Dru Style 3, Instructions For Installation And Operation Manual

Foreword

Dear Customer,

We would like to thank you for buying this DRU prod-
uct. Our products have been designed and produced to 
meet the highest possible quality, performance and safety 
requirements, allowing you to enjoy years of problem-free 
use. 

In this booklet you will find instructions for the installation 
and use of your new appliance. Please read these instruc-
tions and the manual carefully to familiarize yourself with 
the appliance. If you require any further support, please do 
not hesitate to contact your supplier. 

Unpacking

Once the heater has been unpacked, all packaging should 
be disposed of in the regular manner.

Connection

This appliance should be connected by a registered install-
er.

InstructIons for InstallatIon

Type of gas

This appliance can only be used and is only suitable for the 
country and the type of gas mentioned on the type iden-
tification tag. Please check that the local gas and pressure 
correspond with the specifications on the type identifica-
tion tag. All regulations regarding gas installation, including 
any local regulations, must be observed at all times. The 
appliance is to be installed by a competend person.

To operate the heater on propane, it should be converted 
by a competend person. A conversion set can be ordered 
through your supplier.

Important

• Keep curtains and any other flammable materials at least 

50cm away form the appliance.

• Caution! Touching the heater when hot can cause burns 

and blisters!

• The appliance should be installed and maintained by a  

registered installer.

• Do not install any so-called dust filter on or under the 

casing.

• Do not hang wet clothes and towels etc. on the heater to 

dry.

General

The appliance can be mounted either on a wall of incombu-
stible material (e.g. stone or concrete) or on a wall of com-
bustible material (e.g. wood). 

Style 3,4 and 5 on propane (G31) can be placed in vehicles 
pulling mobile units, provided the following is observed:
•  When the appliance is working, the mobile unit must be 

standing still;

•  When the vehicle pulling the mobile unit is being filled 

with fuel, the appliance must be switched off;

•  If glass is broken, switch off the appliance and contact an 

installer;

•  In case of a gas leak, switch off the appliance as well as the 

gas supply tap and contact an installer;

•  Flue gas discharge must remain unobstructed at all times.

Installation to a wall of non-flammable material 

(fig. 6, 8, pg. 58, 59)

The models are suitable for hanging installation only. Allow 
at least 1 metre’s clearance above the heater to enable 
sufficient heat circulation. When installed hanging, at least 
1 m free space should be kept above the appliance to 
allow sufficient heat dissipation. When intalled standing, 
the bottom of the mounting sheet (2) should stand on the 
floor, this is the minimum height between the floor and 
centre of wall duct (size F. fig 6, 8, pg. 58, 59).

The mounting plate (2) serves as a template to mark the 
position of the duct. To be able to hang the casing over 
the interior, a minimal clearance of 25 mm must be allo-
wed between the appliance and a windowsill or suchlike. 
The minimum clear installation height (Y) required for 
each of the various models is listed in the table on page 
60.

The standard wall duct

Drill a horizontal hole in the wall, ø E to take the air-sup-
ply pipe. The wall duct should slope at an angle of approx. 
2º.

The standard wall duct is suitable for walls with a thick-
ness of 50 – 330 mm and the standard extended wall duct 
for walls with a thickness of 50 – 600 mm. Depending on 
the thickness of the wall, the inlet and outlet pipes should 
be made to length, i.e.:

Length of inlet pipe 

Length of outlet pipe

STYLE 3 

Thickness of wall  + 20mm  Thickness of wall + 40mm

STYLE 4, 5 

Thickness of wall + 20mm  Thickness of wall + 30mm

The tension members fixed to the wall grid can be made 
to size after installation

Installation of the standard exterior wall duct 

(fig. 1, 3, page 57)

Slide the adjusted inlet pipe (1) through the mounting 
sheet (2), with the turned-back edge facing the mark (45º 
top left) in the mounting sheet. Slide the sealing ring (3) 
and the wall ring (4) around the inlet pipe, paying attention 
to the order (see figure). Take the whole and slide the 
inlet pipe into the wall opening. Press the mounting 

10

INSTRUCTIONS FOR INSTALLATION