Potterton Performa 24i HE Installation And Service Instructions Manual page 18

18
Fig. 14
Fig. 15
7.0 SITE REQUIREMENTS
7.8 Flue Dimensions
The standard horizontal flue kit allows for flue lengths
between 100mm and 685mm from elbow to terminal
(Fig. 14).
The maximum permissible equivalent flue length
is: 4 metres.
NOTE: Each additional 45° of flue bend will
account for an equivalent flue length of 0.5m.
eg. 45° = 0.5m, 90° = 2 x 45° = 1m etc.
7.9 Flue Trim
1. The rubber flue trim supplied may be fitted to either
the outside wall or on the inner wall of installation.
7.10 Terminal Guard (Fig. 15)
1. When codes of practice dictate the use of terminal
guards, they can be obtained from most Plumbers'
and Builders' Merchants.
2. There must be a clearance of at least 50mm
between any part of the terminal and the guard.
3. When ordering a terminal guard, quote the
appliance name and model number.
3. The flue terminal guard should be positioned
centrally over the terminal and fixed as illustrated.
Publication No. 5111813