ACV HeatMaster 35 TC, Технический бюллетень

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DESCRIPTION
HeatMaster
©
TC
TECHNICAL
TOTAL CONDENSING: The HeatMaster TC combines the unique ACV Tank-in-Tank concept
with a dual primary circuit resulting in exceptional performance from a totally condensing
combination boiler.
Tank-in-Tank technology
ACV’s advanced implementation of thermal storage technology is tried and tested and is remarkably simple, efficient and reli-
able. At the heart of the HeatMaster TC is a stainless steel tank through which the flue tubes pass. This is surrounded by a mild
steel shell containing the primary water, which extends down to the combustion chamber and even around the flue tubes. The
burner fires onto the primary water which indirectly heats the stainless steel tank containing the hot water. As with all Tank-in-
Tanks, this is corrugated over its full height and is suspended in the HeatMaster TC by its hot and cold water connections. The
area of the heat transfer surface is therefore much greater than that of standard direct fired water heaters. A much larger
heat transfer surface means that Tank-in-Tank units recover much faster than any other kind of hot water
storage device - and keeps boiler cycling to a minimum. The high storage temperature within the inner tank also results in
exceptional hot water outputs.
Dual primary circuit technology
The HeatMaster TC primary circuit is split into two sections - a high temperature upper circuit and a low temperature lower
circuit, divided by a separation plate. The hot water storage tank is located in the upper circuit which always operates at a
temperature of between 60°C and 90°C. This is ideal for hot water production as it maintains the stored water at constantly
high temperatures, eliminating bacterial formation such as Legionellae, as well as resulting in high volume hot water produc-
tion. The down-firing flue tubes pass through the upper circuit, through the separation plate and into the lower circuit. The
primary water here operates at a temperature typically between 30°C and 60°C for heating (dependent on the heating return
temperature), perfect for condensing when working in heating mode.
Pre-heating tank technology
During hot water mode, the lower circuit operates at a much reduced temperature, typically 5°C to 20°C depending on the
cold water inlet temperature. The incoming cold water enters the lower primary circuit via a stainless steel tank which pre-
heats the domestic water prior to it passing into the upper stainless steel tank. As the pre-heating tank is wrapped around
the lower flue tubes, it is able to absorb the remaining heat from the flue gases, resulting in a fully condensing HeatMaster TC
during hot water mode either in full or part load conditions.
WORKING PRINCIPLE
cold water inlet
gas