Pressure Relief Pipework; Boiler Location And Clearances; Installation; Installation And Servicing Clearances - Worcester 27i System Compact Installation, Commissioning And Servicing Instructions

*
1
500mm min.
13
14
9
11
12
Fig. 10 Soak away
3.5

PRESSURE RELIEF PIPEWORK

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.
• The pressure relief drain 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. 11 Pressure relief pipework
[2] Outside wall
[1, 3] PRV drain pipe
[4] External drain
Greenstar i System Compact - 6 720 807 726 (2013/05)
9
10
25mm min.
400mm
min.
10
1
2
2
3
4
6720646608-123.1Wo
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 INSTALLATION AND SERVICING CLEARANCES

880mm
600mm**
5mm
400mm
Fig. 12 Unventilated compartment
[*] Minimum clearance to removable door
[**] Minimum clearance required for servicing
[***] Height for either 60/100 flue or 80/125 flue

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 fitting the boiler into an airing cupboard use a non-combustible
material to separate the boiler from the airing space.
The material can be perforated up to a maximum hole size of 13mm.
PRE-INSTALLATION
170/210mm***
20mm*
5mm
200mm
300mm
13