Boiler Location And Clearances; Boiler Clearances; Airing Cupboard Clearances; Vented Compartments - Worcester Greenstar Highflow 440CDi ERP Installation, Commissioning And Servicing Instructions

3.6

Boiler location and clearances

• This is a floor-standing boiler and is only suitable for installing on the
floor, internally in a property
• Install onto a rigid non-combustible surface at least the same size as
the boiler and capable of supporting the boiler weight.
• The boiler is not suitable for external installation unless a suitable
enclosure is provided.
Compartments
Follow the requirements of BS6798 and BS5440 Part 2 and note:
• Minimum clearances must be maintained.
• An access door is required to install, service and maintain the boiler
and any ancillary equipment.
• If fitting the boiler into an airing cupboard use a non-combustible
material to separate the boiler from the airing space, that can be
perforated with holes up to 13mm.
3.6.1

Boiler clearances

There are several clearances to be considered when either installing or
servicing a boiler in an unventilated or ventilated compartment.
Fig. 12
item Minimum distance requirements for compartments
1 Overall height of compartment
2 Overall depth of compartment
3 Overall width of compartment
4 Height above the boiler to top of compartment
5 Depth to front of boiler (or shelf)
6 Gap between sides of boiler and compartment
7 Gap between shelf and back of compartment
Clearances
Refer to figure 12 and the table below for the minimum clearances.
Compartment clearances (mm)
item Installation
1 1450 865
2 1200 1200
3 610 610
4 600 15
5 600 600
6 5 5
1) Can be reduced to 25mm to a removable door or panel
2) Space required with removable door or panel
3) Can be reduced to 50mm on one side but maintaining the overall 200mm
minimum
6720818077 (2016/04) -
Greenstar Highflow CDi
Servicing Unventilated
900
800
800
50
1) 2)
200
3)
100
ErP
3.6.2

Airing cupboard clearances

The dimensions below show the minimum space required to install and
service the boiler within an airing cupboard.
If a compartment is built around the boiler after installation, then the
compartment must be separated from the boiler space by a
non-combustible partition as described in BS 6798.
1
Fig. 13 Airing cupboard clearances
item Minimum clearances (mm)
1 2300
2 625
3 800
4 200
1)
5 25
6 100
7 100
1) From the front of the boiler and the front of the shelf
3.6.3

Vented compartments

If the clearances available are less than those stated for an unventilated
compartment or an airing cupboard then ventilation must be provided as
described in BS 5440.
A minimum of two air vents of equal size must be fitted, one at low level
and another at high level on the same wall using the same air for
circulation.
1
Fig. 14 Venting compartments
item Boiler Air source
ErP
1 440CDi Internal room or space 310cm
ErP
550CDi
ErP
2 440CDi Outside
ErP
550CDi
3 All 100mm space between the boiler and vent
PRE-INSTALLATION
2
3
Minimum area of vent
2
2
440cm
2
155cm
2
220cm
15