Specifications

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Safety blow off
The safety blow off valve acts as a final safety option in case of
failure of the SCWS. This is supplied incorporating a 3bar
pressure relief valve, a pressure gauge and an automatic air
vent. This must be placed within 1 meter of the appliance.
The safety blow off discharge pipework should will be 28mm
pipe work
N.B. the use of a quench coil does not affect the primary system volume and therefore
allows the system to recover and resume normal operation when the boiler has cooled
adequately. The use of the pressure blow off however will reduce the primary water
volume and drop the system pressure this will require the system to be refilled and
checked before it can be used again. Running a boiler without water in it can damage the
appliance and pumps allowed to run without water in them will quickly overheat and fail.
Back end protection
The back end protection is a three-way valve (regulated by
temperature) that improves the efficiency of the boiler, reduces
condensation and actively prolongs the longevity of the boiler. It
does this by not allowing cold water from the heating system to be
directly introduced into the boiler until a desired temperature is
reached, in this case 55°C.
The valve used is an ESBE VTC511 or equivalent.
D Improves efficiency by not robbing heat from the fire.
D Reduces boiler condensation and prolongs the life of the boiler by not allowing
water from condensation to mix with smoke particles potentially creating harmful
acids and toxins which can have detrimental effects on the boiler.
D Helps reduce tarring inside the appliance and flue
Tarring may also result from burning wet wood with a moisture content greater than 20%
MS10-11C Issue 2 15