
56
R2K 55 - RAD - ING - Inst.Manual - 2002.1_CSA
2. MAINTENANCE
SUPPOR
T CENTER
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. HEAT EXCHANGER
3. BURNER UNIT
4. COMBUSTION BLOWER
5. AIR ELIMINATOR
6. CIRCULATOR
7. GAS VALVE
8. PRESSURE RELEIF VALVE 30 psi (2 bar)
9. SYSTEM DRAINING TAP
10. CENTRAL HEATING TEMPERATURE PROBE
11. WATER TEMPERATURE HIGH LIMIT SWITCH
12. AIR SUCTION TUBE
13. D.H.W. EXCHANGER
14. PROPORTIONAL VENTURI
15. DOMESTIC TEMPERATURE PROBE
16. CONDENSATE COLLECTION SIPHON
17. BY-PASS
18. WATER PRESSURE SWITCH
19. DIVERTER VALVE
20. FLOW SWITCH
21. CHECK VALVE
22. FLOW LIMITER
23. SYSTEM FILLING TAP
R
A
G
1
2
3
4
6
5
10
11
12
14
15
5
23
sc
13
C
8
7
17
18
20
21
22
19
16
9
MAINTENANCE
fig. 35