Ferroli TEMPRA 30 Installation, Service And User Instructions Manual page 10

Central Heating
Detailed recommendations are given in BS6798, BS5449, BS6700 and CP342 Part 2. Pipework not forming part of
the useful heating surface should be insulated to prevent any heat losses or possible freezing (i.e. in roof spaces
or ventilated underfl oor spaces). Drain taps should be positioned at the lowest point of the system in accessible
locations to permit the whole system to be drained down. The drain taps should be in accordance with
BS2879. Copper tubing to BS2871, Part 1 is recommended for water carrying pipework.
horizontal runs should have a gradient where possible to facilitate the removal of air.
boiler heat exchanger is not a natural point for
hot water circuit is illustrated in fi g. 9.
Important - If thermostatic radiator vales are fi tted a automatic bypass must be fi tted to ensure a minimum fl ow
rate through the boiler of 6 l/min. The bypass should be fi tted as far as possible from the boiler.
Make Up Water
Provision must be made for replacing water lost from the sealed system.
BS6798, for methods of fi lling and making up sealed systems. There must be no direct connection between
the boiler's central heating system and the mains water supply.
pressurise the system directly, is conditional upon the Local Water Byelaws.
must be disconnected after use.
Attention - is drawn to the Model Water Byelaws.
Fittings manufactured from duplex (alpha-beta) brass are not acceptable for underground use and certain water
undertakings will not accept their use above ground.
Ensure all pipework is adequately supported
NOTE: A by-pass that will ensure a minimum fl ow rate
of 6 l/min. at all all time must be fi tted as far as possible
from the boiler if thermostatic radiator valves are fi tted
thoughout.
AUTOMATIC BY-PASS
The by-pass must be capable of
passing 6 l/min of water when
all the trv's are shut down
10
TEMPRA 30
By-pass
Fig. 7
air collection. A typical heating system with domestic
The use of mains water to charge and
Gas
Pipework in
Ensure that the
Reference should be made to
Again any such connection
Additional expansion vessel C.H.
(if required)