MIL'S EVISA Serie Manual De Utilización página 18

EVISA E150.R, E200.R and E300.R: Remove the motor and detach the 1/2 coupling sleeve from the rotor shaft
and then disassemble the lamp.
Replace the 3 sliding vanes one by one by respecting the position of the sliding vane's chamfer, rounded shape
at the rear.
3.3.12. Oil level safety device (optional)
It is possible to install a float that triggers an alarm if the oil level drops. It is mounted on the plate where the
oil level sight glass and drainage valve are installed.
When installing the float, take care to seal the threading properly.
Practical tip: it is recommended to apply a timeout of at least 30 seconds on the alarm signal to avoid having
untimely activation (swashing of the oil).
3.3.13. Electric motor
You should ask a specialist in electric motors for maintenance and assistance.
3.4. Disposal
Before any dismantling operation, make sure that the pump does not present any risk generated by
substances drawn. See safety sheet on ANNEX
The pump must be dismantled. The materials must be sorted, collected, recovered according to current
regulations.
The main wastes to be recovered are:
- Metallic materials
- DEEE
- Oil
The collection and recovery must be done by service providers authorised in accordance with the current
regulations.
514400.14
EVISA E17/E25/E40/E65/E100/E150/E200/E300
4. TROUBLESHOOTING ADVICE IN CASE OF MALFUNCTIONING
Do not dismantle the pump more than necessary during repair, servicing or maintenance operations.
INCIDENT
1.7.
1 - The motor cuts out.
1.8.
1.9.
1.10.
1.11.
1.12.
2.6.
2 – The pump flow rate is too low.
2.7.
2.8.
2.9.
2.10.
3.5
3 – Insufficient vacuum created.
3.6
3.7
3.8
4.9
4 – Vacuum pump overheating.
4.10
4.11
4.12
4.13
4.14
4.15
4.16
5.7
5 – Vacuum pump emits fumes at exhaust, or
5.8
oil consumption is high.
5.9
5.10
5.11
5.12
6.3
6 – Oil backs up by suction to vacuum chamber
6.4
7.4
7 – Abnormal noises
7.5
7.6
8.5
8 – Presence of water in the oil
8.6
8.7
8.8
5. SAFETY SHEET
See annex
PROBABLE CAUSE
Mains power supply voltage or frequency incompatible with motor
characteristics.
Check the circuit breaker setting.
Check the electrical connections.
The oil is too viscous or the room temperature is too low.
Rise of pressure in the exhaust unit:
- oil separating cartridge clogged,
- pump exhaust line restricted or blocked.
Hard spot felt when pump rotated by hand: check the vanes.
Pump inappropriate for the application.
Suction intake screen clogged
Suction filter (optional) clogged
Oil separating cartridge clogged.
Piping too long or diameter too small, causing excessive head loss.
Leaks in the vacuum pipes or monitoring and control gear.
Insufficient lubrication: add oil; or filter clogged.
Pump too hot.
Air being taken in at automatic trap (impurities, etc.).
Room too small, poorly ventilated or room temperature is too high.
Insufficient distance between the wall and the pump fan.
Unsuitable oil.
Temperature of sucked in gas is too high.
Start of clogging of the separating filter.
Exhaust line cross-sectional area too small.
Poor lubrication: add oil; or oil filter clogged.
Clean oil cooler (only E200 & E300 vacuum pumps)
Separating cartridge incorrectly installed.
Separating cartridge broken or burst.
Automatic trap for re-injecting oil is blocked or its float is filled with
oil.
Oil filler cap not properly tightened.
Vacuum pump overheating.
Unsuitable oil.
Non-return valve faulty.
Motor running in reverse
Pump makes clicking noise: vanes worn or deformed.
Metallic noises: fan is touching another part or the cover is touching
a lubrication pipe.
Oil viscosity too high or oil too cold.
Pump is sucking up fluids: trap fluids upstream of pump.
Install an gas ballast system.
Pump temperature too low due either to insufficient operating time
or because room is too cold: install a preheating and rinsing system.
Consult us for this.
Exhaust channelled and condensates returning into the pump:
install a low point trap.
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