Unitary products group DF 072 Instruções de Operação descarregar pdf (Página 6)

035-18946-004-A-0204

6 Unitary Products Group

BLOWER ASSEMBLY

Even with good filters properly in place, blower wheels

and motors will become dust laden after many months

of operation. The entire blower assembly should be

inspected annually. If the motor and wheel are heavily

coated with dust, they can be brushed and cleaned

with a vacuum cleaner.

These units are supplied with blower shaft bearings

that do not require maintenance but may be relubri-

cated if desired. Every three years, using a low pres-

sure grease gun, pump grease into the bearing grease

fitting until grease just begins to show at the seals. Do

not over lubricate. Use any lithium base grease recom-

mended for ball bearing service.

MOTORS

Outdoor fan motors are permanently lubricated and

require no maintenance.

Ventor motor is factory lubricated for an estimated 10

year life.

Indoor Blower Motor and Drive - The indoor blower

motor features ball bearings that do not require peri-

odic lubrication. Periodic lubrication of the motor and

bearings can extend the life of components but is

optional.

If desired, every three years, using a low pressure

grease gun, pump grease into the bearing grease fit-

ting until grease just begins to show at the seals. Do

not over lubricate. Use any lithium base grease recom-

mended for ball bearing service.

CONDENSER COIL

An annual check and cleaning, if necessary, of the out-

door coil should be done. Cleaning should be as often

as necessary to keep the coil clean. Clean any debris

and dirt from the outside coil face with a brush being

careful not to damage the fins. If extremely dirty, a hose

can be used to wash the coil from the inside out while

brushing a soapy solution on the outside.

REGISTERS

Supply and return air registers must be open when the

unit is in operation. Obstructions must not be allowed

to block airflow in or out of the registers.

TROUBLESHOOTING

BEFORE CALLING A SERVICE PERSON:

A. Check thermostat setting and insure thermostat is

calling for heat or cooling.

B. Check thermostat for lint, etc.

C. Check fuses or circuit breakers.

D. Check filters for excessive dust accumulation.

FIGURE 5 - END VIEW LESS FILTER ACCESS

PANEL

Perform all maintenance operations on the blower

motor with electric power disconnected from the unit.

Do not attempt to lubricate bearings with the unit in

operation.

3 - 6 TON

(2) 14" X 20"

FILTERS

(1) 14" X 25"

FILTERS

Damage can occur if the bearings are overlubricated.

Use grease sparingly.

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Unitary products group DF 072 Instruções de Operação Página 6

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