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6.2.14. Frost protection measures
The chiller is exposed to the risk of frost in two different situations. Both with an ambient
temperature < 0 °C and a feed temperature < 8 °C there is a risk of freezing of parts of the cold
water circuit system.
Installation in ambient temperature < 0 °C with anti-freeze
The machine is protected against freezing by antifreeze. Ensure that you always comply with the
requirements with regard to the operating fluid and the mix ratio. This is also valid for the version
with water cooled condenser (3.3 Version with water cooled condenser).
Feed temperature < 8 °C
The machine must be protected against freezing by antifreeze in accordance with the
specifications. Please note that the evaporation temperature is always significantly below die cold
water flow temperature. Even within the supposedly safe temperature range there can still be a
risk of freezing. Ensure that you comply with the requirements with regard to the operating fluid
and the mix ratio.
6.2.15. Flushing the cold water circuit
Contamination of external pipes and components can damage the chiller. Before the chiller is
connected hydraulically with the cold water circuit this must be flushed several times. If there are
dirt traps in the cold water circuit they must be cleaned after the flushing.
6.2.16. Filling
If the hydraulic installation of the overall system has been completed the chiller can be filled. All
shut-off valves in the cold water circuit must be opened.
Procedure for chillers with integrated tank:
Remove the cladding panels 3 and 4 (see Chapter 1.3 Elements) and fill your system via the
internal filling connection mounted on the tank or use a hose to fill directly into the internal tank.
Procedure for chillers without integrated tank:
Remove the covering panel 3 and 4 (see chapter 1.2 Elements) and fill your system with the
internal filling connection above the tank (when doing so, close the shut-off valve leading to the
level sensor). It is also possible to fill directly into the tank by using a hose.
ATTENTION! Only use approved refrigerants, see Chapter 2.17 and 2.18!
If there is a risk of frost, note Chapter 6.2.14!
All operating liquids must be mixed before they are added to the system!
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