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Manual - Solar hot water systems 0020009607_02
Immersion heater
The auroSTOR solar cylinders are equipped with an
additional immersion heater of 3 kW, including the
operating thermostat and energy cut-off device.The
immersion heater is situated behind the front plate. It is
designed for use in unvented cylinders and includes a
thermostat control and thermal cut out for over heat
protection.
h
Note:
In the event of a replacement, only the right
immersion heater equipped with a thermal cut
out for overheating protection may be used.
Secondary return
The water control pack has a connection for a secondary
return.
• Remove the 3/4“ dummy plug (BSP thread) from the
water control pack.
• Connect a WRAS-approved circulating pump, which
contains a non-return valve, to the water control pack
(see Fig. 5.1).
• Establish the connection to the secondary return.
5.1.2
Technical data of the auroSTOR solar cylinder
Entry
Unit
VIH S GB 200 S
VIH S GB 250 S
VIH S GB 300 S
Cylinder:
Size
l 200
250
300
Maximum water supply pressure
bar
10
Operating pressure
bar
3.5
Pressure limiting valve
bar
3.5
Expansion relief valve
bar
6.0
Hot water expansion vessel admission pressure
bar 4.0
Temperature and pressure relief valve
°C/bar
95 / 7.0
Net weight
kg
39
44
49
Weight (full)
kg
245
310
340
Height mm
1499
1789
2109
Cylinder connections:
Cold water supply
22 mm pressure pipe
Hot water connection
22 mm pressure pipe
Pressure-controlled cold water outlet
22 mm pressure pipe
Secondary return
Inches
G 3/4
Flow (boiler/solar circuit)
22 mm pressure pipe
Return (boiler/solar circuit)
22 mm pressure pipe
Electrical connections:
3 kW immersion heater (according to ENBS 60335)
230/240 V, 50 Hz
Length of the immersion heater
mm
430
Motorised 2 port valve
230/240 V, 50 Hz
Cylinder thermostat
230/240 V, 50 Hz
Thermal cut out for solar pump
230/240 V, 50 Hz
Heating coil:
Heat loss
kW/24 h
1.9
2.1
2.4
Heat up time (boiler part)
mins
21
26
30
Recovery (boiler part)
mins
13
16
21
Table 5.4 Technical data of the auroSTOR solar cylinder
h
Note!
The heat-up time is based on a primary flow
rate of 9 l/min at 80 °C.
Temperature rise from 15 °C to 65 °C
Installation 5
NOTE
The water control group used is the same as on our uniSTOR
cylinders and has a connection that can be used for secondary
circulation on those cylinders, it may also be used for the
connection of a legionella circulation pump connection.
In solar systems secondary circulation is not recommended as it
will waste energy and reduce solar gains. as it heats the cold store
area but of course can be used for the connection of a legionella
circulation pump.
.
Содержание auroTHERM VFK 900
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