Memmert PM 500 Self Drying Vacuumpump (Generation 2003) - Manual (Page 3)

1. Description,
Operating Conditions
The pumps transfer, and evacuate 100
% oil-free. In operation they are gas-
tight, and maintenance-free.
The self drying pumps make it possible
during evacuation to blow the conden-
sed liquid out of the pump heads at
high speed, while maintaining the
vacuum in the recipient at a constant
level. After drying the pump heads the
pumps achieve a greatly improved
vacuum and evacuate much faster
than pumps without a drying system.
The control for the drying system is
effected via solenoid valve and three
variables:
½ The time between switching on the
drying system and the first ventila-
tion of the pump heads (t1)
½ The duration of the ventilation of
the pump heads (t2)
½ The interval between pump head
ventilation operations (t3).
This pump model is equipped with the
solenoid valve for ventilating the pump
heads. The scope of delivery does not
include control electronics.
1.1 Electrical Equipment
½ See section 8 for full electrical
data.
½ The pumps are fitted with a thermal
-switch to protect against over-
loading.
1.2 Operating Conditions
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
These pumps must not be used if
the entry of air into the pump
during venting (drying system)
could result in the creation of reac-
tive, explosive or otherwise hazar-
dous mixtures.
Prior to any use of the pump en-
sure that the creation of reactive,
explosive or otherwise hazardous
mixtures during the supply of air is
prevented.
½ For maximum permissible operating
pressure, ultimate vacuum, and
flow capacity: see chapter 8.
½ The pumps must not be used for
liquids. You will find suitable liquid
pumps in our Product Program.
If your potential application lies outside
the above limits discuss it with our
technical adviser (see last page for
contact telephon number).
1.3 Ambient Condition
When the pumps are operating the fol-
lowing ambient conditions must be
maintained:
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
½ Ambient temperature during opera-
tion: between + 5 °C .... + 40 °C.
½ During operation an adequate
supply of air for cooling must be
provided.
2. Safety
½ Note that the pumps may only be
used for their intended purpose.
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
These pumps must not be used if
the entry of air into the pump
during venting (drying system)
could result in the creation of reac-
tive, explosive or otherwise hazar-
dous mixtures.
Prior to any use of the pump en-
sure that the creation of reactive,
explosive or otherwise hazardous
mixtures during the supply of air is
prevented.
Components connected to the
pumps must be designed to with-
stand the pneumatic performance
of the pumps (see chapter 8).
½ Plug the pump only into properly
installed grounded outlets.
When the operation of the pump is
interrupted by the thermal switch, it
will re-start automatically after
cooling down. Take all care neces-
sary to prevent this leading to a
dangerous situation.
Specific safety instructions and
measures for the media being
handled must be observed.
½ Parts of the casing marked with the
sign below are only allowed to be
opened after pulling out the plug
(disconnecting the power source).
½ Use only original KNF replacement
parts.
3. Installation
½ Choose a safe location (flat sur-
face for the pump).
½ Install the pump so as to ensure
adequate flow of air cooling.
½ Connect the suction and pressure
lines (tube ID 10 mm).
Ī
Arrange the pressure line so
that condensate can flow out
of the the pump (falling pipe).
½ The condensate is conducted out
of the pump via the pressure line.
A container is to be installed to
catch the condensate.
½ The solenoid valve must be
connected to the drying system
control electronics (not included in
scope of delivery); see fig. 1.
½ Plug the pump only into properly
installed grounded outlets.
½ Compare the supply data with the
elecetrical data of the pump. The
voltage must not vary by more than
+ 10 %, and -10 % from that shown
on the type-plate.
4. Operating Instructions
4.1 Operating Conditions
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
These pumps must not be used if
the entry of air into the pump
during venting (drying system)
could result in the creation of reac-
tive, explosive or otherwise hazar-
dous mixtures.
Prior to any use of the pump en-
sure that the creation of reactive,
explosive or otherwise hazardous
mixtures during the supply of air is
prevented.
Specific safety instructions for the
media being handled must be
observed.
½ The pumps must not start against
PM 16527-860.3-2.00 e 11/05
Symbols:
ቢ
=
Position in the illustration,
½
=
Important point,
ᕡ
=
Task,
̈
= Advise to user
Warning
KNF resrve the right to make changes
2