11
2000225013B
BOILER
DRAIN
POINT
'A'
FLOW CONTROL
VALVE
HEATING
CIRCUIT
RETURN
ADDITIONAL
EXPANSION
VESSEL
(if required)
* BYPASS
(if required)
METHOD 1
METHOD 2
METHOD 3
SUPPLY STOP
VALVE
SUPPLY
PIPE
HOSE
UNIONS
SERVICING
VALVE
TEMPORARY
HOSE
HEATING
SYSTEM
HEATING
SYSTEM
TEMPORARY
HOSE
HOSE
UNIONS
SERVICING
VALVE
SUPPLY
PIPE
SUPPLY STOP
VALVE
DOUBLE CHECK
VALVE ASSEMBLY
HEATING
SYSTEM
SERVICING
VALVE
SUPPLY
STOP VALVE
SUPPLY
PIPE
HOSE
UNIONS
DOUBLE CHECK
VALVE ASSEMBLY
OVERFLOW
CISTERN
COMBINED
CHECK VALVE
AND VACUUM
BREAKER
PRESSURE
REDUCING
VALVE
4 Heating System
Diagram 4.1
9168
Diagram 4.2
4.6 Water Treatment
For optimum performance after installation, the boiler and its
associated central heating system should be flushed in
accordance with BS7593: 1992 using a cleanser such as
Sentinel X300 or X400, or Fernox Superfloc.
For long-term corrosion protection, after flushing, an inhibitor
suitable for stainless steel exchangers should be used. Examples
are Sentinel X100 and Fernox.
4.7 Draining Tap
A draining tap must be provided at the lowest points of the
system, which will allow the entire system to be drained.
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10157
* Refer to section 11.6