Carrier 39E Operations Instructions download pdf (Page 17)

6.13.3 - Infrasonic humidifier

- First carefully read the instructions from the supplier. The

following points require extra attention.

- Check the connections of the high-pressure pipes.

- Ensure that the pipes do not rub against anything.

- Check if the spray banks work well.

- Check the operation of the pressostats and the pressure.

- Check the water quality.

- Check the contamination of the rinse filter.

- Check the operating pressure weekly. Higher pressure

indicates an increase in contamination.

6.14 - FAN

6.14.1 - General

- Caution: The air flow may cause stationary parts to move

(even a fan that is switched off)!

- Caution: While working on the fan, the switch has to be

locked open.

- The data for the belt type, belt tension, number of belts,

size and type of pulley is indicated on a label attached to

the fan housing.

6.14.2 - Bearings

The bearings of the smaller fan types cannot be lubricated.

If the larger fans are of the relubricated type, then they

should be lubricated every six months. For higher

temperatures and increased contamination the lubrication

interval should be adjusted as required. The standard

lubricant is Shell Alvania R3. For higher temperatures and

a higher degree of humidity use a lubricant recommended

by the supplier.

The electric motors are equipped with roller bearings.

Depending on the motor size the bearings are lubricated for

life or are equipped with a grease nipple. The lubrication

interval and type of lubricant are as above.

6.14.3 - Transmission

After starting up the unit, but also after replacing the belts

the belt tension has to be checked within one week and then

after two weeks and further tensioned if required. After that

check the belt tension and inspect the condition of the belts

every three months.

The CORRECT BELT TENSION depends on:

- the belt type;

- power to be transmitted;

- belt velocity.

The belt tension is calculated for each transmission. If the

belt tension is too high this can result in bearing wear and

vibration, if it is too low this can result in belt slippage and

belt wear.

Sequence for installation of new belts:

- Ensure that the pulleys are correctly aligned. If necessary

re-align.

- Position all belts loosely on the pulleys, do not pull

tensioned belts over the pulleys.

- Tension the belts and check the tension with a Sonic

Tension Meter.

- Re-check the alignment.

If the fan speed changes or if a motor with different power

specifications and/or speed is installed, the manufacturer

must be informed. The supplier must re-calculate the

bearing load as well as the impeller load. If this is not done,

irreparable damage to the fan may incur. The supplier does

not accept any responsibility for modifications that have not

been approved. See chapter 1.1.

- The warning pictograms indicating rotating parts,

electrical voltage and opening of doors are attached to the

door.

6.15 - Sound attenuator

Under normal conditions the sound dampers are maintenance-

free. Nevertheless it is recommended to check the attenuators

once a year for possible damage and loose fibres, in order to

prevent further contamination of the system.

! Warning!

Before opening doors, switch off and deenergise the

fan, and ensure that it has stoopped rotating.

(minimum of 2 minutes)

Caution: While working on the fan the switch has to be

locked open.

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Carrier 39E Operations Instructions Page 17

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