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.
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