1. OPERATING INSTRUCTIONS
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1.1 Operation and control
The WWK300 domestic hot water ( D HW ) heat pump from STIEBEL ELTRON is an automatic
DHW heater offering a hot water storage capacity of 300 L.
Your local contractor must install, connect and commission your WWK300. Nevertheless, you should
familiarise yourself with the most important aspects of this equipment.
1.2 Equipment description and operation
The WWK 300 contains two heat sources; both heat the water to the required temperature:
− Heat pump
− Electrical supplementary heater within the cylinder
The WWK 300 is designed to intake air, extract energy from it and release this air at lower
temperatures at its exhaust. With the energy extracted it heats the water in the storage cylinder
producing domestic hot water ( DHW) . This process leads to cooling of the installation room by 1°-
3° C approx. It can also be operated with a connection to an air duct, in which case air channels must
not be smaller the 160 mm diameter and their length should not exceed 5 m ( contact us for informa-
tion ) . The WWK 300 also extracts moisture from the air, which turns into condensate and must be
drained off. A hose connection is provided for that purpose.
1.3 Incorrect operation
Never:
− use greasy exhaust air
− heat liquids other than potable water ( not suitable for heating swimming pools or spas )
− install the unit outside, in rooms at risk from frost, in rooms at risk from dust, gases or vapours
liable to explode
− operate the unit with an empty cylinder
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