Baxi Assure Combi 36 LPG Installation And Service Manual page 38

5 Before installation
38
Important
In instances where the mains water supply incorporates a non-re­
turn backflow prevention device, or any other device that includes
one*, it is possible for a build-up of pressure to occur. This may re­
sult in damage to the boiler and other appliances. To prevent
damage to the boiler it is strongly recommended that a suitable
mini expansion vessel is fitted on the mains water inlet between
the boiler and the non-return device.
*(The manufacturer of the device should be consulted if there is
any doubt regarding the presence of a non-return feature).
Even in circumstances where a non-return device is not fitted any
future modifications to the mains inlet (e.g. fitting of a water meter)
should be considered and an expansion vessel fitted. Baxi cannot
accept any responsibility for damage to the boiler if these
recommendations are not followed.
The boiler's maximum working mains pressure is 8 bar, therefore all pipe­
work, connections, fittings, etc. should be suitable for pressures in excess
of 8 bar. A pressure reducing valve must be fitted for pressures in excess
of 8 bar. The manufacturer of any outlet fittings, such as a shower valve,
may require a lower maximum pressure. The pressure reduction must take
account of all fittings connected to the DHW system.