Plymovent Junior LM-2 User manual

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
Product manual
Junior LM-2
THIS MANUAL SHOULD BE HANDED OVER
AND KEPT BY THE SERVICE DEPARTMENT
AFTER THE INSTALLATION!
Thank you for buying a PlymoVent product.
Before you unpack and put it into operation please read
this product manual, and follow the instructions.
USA/CAN
010228
Table of contents: Page:
PlymoVent Corp.
375 Raritan Center Parkway,
Edison New Jersey 08837, USA
Tel: [phone]
Fax: [phone]
PlymoVent Canada Inc.
6615 Ordan Drive, Unit # 3
Mississauga, Ontario L5T 1X2, Canada
Tel: [phone]
Fax: [phone]

LM/USA/CAN/2/13
TECHNICAL DESCRIPTION
BSAB no: T0.31
Ser.no: LM/TB
Date: Sept-97
Replace: Jan-95
Junior
LM-2
Junior LM-2
Construction and function
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°.
Technical data
AWall mounting bracket with
ball-bearings and inlet spigot Ø160 mm, 6,3".
BCounterweight and counterweight tube.
CArm bracket.
DTensioned spring.
EThree-part square-section telescopic tube with plastic bushes.
FJoints with friction pads for adjustment of tension.
GFlame-proof double skin flexible hose of PVC coated woven polyamide
with internal steel spiral. (Resistant to 85°C when in continous use).
HUniversal joint.
IHood collar with manual shut-off damper.
JHood 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".
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".
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).
Prod.
no:
Max
Length Min
Length Hose
Diameter
Recommended Airflow at
the Hood in m3/h/ cfm
800-1200 m3/h, 470-706 cfm160 mm,6,3"
1,0 m,3,3'2,0 m, 6,6'
LM-2

LM/USA/CAN/3/13
Pressure Loss
The pressure loss diagram below shows
the average
pressure loss through the LM-2.
Mounting Example
PA-110 and PA-220 mounting plate
Welding: 800-1200 m3/hr.
LM-2 wall mounting bracket dimensions
LM-2 Working Area
Wall mounted LM-2 with
standard mounting bracket. Wall mounted LM-2
with stanchion PA-110
or PA-220.
Ceiling mounted LM-2
with stanchion PA-110 or
PA-220 and separate fan.
Floor mounted LM-2 with
stanchion PA-220 and separate fan.
The following aspects
affect the pressure loss
in PlymoVent's LM-2.
:
1. The air volume.
2. The number of bends
and the extent of
these.
Pressure loss diagram
0
100
200
300
400
500
600
700
800
900
700 800 900 1000 1100 1200 1300 1400 1500
Air flow m◊/
h
Pressure loss diagram
0
0,5
1
1,5
2
2,5
3
3,5
200 300 350 400 500 580 680 760 830
Air flow cfm
Welding: 470-706 cfm.

LM/USA/CAN/4/13
ES
90
ES
90
Back draught damper
Interlink 12 V
AC 230/400 V 3
Control unit M 1000
Main
fuse
box
´Low pressure fan
ES
90
AC 230/400 V 3~
AC 230 V 1~
Interlink 12V
Control unit
M-1000
AC 230/400 V 3~
Central fan
Motorised
damper 24 V
ASE-12 ASE-12
ASE-12
Alternative System Layouts
Alt. 4
Alt. 3
Alt. 2
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.
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.
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.
*For continuous use.
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.

