unvented hot water cylinders
installation and maintenance instructions
Page 14 / 17
SOLAR UNVENTED CYLINDERS
Solar cylinders have been designed specifically with Solar applications in mind. Featuring a purpose designed solar coil, which
allows maximum heat transfer of solar energy into the stored water, the cylinders are suitable for use with a wide range of solar
systems now available in the UK and Ireland and are an efficient and environmentally friendly way of providing Domestic Hot
Water. Solar cylinders also offer the benefit of mains pressure hot water – powerful showers and fast filling baths.
Solar cylinders are available in a range of sizes from 200L, 250L, 300L, 400L and 500 litres and Twin or Triple versions. Solar
cylinders are manufactured from high grade Duplex stainless steel.
Solar cylinders are designed to accept heat input from a renewable/sustainable (i.e. Solar) heat source. Where this input does
not fully meet the desired temperature a guaranteed quantity of water can be heated to an acceptable temperature by the
householders traditional heat source of gas, oil or electricity.
The Domestic Heating Compliance Guide document L1A and L1B provides excellent advice in sizing both cylinder designated
solar areas and heat exchangers to the surface area of the solar collectors. Using this guide are able to offer sizing advice for
specification.
Model
Capacity Symbol
Coil 1 Coil 2 Coil 3
Surface
m2
kW
Surface
m²
kW
Surface
m²
. kW
DIRECT
125 125DI - - - - - -
150 150DI - - - - - -
170 170DI - - - - - -
200 200DI - - - - - -
250 250DI - - - - - -
300 300DI - - - - - -
400 400DI - - - - - -
500 500DI - - - - - -
INDIRECT
125 125IN - - 0,7 16,8 - -
150 150IN - - 0,7 16,8 - -
170 170IN - - 0,7 16,8 - -
200 200IN - - 1 25,3 - -
250 250IN - - 1 25,3 - -
300 300IN - - 1,2 28,7 - -
400 400IN - - 1,4 35 - -
500 500IN - - 1,5 37 - -
TWIN
200 200TW 0,9 21,5 0,6 16 - -
250 250TW 0,9
21,5
0,7 16,8 - -
300 300TW 1,1 28,6 0,7 16,8 - -
400 400TW 1,3 33,4 0,7 16,8 - -
500 500TW 1,4 35 0,9 21,5 - -
TRIPLE
200 200TR 0,8 20,2 0,6 16 0,58 16
250 250TR 0,9 21,5 0,7 16,8 0,58 16
300 300TR 1,2 31 0,8 20,2 0,58 16
400 400TR 1,3 33,4
0,8
20,2 0,58 16
500 500TR 1,4 35 0,9 21,5 0,58 16
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