The room must be dry and protected from frost.
With condensing boilers pluming at the flue is a normal occurrence.
Any combustible material near to the boiler or its flue system and water pipe-work must
be protected to ensure it does not exceed 65
0
C.
In certain locations the flue outlet may be susceptible to high winds or air turbulence
which may create a negative flue pressure. Flue terminal outlets in such exposed
conditions should be avoided. When operating at low fan speeds flame lift may occur.
This can be overcome by raising the minimum fan speed.
The Ethos 28cc may be installed on the inner face of an external wall and some internal
walls providing they are flat, vertical, of a non-combustible material and are capable of
supporting the weight of the boiler and any other ancillary equipment.
Where installation will be in an unusual location, special procedures may be necessary.
Detailed guidance on this subject can be found in BS. 6798.
15.1 Timber Framed Dwellings
When installing the boiler into a timber framed dwelling, it must be fitted in accordance
with the British Gas publication ‘Guide for Gas Installations in Timber Framed Housing’
ref. DM2.
For further advice contact the Mikrofill Technical Helpline.
16. Hydraulic Connections
16.1 First Fixing Pipe-work
All the pipe-work and wiring connections enter at the bottom of the unit. To ensure a tidy
installation it is important to consider at the first fixing stage the order you arrange the
pipe-work and if applicable any electrical trunking. Figure 7 shows the order in which to
fix the pipe-work.
16.2 Type ‘H’ Connections