LM/USA/CAN/5/13
Spiral Cable
Extendable up to 3 m. To be used when installing
switch assembly for PlymoVent LM-2 and
Extractor Cranes ”Plymoth®”.
Prod. no: SK-300
Complementary Products and Accessories
Fan
Prod
no.
Airflow
CFM
Freeblowing
Motor
HP/Phase
Airflow CFM
at the hood of
the LM-2
825
825
1060
1300
1300
2000
2840
3540
FUA-1300
FUA-1301
FUA-1800
FUA-2100
FUA-2101
FS-3000
FS-4700
FA-6000
1/2 HP, 3 phase
1/2 HP, 1 phase
3/4 HP, 3 phase
1 HP, 3 phase
1 HP, 1 phase
1.5 HP, 3 phase
3 HP, 3 phase
7.5 HP, 3 phase
1 LM = 590
1 LM = 590
1 LM = 740
1 LM = 825
2 LM = 380 ea
1 LM = 825
2 LM = 380 ea
2 LM = 765 ea
3 LM = 500 ea
3 LM = 765 ea
4 LM = 560 ea
4 LM = 765 ea
5 LM = 620 ea
FS
FUA
NOTE: ALL FANS MUST BE FITTED WITH RELEVANT
MOTOR OVERLOAD (NOT INCLUDED).
Stanchion
Accessory for ceiling, floor
or wall mounting of LM-2.
Length: 3.6 ft. Prod No: PA-110.
Length: 7.2 ft. Prod No: PA-220.
Halogen Lamp Cartridge
To be fitted in the hood. Consists of 20W/24V
halogen lamp, switch assembly and 32.8 ft cable.
Must be complemented with
transformer TR-24 or starter SA-24.
Prod No. SK-20/24
Transformer
115 VAC-24V/sec. Transformer for
halogen lamp cartridge HL-20/24.
Prod No. TR-24
Control Unit
For automatic start or stop of a central fan up
to 5 HP in a system with several extractors.
To be used in conjunction with the Energy
Saver or Automatic Damper. Line supply:
115 thru 460 VAC.
Prod No. M-1000
Starter
For manual start/stop of the fan up to 5 HP via a
switch in the hood. Complete with switch assembly
and 32.8 ft cable. Built-in contactor must be fitted
with relevant fan-motor overload (not included).
Line supply: 115 thru 460 VAC.
Prod No. SA-24/75 includes 75 VA/24V
transformer for halogen lamp on one workstation.
Semi-rigid Extension Hose
For all extraction arms 6.30" in diameter. Connects
with quick-fit coupling. Flexible and adjustable,
4.92 diameter. Length 3.3 ft.
Prod No. FSL-1
Extension Hose
Ø 6.30" extension hose with quick-fit coupling for
connection to the fume extraction arm. PVC
coated woven glassfibre with inner steel spiral
support.
Hood with double magnetic foot and handle
for easy positioning.
Prod No. SLE-20, 6.6 ft in length
Prod No. SLE-30, 9.8 ft in length
Electrostatic Filters
Clean the air so efficiently (up to 99.9%) that
you may recirculate the already heated air into
the workshop. Huge energy savings. Also
excellent for filtering oilmist. Are available
in sizes up to 2950 CFM.
For more information, see technical data
for oilmist and Electrostatic Filters (EF/EFO).
Fans FUA
FUA fans are attached directly to the LM-2 mounting
bracket. Available in three sizes with freeblowing air
volumes of 825, 1060 and 1300 CFM. A unique
anti-spark impeller made from aluminium gives
maximum security. For wall- or ceiling mounted,
choose "FS"-fan stand models 1300, 1800 or
2100. In a system with more than one
extractor, we recommend the wall
mounted FS-3000, 4700 or FA-6000.
Automatic Damper
Fully automatic motor driven damper for fitting
to Ø 6.30" duct. Adjustable overrun period
between 7 seconds and 6 minutes, to cap-
ture after-fume. Inductive sensor clamp
with 16.4 ft of cable is included as stan-
dard. Line supply: 115 thru 460 VAC.
Also includes switch assembly (S-100)
for manual control from the hood.
Prod No. ASE-12
Energy Saver
For autom. start/stop of fan. Adjustable overrun
period of between 7 sec. - 6 min. Incl. inductive
sensor clamp with 16.4 ft of cable. Built-in contac-
tor for up to 5 HP fan must be fitted with relevant
fan-motor overload (not included).
Line supply: 115 thru 460 VAC.
Prod No. ES-90-005 Incl. 75 VA/24V
transformer. For one arm with light and one fan.
* Other voltages are available
* Other voltages are available
* Other voltages are available
* Other voltages are available
* Other voltages are available
* Other voltages are available

LM/USA/CAN/6/13
BSAB no: T0.31
Ser.no: LM/MA
Date: Sept-97
Replace: Jan-95
MOUNTING INSTRUCTION
JUNIOR
LM-2
Pos no DESCRIPTION
A Wall mounting bracket
B Counterweight
C LM-2
D Hood collar
E Hood
F Spigot
G Fan

LM/USA/CAN/7/13
10 mm
17 mm
6 mm
Mounting instructions
1. Bolt mounting bracket to wall.
2. Attach arm to mounting bracket.
3. Mount counter-weight (1) and tube over
counter-weight (2).
4. Adjust to the desired friction.

LM/USA/CAN/8/13
5. Pull over the rubber seal.
6. Fix flexible hose in place, using
jubilee clips as supplied.

LM/USA/CAN/9/13
For individual fan.
For central system.
7. Mount spigot Ø 160 mm, 6,3".

