5. Unit installation
Installer reference guide / Mono tank integrated type
39
Outdoor unit drain work
General area
While the air to water heat pump is operating in heating mode, ice can accumulate on the surface of the condenser.
To prevent ice from growing, the system occasionally enters a defrost mode and the ice on the surface thaws off.
Water dripping from the condenser is guided through the drain holes to prevent ice formation inside the base plate at
subzero temperatures.
• In case there is not enough space for natural drainage from the outdoor unit, additional drain work is required.
Follow the description as per below:
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Provide a minimum of 150 mm of free space to the floor.
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Insert the drain plug into the hole on the bottom of the outdoor unit.
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Connect the drain hose to the drain plug.
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Make sure dirt and debris cannot block the drain (hose). Clean the base plate whenever needed.
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For the remaining holes (that do not have the drain plug), insert the drain cap
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Make sure that the water dripping from the drain hose runs away correctly and safely.
≥150mm
WARNING
• If the drainage is not adequate, it can lead to stagnant water and ice build-up, causing system performance
issues and possible damages.