Munters ATLAS 74 Fan with Munters Drive

Thank You

Thank you for purchasing an ATLAS 74 Fan with Munters Drive. Munters equipment is designed to be the highest performing, highest quality equipment you can buy. With 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 aghort.info@munters.com.

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.

Chapter 1: Unpacking the Equipment

1.1 Parts List

Each Fan includes:

• 1 x Munters Drive Fan
• 2 x Guard Sections, CTD
• 4 x Cone Sections, PL
• 1 x Shutter
• 2 x Shutter Wind Bracket, GZ
• 1 x Shutter Wind Pipe, GZ
• 4 x Reinforcing Ring, 1/4 Section, Atlas74, CTD-STL, White
• 1 x Hardware Package (HP1169 - Atlas 74) including:
  • 5/16"-18 x 1.25" SRTD Flange Head Bolts, ZP
  • 5/16"-18 SRTD Flange Nuts, ZP
  • 5/16" x 1 1/4" O.D. Flat Washers, SS
  • 5/16"-18 x 1.75" SRTD Flange Head Bolts, ZP
  • 5/16"-18 Nylock Nuts, ZP
  • 1/4" Type-A, Narrow Flat Washers, SS
  • End Pivoting Shutter Clips, SS
  • #14 x 1.5" Hex Washer, Lag Screws, SS
• 1 x Snow Ring Hardware Package (HP1202)

⚠️ WARNING: A Munters Lift Kit, FH1890, is required for installation of Atlas Fan. Failure to use the Munters Lift Kit may result in damage to the fan. DO NOT use chains to lift the fan for installation, as damage from chains will not be covered under warranty.

Each FH1890 Lift Bracket includes:

• 1 x Left Lift Bracket, PWDCTD
• 1 x Right Lift Bracket, PWDCTD
• 1 x Hardware Package (HP1891 - for FH1890) including:
  • 3/8"-16 x 1.5" Flange Head Bolts, ZP
  • 3/8"-16 SRTD Flange Nuts, ZP

1.2 Fan Dimensions

Fan Specifications:

• Hertz: 60
• Voltage: 460VAC
• Phase: 3
• Weight: 400 lbs. [182 Kg]

Diagram showing front and side views of the fan with labeled dimensions. The front view details dimensions A (74"), B (5 1/2"), C (21 1/2"), D (44 1/2"), E (89"). The side view details dimensions F (13 7/8"), G (35 3/4"), H (60 3/16"), J (2"), K-Dia. (85 3/8"). The wall opening is specified as 84 1/2" Width and 84 1/2" Height.

1.3 Fan Spacing

1.3A Recommended Fan Spacing

Diagram illustrating recommended fan spacing for side-by-side installation with Wind Kit Brackets adjacent. The top view shows two fans with a center-to-center distance of 98 inches, indicating a 3 3/4 inch clearance requirement for the Wind Kit Bracket. The elevation view reinforces the 98 inch center-to-center spacing and the 3 3/4 inch clearance.

1.3B Minimum Fan Spacing (Optional)

Diagram illustrating minimum fan spacing when Wind Kit Brackets are offset. The top view shows two fans with a minimum center-to-center distance of 93 inches, achieved by offsetting the Wind Kit Bracket 6 inches up or down on adjacent fans. The elevation view reinforces the 93 inch center-to-center spacing and the 3 3/4 inch clearance.

Chapter 2: Installation Instructions

2.1 Installation

Step 1: Construct the framed opening to the correct size according to the chart on Page 5. The frame should be constructed of 4x4 Treated Posts or double 2x Treated Studs. Diagrams (Figure 1A, 1B, 1C) show building column spacing (20'-0" O.C., 25'-0" O.C., 30'-0" O.C.) with framed openings for the fan, illustrating the use of 4x4 posts or double 2x treated framing and concrete stem walls.

⚠️ WARNING: A Munters Lift Kit, FH1890, is required for installation of Atlas Fan. Failure to use the Munters Lift Kit may result in damage to the fan. DO NOT use chains to lift the fan for installation, as damage from chains will not be covered under warranty.

Step 2: Attach each Lift Bracket to the Bearing Bracket and Strut using (4) Bolts [F] and Nuts [G]. See Figure 2, which diagrams the attachment of the Munters Lift Kit brackets (Left and Right Lift Bracket) to the fan's Bearing Bracket and Strut. Once the fan has been installed in the wall, the Lift Bracket can be removed and installed on the next fan.

