Operating instructions

20
Boiler Piping
2
6
5
5
4
6
12
9
8
10
11
4
4
4
4
4
4
7
Additional
Max.
[30.5 cm]
12"
Zone Load
1
Zone Load
13
6
4
4
Optional
SMART
I.F.W.H.
5
5
4
6
2
12
3
3
3
3
[30.5 cm]
9
8
10
11
4
4
4
4
4
4
Zone Load
Additional
7
6
6
M
ax.
1
2"
Z
one Load
1
4
4
O
ptional
SMART
I.F.W.H.
Fig. 7: Central Heating (CH)
System Piping - Zoning
with Zone Circulators
1. CHALLENGER boiler
2. Boiler circulator with flow check
3. Flow/check valve
4 Isolation valve
5. Zone circulator
6. Drain/purge valve
7. Pressure relief valve
8. Air separator
9. Automatic air vent
10. Diaphragm expansion tank
11. Automatic fill valve
12. DHW circulator with flow check
Fig. 8: CH System
Piping - Zoning with
Zone Valves
1. CHALLENGER boiler
2. Boiler circulator with flow check
4 Isolation valve
5. Zone valve
6. Drain/purge valve
7. Pressure relief valve
8. Air separator
9. Automatic air vent
10. Diaphragm expansion tank
11. Automatic fill valve
12. System circulator
13. DHW circulator with flow check