9 x Taking out of service
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FA ROTEX HeatPumpSolarUnit - Part 2 - 05/2009
9 Taking out of service
9.1 Temporary shutdown
If the ROTEX HeatPumpSolarUnit is not needed for a long time, it can be temporarily decommissioned.
However ROTEX advises against disconnecting the system from the power supply, and recommends instead that you deactivate
the operating modes room cooling
1)
and room heating. The operating mode water heating must remain activated. To make frost
protection as energy-efficient as possible, the hot water temperature on the regulator of the operating panel can be set to the
lowest possible value.
The system is then protected from frost. The pumps and valve protection functions are active.
If it is not possible to guarantee the power supply when there is danger of frost,
– the water must be completely drained from the ROTEX HeatPumpSolarUnit and the HybridCube hot water storage tank or
– suitable frost protection measures must be applied to the system and hot water storage tank connected (e.g. draining).
Draining the hot water storage tank
• Switch off the main switch and secure against restarting.
• Only for ROTEX Solaris system: Completely drain the Solaris system (see operating instructions).
• Connect hose with connection from the accessory set (only this opens the foot valve automatically) to the solar return. If a
Solaris system is connected, use the boiler filling and draining valve on the Solaris return flow.
• Drain out water content from container.
Draining the heating circuit of the heat pump and hot water heat exchanger
• Connect drainage hoses to the non-return valves of the internal unit.
• Open the non-return valves on the internal unit.
• Allow the water circulation system of the internal unit and the pipework system of the heating system to drain according to
the siphon principle.
• Separate the heating flow and return as well as cold water inflow and hot water discharge on the hot water tank.
• Connect drain hoses in hoses in such a way that the hose opening is leakproof on the floor.
• Allow heat exchanger to run idle according to siphon principle.
CAUTION!
A heating system which is shut down can freeze in the event of frost and may suffer damage.
• If there is any risk of frost, empty any water from the decommissioned heating system.
• If the heating system is not drained and there is the risk of frost, the power supplies must be secured and
the main switch must remain switched on.
If there is a danger of frost because of an uncertain power supply for just a few days, you do not have to drain
the HybridCube hot water storage tank because the heat insulation is excellent, as long as the storage tank
temperature is monitored regularly and does not fall below +3 °C.
However, there is no frost protection for the connected heat distribution system through this.
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