Miele PWM 511 Operating And Installation Instructions page 60

Installation
Drain valve
(depending on
model)
Drain pump
(depending on
model)
60
In the case of washing machines with a drain valve, a motorised valve
is used to drain the machine. An HT DN 70 angle connector can be
used for draining the machine directly into the waste water system
(without a siphon) or into an on-site gully (with odour trap).
Thanks to an improved closing mechanism and a larger cross-
section, even the coarsest of soiling does not leave any deposits or
debris behind which could result in blockages. The drain valve can
also be operated manually to allow the suds container to be emptied
in the event of a power cut.
A vented drainage system is vital for unimpeded drainage.
If several machines are connected to a single drain pipe, this
should be sufficiently large to allow all machines to drain
simultaneously.
The appropriate Miele installation set mat. no.: 05 238 090 is
available from Miele for venting an HT DN 70 pipe (not available
from Miele).
If the slope for drainage is extremely steep, the piping must be
vented to prevent formation of a vacuum in the machine's drainage
system.
Slow or obstructed drainage or a backup of water in the drum as a
result of undersized pipework can result in faults occurring during
programmes, which will result in fault messages appearing in the
display.
 Outflowing suds can be as hot as 95 °C. Danger of burning!
Avoid direct contact.
In machines with drain pump, the suds are drained through a drain
pump with a delivery head of max. 1 m.
The drain hose must be installed free of kinks for the suds to drain
freely.
There are the following options for draining the machine:
- drain hose connected to a plastic drain pipe with a rubber sleeve
(there is no need to use a siphon)
- Connected over the rim of the laundry trough or into the sud-saver
pipe of the laundry trough
- connected securely to a floor drain (gully)
If required, the hose can be extended to a length of up to 5 m. The
corresponding accessories are available from Miele.
For a drain height of more than 1 m, a replacement drain pump for a
delivery head of max. 1.8 m is available from Miele.