63
Mechanical and electrical design
Drain valve
Description
The drain valve consists of a bracket (1), on
which are mounted the motor and gear (2) and
diaphragm (3). The rubber diaphragm is resistant
to a water temperature up to 100
°
C (212
°
F). The
installation of a lint trap is not necessary. The
machine is equipped with an overflow, which
bypasses the drain valve. The drain can be
cleaned by removing the drain connection (4)
outside of the machine or by removing the rubber
diaphragm (3). The motor and gear assembly is
covered by a plate and provided with quick-
disconnect electrical connections. The stator coil
is constructed for continuous operation.
Operation
The drain valve is normally open, i.e. the motor
does not close the valve until it receives current
via a contact of the timer. As soon as the current
is cut, the shaft turns and opens the diaphragm
of the valve. This also permits the machine to
drain, in the event of power failure. The overflow
hose (5) leads excess water or suds directly to
the waste line, in the event of failure in the inlet
valves or level control.
Trouble-shooting
If the valve does not open or close properly:
1. Check that the shaft is moving freely.
2. Check that the diaphragm is not obstructed.
3. Check the coil for continuity.
Clean out
Periodic cleaning of the valve is recommended,
depending upon how often the machines are
used, as well as the type of wash handled most
frequently.
76
Fig.
76
0313
