Product Description; Filter Cleaning; Pressure Relief Valve; Safety - PLYMOVENT MDB-2/HV Manuel D'installation Et D'utilisation

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PROdUCT dEsCRiPTiON

2.1 Components
The unit consists of the following main components and
elements:
Fig. 2.1
A HV fan
B filter cartridges (CART-PTFE/10)
C dustbin (DB-80)
D control panel
E air inlet
F spark arrester (SparkTrap)
G cooling fan
H pressure relief valve
I duct silencer + air outlet
A
B
C
Fig. 2.1 Main components and elements
2.2 Operation
Refer to Fig. II on page 19 for an overview of the
system.
Welding torches provided with an extraction nozzle must be
connected to the central extraction duct.
The extracted welding fume passes a spark arrester
(SparkTrap) before it reaches the filter cartridges inside the
unit. The filtered air is blown back into the workshop by the
outlet on top of the fan.
2.2.1 Control
The system is operated by a rotary switch (on/off) on the
control panel.
0000112315/011017/0 MDB-2/HV
The weekly timer of the PLC arranges the on/off times of the
system .
1
2.2.2

Filter cleaning

The filter cartridges are cleaned one by one by compressed air
pulses. The dust and dirt particles are collected in the dustbin
underneath the unit. Depending on the PLC setting, cleaning
takes place both online and offline
Online filter cleaning
The first pulse takes place immediately after the fan starts
running. After each 30 minutes of running time of the system,
one of the filter cartridges is cleaned by a compressed air
pulse. The filter cartridges are cleaned alternately.
Offline filter cleaning
As soon as the system is switched off due to the weekly timer
setting, an offline cleaning cycle starts. During this cycle, each
filter cartridge is cleaned by two compressed air pulses with an
interval of 30 minutes per pulse.
2.2.3

Pressure relief valve

I
The fan housing is provided with an adjustable relief valve to
control excess pressure in the system.
H
3

saFETy

G
general
The manufacturer does not accept any liability for damage to
the product or personal injury caused by ignoring of the safety
instructions in this manual, or by negligence during
installation, use, maintenance, and repair of the product
F
mentioned on the cover of this document and any
corresponding accessories.
Specific working conditions or used accessories may require
additional safety instructions. Immediately contact your
supplier if you detect a potential danger when using the
E
product.
The user of the product is always fully responsible for
D
observing the local safety instructions and regulations.
Observe all applicable safety instructions and
regulations.
User manual
- Everyone working on or with the product, must be familiar
with the contents of this manual and must strictly observe
the instructions therein. The management should instruct the
personnel in accordance with the manual and observe all
instructions and directions given.
- Do not change the order of the steps to perform.
- Always keep the manual with the product.
Pictograms and instructions on the product (if
present)
- The pictograms, warning and instructions attached to the
product are part of the safety features. They must not be
covered or removed and must be present and legible during
the entire life of the product.
- Immediately replace or repair damaged or illegible
pictograms, warnings and instructions.
Users
- The use of this product is exclusively reserved to authorised,
trained and qualified users. Temporary personnel and
personnel in training can only use the product under
supervision and responsibility of skilled engineers.
1. Also refer to section 4.9
2. Offline cleaning is more effective than online cleaning, but will not take place in
case of non-stop shift work.
.
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EN - 4