Step 3A: Using the Munters Lift Kit, FH1890, insert the fan into the framed opening from the inside. While holding the fan tight to the framing, fasten the top of the fan with (5) 1/4" x 1.5"L. minimum Mounting Screws/Bolts (not provided). See Figure 3A, which diagrams the fan being inserted into the framed opening from the inside using the Munters Lift Kit and shows fastening points at the top, bottom, and sides. Next, fasten the bottom and then both sides with (5) 1/4" x 1.5"L. minimum Mounting Screws/Bolts per side. Install flashing around the opening tight to the fan and caulk around the fan to seal. Note: Once the Fan is installed in the wall, remove the Lifting Brackets from the Fan and install them on the next fan for installation.

Step 3B: If the fan needs to be mounted so that the shutter does not stick into the building, frame the fan as shown in Figure 3B. The top and sides require a 4" minimum clearance, and the bottom requires a 2" minimum clearance. Figure 3B shows alternative framing for mounting the fan so the shutter does not protrude into the building, specifying minimum framing clearances: 4 inches for top and sides, 2 inches for the bottom.

Step 4: Lay the (4) Reinforcing Rings in a circular pattern on a flat surface with the tabs facing up. Fasten the Rings together at the End Flanges using (3) Bolts [D] and Nylock Nuts [E], leaving one pair of the End Flanges unattached. See Figure 4, which diagrams four reinforcing ring sections laid out flat, with tabs facing up, and illustrates fastening the rings together at end flanges using bolts [D] and Nylock nuts [E].

Step 5: Wrap the Reinforcing Rings around the outlet orifice of the fan and align the slots in the tabs with the holes in the orifice. Secure the final End Flanges together using (1) Bolt [D] and Nylock Nut [E]. See Figure 5, which diagrams the reinforcing rings wrapped around the fan's outlet orifice, aligning slots in tabs with holes in the orifice, and securing the final end flanges with a bolt [D] and Nylock nut [E]. Do not fully tighten the last bolt and nut at this time.

2.2 Cone Installation

Step 6: Place all 4 cone sections on a flat surface with tabs from one facing slots of the next. See Figure 6A, which shows four cone sections laid out flat, with tabs from one section facing slots of the next. Curl up the tab end of the first cone section and insert tabs up into the slots in the next cone section. A mallet may be needed to seat slots over tabs completely. See Figure 6B, which illustrates connecting cone sections by curling the tab end of one section and inserting tabs up into the slots of the next, potentially using a mallet. Repeat this step until all 4 cone sections are connected and laying flat.

Step 7: Fasten each of the joints in the single outer hole using (1) Bolt [A] and Nut [B], with the nut on the side with the tabs. At the inner pair of holes of each joint, fasten using (1) Bolt [A] and Nut [B] with the bolt head on the side with the tabs. See Figure 7, which shows the inner and outer holes at the joints of the cone sections and illustrates fastening with bolts [A] and nuts [B], specifying nut placement on the tab side for outer holes and bolt head on the tab side for inner holes. Leave all bolts and nuts loose at this time.

Step 8: Stand cone sections on end and curl ends around to form a cone so that the nuts are outside and tabs on inside. Insert remaining tabs into slots so tabs are inside cone and fasten final joint using (1) Bolt [A] and Nut [B], with nut on inside of cone. At the inner pair of holes, fasten using (1) Bolt [A] and Nut [B] with bolt head on inside of cone. See Figure 8, which shows the cone sections stood on end and curled to form a cone, and illustrates fastening the final joint with bolts [A] and nuts [B], specifying nut placement on the inside for outer holes and bolt head on the inside for inner holes. Leave all bolts and nuts loose at this time.

Step 9: Make sure the slots in the tabs of the Reinforcing Ring still line up with holes in the orifice of the fan. Install the cone onto the fan over the tabs of the Reinforcing Ring by putting the cone over the fan orifice and lining up the outer holes of the cone with holes in the fan orifice and tab slots. Fasten the cone to the fan orifice using (12) Bolt [A], Washer [C], and Nut [B], with the bolt and washer on the inside of the fan orifice and the nut on the outside of the cone with the tabs between the orifice and cone. See Figure 9, which shows the cone being placed onto the fan's outlet orifice, aligning cone holes with fan orifice holes and reinforcing ring tab slots, and illustrates fastening with bolts [A], washers [C], and nuts [B], with bolt and washer on the inside and nut on the outside. Torque the last Ring Bolt to 125 in-lbs [14 Nm], and then tighten all the cone bolts.

2.3 PT Shutter Installation

Step 12: Install (6) End Pivoting Shutter Clips [K] at the pre-drilled shutter clip holes in the flange using (1) Lag Screw [H] and Washer [J]. The Washer should be mounted between the Shutter Clip and the flange. See Figure 12, which shows the installation of End Pivoting Shutter Clips [K] at pre-drilled holes in the fan flange using lag screws [H] and washers [J], with the washer placed between the clip and the flange.

