6.0 System Details
10
6.3
Bypass
1. The boiler has an integral bypass and in most
cases this should suffice. However in certain
circumstances, e.g. on systems where there is a
high resistance and TRV’s are fitted to all the
radiators it may be necessary to fit an external
by-pass. For example, a 15mm pipe between
the flow and return controlled by a valve, or an
uncontrolled radiator.
6.4
System Control
1. The boiler is designed for use in a heating
system that incorporates external controls, i.e. a
minimum of a timer device.
2. Suitable timer kits are available as optional
extras.
3. For optimum operating conditions and
maximum economy the fitting of a
programmable thermostat, such as the Baxi
Combi Controller, is recommended.