LM/USA/CAN/10/13
BSAB no: T0.31
Ser.no: LM/DS
Date: Sept-97
Replace: Jan-95
MAINTENANCE
INSTRUCTION
JUNIOR
LM-2
A. If the arm will not stay in the required position:
1. Loosen the hose at A.
2. Pull the extractor out to its full length and angle it horizontally. Loosen the friction
brake until the arm drops towards the floor. Tighten until it no longer drops.
3. If the arm is difficult to move sideways or moves on its own sideways, then
adjustments must be made to the friction collar. This is done by either loosening
or tightening the screw. Use an allen key.
B. If the hood will not stay in the required position:
1. Loosen the hose at B.
2. Adjust the friction (see picture) until the hood will stay in the exact position.
C. If it is difficult to extend and contract the arm:
1. Check that the telescopic tube is not damaged or dirty. If it is damaged, replace
it. If it is dirty, brush it down with a wire brush or abrasive cloth and then wipe
it clean with a cloth.
2. Check the counterweight wire. If it is damaged replace it, as per the following
intructions and diagrams overleaf.

LM/USA/CAN/11/13
To change wire
1. Unbolt the counterweight tube.
2. Loosen both jubilee clips and push the hose together in the middle of the telescopic tube.
3. Detach the counterweight.
4. Unscrew the bolt holding the hood attachment to the telescopic tube, and remove the
hood attachment carefully. Push the telescopic section together until the old wire comes
through at the lower end.
5. Put the upper end of the new wire through the eye of the old wire. Pull at the upper end
of the old wire until the new wire at the top of the tube. Pull the new wire at the top until
the eye at the lower end is in line with the hole for the bolt. Push the hood attachment
onto the telescopic tube very carefully and fasten the bolt.
6. Tie the new wire to the counterweight as before.
7. Mount the new wire as shown on picture.
8. Re-position the counterweight tube and the hose.

LM/USA/CAN/12/13
BSAB no: T0.31
Ser.no: LM/RR
Date: Sept-97
Replace: Jan-95
SPARE PART DRAWING
JUNIOR
LM-2

LM/USA/CAN/13/13
BSAB No: T3.1
SPARE PARTS LIST Ser. No: LM / RR
Date: Jan-01
Replace:
© Copyright: All right reserved. All information within this printed matter may not be reproduced,
LM handed over, copied, xeroxed or translated into another language, in any form or any means with
o
written permission from PlymoVent AB. PlymoVent AB reserves the right to make design change
s
Produkt No: Decription
A All models All models of LM
B
C
D
E
F
G
Abreviations
X = Order as requiered, state requiered length.
Pos Art. No: ABCDE FGDescription Note
1 507 947 1 LM-2/CORD WHEEL 30*6.2MM /PART
2 963900-Z 1 COUNTERWEIGHT WHEEL
3 509695-LEGO 1 COUNTER WEIGHT FOR LM-2
4 509 661 1 LM-2/COUNTERWEIGHT TUBE /PART
5 507 202 1 LM-2/ CORD GUIDE AXLE CEN/PART
6 961 920 1 LOCK WASHER
7 509653-LEGO 1 LM-2/ WALL MOUNTING BRKT./PART
8 964 213 1 COUNTERWEIGHT CORD LM-2
9 972 398 1 RUBBER COLLAR KUA, LM-2
10 951 939 1 WASHER 21x36x3 FZB
11 509 703 1 LM-2/ MAIN BRACKET /PART
12 968 941 2 FRICTION PAD 83*10*3MM
13 509 737 1 LM-2/TELESCOPIC TUBE 32MM
14 961 466 2 HOSE CLAMP SMS-168 BLACK
15 998 484 1 FLEXIBLE HOSE Ø 161MM, L=2,15M
16 509 752 1 LM-2/TELESCOPIC TUBE 25MM
17 509 760 1 LM-2/TELESCOPIC TUBE 19MM
18 506824-Z 1 UNIVERSAL JOINT
19 506535-Lego 1 PLASTIC HOOD COLLAR,COMPL/PART
20 505545-Z 1 ARMS/ DAMPER COMPLETE /PART
21 506 818 1 ARMS/ HOOD WITH SCREEN /PART
22 506 808 1 ARMS/ MESH FOR HOOD 300MM/PART
23 505 826 1 KUA/FAN, INLET 157MM /PART
24 968 057 1 TENSIONED SPRING LM-2
When ordering spare parts please quote:
•Product No. (see label) • Batch No • Description • Part No • Quantity
For example:
LM, 00040, Hood collar and ring handle, 506535-Lego , 1 pc