3

3.1 Recommended wiring

Step 1

As the power cable exits the back of the motor form a drip loop and then run cable to power source.

See Figure 31A and 31B.

Drip loop

Drip loop

Figure 31A

Figure 31B

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27© Munters Corporation, September 2019

Operation

4.

4. Operation

1) 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.

2) ADJUSTMENTS: Set fan control to temperature shown on your Aerotech
ventilation system drawing, or to a value which will provide the desired
environmental conditions.

Single Phase Fans: Single phase fans are designed for single speed operation only.

Three Phase Fans:

If a frequency drive is used, the minimum operating frequency is 30 Hz.

!

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.

28

QM1078r1

© Munters Corporation, September 2019

Maintenance

5.

5. Maintenance

The following inspection and cleaning procedures should be performed monthly:

Tools Needed for Maintenance:

wrenches: 10mm, 13mm, 17mm, 27mm, ½", 6mm Hex

1) INSPECT PROPELLER: Check that propeller is secure on drive hub 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.

• DAMPER: Carefully clean dust from damper doors and frame so that doors

open and close freely. A brush or cloth should be used.

• GUARD: Clean any dust or feathers from fan guards using a brush. Dirty

guards can reduce airflow.

!

WARNING

Disconnect Power

Before Servicing

!

WARNING

Moving Parts, Disconnect

Power Before Servicing.

!

WARNING

Moving Parts: Disconnect

Power Before Servicing.

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!

!

WARNING

Do Not Power Wash

Electrical Devices.

QM1078r1

29© Munters Corporation, September 2019

MaintenanceChapter 5

5) CHECKING PULLEYS: Roll the belt off and look at all pulleys. If a pulley has grooves in it or is
no longer smooth, it needs replacement. A loose or slipping belt will reduce fan performance

up to 60% and cause premature belt failure.

6PRRWK

3XOOH\

*URRYHG

3XOOH\

6) CHECK DRIVE ALIGNMENT: Check alignment of belt on idler pulley, it should be centered
on the idler pulley. The belt tensioner idler pulley and propeller sheave are fixed in position,
therefore, alignment must be obtained by adjusting the motor sheave. If an adjustment is
needed, remove the belt, then loosen the set screws in the sheave and move as necessary to

Propeller
Sheave

Belt

Idler Pulley

Motor

Sheave

achieve proper alignment. Remember to tighten
the set screws after making an adjustment. Drive
alignment is very important for long belt life and
proper operation.

Straight Edge

7) BELT TIGHTENING: To adjust belt tensioner to the proper setting, loosen 10 mm bolt (using
17mm end wrench) to allow tensioner arm to rotate. Working from inlet/motor side of fan, place
a 27 mm (1

1

⁄16”) wrench onto the hex on tensioner. Turn wrench clockwise until the single mark
on base of belt tensioner is aligned with Mark 2 on tensioner arm. Hold tensioner at this setting
and tighten 10mm bolt to 40 ft.-lbs [54 N-m] torque.

!

WARNING

Do Not Power Wash

Electrical Devices.

!

WARNING

Moving Parts: Disconnect

Power Before Servicing.

30

QM1078r1

Mark 2 on Tensioner Arm

Hex on Tensioner Arm

10mm
Bolt

Single Mark on Base

© Munters Corporation, September 2019

Winterizing

6.

6.1 Winterizing

In most climates, it is probable that the ventilation system will never need to operate at a total capacity

during the colder winter months. Consequently, it is advisable to “winterize” those fans which will not
be used in cold weather to avoid unnecessary heat loss and condensation.

To winterize, turn fan control “off”. Install the insulated closure panel over the fan intake. If you don’t
have an insulated closure panel, a piece of rigid insulation material can be used. Remember the
insulation panel must be removed before warmer weather returns.

NOTE: At least one single speed fan should be left uncovered and with power available to provide air

movement in the event of variable speed control difficulties.

6.2 Winter weather protection

To prevent cone or fan damage from snow or ice sliding off building roof, weather protection must be
provided. A weather shelter may be constructed to cover the entire fan, See Figure 32, or snow guards

may be placed on the roof, See Figure 33.

Snow Guards located
per manufacturers

Provide Weather Shel­ter Over Fans

recommendations*

Building
Wall

6" Min.

Fan with
Discharge Cone

Ceiling

Figure 32

*Snow Guard Suppliers

Company Name Phone No. Fax No. Web Site

Snojax, Inc. 800-766-5291 717-697-2452 www.snojax.com
Polar Blox 800-298-4328 814 629-9090 www.polarblox.com
LM Curbs 800-284-1412 903 759-3598 www.lmcurbs.com
Alpine Snow Guards 888-766-4273 888-766-9994 www.alpinesnowguards.com

!

IMPORTANT

Munters Product and System

Warranties do not cover cone or fan

damage from external sources.

Note: Snow guards are designed to prevent sudden, dangerous snow

and ice slides when attached to the building roof according to
manufacturers recommendations. The supplier listing above is given
as a reference only. Munters does not endorse any specific snow
guard product and no performance warranty is implied.

