Twin-city Modular Plenum Fans - MPLFN / MPLFS / MPLQN / MPLQ Manuel d'utilisateur télécharger pdf (Page 3)

Twin City IM-495 3

Fan Installation – Factory Assembled Units

Follow proper handling instructions given earlier.

1. Move the fan to the final mounting position.

2. Remove skid, crates, and packing materials carefully.

3. If supplied, place vibration pads or isolation base on

mounting bolts. Line up holes in fan base with bolts.

4. Place fan on mounting structure. Carefully level unit

using shims as required at all mounting hole loca-

tions. Bolt down the unit.

Assembly of Fans

1. Fans must be securely bolted to a base either directly

through the factory mounting holes or with a properly

designed clip. Final bolting of each individual row of

fans to the support structure or base should be done

after the individual fans are bolted together as a row.

NOTE: A thin gasket or caulk may be used to prevent

undesired air leakage and noise

2. The bolts to be snugged up on vertical sections for the

first row. Once all fasteners are in place, the bolts shall

be tightened to torque values in table. See Table 1.

3. The bolts holding the fan to the supporting structure

can now be torqued.

4. The second row and succeeding rows can be installed

using the same assembly steps as the first row.

5. Sealing around the perimeter should be accomplished

using a flexible material.

Electrical Wiring of Fans

The customer is required to investigate and install

equipment in compliance with all local electrical and

safety codes for the equipment location. Twin City Fan &

Blower requires all power cabling be located away from

the rotating impeller and fastened to the inside of the

fan housing. Wiring must be routed away from the motor

to reduce potential contact with hot or greasy surfaces.

When a fan is supplied with an outlet damper, wiring

the electrical supply to the motor requires routing the

supply through the damper housing frame. Knockouts of

various sizes are provided in the damper housing frame to

accommodate cable connectors or raceway (see ﬁgure 3).

Fan Operation - Safety

For general safety practices for air moving equipment,

see AMCA Catalog 410.

Twin City Fan & Blower has many safety accessories

available. These safety devices include (but are not

limited to) inlet and discharge screens. The use, abuse,

or non-use of safety devices is the responsibility of the

purchaser.

Facility-related safety conditions include fan accessibil-

ity and location. How easily can non-service personnel

access the unit? Is the fan in a hazardous duty envi-

ronment? Was the unit ordered for this duty? Other

concerns must also be addressed. All fans should be

powered through switches which are easily accessible

to service personnel from the fan. Every switch should

have the ability to be “locked-off” by the service person

and the key to be retained by this person to prevent

accidental power of the fan while service is in process.

Figure 2.

Table 1. Torque Values MPLFN/MPLFS/MPLQN/MPLQS

Fasteners

Size

Net Type

Torque Values

(ft lbs)

3/8

–

16 UNC

Nylock 16 – 17

3/8-16 x 0.75 Screws & Nuts

front and back anges

3/8-16 x 0.75 Screws & Nuts

axial anges where accessable

1 2 3 4 5 6 7

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Twin-city Modular Plenum Fans - MPLFN / MPLFS / MPLQN / MPLQ Manuel d'utilisateur Page 3

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