Dimplex BUH19BWS Operating Instructions Manual

Model: BUH19BWS

Dimensions

(millimetres)

General

This heater has been designed for fitting in the space behind
the plinth of floor standing kitchen units or other fitted
furniture units. It is recommended that the heater is not
installed under cupboards used for storing perishable goods.

This heater may be fitted in place of or in additio n to existing
radiators. Using the hot water from the central heating
system and a powerful electric faint will produce an average

2.0kW of heat into the room.

Installation

The heater is more easily fitted during the installation of new
furniture units, or in existing furniture units if they can be
temporarily moved from their position against the wall. If an
existing furniture unit cannot be moved, then it may be
necessary to remove the back of the unit in order to gain
access to carry out the wiring installation.

Before installing the unit consider the location with respect to
the following:

• The product has a depth of 395mm, the length of the
valves and flexible cable should also be taken in to
consideration.

• The electrical supply and cable length.

• Position of system pipework and flexible hose length.

• Position the heater to deliver heat effectively without

causing personal discomfort from overheating while
standing at work surfaces etc.

• If the overhang above the heater is greater than 75mm,
then a distance of at least 100mm must be maintained
between the overhang and the uppermost part of the
heater (see Fig. 1 below).

Fig. 1

Hydronic Base Unit Heater

Installation and Operating Instructions

08/18304/2 (30/04/09) Issue 2

THESE INSTRUCTIONS SHOULD BE READ CAREFULLY AND RETAINED FOR FUTURE REFERENCE

IMPORTANT SAFETY ADVICE

When using electrical appliances, basic precautions
should always be followed to reduce the risk of fire,
electrical shock, and injury to persons, including the
following:

• WARNING THE SURFACES OF THIS HEATER CAN BE

HOT

• This appliance is not intended for use by children or

other persons without assistance or supervision if
their physical, sensory or mental capabilities prevent
them from using it safely. Children should be
supervised to ensure that they do not play with the
appliance.

• If you use this heater in conjunction with an external

thermal control, a programme controller, a timer or any
other device which switches the he at on auto matically,
observe all safety warnings AT ALL TIMES since a fire
risk exists when the heater is accidentally co vered or
displaced.

• The installation of this product should be carried out

by an electrician or competent person and be in strict
accordance with the current IEE Wiring Regulations
and relevant Building Regulations.

• NEVER cover or obstruct in any way the heat outlet

slots at the front of the heater or the air inlet slots at
the top and rear of the heater.

• DO NOT cover the heater – Do not place material or

garments on the heater or obstruct the air circulation
around the heater

• Before connecting the heater check that the supply

voltage is the same as that stated on the heater.

• The heater must be installed in accordance with these

instructions.

• The heater should be installed and operated in the

horizontal position as shown in diagram above.

• The heater should be positioned in accordance to the

clearances stated in these instructions.

• DO NOT locate this heater immediately beneath a fixed

socket outlet.

• This appliance must be earthed.

Depth does not
include valves
and flexible pipe

Ensure
air inlet
grille is

clear

Central heating design system

1. When fitting the appliance onto a central heating
system check that the boiler is capable of delivering
extra heat into the appliance by resizing the system.
The appliance will add an average of 2kW (6,830
Btu/Hr) onto the boiler sizing.

2. Due to the low water content of the heat exchanger
in the appliance compared to a panel radiator
system, an adequate flow of water should be
maintained to compensate for rapid cooling of the
water as it passes through the exchanger i.e.
maximum efficiency is gained if the appliance is
placed as near to the boiler as possible to give the
maximum pressure head across the appliance.

Installation procedure

Ensure that all packing items are removed (read any warning
labels carefully). Retain all packing for possible use, in the
event of moving or returning the heater to your supplier.

Cutting the aperture in the plinth

Cut aperture in furniture unit plinth to dimensions shown.
This must be positioned so that the minimum distance from
the bottom of the aperture to the top surface of any floor
covering is not less than 12mm and not more than 25mm
(see Fig. 2).
If an overhang above the heater is greater than 75mm, then
a distance of at least 100mm must be maintained between
the overhang and the uppermost part of the heater.

Water Connections

WARNING: Do NOT connect electricity supply when making

water connections.
Connect the flexible pipes to the system flow and return

pipes.
The appliance terminates in 15mm pipe tails (top pipe flow –

bottom pipe return). Connect the valve ends of the flexible
pipe to the rear of the appliance. (Note: The direction of flow
arrows on the valves are not significant in this application. )
(see Fig. 3).

Fig. 3

Fill and vent the system and bleed the air out of the heat.
exchanger using the bleed screw provided (located at the top

of the flow pipe).(see Fig. 4).

Fig. 4

Close the vent and check the appliance for water leaks. If
any water escapes from the bleed screw ensure ensure it
does not fall onto any electrical wiring or connections. After
bleeding the appliance ensure that electrical controls are
completely dry before connecting to the power supply.

Power supply connection

WARNING: THIS APPLIANCE MUST BE EARTHED

This heater must be used on an AC~ supply only and the
voltage marked on the heater must correspond with the
supply voltage.

The installation of this appliance should be carried out by a
an electrician or competent person in strict accordanc e with
the current IEE Wiring Regulations and relevat Building
Regulations.

Before undertaking installation work, ensure the electricity
supply is disconnected from any relevant wiring.

The appliance is fitted with 2 meters of flexible cable 3 x

0.75mm² for electrical connection. The cable may be used to
connect the heater to the fixed wiring of the premises
through a suitable connection box. The supply circuit to t he
heater must incorporate a double pole isolating switch having
a contact separation of at least 3mm. The power supply
cable should be routed through the plinth space to the
connection box, ensuring that the cable is left with enough
slack to allow removal of the appliance for maintenance. The
cable must be protected from any sharp edges.

Fitting the rear support bracket

The heater is supplied with a rear support bracket. Fit to the
back of the appliance with the two black screws supplied.
Adjust the rear support bracket so that the vertical distance
from the underside of the appliance to the bottom of the rear
support bracket equals the vertical distance from the floor in
the cupboard space to the bottom of the aperture opening.
The slots in the rear of the support bracket allow it to be
adjusted to the required height.

Fig. 2 (all dimensions in mm)