Rotex GasSolarUnit Series Installation And Maintenance Instructions Manual page 7

Fig. 2.1.2: Schematic layout of the GasCompactUnit (GCU)
Pos./description
A Gas fired condensing boiler
B DHW stratification cylinder
C Unpressurised cylinder water
D DHW zone
E Solar zone
F Heating backup zone
G Control and pump unit RPS (Solaris accessories)
1 Cold water connection (1" male) with gravity brake
2 Hot water connection (1" male) with gravity brake
3 DHW primary exchanger; flow connection
4 DHW primary exchanger; return connection
5 Heating flow connection (1" female)
with gravity brake
6 Heating return connection (1" female)
7 Solaris flow connection (1" union nut) for GSU;
cylinder fill connection for GCU
8 Solaris return connection (Tr 32x3 male)
with valve insert
9 Connection for balancing line (Tr 32x3 male)
with valve insert
10 Flue outlet (DN 80)
11 Ventilation air connection (DN 125)
12 Sensor well for DHW cylinder sensor
13 Sensor well for Solaris return temperature sensor
14 Condensate safety overflow connection
(Tr 32x3 male)
14 a Upper fill connection (alternative: condensate
safety overflow connection, to the front -
Tr 32x3 male)
15 Condensate drain hose (on site)
16 Condensate pipe
17 Heating heat exchanger (boiler body)
18 DHW heat exchanger (DHW HE)
19 Heat exchanger for cylinder heating (CH HE)
20 Heat exchanger for solar central heating backup
(HB HE)
21 Thermal insulation sleeve for HB HE
22 Solaris flow stratification pipe
23 Heating circulation pump
24 Modulating pressure-jet gas burner
(see chapter 5)
25 Three-way diverter valve
26 Flow temperature sensor
27 Return temperature sensor
28 Flue gas temperature sensor
29 Safety valve
Blow-off line connection (3/4" female)
30 Optional connection for a diaphragm
expansion vessel (3/4" male)
42 Electronic level probe
Safety equipment
Tab. 2.1.1: Part of the GSU/GCU
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