Operating and Maintenance Instructions
EN
DC.16DEX
12
www.dvp.it
8702042 – 01/10/2014 – R.4
5
OPERATING INSTRUCTIONS
5.1
OPERATION
Checks to be performed before start-up:
•
The pump is supplied without any oil in it. Use the supplied oil or, alternatively, an alternative lubricant of another
brand but with similar characteristics;
•
Make sure the intake and discharge of the pump are properly connected to the system and that, especially the
exhaust, is not obstructed by fittings or valves.
HAZARD
Use a lubricating oil that has a flash point above 135°C (T4), in order to avoid that this could create
an explosive atmosphere (ATEX).
Lube-free operation causes serious damage to the pump and the potential degradation of the level
of protection of the pump from the danger of explosion.
WARNING
A higher quantity of oil than necessary may cause clogging of the oil separators (if installed) and
damage to the pump or the electric motor.
5.1.1
FILLING THE OIL TANK
HAZARD
Before carrying out the operations listed below, isolate the pump from the operating system by
means of an isolation valve (required in 4.8 "System User" of this manual) and from the power
supply, then clean the surrounding area from the possible presence of a potentially explosive
atmosphere (ATEX) due to the opening of the oil filler cap.
WARNING
When filling the oil tank never exceed allowed maximum level.
•
Undo the oil filler plug;
•
Pour oil in the tank up to mid-range of the oil sight glass;
•
Close the filler plug;
•
Remove all oil spills from the pump and/or floor.
5.1.2
START-UP
HAZARD
The pump may reach high temperatures when operating.
1
~
Version:
Operate the switch on the terminal board.
3
~
and OEM Version:
Operate the start control on the user system.
After start-up, the pump may run slower than the regular rpm if room temperature is lower than allowed as seen on
the technical data table. It may also run lower if the oil is contaminated or the supply voltage is lower than the
required voltage as indicated on the motor rating plate.
If nominal rpm is not reached within a few seconds, the thermal switch fitted to protect the pump must trip
(installation required in 4.9.2 "Wiring" of this manual).
WARNING
If water vapour should be taken in, take the pump to a steady temperature by leaving it to run for
approximately 30 minutes with the suction inlet closed and the system containing the water
vapour isolated before starting the work cycle.
WARNING
Make sure the pump is working at the allowed pressure value and do not leave the pump running
for a long time (>10min) with the suction inlet completely open.
WARNING
It is advisable not to start the pump more than 12 times per hour to avoid excessive energy
consumption and damage to the pump.