Baxi Solo 2 60 RS Installation And Servicing Instructions page 9

System Details - Page 9
System Controls
For optimum operating conditions, the heating system into
which the boiler is installed should include a control system.
Such a system will comprise of timer control and a separate
room or cylinder thermostat as appropriate.
The boiler should be controlled so that it operates on
demand only.
Operation of the system under control of the boiler
thermostat only, does not produce the best results.
Pipework
The sizes of flow and return pipes from the boiler should be
determined by normal methods, according to the
requirements of the system.
It is recommended that the system is designed for an 11°C
(20°F) drop in temperature across the system.
In systems using non-metallic pipework it is necessary to
use copper pipe for the boiler Flow and Return. The copper
must extend at least 1 metre from the boiler and include any
branches. The copper pipe must not be insulated.
Fully Pumped, Open Vented Systems
Low Head Installation
Using a close couple arrangement the minimum head is as
shown in the diagram, subject to the following conditions:
1) The correct heat input.
2) The pump being adjusted to give an 11°C drop across
the boiler.
3) The pump must be fitted on the flow.
4) The pump must be fitted in accordance with the pump
manufacturer's instructions.
5) The open vent pipe must be taken up from a tee in a
horizontal section of the flow pipe.
Alternative Low Head Installation for all Solo 2 RS
If less height is available then a combined vent and feed
pipe may be connected. This must be a minimum of 22mm
diameter. It is recommended that an air separator is fitted
when using a combined feed and vent pipe.
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