BLUEHELIX TECH RRT 24 C
11
EN
cod. 3541P250 - Rev. 01 - 07/2018
Typical System By-pass layout
fig. 18
The automatic by-pass must be installed a least 3 metres from the boiler & set to allow a minimum of 6 ltr/min through
the valve when all TRV's are closed.
Make up water
Provision must be made for replacing water lost from the sealed system. Reference should be made to BS6798, for
methods of filling and making up sealed systems. There must be no direct connection between the boiler's central heat-
ing system and the mains water supply. The use of mains water to charge and pressurise the system directly, is con-
ditional upon the Local Water Byelaws. Again any such connection must be disconnected after use. Ensure the filling
point is on the return pipe to the boiler.
Attention -
is drawn to the Model Water Byelaws.
Filling Loop in fig. 19 is supplied with boiler.
The maximum domestic water pressure for the inlet supply is 9 bar (130 P.S.I.). If the cold mains supply exceeds 5 bar
(72 P.S.I.), a water governor or pressure reducing valve must be fitted by the installer into the mains supply in an incon-
spicuous but accessible position preferably between 3 and 5 metres (10-16ft) before the appliance. Such a valve must
be approved by WRAS. The fitting of a DHW expansion vessel is also recommended.
Key
1. C.H. filling valve
2. Temporary connection
3. Cold water supply valve
4. Double check valve
fig. 19 - Filling Loop (supplied with boiler)
Gas
Hot water
Additional expansion
vessel C.H. (if required)
Filling
point C.H.
Automatic
Bypass
Cold water mains
