Cli-mate CLI-AP30 Especificações descarregar pdf (Página 30)

3.22. Freeze protection

Freeze protection must be implemented in any regions that experiences freezing conditions at any time

throughout the year.

a) For areas with temperature not falling below 23° F (–5

C), simple low temp controller based freeze

protection may be used. (i.e. pump circulates if the manifold temperature approaches freezing). If possible,

backup protection in the form of uninterrupted power supply (UPS) or a power outage drain valve should

also be installed. Note: Power outage drain valve is installed on the return line (back from collector to tank)

and opens to allow water to slowly run through the collector if power supply is cut. A check valve between

the tank and drain valve must be installed, to ensure flow is through the collector. The Apricus direct flow

pump station uses this kind of valve. See section 8 for details. In the event that freezing temperatures will

occur follow the instructions in section 8.9 to drain the system.

b) For areas with temperatures below 23° F (–5

C), a closed loop filled with a freeze resistant heat transfer

fluid should be used. Please refer to heat transfer manufacturer’s specifications about the temperature

ranges the fluid can withstand. The pH and freeze level of the fluid should be tested every year before cold

weather occurs. Always follow the manufacturer’s guidelines when testing the pH and freeze protection of

the heat transfer fluid. Refer to sections 11.5,11.9, 3.31 & Appendices 11-17 for more information.

c) Evacuated tubes are not susceptible to damage in cold weather, and Apricus heat pipes are protected

against damage that could result from the freezing of the water inside.

✖ Freeze related damage is not eligible for warranty claims.

󱚡 WARNING

Failure to implement effective freeze protection may result in rupture of piping and can

cause substantial property damage.

󱚡 WARNING

Extended periods of cold weather at temperatures below the design limitations of the

systemʼs freeze protection method may cause freezing and damage to exposed parts of the

system. It is the ownerʼs responsibility to protect the system in accordance with the

Installerʼs instructions, if weather is anticipated to approach or exceed the speciﬁed freeze

tolerance limit.

3.23. Electrical Supply

a) Any electrical work must be completed by a licensed electrician and/or in accordance with relevant

electrical codes and regulations.

b) Power supply to the controller must be protected again water ingress.

c) Power supply to the controller must be disconnected when the cover is removed and/or work with the

pump or other slave devices are conducted.

3.24. Labeling

a) All piping and components should be labeled with descriptive stickers/tags to allow easy identification

during future troubleshooting, maintenance or upgrading. Labels must be durable enough to last for years

and withstand normal handling, wet equipment rooms and high temperatures.

3.25. Back-flow Prevention

a) All systems must install a check valve/non-return on the incoming cold supply line before the hot water

tank. Local regulations may stipulate that a “back-flow preventer” that meets specific requirements be

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