Do not start the pump if the
pressure difference between
inlet and outlet ports exceeds max. 16.0 psi (1.1 bar)
.
Attempts to start the pump at higher pressure difference
may cause stalling and damage of the motor.
NOTICE
Prevent internal condensation, transfer of liq-
uids or dust. The diaphragms and valves will
be damaged, if liquids are pumped in signifi-
cant amounts.
Check the pump regularly for external soiling
and deposits. Clean the pump if necessary
to avoid an increase of the pump’s operating
temperature.
NOTICE
IN
✘
condensate / dust
IN
✘
Avoid overheating (e.g., due to hot process
gases). Maximum permissible temperature
range: see „Gas inlet temperatures“, pg. 26.
NOTICE
Pumps with AC motor:
In case of overload, the motor is shut down by
a
self-hold thermal cutout
in the winding.
Note
: Only manual reset is possible. Switch
off the pump and disconnect from the power
source. Identify and eliminate the cause of fail-
ure. Allow the pump to cool down sufficiently
before restart.
Pumps with DC motor:
A temperature sensor at the circuit board protects the mo-
tor of pumps with 24V DC motor. In case of excess tem-
perature, the pump is switched off.
Note
: Only manual reset is possible. Disconnect the pump
from the power source. Identify and eliminate the cause of
failure.
°C / °F
I
➨
O
!
3.
2.
1.
NOTICE
Summary of Contents for MD 1
Page 27: ...page 27 of 72 MD 1 MD 1 C US pump with dual voltage motor 4 9 8 7 5 6 3 2 1 2 1 2 1 ...
Page 28: ...page 28 of 72 MD 1 VARIO SP Ensure sufficient venting of the pump 9 5 6 7 10 ...
Page 53: ...page 53 of 72 1 2 1 2 3 15 mm 4 6x size 2 2x 1 ...
Page 54: ...page 54 of 72 4 5 6 20696264 Clean ...
Page 55: ...page 55 of 72 Replacing the diaphragm 7 8 9 1 2 ...
Page 56: ...page 56 of 72 3 10 11 12 Pay attention to number of washers ...
Page 57: ...page 57 of 72 13 14 15 1 2 Pay attention to number of washers ...
Page 58: ...page 58 of 72 Replacing the valves and assembling the pump heads 16 17 18 4x ...
Page 60: ...page 60 of 72 22 23 16 15 24 1 2 Maintain all pump heads in the same way 15 16 mm size 2 2x ...