Pressure Relief Pipe Work; Boiler Location And Clearances; Installation; Servicing Clearances - Ventilated Compartments - Worcester GREENSTAR 24i Junior Installation, Commissioning And Servicing Instructions

PRE-INSTALLATION
3.5

PRESSURE RELIEF PIPE WORK

NOTICE:
▶ The pressure relief valve is a safety device for the
boiler and if activated may discharge boiling water or
steam through the relief valve drain pipe.
▶ Care should be taken when siting the outlet pipe so
that it does not cause an obstruction or discharge
above a window, entrance or other public access
where it could cause a hazard.
• The pressure relief drain pipe (1) from the boiler should be at least
15mm diameter copper pipe and run downwards, away from any
electrical equipment or other hazard, preferably to an external drain
or soak away.
• Pipe (1) should be finished with a partial bend, near the outlet to face
the external wall (as shown) to help prevent freezing.
1
2
3
4
Fig. 14 Pressure relief pipe work
2 Outside wall
1,3 Drain pipe
4 External drain
Table 7 Key to fig 14
3.6

BOILER LOCATION AND CLEARANCES

3.6.1 INSTALLATION

This boiler is only suitable for installing internally within a property at a
suitable location onto a fixed, rigid surface at least the same size as the
boiler and capable of supporting the boiler weight.
NOTICE:
No surface protection is required against heat transfer
from the boiler
3.6.2 SERVICING CLEARANCES -
VENTILATED COMPARTMENTS
Figure 15 shows the minimum space required to install and service the
boiler in a ventilated compartment.
• If a boiler is installed in a compartment with clearances less than
shown in the tables 9, 10, or 11 ventilation is required. Refer to
table 8 for ventilation requirements.
14
1
2
2
3
4
6720646608-123.1Wo
Vent position To room or internal space Direct to outside
High level Minimum free area 122cm
Low level Minimum free area 122cm
Table 8 Compartment ventilation
930 mm
Using 100 mm
flue kit
5 mm
1080 mm
Using 125 mm
flue kit
1100 mm
20 mm*
600 mm**
Fig. 15 Ventilated compartment
* Minimum clearance to removable door
** Minimum clearance required for servicing

3.6.3 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 the boiler is installed in an unventilated airing/storage cupboard,
there is no requirement to make a partition between the boiler and the
storage space as long as the minimum clearances around the boiler
are maintained.
• Ideally, storage should be below the boiler, where the boiler is
mounted in the upper part of the cupboard, whilst maintaining the
clearances given in tables 9, 10, or 11.

3.6.4 BOILER CLEARANCES - UNVENTILATED COMPARTMENTS:

The tables below show the options for the minimum space required to
install and service the boiler inside an unventilated compartment.
3.6.5 INSTALLATION CLEARANCES - UNVENTILATED
COMPARTMENTS
CAUTION: CLEARANCES
▶ Top and bottom clearances must not be reduced
below the values shown in table 9 as they are the
minimum clearances required for servicing.
Unventilated Compartment Installation Clearances (millimetres)
Suggested total unventilated compartment minimum clearances are:
Side Above Below
400 170 approx. 200
(30 above the elbow)
Table 9 Minimum unventilated compartment clearances
2 2
Min. free area 61cm
2 2
Min. free area 61cm
410 mm
+ 30 mm
above elbow
5 mm
200 mm
Front (to removable door)
100
6 720 802 047 (2013/05)