Drummond MOV-90CN1-D Panduan Instalasi - Halaman 15

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For required to deflection

Belt section

Small pulley

diameter (mm)

SPA

109 to133

SPA

The belt which is too tight or too loose may generate noise

and be harmful to the unit.

1) Maintenance of fan :

One week after the unit is running, the elastic belt should be

re-adjusted, and should be inspected once every three months in

accordance with the requirements of inspection.

2) Maintenance of belt and pulley :

When the unit is running, check tension of the belt in a regular

time. Do the inspection job according to requirements of inspection

Tension adjustment of the belt: If the belt tension is proper, it will

help to avoid fan vibration, reduce noise and belt abrasion.

Customers should check belt tension every week and do

adjustment according to the following procedures if necessary:

a. Loosen the 4 fixed nuts of motor. Tighten or loosen the nuts

to move the motor.

b. Act in the middle of the belt perpendicularly with a finger.

Adjust belt tension until there's deflection distance, please refer to

Fig 10-4 If possible, it is better to use a tension frequency test

device, in order to get a more precise tension.

c. Tighten the fixed bolt of motor again.

Pulley revise: Fan pulley and motor pulley should on the same

plane, or it will consume much more energy and curtail service

life of belt. Every time after belt adjustment, you should check if

positions of the 2 pulleys are correct, refer to figure 10-3, you can

put a ruler on the same side of 2 pulleys to check if positions of 2

pulleys are correct. Check if point 1, point 2, point 3 and point 4

are in the same plane. If not, you can loosen fixed screws of fan

pulleys and along the fan axle to slide fan pulleys. Loosen motor

to adjust the angle on the fan slide way. Adjust to straightness

2mm.

Installation Manual

Newton(N)

Kilogram-force(kgf)

25 to 35

2.5 to 3.6

NOTE

3) When the unit is not running and heating system is not run-time in

the winter, the water must be drained out the coil (system) or add

the appropriate concentration antifreeze, otherwise the coil will be

frost crack.

4) Filter should be cleaned by using water or detergents depending

on the degree of dirt, cleaning frequency according to the using

environment, it is recommended a regular once a month.

5) For the units with humidifier, ECSE etc. special functions, pay

attention to read the components operation instructions along with

the unit, and do periodic check as the instructions.

NOTE

1. Straightness requirements and tension requirements should be

satisfied at the same time after adjusting belt and pulleys.

2. When the service time has reached to 24 hours for the newly used

belt, you must check belt tension and adjust it properly. Improper

adjustment or no adjustment may result in belt lifespan reduction.

Even more it will cause belt fracture.

3. Belt is consumable. It is normal when after 6-months usage, the

belt is abraded and lose efficacy. You need to change a new belt at

this time. If multi-belts rotate, you should change the group of belts

simultaneously.

Replace the air filter.

Loose filter access panel's pole and remove it.

pull out the filter along the supporting slot.

Clean the air filter (Vacuum cleaner or fresh water may be

used to clean the air filter. If the dust accumulated too much,

please use soft brush and mild detergent to clean and dry out

in cool place) .

The air-in side should face up when using vacuum cleaner.

The air-in side should face down when using water.

CAUTION

Do not dry out the air filter under direct sunshine or heat.

Fig.10-6