Autostart AS-1251 Instructions d'exploitation télécharger pdf (Page 73)

7.6

Decalcifying cooling water circuit

Personnel:



Operating personnel

1. Switch off the device and prepare the decalcification process

accordingly.

The descaling agent should be fed to the water

cooling using a pump or a funnel through the

supply tube. The descaling agent return flow

should be via flow tube of the water cooling into a

container with sufficient capacity (at least 10

litres).

LAUDA descaling agent (catalogue number LZB

126, 5 kg packaging) is required for decalcifica-

tion. Read the safety instructions and the instruc-

tions for use on the packaging for handling the

chemical.

2. Clean the water filter of the device. The water filter is in the

supply of the water cooling.

Further information for cleaning the water filter can

be found in

Chapter 7.5 ‘Cleaning water filter’

on page 72.

3. Switch on the device and set the temperature setpoint on the

device to 10 °C

. After starting the refrigeration unit, fill the

water cooling supply tube with LAUDA descaling agent

(pump or funnel).

4. Continuously refill or pump the descaling agent. Continue this

process until the foaming reaction goes down. This is usually

the case after approx. 20 to 30 minutes.

5. Drain the condenser afterwards.

Further information about draining the condenser

can be found in

Chapter 9.2 ‘Draining con-

denser (only water-cooled devices)’ on page 80.

6. Reconnect the device to the water supply and rinse it thor-

oughly.

Allow at least 10 litres of water to flow through the

device.

7.7

Checking heat transfer liquid

Contaminated or diluted heat transfer liquid must be replaced. Fur-

ther use of the heat transfer liquid is only permitted with appro-

priate test results.

The heat transfer liquid must be checked according to DIN 51529.

Fig. 71: Decalcification

Maintenance

Variocool 73

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 103 104

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Autostart AS-1251 Instructions d'exploitation Page 73

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