Dimplex AC3CN User manual

08/19239/4 - Issue 4
AC3CN Recessed Ceiling Heater / Over Door Heater
The product complies with the European Safety Standards EN60335-2-30 and the European Standard Electromagnetic Compatibility (EMC) EN55014, EN60555-2 and
EN60555-3. These cover the essential requirements of EEC Directives 2006/95/EC and 2004/108/EC

Recessed Ceiling Heater / Over Door Heater
Model: AC3CN
IMPORTANT: THESE INSTRUCTIONS SHOULD BE READ CAREFULLY AND RETAINED FOR FUTURE REFERENCE
WARNING: Ensure powercablepath doesnotcome intocontactwith internal
heater elements or fans.
Make connections as per wiring Diagram (see Fig. 3) and replace the base
cover and access cover.
Label Description
BBLOWER MOTOR
EHEATER ELEMENT
TTERMINALBLOCK
CPOWER CABLE FROM SWITCH PANEL (5 core - NOT SUPPLIED)
Connection of Switch Panel
The mains electrical supply cable and power cable to this heater (neither
supplied) should be connected as per the wiring diagram shown in
Fig. 4 (see Fig. 5 for Switch No.’s).
Label Description
1ON - OFF (Double Pole Switch)
2HALF HEAT (Single Pole Switch)
3SECOND HALF HEAT (Single Pole Switch)
TTERMINALBLOCK
CPOWER CABLE TO HEATER (5 core - NOT SUPPLIED)
MMAINS IN POWER CABLE (NOT SUPPLIED)
∗Test all switch settings once installation is complete ∗
Important Safety Advice
Warning - Disconnect from the mains supply before carrying out
maintenance.
DO NOT COVER OR OBSTRUCT the air inlet/outlet ceiling grille.
A minimum distance of 1.5 metres must be observed between the
ceiling grille and any furniture, combustible material or furnishings.
This appliance must not be installed less than 1.8 metres above the
floor.
WARNING: ENSURE THIS PRODUCT IS EARTHED.
Ensure the supply cables are of adequate current carrying
capacity and are protected by a suitable fuse.
A suitable termination to the fixed wiring of the premises must be
provided adjacent to the final position of the Switch Panel.
This heater must not be located immediately above or below a fixed
socket outlet or connection box.
This product must not be subjected to water spray or immersion and
should be mounted such that no part of it can be touched by a person
using a fixed bath or shower.
DO NOT use the heater in the immediate surroundings of a bath, a
shower or a swimming pool.
DO NOT use this heater in areas where excessive dust exists.
This product should be mounted safely into ceiling areas only.
The ceiling can be either of a plasterboard (or similar) construction,
or of suspended 600 x 600mm ceiling tiles.
DO NOT store or use any flammable materials or sprays in the vicinity
of the heater – FIRE HAZARD.
DO NOT insert any foreign objects into the heater openings.
Risk of injury, electric shock or damage to the heater may occur.
Ensure proper manual handling procedures are observed at all
times.
General
The carton contains: -
• 1 AC3CN heater
• 1 Ceiling grille assembly (frame + egg crate core)
• 1 Switch Box
ThisRecessed CeilingHeater /Over DoorHeater is arobust heaterintended
for installation into a suspended or plasterboard ceiling.
For optimum results, do not install this product in ceilings higher than 3
metres.If multipleheatersare installed, generousspacing should beprovided
between heaters to achieve an even heating distribution.
Electrical Connection
TheElectrical Connection ofthisproduct shouldbecarried out byacompetent
electrician and be in accordance with the current IEE wiring regulations.
Asuitablelocal isolating switchmust be providedinthe electricalsupplycircuit
with at least 3mm clearance on each pole.
Connection of Heater
Gain access to the terminal block
(see ‘y’ in Fig. 2) by removing the
access panel (see ’x’ in Fig. 2)
and feeding an appropriate cable
through the cable gland.
