VACUUBRAND PC 620 NT - Manual (Page 19)

page 19 of 63
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999188 / 19/05/2009
Attach the pipelines of the coolant circuit to the respective hose nozzles (hose noz-
zles 6 mm, see image) at the waste vapour condenser. Check hose connections
prior to starting operation of the cooling system.
Secure coolant hoses at the hose nozzles (e.g. with hose clip) to prevent their ac-
cidental slipping.
• The gas outlet (hose nozzle 10 mm) must not be blocked. The exhaust pipeline has
always to be free and pressureless to enable an unhindered discharge of gases.
• If necessary connect the exhaust to a suitable treatment plant to prevent the dis-
charge of dangerous gases and vapours to the surrounding atmosphere.
• Attention: Install hoses of the cooling system in a way to avoid flow / dropping of
condensed water onto the pumping unit (especially cables and electronic parts).
• Ensure that the coolant outlet pipeline is always free and that it cannot get
blocked.
• Maximum permissible coolant pressure at the exhaust waste vapour condenser:
6 bar (absolute)
• Comply with the maximum permissible coolant pressures of additional compo-
nents in the coolant circuit (e.g coolant valve).
• Avoid overpressure in the coolant circuit (e.g. caused by blocked or squeezed
coolant hoses).
• Install a coolant valve always in the supply line of the exhaust waste vapour con-
denser if applicable.
During operation
• Maximum ambient temperature: 40 °C
• Make sure ventilation is adequate if pump is installed in a housing or if ambient
temperature is elevated.
• Potentially dangerous gases or vapours at the outlet of the pump have to be
drained and disposed appropriately.
• Due to the high compression ratio of the pumps, pressure at the outlet port might
be generated being higher than the maximum permissible pressure compatible
with the mechanical stability of the system. Ensure that the pump outlet cannot
become blocked or restricted.
If pump is installed in altitudes of more than 1000 m above mean sea level check
compatibility with applicable safety requirements, e. g. IEC 60034 (motor may over-
heat due to insufficient cooling).
Do not start the pump if the pressure at outlet port exceeds maximum 1.1 bar
(absolute). Attempts to start the pump at higher pressures may cause blockade and
damage of the motor.
Check compatibility with maximally permitted pressure at inlet and outlet.
Prevent internal condensation, transfer of liquids or dust. The diaphragm and valves
will be damaged, if liquids are pumped in significant amounts.
Check the pump regularly for external soiling and deposits, clean if necessary to
avoid an increase of the pump‘s operating temperature.
If pumping condensable vapours (water vapour, solvents, ....), let the pump run with
gas ballast to reduce condensation in the pump.
In case of overload the motor is shut down by a self-hold thermal cutout in the
winding.
Attention: Reset possible only manually. Switch off the pump or isolate the equip-
ment from mains. Identify and eliminate the cause of failure. Wait approx. five min-
utes before restarting the pump.
NOTICE
NOTICE