Step 13A: Insert the PT Shutter into the fan by sliding the bottom flange of the shutter into the bottom shutter clips and pressing the shutter inward. See Figure 13A, which shows the PT Shutter being inserted into the fan by sliding its bottom flange into the bottom shutter clips and pressing inward. Note: The PT Shutter extends into the room 2 5/16" from the back of the fan.

Step 13B: Fasten the shutter in place by rotating the side and top shutter clips over the shutter flanges. See Figure 13B, which illustrates how to fasten the shutter in place by rotating side and top shutter clips over the shutter flanges, showing positions for installing/removing and holding the shutter.

2.4 Shutter Wind Kit Installation

Step 14: Mount one Wind Kit Bracket on each side of the fan, 3'-3" above the bottom flange of the fan. The opening in the 'U' slot should be facing up, and each Bracket should be mounted in the same direction. See Figure 14A, which shows the placement of Wind Kit Brackets on each side of the fan, 3 feet 3 inches above the bottom flange, with the 'U' slot opening facing upwards. Fasten the Brackets in place using (2) Lag Screws (not provided). See Figure 14B, which shows the Wind Kit Bracket being fastened to the fan housing using lag screws (not provided).

Step 15: Slide the Wind Kit Pipe into the hole in the Left Wind Kit Bracket until it stops at the other side of the Bracket and set the Pipe down into the slot in the opposite Bracket. See Figure 15A, which diagrams the Wind Kit Pipe being slid into the hole in the Left Wind Kit Bracket until it stops at the opposite bracket, then set down into the slot of the opposite bracket. See Figure 15B for the completed Wind Kit installation.

Chapter 3: Electrical Wiring

⚠️ WARNING: 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 the diagram on the motor nameplate and to information enclosed with the Munters environmental control to be used. After wiring, check motor rotation before servicing. High Voltage, disconnect power.

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 16, which illustrates three-phase power connection with motor overload protection and disconnect, showing L1, L2, L3 power supply connected through a Motor Starter and Safety cut-off switch to the fan motor terminals T1, T2, T3, and Ground (G). NOTE: A safety cut-off switch should be located adjacent to each fan.

3.1 Recommended Wire Routing

As the power cable exits the Munters Drive Box, form a drip loop and then run the power cable down along the strut. "Zip" tie the cable to the strut to prevent it from getting tangled in the propeller. See Figure 17, which shows recommended wire routing from the Munters Drive Box, illustrating forming a drip loop, running the power cable down along a strut, and securing it with zip ties to prevent entanglement with the propeller. Then, run the cable out of the fan to the circuit breaker or control panel. ⚠️ WARNING: Fan is designed to be operated with the shutter in place. Do not apply power to the fan without the shutter installed.

3.2 Three Phase Power Connection

All cables that enter the Munters Drive box must enter through a properly sized watertight fitting. 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 18A, which diagrams the Munters Drive box cover with captured screws, indicating the cover can be removed to access internal terminals. Run the 3-phase power cable through a 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 18B, which diagrams the inside of the Munters Drive box with terminals for connecting 460V 3-phase power supply (R/L1, S/L2, T/L3, and Ground). The Munters Drive is pre-wired to the Motor. The drive is factory-wired with a jumper that should not be removed. ℹ️ 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%. ***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 the Blue Box and Heat Sink must not be removed from the back of the motor. Removing the Base or Heat Sink from the motor will void the warranty. Any water or other damage to the controller will not be covered if either is removed.

3.3 Fan Operation with No Control

To operate the fan continuously with no control, provide a jumper wire between terminals 'S1' and 'SN'. See Figure 19, which diagrams fan operation with no control, showing a jumper wire between terminals 'S1' and 'SN'. Do not remove the Factory Installed Jumpers.

3.4 Fan Operation On/Off with Control

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 20, which diagrams fan operation On/Off with a control, showing wiring from 'SN' to a control's input relay and from the control's output relay to 'S1'. Do not remove the Factory Installed Jumpers.

3.5 Fan Operation Off/Low/High

To operate the fan Off/Low/High with a control, connect a wire from the '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 the 'S1' terminal to the output side of the 'ON' relay and connect a wire from the 'S7' terminal to the output side of the 'LOW' relay. See Figure 21, which diagrams fan operation Off/Low/High with a control, showing connections to 'SN', 'S1', and 'S7' terminals, and wiring to 'ON' and 'LOW' relays in the control. Do not remove the Factory Installed Jumper.

3.6 Fan Operation Off/Variable with 10-0V Signal

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 should go to 'A1' and the '-' output should go to 'AC'. See Figure 22, which diagrams fan operation Off/Variable with a 10-0V signal, showing connections from the control's 10-0V output ('+' to 'A1', '-' to 'AC') and an 'ON' command signal. ***NOTE***: All Low Voltage wire must be shielded cable, e.g., Belden 8770 or equivalent. Do not remove the Factory Installed Jumpers.

