Charging Water; Pressure Relief Valve; Piping Insulation; Air-Vent Valve - Samsung AE090MNYDEH Installation Manual

Pipe work

Charging water

WATER
OUTLET
After installation is completed the following procedures shall
be used to charge water into the hydro unit.
• Connect water lines to water connections of hydro unit.
• The air-vent valve shall be opened at least 2 turns and
drain valves shall be closed.
• Open the service valve in the water supply connection.
• Water pressure of supply line shall be over 2.0 bar for good
charging work.
• Stop water supply when the pressure gauge of hydro unit
indicates 2.0 bar.
22
English
Gas
Liquid
pipe pipe
WATER
INLET

Air-vent valve

Cap
CAUTION
• 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.

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.
CAUTION
• 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.

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.