Water Connection; Cold-Water Connection; Hot Water Connection - Miele PWM 920 SI Installations Plan

Cold-water con-
nection
Hot water con-
nection

Water connection

According to national regulations for drinking water quality, with ef-
fect from March 21, 2021, a non-return valve to prevent backsiphon-
ing must be installed between the faucet and the water inlet hose
during commissioning on all machines in Germany. The non-return
valve prevents water from the water inlet hose from flowing back
into the on-site drinking water supply.
Non-return valves are supplied.
The flow pressure must amount to a minimum of 100 kPa (14.5 psi)
and must not exceed an overpressure of 1,000 kPa (145 psi). If the
flow pressure is higher than 1,000 kPa (145 psi), a pressure reducing
valve must be used.
The machine must be connected to the water connection using the
water inlet hoses provided.
 The connection points are subject to water connection pres-
sure.
Turn on the water supplies slowly and check for leaks. Correct the
position of the seal and screw thread if appropriate.
For the cold-water connection one shut-off valve each with a
¾" external thread is required. A connector (Y-piece) can be used if
required to connect 2 water inlet hoses with a ¾" screw thread to a
single faucet with a 1" male thread.
The water inlet hose for cold water (blue stripes) is not intended to
be used with a hot-water connection.
To minimize energy consumption during operation with hot water,
the washing machine should be connected to a suitable hot water
ring circuit if present.
So-called "transmission lines" (single lines to hot water generators)
can result in cooling down of the water remaining in the pipes if not
in constant use. More electrical energy would be needed in order to
heat the suds.
Use the water inlet hose supplied (red stripes) for the hot water con-
nection.
The temperature of the water intake must not exceed 158°F (70°C)
on machines with electric heating (EL).
The temperature of the water intake must not exceed 194°F (90°C)
on machines without heating (OH).
The machine must be connected to the water supply using the inlet
hoses provided.
en - Installation and planning notes
7