Plymovent Junior LM-2 Product Manual

Product manual

Junior LM-2

Table of contents: Page:

Technical description........................................ 2

Delivery .......................................................... 2

Advantages ..................................................... 2

Technical data ................................................. 2

Construction and function ................................. 2

Handling ......................................................... 2

Hood operation ................................................ 2

Mounting example............................................ 3

Working area ................................................... 3

Pressure loss................................................... 3

Alternative system layouts................................. 4

Complementary products and accessories.......... 5

Mounting instruction ..................................... 6 - 9

Maintenance instruction ............................ 10 - 11

Spare part drawing ..................................... 12-13

Thank you for buying a PlymoVent product.

Before you unpack and put it into operation please read

this product manual, and follow the instructions.

THIS MANUAL SHOULD BE HANDED OVER

AND KEPT BY THE SERVICE DEPARTMENT

AFTER THE INSTALLATION!

PlymoVent Canada Inc.
6615 Ordan Drive, Unit # 3
Mississauga, Ontario L5T 1X2, Canada
Tel: [phone]
Fax: [phone]

USA/CAN

PlymoVent Corp.
375 Raritan Center Parkway,
Edison New Jersey 08837, USA
Tel: [phone]
Fax: [phone]

TECHNICAL DESCRIPTION

Junior

LM-2

Junior LM-2

The PlymoVent Junior, LM-2, is an efficient and versatile fume extractor, especially designed for
benchwork. Perfect for schools, small working booths and any area with a low ceiling height.
The extraction arm is based on a telescopic tube, allowing it to be extended to give a 2 m, 6,6'
working radius and compressed to 1m, 3,3'. The spring-balancing together with the external
counter-weight ensures that the hood stays exactly where you position it. The arm is fitted with a
spring-balance which enables it to be moved from a vertical to a horizontal position in one easy
movement.
The arm can be turned through 300° due to PlymoVent's renow-ned ball-bearing joint. This is fitted
together with an adjustable friction brake in the wall mounting bracket. All movement of the arm
is controlled from the hood. Extension hoses (FSL-1, SLE-20 or SLE-30) can easily be connected to
the arm after releasing the simple catch and removing the hood.

Delivery

The LM-2 is delivered complete with wall mounting bracket, arm, hose and hood with damper.

Advantages

• Precise and easy positioning thanks to the counterweight
system which balances the hood.

• Spring assisted vertical movement.

• Flexible working radius due to the ”telescopic” operation.

• Small and compact. Ideal for confined working areas
and low ceiling heights.

• The one and only benchwork extractor.

• Wide coverage – can easily be turned through 300°.

BSAB no: T0.31
Ser.no: LM/TB
Date: Sept-97
Replace: Jan-95

Technical data

Construction and function

A Wall mounting bracket with

ball-bearings and inlet spigot Ø160 mm, 6,3".

B Counterweight and counterweight tube.
C Arm bracket.
D Tensioned spring.
E Three-part square-section telescopic tube with plastic bushes.
F Joints with friction pads for adjustment of tension.
G Flame-proof double skin flexible hose of PVC coated woven polyamide

with internal steel spiral. (Resistant to 85°C when in continous use).

H Universal joint.
I Hood collar with manual shut-off damper.
J Hood constructed from sheet steel, with safety mesh and quick-fit coupling.

Hood opening Ø300 mm, 11,8". Large comfortable circular handle Ø300
mm, 11,8".

Prod.
no:

LM-2

Max
Length

Min
Length

1,0 m,3,3'2,0 m, 6,6'

Hose
Diameter

Handling

1. 360° ring handle for positioning of the

hood. Can be reached from all sides.

2. Damper control knob.

3. Quick-fit catch for simple exchange

of extension hose and hood.

4. Switch for light cartridge
(seeaccessories HL-20/24).

5. Switch for manual start/stop
of fan or damper (see accessories
SA-24, ES-90 or ASE-12).

Recommended Airflow at
the Hood in m3/h/ cfm

800-1200 m3/h, 470-706 cfm160 mm,6,3"

Hood operation

The black enamelled ano-dised metal
hood can be angled 110° forwards,
backwards and to the sides. Large,
360°, ring handle, Ø300 mm, 11,8".

LM/USA/CAN/2/13

Mounting Example

h

Wall mounted LM-2 with
standard mounting bracket.

Floor mounted LM-2 with
stanchion PA-220 and separate fan.

Wall mounted LM-2
with stanchion PA-110
or PA-220.

LM-2 Working Area

Ceiling mounted LM-2
with stanchion PA-110 or
PA-220 and separate fan.

Pressure Loss

The pressure loss diagram below shows
the average
pressure loss through the LM-2.

Welding: 800-1200 m3/hr.

Pressure loss diagram

900
800
700
600
500
400
300
200
100

0

700 800 900 1000 1100 1200 1300 1400 1500

Air flow m◊/

PA-110 and PA-220 mounting plate

The following aspects
affect the pressure loss
in PlymoVent's LM-2.
:

1. The air volume.

2. The number of bends

Welding: 470-706 cfm.

and the extent of
these.

3,5

3

2,5

2

1,5

1

0,5

0

200 300 350 400 500 580 680 760 830

LM-2 wall mounting bracket dimensions

Pressure loss diagram

Air flow cfm

LM/USA/CAN/3/13

Alternative System Layouts

Alt. 1

Central system: 3 X LM-2 with one
central FS-4700 fan.
Recommended fan per no of arms:
FS-3000: 2-3 arms.
FS-4700: 3-4 arms.
FA-6000: 4-5 arms.

Alt. 2

Central system: 3 X LM-2 fitted with ASE-12
automatic dampers, M-1000 control unit
and one central fan.
Recommended fan per no. of arms:
FS-2100: 2-4 arms.
FS-3000: 3-6 arms.
FS-4700: 4-8 arms.
FA-6000: 4-8 arms.

As every working-place is unique, the above
recommendations are only applicable for
theoretically calculated examples.

Alt. 3

AC 230/400 V 3~

Central fan

Control unit

M-1000

AC 230 V 1~

AC 230/400 V 3~

Interlink 12V

Motorised
damper 24 V

ASE-12

ASE-12

Central system: 3 X LM-2 connected
to one electrostatic filter EF type.
Recommended filter per no. of arms:
EF-2000: 1-2 arms*
EF-3000: 1-3 arms*
EF-5000: 2-5 arms*
When more stations are required the system
can be fitted with ASE-12 automatic dampers.

ASE-12

Alt. 4

Central system: 3 X LM-2 fitted with separate
fans and ES-90 energy savers, interlinked to
a control unit M-1000 for switching the
centralised low pressure fan.

See technical data sheet on energy
saver ES-90 for further information.

Back draught damper

Interlink 12 V

ES
90

*For continuous use.

ES
90

AC 230/400 V 3

´Low pressure fan

Control unit M 1000

ES
90

LM/USA/CAN/4/13

Main
fuse
box