Vaillant Solar System and auroSTOR unvented solar..., Start-Up, Maintenance And Troubleshooting Manual

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27 Manual - Solar hot water systems 0020009607_02
5.1 Installation of the solar cylinder
5.1.1 Description of the solar cylinder
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Fig. 5.1 auroSTOR function elements
Key
1 Hot water connection
2 Temperature and pressure relief valve (95 °C, 7 bar)
3 Hot water expansion tank
4 Connection for hot water expansion tank
5 Pressure-controlled cold water outlet
6 Cold water pipe
7 Pressure limiting valve (3.5 bar) with sieve
8 Expansion relief valve (one port valve, 6.0 bar)
9 Tundish
10 Cylinder drain valve
11 Sp 2 temperature sensor immersion pocket
12 Adjustable feet
13 Return (solar circuit)
14 Supply (solar circuit) 15 Return (gas fired wall hung boiler)
16 Supply (gas fired wall hung boiler)
17 Immersion heater switch
18 Safety thermostat for solar pump, set at 90 °C, connected to
solar pump; isolates this heat source if the solar control mal-
functions
19 Safety thermostat for immersion heater
20 Cylinder thermostat (20 °C - 65 °C)
21 Immersion heater
22 Safety thermostat, set to 90 °C, connected to the motorised 2
port valve; isolates the primary heat source if the domestic hot
water thermostat fails.
23 Thermostat, immersion heater
h Note!
The safety thermostat can be removed if the
solar energy system is operated using a Vaillant
auroMATIC VRS 560 in conjunction with a
Vaillant eBUS compatible boiler.
Installation 5