54
R2K 24 - RAD - ING - Inst.Manual - 2002.1_CSA
2. MAINTENANCE
2.2.10. INTERNAL PIPING SCHEMATIC
KEY
R. CENTRAL HEATING RETURN
C. DOMESTIC HOT WATER OUTLET
G. GAS INLET
SC. CONDENSATE DRAIN
F. COLD WATER INLET
A. CENTRAL HEATING SUPPLY
1. EXHAUST SAFETY HIGH LIMIT SWITCH
2. INTEGRATED HEAT EXCHANGER
3. BURNER UNIT
4. COMBUSTION BLOWER
5. BY-PASS
6. AIR ELIMINATOR
7. CIRCULATOR
8. PRESSURE RELEIF VALVE 30 psi (2 bar)
9. SYSTEM DRAINING TAP
10. GAS VALVE
11. DOMESTIC TEMPERATURE PROBE
12. WATER TEMPERATURE HIGH LIMIT SWITCH
13. CENTRAL HEATING TEMPERATURE PROBE
14. THERMAL EXPANSION TANK
15. AIR SUCTION TUBE
16. PROPORTIONAL VENTURI
17. CONDENSATE COLLECTION SIPHON
18. DIVERTER VALVE
19. FLOW SWITCH
20. WATER PRESSURE SWITCH
21. SYSTEM FILLING TAP
22. CHECK VALVE
1
6
11
12
13
17
20
2
3
4
7
6
8
9
16
15
19
21
10
R
G
F
C
A
SC
14
18
5
22
MAINTENANCE
fig. 34
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