Fig. 1
Model Loading Current Voltage Weight
(kW) (amps) (volts) (kg)
AC3CN 3 13 ∼230-240 8.7
y
x
Fig. 2
Fig. 3
T
H1 H2N NL L
I
0
C
M
1 2 3
Fig. 4

1
2
Installation of Switch Panel
WARNING: The Switch Panel should not be installed in a toilet or
washroom.
The backing box (standard B.S. double gang as shown in Fig. 5) should
be rebated into a suitable wall. The box should be fitted so that the switch
panel will be flush with the wall. Suitable wall conduit should be used where
applicable to carry the cable between the heater and the switch panel.
Installation of Heater
The Installation of this product must only be carried out by a prescribed
competent person in accordance with Building Regulations and the current
IEE Wiring Regulations for electrical equipment.
This heater can either be installed into a suspended or plasterboard ceiling.
First it is necessary to ensure that 200mm of sufficient space exists above
the ceiling for the Installation of this product (see Fig. 1 and Fig. 7).
This product is designed to be suspended by threaded rod or wires/chains.
Always ensure this unit is adequately supported when installed.
Mounting of Heater
Installation in a plasterboard (or similar) Ceiling
Ahole (610x610mm) as indicated in Fig. 1 and Fig. 6 must be cut into the ceiling.
It may be necessary to fix an internal supporting frame around the newly cut
aperture in a plasterboard ceiling.
To mount the unit into the ceiling void, use lengths of threaded bar or hooks
(not supplied) screwed into the M8 threaded inserts located in the top side
of the heater (see Fig. 1 for dimensions). Adjust the height of the heater so
the air inlet/outlet panel is positioned inside the grille frame and no more than
70mm above the installed height of the egg crate grille which allows access
for future maintenance. The unit should also be positioned inside the grille
opening to achieve optimum air-flow
effect, as shown in Fig. 8.
Installation in a Bulk Head
(over doorway)
A hole (576x265mm) as indicated in
Fig.7,must becut intotheceilingpart
of the bulk head. Drop rods should
be used to mount the appliance in
such a position, as to have the base
flush with the ceiling. An access
panel should also be provided on the
front of the bulkhead. This provides
access to the top of the appliance
and the access plate for wiring the
appliance.
Installation in a Suspended Ceiling
A standard 600 x 600mm ceiling tile needs to be removed as close to
the final position of the product as possible.
There are four options for mounting the appliance in a suspended ceiling:
1. Use suitable length M8 threaded bar and screw into the threaded inserts
provided on the top of the heater - see Fig. 1 for dimensions.
2. Bendup the‘Wire Hooks’as shown inFig. 9 and usesuitable suspended
ceilingwireto suspend theheater. (Note the applianceshould bemounted
as to prevent swaying of the product during operation).
3. Without Egg Crate Grill: Use the rail brackets provided. Bend the rail
brackets as shown in Fig. 10. The appliance should be placed directly
onto the suspended ceiling structure in the desired location. Using the
screws provided screw the rail brackets onto the heater (Top Holes -
see Fig. 9) so that it grips the suspended frame (see Fig. 10) Close the
remaining space around the heater with a cut ceiling tile.
4. With Egg Crate Grill: Use the rail brackets and ceiling tile provided.
Pick a location to mount the heater. Remove the existing ceiling tile
and replace with metal tile supplied. The appliance should be placed
directly onto the metal ceiling tile. Using the screws provided screw the
rail brackets onto the heater (Bottom Holes - see Fig. 9) so that it grips
the suspended frame (see Fig. 10).
Note: Please ensure that the ceiling structure can withstand the weight of
the appliance.
Operation of Switch Panel
Switch on electrical supply (MAINS IN) to the Switch Panel.
Switching the switch marked ‘I’ (see ‘1’ in Fig. 5) energises the fan and
switches on the electrical supply to the heater.
The heat selection switches allow heat settings to be chosen as shown
below:
Settings - I Fan Only
I +
1/2Heat
I +
Full Heat
The desired setting can be obtained through switch selection.
