Daikin C10FZXS, Installation, Operation And Maintenance Manual

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Unless the heat exchangers are completely emptied and cleaned with anti-freeze solution, they have to be protected
against freezing.
Two or more of below protection methods should be considered when designing the system as a whole:
1. Continuous water flow circulation inside piping and exchangers
2. Addition of an appropriate amount of glycol inside the water circuit
3. Additional heat insulation and heating of exposed piping
4. Emptying and cleaning of the heat exchanger during the winter season
ATTENTION
It is the responsibility of the installer and/or of local maintenance personnel to ensure that two or more of the
described anti-freeze methods are used. Make sure that appropriate anti-freeze protection is maintained at all
times. Failure to follow the instructions above could result in damage to some of the machine’s components.
Damage caused by freezing is not covered by the warranty.
Loss of flow protection
All chiller are equipped with redundant differential pressure switches factory mounted to protect evaporator and
condenser from loss of flow
Cooling Towers
The condenser water flow rate must be checked to be sure that it conforms to the system design. A tower bypass valve,
controlled by the unit controller, is required to control the minimum condenser entering temperature. Unless the system
and chiller unit are specifically designed for them,
condenser bypass or variable condenser flow is not recommended,
since low condenser flow rates can cause unstable operation and excessive tube fouling.
Cooling towers are normally selected for condenser water inlet water temperatures between 24°C and 32°C.
ATTENTION
Tower water treatment is essential for continued efficient and reliable unit operation. If not available in-house,
competent water treatment specialists should be contracted.