Fan with
Discharge
Cone

Figure 33

QM1078r1

31© Munters Corporation, September 2019

Troubleshooting

7.1 Troubleshooting

7.

SYMPTOM

Fan Not Operating

Fan Operating­Insufficient Airflow

Excessive Noise

!

WARNING

Disconnect Power

Before Servicing

POSSIBLE CAUSES

1. Fan control set above room
temperature

2. Blown fuse or open circuit breaker

3. Propeller blade contacting fan housing

4. Fan control defective

5. Motor defective

1. Damper door jammed

2. Guard dirty

1. Propeller blade contacting fan housing

!

WARNING

Moving Parts, Disconnect

Power Before Servicing.

!

WARNING

Moving Parts: Disconnect

Power Before Servicing.

CORRECTIVE ACTION

1. Set to a lower temperature

2. Replace fuse or reset breaker

3. Realign propeller in fan housing

4. Repair or replace control

5. Repair or replace motor

1. Clean damper door & fan housing

2. Clean guard

1. Sand fan housing to remove high spot

32

QM1078r1

Excessive
Vibration

Fan Never Turns Off

1. Motor loose on mount

2. Propeller damaged

3. Motor or propeller shaft bent

1. Override thermostat set incorrectly

2. Control set for continuous operation

1. Tighten fasteners

2. Replace propeller

3. Repair or replace motor or propeller shaft

1. Set to the correct temperature

2. Set control correctly

© Munters Corporation, September 2019

Exploded View

1

8.

18

2

17

16

3

4

5

6

7

13

12

8

9

11

10

14

15

Fan Components

QM1078r1

33© Munters Corporation, September 2019

19

Exploded ViewChapter 8

20

21

Damper/Cone Components

22

23

24

25

34

QM1078r1

© Munters Corporation, September 2019

Parts ListChapter 8

Catalog No

Item

1 FH1654 Orifice Panel, FG 1

2 FP1454 Prop Assembly, 3-Blade, GZ 1

3 FH1532* V-belt, A-section, Aramid Fiber 1

4 FP2060 Hub with Bearing and Shaft 1

5 FH2137 Propeller Sheave, AL 1

6 KX1130 Shaft Shield, AL 1

7 KN1860 Hex Nut, M25x10mm, ZP 1

8 FH1996* Motor Sheave ⁵⁄₈” bore with keyseat, CI 1

9 FM1046* Motor, 56 Frame 1

10 FH2855 Motor Bracket Support Stiffener, GZ 1

11 FH2831 Mounting Plate for NEMA 56 Motor, PWDCTD 1

12 FH2505 Mounting Bracket for Belt Tensioner, PWDCTD 1

13 FH2402K Belt Tensioner Assembly with 3” Idler Pulley 1

14 FH1968 1-Hole Pivoting Shutter Clip, BLK PL 8

15 FH1341 Inlet Guard, 2” x 2” Mesh, GZ 1

16 FH1675 Tube Strut, Center, PWDCTD 1

17 FH1659 Drip Shield Plate, AL 1

18 FH1980 Cone/Strut Mounting Bracket, GZ 4

19 FH1454 Outlet Guard, Round, CTD BLK 1

20 FH4655 Discharge Cone Section, PL 4

21 FH2431 Cone Support Bracket, PC type, GZ 4

22 FA2054 Door Assembly w/ Latch (2 Doors), PL 1

23 FA2854 Main Frame Assembly, AL 1

24 KX1466 Tension Spring, 0.5”OD x 10.8”L , SS 2

25 FH1365 Wing Add-on Kit, 2 Wings w/ Hardware 1

* Parts listed are for specific fan configuration. Contact office for replacement part numbers for your fan configuration.

WM54K

FH2406 3” Idler Pulley only, with Bolt 1

FH2439 Tensioner Arm only, AL 1

.

Part Name/Description

Qty.

QM1078r1

35© Munters Corporation, September 2019

WM54K is developed and produced by Munters Corporation, Lansing, Michigan U.S.A. 1-800-227-2376

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],
Phone [phone],
Phone [phone],
[phone],
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],

India Munters India, Phone [phone], Indonesia Munters, Phone [phone], Italy Munters Italy S.p.A., Chiusavecchia,

Japan Munters K.K., Phone [phone], Korea Munters Korea Co. Ltd., Phone [phone], Mexico Munters Mexico, Phone

Russia Munters AB, Phone [phone], Singapore Munters Pte Ltd., Phone [phone], South Africa and Sub-Sahara Countries

Vietnam Munters Vietnam, Phone [phone], Export & Other countries Munters Italy S.p.A., Chiusavecchia Phone [phone]

Munters reserves the right to make alterations to specifications, quantities, etc., for production or other reasons, subsequent to publication.

China Munters Air Treatment Equipment (Beijing) Co. Ltd, Phone [phone], Denmark Munters A/S,

© Munters AB, 2015

36

QM1078r1

© Munters Corporation, September 2019