Outdoor Units: HWS-1104H8(R)-E, HWS-1404H8(R)-E, HWS-1604H8(R)-E
Hydro Units: HWS-1404XWH**-E
Water Piping
WARNING
• Ensure that the heating circuit, and all components of the heating circuit, are installed in accordance with
all National and local regulations
• The water pipes must not be installed where they are exposed to low ambient air temperatures. This is to
prevent the water freezing in the pipes
• Make sure that water pipes have sufficient pressure resistance
(The setting value of the pressure relief valve is 0.3 MPa).
CAUTION
• Do not use zinc plated water pipes. When steel pipes are used, insulate both ends of the pipes.
• The water to be used must meet the water quality standards specified in EN directive 98/83 EC.
Water Circuit
• Install a strainer with 30 to 40 meshes (procure locally) at the
water inlet of the Hydro Unit
• Install drain cocks (procure locally) for water charge and discharge
at the lower part of the Hydro Unit
• The ESTIA system can only be used on pressurised heating
circuits. If the system is used on gravity fed heating circuits then
system failure may occur
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