Samsung AE090JNYDEH Installation Manual page 22

Charging water
WATER WATER
OUTLET INLET
Pressure relief valve
A pressure relief valve is integrated on heater vessel of hydro unit and shall work in abnormal condition for protecting the
hydro unit .
• The pressure relief valve will operate releasing the pressure by flowing out some water through the drain hose .
• Make certain that the discharged water out of drain pan can not contact any electrical parts .
CAUTION
Piping insulation
The complete water circuit, including all piping must be insulated to prevent condensation forming on the surface of the
pipe and heat loss to external environment .
After installation is completed the following procedures shall be used
to charge water into the hydro unit .
f Connect water lines to water connections of hydro unit .
f The air-vent valve shall be opened at least 2 turns and drain valves
f Open the service valve in the water supply connection .
Liquid Gas
pipe
pipe
f Water pressure of supply line shall be over 2 . 0 bar for good
f Stop water supply when the pressure gauge of hydro unit indicates
CAUTION
Air-vent valve
Cap
ENGLISH-21
f
f
shall be closed .
f
f
charging work .
f
2 . 0 bar .
• Service space should be secured .
• Water pipe and connections must be cleaned using
water .
• If internal water pump capacity is not enough, install
external water pump .
• Do not connect electric wire while water charging .
• When initial installation or re-installation required, open
the cap to prevent air trap in the unit while charging
water .
• The back-up heater vessel shall be full of water before
heater is turned on . Confirm if the vessel is empty by
opening the pressure relief valve of hydro unit . (OK if
water is flowing out)
• It is recommended to install the make-up water
assembly to feed small quantities of water to the system
automatically, replacing the minor water losses and
maintaining the system pressure . This assembly usually
consists of a pressure-reducing valve, water filter, check-
valve and shut-off valves . In this case, Check-valve must
be installed to prevent from contaminating city water .