Fig. 6
4
40mm
min.
min.
200
200mm
min.
min.
70
70mm
max.
max.
Fig. 5
Fig. 8
TOP HOLES :WITHOUT TILE
BOTTOM HOLES : WITH TILE
Fig. 9
Fig. 10
85
145
120
134
48
75
123
see Fig. 11
400
265
Access Panel
Doorway
Fig. 7

WARNING This heater is not equipped with a device to control the
room temperature. Do not use this heater in small rooms when they
are occupied by persons not capacble of leaving the room on their
own, unless constant supervision is provided.
This appliance is not intended for use by persons (inlcuding children)
with reduced physical, sensory or metal capabilities, or lack of
experince and knowledge, unless they have been given supervision
or instruction concerning use of the apppliance by a person
responsible for their safety.
Children should be supervised to ensure that they do not play with
the appliance.
Maintenance
WARNING: ALWAYS DISCONNECT HEATER FROM THE POWER
SUPPLY BEFORE ATTEMPTING ANY MAINTENANCE.
Thermal Safety cut-out(s)
The power supply to the heating elements will be interrupted if one or a
combination of the following abnormal events occur:
1. Air inlet/outlet panel is obstructed.
2. Internal ventilation is impaired due to build up of dust
and fluff.
3. Blower unit stalls.
Note : If the cut-out operates, the fan may continue to run impairing the
performance of the heater. The heater must be turned off immediately and
the cut-out(s) reset following the ‘Procedure for resetting cut-out(s)’.
Procedure for resetting cut-out(s)
Establish cause and eliminate.
You need to reset thermal cut-out(s), located behind theAir Inlet/Outlet panel
(for detail view see Fig. 11).
To reset the thermal safety cut-out, press the black reset button (see ‘g’ in
Fig. 11) on the side of the cut-out (see ‘f’ in Fig. 11) as described in steps
2 - 4 :-
Steps to reset cut-out(s)
1. Disconnect power supply.
2. Pass small flat head screwdriver through Air Inlet/Outlet panel ‘B’ to
button side of cut-out (see ‘g’ in Fig. 11) avoiding contact with element
(see ‘e’ in Fig. 11).
3. Press reset button in direction shown in Fig. 11 to reset cut-out.
(Cut-out clicks when reset)
4. Remove screwdriver carefully.
5. Turn on supply.
Ifthe cut-out continuestooperate intermittently, theheater shouldbeswitched
off and a service agent contacted.
ee
ff
gg
B
Fig. 11
DIMPLEX
MILLBROOK HOUSE
GRANGE DRIVE
HEDGE END
SOUTHAMPTON
SO30 2DF
TEL: [phone]
FAX: [phone]
WEBSITE: www.dimplex.co.uk
Republic of Ireland Tel. [phone]
[c] GDC Group Ltd,
All rights reserved. Material contained in this publication may not be reproduced in whole or in part, without prior permission in writing of Dimplex.
A division of GDC Group Ltd,
Cleaning of Heater / Switch Panel
Externaland grilleappearancecan bemaintainedby occasionallyvacuuming
or wiping with a light duster. External appearance of the Switch Panel can be
maintained by wiping occasionally with a light duster or for stain removal, a
weak soap solution can be applied with a cloth and the surface wiped dry.
Note: Care must be taken to avoid any moisture ingress into the switch
panel.
After Sales Service
Your product is guaranteed for one year from the date of purchase.
Within this period, we undertake to repair or exchange this product free of
charge provided it has been installed and operated in accordance with these
instructions.
Your rights under this guarantee are additional to your statutory rights, which
in turn are not affected by this guarantee.
Should you require after sales information or assistance with this product
please go to www.dimplex.co.uk where you will find our self help guide by
clicking on “After Sales” or ring our helpdesk on 0845 600 5111 (UK) or 01
842 4833 (R.O.I.) .
Spare parts are also available on the website www.dimplex.co.uk
Please retain your receipt as proof of purchase.