User Manual

Maintenance and Cleaning

To prevent damage to the heat exchanger and refrig-

rant components, do not chemically clean the

refrigerant circuit of the heat exchanger.

In some applications the heat exchanger may be

subject to severe conditions, including high temper-

ature and/or hard water conditions, causing acceler-

ated scaling and corrosion rates, which will alter the

performance of the heat exchanger. In applications

where these factors are present it is important to

establish a regular maintenance and cleaning

schedule.

NOTICE

WARNING

ENERAL GUIDELINES FOR CLEANING

• A 5% solution of Phosphoric Acid or Oxalic Acid is

ecommended as a cleaning solution. Other types

of cleaning solutions such as ice making machine

de-scaler are available and may be used, check the

manufacturer’s instructions for compatability.

• Do not heat the acid solution when back flushing

through the heat exchanger.

• Flush the heat exchanger with fresh water when the

cleaning process is completed. A final rinse using a

solution of 1 to 2% sodium hydroxide (NaOH) or

sodium bicarbonate (NaHCO3) ensures all acid is

neutralized.

• For optimum cleaning the cleaning solution flow rate

should be a minimum 1.5 times the normal opera-

tional flow rate and preferably in a back flush mode.