3.7 Fan Operation Off/Variable with Potentiometer

To operate the fan Off/Variable with a signal from a potentiometer, 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 Potentiometer as follows: connect '-' to 'AC', connect 'L' to 'A1', and connect '+' to 'V'. See Figure 23, which diagrams fan operation Off/Variable with a potentiometer, showing connections from the potentiometer ('-' to 'AC', 'L' to 'A1', '+' to 'V') and an 'ON' command signal. ***NOTE***: All Low Voltage wire must be shielded cable, e.g., Belden 8770 or equivalent. Do not remove the Factory Installed Jumpers.

3.8 Alarm Connections

The Munters Drive uses a Normally Closed circuit for alarm connections. To connect a control to the Normally Closed output, make appropriate connections from the control to 'MB' and 'MC' terminals. See Figure 24, which diagrams alarm connections using the Normally Closed (NC) output terminals 'MB' and 'MC'. Do not remove the Factory Installed Jumpers.

Chapter 4: Operation and Maintenance

4.1 Operation

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.

⚠️ WARNING: Disconnect Power Before Servicing.

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

⚠️ WARNING: Moving Parts, Disconnect Power Before Servicing.

4.2 Maintenance

The following inspection and cleaning procedures should be performed monthly:

1. INSPECT PROPELLER: Check that the propeller is secure on the 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 the 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.
   • SHUTTER: Carefully clean dust from shutter blades and frame so that blades 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.
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 the control case and sensor using a soft brush or cloth.

⚠️ WARNING: Do Not Power Wash Electrical Devices.

⚠️ WARNING: Do not apply power with shutter out.

⚠️ WARNING: NEVER CLEAN ELECTRICAL EQUIPMENT WITH A PRESSURE WASHER!

Chapter 5: Troubleshooting

5.1 Troubleshooting

⚠️ WARNING: Disconnect Power Before Servicing.

⚠️ WARNING: Moving Parts, Disconnect Power Before Servicing.

Chapter 6: Winterizing

6.1 Winterizing

In most climates, it is probable that the ventilation system will never need to operate at 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 the 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 the building roof, weather protection must be provided. A weather shelter may be constructed to cover the entire fan, See Figure 25, or snow guards may be placed on the roof, See Figure 26. Figure 25 illustrates a weather shelter constructed to cover the entire fan for protection against snow or ice. Figure 26 shows snow guards placed on a building roof above the fan, with a minimum 6-inch clearance from the building wall to the ceiling. It also includes a list of snow guard suppliers with contact information.

❗ IMPORTANT: Munters Product and System Warranties do not cover cone or fan damage from external sources.

Snow Guard Suppliers:

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.

Chapter 7: Exploded View and Parts List

Diagram showing an exploded view of the ATLAS 74 Fan with Munters Drive, illustrating all components and their assembly order.

Parts List

Contact Information

Atlas 74 Fan with Munters Drive 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 +46 08 626 63 00, Fax +46 8 754 56 66.

Munters Corporation 2691 Ena Drive Lansing, MI 48917 U.S.A. Phone +1 800-227-2376, Fax +1 517-676-7078 www.munters.us

Australia Munters Pty Limited, Phone +61 2 6025 6422

Brazil Munters Brasil Industria e Comercio Ltda, Phone +55 41 3317 5050

Canada/US Munters Corporation Lansing, MI Phone +1 517 676 7070

China Munters Air Treatment Equipment (Beijing) Co. Ltd, Phone +86 10 80 481 121

Denmark Munters A/S, Phone +45 9862 3311

India Munters India, Phone +91 20 3052 2520

Indonesia Munters, Phone +62 818 739 235

Italy Munters Italy S.p.A., Chiusavecchia, Phone +39 0183 52 11

Japan Munters K.K., Phone +81 3 5970 0021

Korea Munters Korea Co. Ltd., Phone +82 2 761 8701

Mexico Munters Mexico, Phone +52 818 262 54 00

Russia Munters AB, Phone +7 812 448 5740

Singapore Munters Pte Ltd., Phone +65 744 6828

South Africa and Sub-Sahara Countries Munters (Pty) Ltd., Phone +27 11 997 2000

Spain Munters Spain S.A., Phone +34 91 640 09 02

Sweden Munters AB, Phone +46 8 626 63 00

Thailand Munters Co. Ltd., Phone +66 2 642 2670

Turkey Munters Form Endüstri Sistemleri A., Phone +90 322 231 1338

USA Munters Corporation Lansing, MI Phone +1 517 676 7070

Vietnam Munters Vietnam, Phone +84 8 3825 6838

Export & Other countries Munters Italy S.p.A., Chiusavecchia Phone +39 0183 52 11