Installation and Operating Instructions
Universal Pilot Wire Interface Unit
Model No: RXPWIF
THESE INSTRUCTIONS SHOULD BE READ AND RETAINED FOR FUTURE USE
General Safety Advice
When using electrical appliances, basic precautions
should always be followed to reduce the risk of fi re,
electrical shock, and injury to persons, including the
following:
WARNING - This product must be installed by a competent
person or electrician in conjunction with the current IEE
Wiring Regulations and relevant Building Regulations.
DO NOT cover or obstruct the unit
DO NOT install the unit in the immediate vicinity of a
swimming pool.
DO NOT use outdoors.
NOTE that due care and consideration must be taken
when using appliances in series with a thermal control,
a program controller, a timer or any other device that
switches on the heat automatically, since a fi re risk
exists when the appliance is accidentally covered or
displaced.
86767 Issue 6
General Principle
The RXPWIF unit is designed to allow
any electrical product (electrical load
of 3kW or less) to be controlled on
a time/zone basis by a Dimplex pilot
wire programmer (for example models
RX010006 / RXPW4).
The unit converts a standard pilot wire
controller output signal into a switched
On/Off output via a 16A rated relay.
This will give the capability to control
products without built in pilot wire
compatibility (e.g. towel rails, water tank
immersion heater, etc.) on a timed basis
in conjunction with the rest of the centrally
controlled heating system.
The unit will fi t into a standard UK single
gang metal back box at least 46mm
deep.
Contents
1
3
2
Wiring Accessories (not supplied)
The pilot wire interface unit is designed to be
housed in a standard single gang (UK wiring
accessory) fl ush mounted back box at least
46mm deep. See opposite a typical example
from the MK range.
1. Fixing Kit
2. Pilot Wire Interface Unit
3. Fascia Plate (with cable bracket attached).
Product Ref: 877 ZIC
1 gang
46mm deep
(FLUSH)
Dimensions: 1 gang: 75 x 75mm
Fixing Centres: 1 gang: 60.3mm
Knockouts: 877: 1 x 25mm & 9 x 20mm
BS.4662: 1970
Wiring Schematic
L
N
E
Use 3 core fl ex (multistrand) cable
(max.wire size 2.5mm²)
Pilot Wire Interface RXPWIF
Appliance
Switched Fused
Spur
Pilot Wire
Technical Specifi cation
Power Supply - 230V AC, ±10%, 50Hz
Functioning Temperature : -25°C - 70°C
Storage Temperature : 5°C - 50°C
Consumption - 0.3VA
Max. wire size 2.5mm²
Min. wire size 0.2mm²
Max. switching load : 3kW
Operating Modes
Controller (RXPW4) Mode Appliance Function
(when linked via RXPWIF)
Comfort (ON) On (Operates an appliance thermostat if
Background (Setback) OFF
OFF OFF
Frost Protection OFF
applicable)
Pilot Wire Connection
Dimplex Wall Mounted Programmers use a pilot wire to carry a signal from the
programmer to a compatible appliance or pilot wire interface unit.
4 zone wall mounted
pilot wire controller RXPW4
Installation and Electrical Connection
WARNING - THIS PRODUCT MUST BE
INSTALLED BY A COMPETENT PERSON OR
ELECTRICIAN. ENSURE THAT THE MAINS
AND PILOT WIRE SUPPLIES TO THE UNIT
ARE ISOLATED PRIOR TO INSTALLATION.
The product is designed to be installed in a standard UK single gang
recessed wiring accessory back box - 46mm deep.
The interface unit should be wired as per the diagram above. A SUITABLE
MEANS OF ISOLATION FOR BOTH THE APPLIANCE AND THE PILOT
WIRE MUST BE PROVIDED IN ACCORDANCE WITH THE CURRENT
I.E.E. WIRING REGULATIONS. The unit can be installed to accommodate
mains cable runs to the back box from either above or below (see below).
The orientation of the back box must be such that the earthing terminal is
always towards the end that the mains cable enters. This is required to
allow easy fi tment of the pilot wire interface unit.
The appliance cable can either exit from the front via a knockout (to be created
by the installer) in the fascia plate or from the rear of the back box.
The mains cable between the Pilot Wire Interface Unit and the switched
fused spur should be sheathed fl exible cable (Max. cable size 2.5mm²).
IMPORTANT - Care should be taken with the installation of the pilot wire(s) as
when switching to background (set back) they become energised at 240V although
only at a current of less than 100mA. In every case a suitable means of isolation
must be provided for the pilot wire and marked to indicate that two sources of
supply may be present at the appliance. (See wiring shematic above).
Where pilot wires are installed separately from the appliance fi nal sub-circuit
they should be protected, double insulated and carry their own integral earth
continuity conductor.The earth conductor should be connected to the Pilot
Wire Interface at either ‘E’ ports on the green connector block (see photo 3).
