2 3
4 5 6
7 8 9
Logic Plus
Plateswitches
3 Pole Fan Isolator
Contents
A Product Features 2
B Safety Instructions 4
C Installation Instructions 6
D Characteristics 12
E Disposal Instructions 14
F Guarantee 15
Please leave this leaflet with the
end user for future reference
41444PL Ed.3
This product is intended for use with extractor fans
with or without a timer.
It enables the fan to be isolated and subsequently
disconnected for repair or maintenance.
It has a provision for a locking device to ensure
that it cannot be accidentally switched back on.
When the switch is in the ‘off’ position, a hole at
each end of the switch actuator is exposed (fig. 1).
The lugs in the jaw of the locking device must be
fully engaged in the holes to ensure correct
operation and fitment of padlock (fig. 2).
A. PRODUCT FEATURES
B. SAFETY INSTRUCTIONS
C. INSTALLATION INSTRUCTIONS
C. INSTALLATION INSTRUCTIONS (Cont.)
1. To prevent the risk of electrocution it is
essential to turn off the mains electricity supply
before commencing work.
2. Do not work on this product live.
3. To ensure a safe installation, this product
should be installed by a competent person
(e.g. a qualified electrician) in accordance with
these instructions and the appropriate clauses
of the current edition of the IEE wiring
regulations (BS 7671).
It is essential that all connections are made as
instructed, that cables are not stressed and that
terminal screws are fully tightened.
4. The 3 Pole Fan Isolator can be Installed in
bathrooms, but only under the strictest of
conditions. It must be out of reach of any
person using the bath or shower.
For guidance see the current edition of the IEE
wiring regulations (BS 7671).
5. Ensure that all electrical connections are correct
and fully secured and the product is screwed
securely to its mounting box before turning the
mains supply on.
6. To avoid fire hazard do not exceed the
maximum rated current of the switch.
Where an earth wire is present it should be
connected to the terminal inside the box.
IMPORTANT
Refer to Safety Instructions (B), before starting
work.
1. Remove frontplate fixing screws from their
location on the back of the product.
2. Ensure the mounting box is firmly secured in
place. Minimum internal box depth - 15mm.
3. Strip back outer cable sheath and trim wires to
the appropriate length to allow cable ends to
reach terminals.
4. Carefully strip insulation by 7 - 8mm.
5. Connect the wires to the correct terminals as
indicated by the diagrams below and over
page, and the fan manufacturers instructions.
If replacing a switch, take note of original wire
and terminal positions to aid reconnection.
IMPORTANT
6. Tighten all terminal screws securely.
Carefully push wired unit back into the
mounting box, ensuring cables are not trapped
or pinched.
7. Locate and tighten frontplate fixing screws.
Do not over tighten screws, to do so may
damage frontplate or box threads.
The completed installation should be tested in
accordance with the current IEE wiring
regulations by a qualified electrician.
In case of doubt consult MK Technical Sales,
telephone 01268 563720.
on
off
isolator
ELEC
TRICIAN W
O
RK
IN
G
DO
N
O
T R
EM
OV
E
L1 L2 N
NL2L1
L1 L2 N
NL2L1
N
L
N
L (Switched)
L (Switched)
TOP
Rear view of
fan isolator
N
L
TOP
N
on
ELE
CTR
IC
IA
N
W
O
R
K
IN
G
D
O
N
O
T R
E
M
O
V
E
To Fan Unit Without Timer
(See Fan Unit Instructions)
To Fan Unit Without Timer
(See Fan Unit Instructions)
Supply
Supply
Two pole switching
for fan units
without timers
Fig. 1 Fig. 2
Holes for
locking device
11 12
13 14 15
10
16 17 18
The company undertakes to replace or repair, at
its discretion this product should it become
defective within a period of 20 years after delivery,
solely as a result of defective materials or
workmanship. Understandably, if the product has
not been installed or maintained in accordance
with the company’s instructions, has not been used
appropriately, or if any attempt has been made to
rectify, dismantle or alter the product in any way,
the guarantee will be invalidated.
This Guarantee states the company’s entire
liability. It does not extend to cover consequential
loss or damage or installation costs arising from
the defective product. This Guarantee does not
restrict or infringe the normal statutory or other
rights of the consumer.
In case of doubt consult MK Technical Sales,
telephone 01268-563720.
F. GUARANTEE
MK Electric Limited wishes to make it clear that it
owns all the original designs of the product which
it manufactures (whether or not listed in this
leaflet) and that it will take all necessary legal
action in any part of the world against any party
found to be manufacturing, distributing, selling or
otherwise dealing with any article which infringes
the company’s intellectual property in its own
products, or any other right of the company
therein.
Intellectual Property Application
Patent No 2274218
Registered Design No’s:-
2025109, 2025110, 2031388, 2031389,
2031390, 2031391, 2031392, 2031393,
2031398.
COMPLIANCE WITH E.U. DIRECTIVES
D. CHARACTERISTICS
At the end of its useful life, Product and packaging
can safely be disposed of via standard refuse
facilities.
E. DISPOSAL INSTRUCTIONS
These Switches comply with the requirements of
BS EN60947-3: 1992.
List number K4857 and K4859
Type of Equipment, 3 Pole Switch for use on AC
Single Phase Supplies
Rated Operational Voltage, U
e
= 250V
Contact gap, Minimum 4mm
Rated Insulation Voltage, U
i
= 500V
Rated Impulse Withstand Voltage, U
imp
= 4kV
Pollution degree, 3
Rated Duty:- Uninterrupted
Conventional Enclosed Thermal Current, I
the
= 10A
Rated Operational Currents, I
e
= 10A
Rated Uninterrupted Current, I
u
= 10A
Rated Making Capacity,
I = 100A
U = 262V
cos = 0.45
Rated Breaking Capacity,
I= 80A
U = 262V
cos = 0.45
Rated Conditional Short-Circuit Current, 6KA RMS
with GEC NIT16 16Amp BS88-2:1988, 550V AC
Utilization category gG, 80KA capacity fuse links.
These products conform to BS EN60947-3:1992,
are manufactured in accordance with BS EN ISO
9002 and comply with the LV (72/23/EEC)
Directive.
D. CHARACTERISTICS (Cont.)
C. INSTALLATION INSTRUCTIONS (Cont.)
To Fan Unit With
Timer (See Fan
Unit Instructions)
To Fan Unit With
Timer (See Fan
Unit Instructions)
Three pole
switching for fan
units incorporating
timers
L1 L2 N
NL2L1
N
L
L (Unswitched)
N
L (Switched)
L (Switched)
TOP
N
L
TOP
L1 L2 N
NL2L1
L (Unswitched)
N
Supply
Supply
®
It’s simply safer to say MK
™
MK Electric Limited
The Arnold Centre, Paycocke Road, Basildon, Essex SS14 3EA
Telephone 01268 563000 Facsimile 01268 563563 (UK Sales)
Facsimile 01268 563360 (International)
email: [email protected]
Web site: www.mkelectric.co.uk
All marks in this document identified with a ® or ™ symbol
adjacent to the mark are Trade Marks of MK Electric Limited
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