Compartment Installation & Ventilation; Flue Systems - Potterton Promax Store 24 Installation And Service Manual

If floor settlement is likely due to the weight of the
boiler, ensure that both the flueing and pipework
layouts safely provide sufficient flexibility.
If the boiler is to be fitted in a room containing a bath
or shower reference must be made to the relevant
requirements.
In GB this is the current I.E.E. Wiring Regulations and
Building Regulations.
In IE reference should be made to the current edition
of I.S. 813 "Domestic Gas Installations" and the
current ETCI rules.
1.4 Compartment Installation and
Ventilation
General guidance for cupboard/compartment
installations, including airing cupboards, is contained in
BS 6798. Specific requirements for Promax 24 Store
are given below.
1. The compartment should be a fixed rigid structure
large enough to allow it and the boiler to be
inspected and serviced. A minimum width between
the door jambs of 570 mm must be provided.
2. Minimum clearances are indicated in Fig.3. A full
height compartment door must be at least 15 mm
from the front of the boiler and provide 200 mm
access height above the boiler.
3. Householders should be discouraged from storing
clothes etc. on the boiler itself. A removable shelf at
least 75 mm above the boiler is acceptable.
4. The internal surfaces of an understairs cupboard
must be lined with non-combustible materials. The
door shall have a BS 476 fire resistance of not less
than 0.5 hour.
12
VENTILATION
1. Where the appliance is installed in a cupboard or
compartment, no air vents are required.
2. BS 5440: Part 2 refers to room sealed appliances
installed in compartments. The appliance will run
sufficiently cool without ventilation.
1.5 Flueing
This is a "room sealed" condensing boiler. Flue
systems are supplied in kits, or components can be
ordered individually from Potterton. Only Promax Store
flue components (which are designed for condensing
operation) can be used.

Flue Systems

All boilers are supplied to accept either the concentric
horizontal flue system or the Promax 80 mm dia. twin
flue system, however several flue system options are
available.
Each system is room sealed and offers a choice of
flue type and termination method, (pages 15 & 16).
• Concentric balanced flue with horizontal terminal
• Twin flue with vertical terminal *
Flue extension lengths and bends should be
purchased separately, as required.
*
These terminals must be ordered/specified separately.
© Baxi Heating UK Ltd 2015