Mains Cable
run (in wall)
from below.
Mains Cable
run (in wall)
from above.
Assembly Instruction (Appliance Cable exiting from the front via a knockout in the fascia
plate).
The photos show the mains cable run from the top. Rotate 180° to show cable run from bottom.
1
Pilot
Wire
1. The outer insulation on the twin and earth
cables should be stripped back. The phase
(Brown), neutral (blue) and pilot wire cables
should extend from the back box by around 90mm
and have the insulation at the end stripped back
by a maximum of 8mm.
4
2
Pilot
Wire
2. Screw the mains supply earth cable into the
back box earth terminal. The earth cable should
be kept as short as possible so not to restrict the
fi tting of the pilot wire interface unit.
5 6
3
Flying Earth Lead
3. The cables should be connected to the terminal
blocks on the unit as follows:
Mains phase to L
Mains neutral to N
Appliance phase to La
Appliance neutral to Na
Pilot wire to P
Appliance Circuit Protective Conductor ( ) to E
Care should be taken not to overtighten
screws on green connector
4. Connect the cables to the interface unit and
feed unit into back box. Guide the mains cable
into place so that they do not exert excessive
force onto the green connector blocks on the
Interface Unit.
7
7. Clamp mains cable using cable clamp on cable
retention bracket.
Screw to secure interface unit to back box.
5. Secure the interface box to the back box using
one of the 30mm screws provided in the fi xing kit.
Screw the fl ying earth lead to the lug of the back
box using 12mm screw from the fi xing kit. This
connection is vitally important as it ensures
that the interface is earthed to the back box.
9
required size. Maximum cable diameter 2.5mm²
(standard insulation).
6. Fit the cable retention bracket as shown using
the 2 side screws provided.
10
10. Screw the fascia plate to the mounting box.9. Cut fascia plate, in ‘knock out area’ to the
8. Testing - Turn on mains supply to controller
and interface unit. Set the central controller
(RPXW4) in comfort mode ‘ ‘.
The supply to the appliance should be on. Set the
Central Controller (RPXW4) to setback mode
‘ ‘. The supply to the appliance should switch
off. Care should be taken to ensure that all
necessary safety precautions are taken.
Assembly Instruction (Appliance Cable exiting from the back box).
(Photos show the mains cable and appliance cable run from the bottom.)
1b
Pilot
Wire
1b. All cables enter back box from the back.
Connect the mains earth to the back box earthing
terminal as per photo 2.
4b
2b 3b
Pilot
Wire
2b. Screw the mains supply earth cable into the
back box earth terminal. The earth cable should
be kept as short as possible so not to restrict the
fi tting of the pilot wire interface unit. The exposed
earth cable must be covered with green and
yellow PVC sleeving (not supplied).
5b
Flying Earth Lead
3b. The cables should be connected to the
terminal blocks on the unit as follows:
Mains phase to L
Mains neutral to N
Appliance phase to La
Appliance neutral to Na
Pilot wire to P
Appliance Circuit Protective Conductor ( ) to E
Care should be taken
not to overtighten
screws on green
connector
6b
4b. Connect the cables to the interface unit and
feed unit into back box. Guide the mains cable into
place so that they don’t exert excessive force onto
the green connector blocks on the Interface Unit.
7b
7b. Attach fl ying earth lead to lug on back box
with 12mm screw (included in fi xing kit).
5b. Wire mains supply, appliance and pilot wire
cables to pilot wire interface unit connectors.
8b
8b. Attach cable clamp bracket. Bracket is not
required if the installer is fi tting a fascia plate with
holes centred.
6b. Fit interface unit to back box and secure with
30mm screw (from fi xing kit).
9b
9b. Fit fascia plate using 2 x 30mm (M3.5) screws.
Fault Finder
Failure Mode Potential Causes of Failure Resolution Action
Mains supply to appliance is always on. Pilot wire from RXPW4 controller Connect pilot wire to interface.
not connected to interface.
RXPW4 controller not turned on. Turn on power to RXPW4 controller.
RXPW4 controller set in comfort mode. Turn mode on RXPW4 controller to any
other mode expect for comfort and
power to appliance should be turned off.
Interface unit is not properly earthed Check earth connection between
to mains CPC. interface unit and mains CPC.
Mains supply to appliance will not switch on. Mains phase connection onto interface Check phase and neutral connections
unit swapped with appliance phase connection. onto interface unit.
This 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
Dimplex,
Millbrook House,
Grange Drive,
Hedge End,
Southampton, SO30 2DF.
© 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.
A division of the GDC Group Ltd, Millbrook House, Grange Drive, Hedge End, Southampton SO30 2DF
Tel: 0844 879 3588
Fax: 0844 879 3583
Web-site www.dimplex.co.uk
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