Baltimore Aircoil Company VC2 Manual de Instruções de Operação e Manutenção - Página 10

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Maintenance

Procedures

(continued)

Figure 3 – Sleeve Bearing

TABLE 3. Sleeve Bearing Lubricants

TEMP AMBIENT

B.A.C. P/N

70°F to 110°F

#582628PI

30°F to 70°F

5°F to 30°F

#582627PI

-25°F to 5°F

CAUTION: Do not use oils containing detergents for

bearing lubrication. Detergent oils will remove the

graphite in the bearing sleeve and cause bearing fail-

ure. Also, do not disturb bearing alignment by tight-

ening bearing cap adjustment on a new unit as they

are torque adjusted at the factory.

FAN MOTOR BEARINGS

All Totally Enclosed Fan Cooled (TEFC) Fan Motors have

regreaseable bearings. The motor bearings should be

lubricated as recommended in the motor manufacturer's

operating instructions that are attached to the motor when

the equipment ships from the factory.

LOCKING COLLARS

Each eccentric locking collar should be checked

every six months to ensure that the inner bearing

race is secured to the fan shaft. The locking collar can

be set using the following procedure (see Figure 4):

1. Loosen the set screw.

2. Using a drift pin or centerpunch, tap the collar (in the

hole provided) tangentially in the direction of rotation

while holding the shaft.

3. Retighten the set screw.

OIL CUP

TEXACO

EXXON

Regal R & O 320

Teresstic 220

Regal R & O 150

Teresstic 100

Regal R & O 32

Teresstic

Capella

DIRECTION

OF ROTATION

Figure 4 – Locking Collar Assembly

ADJUSTABLE MOTOR BASE:

The motor base slides and adjusting screw (See Figure 5)

should be coated twice a year using a good quality corro-

sion inhibiting grease such as one of those recommended

for lubricating the fan shaft bearings (see Page 9).

Figure 5 – Adjustable Motor Base

VTO, VT1, VTL, VF1, VFL, VC1, VCL

ADJUSTABLE MOTOR BASE:

The motor base hangers, hinges, and adjusting screw

(See Figure 5A and 5B) should be coated twice a year

using a good quality corrosion inhibiting grease such as

one of those recommended for lubricating the fan shaft

bearings (see Page 9).

MOTOR

BASE

HANGERS

Figure 5A – Adjustable Motor Base

VC2-N138-N446

DRIFT

(A) TAP THE LOCKING COLLAR

IN DIRECTION OF FAN ROTATION

(B) TIGHTEN SET SCREW

AFTER CAM IS LOCKED

ADJUSTING

NUT

LOCK NUT

ADJUSTING SCREW

ADJUSTING

SCREW