AERCO Esteem O&M Manual - Manual (Page 28)

22
System Piping - Special Application
1. Esteem 399 Low NOx boiler
2. water heater
3. Isolation valve
4. DHW circulator
5. CH circulator
6. Flow/check valve
7. Pressure relief valve
8. Drain/purge valve
Figure 9: DHW Boiler Piping with an Esteem 399 Low NOx
N
OTICE
The boiler system piping shown in
Figure 8 must be a “closed” system
to avoid any oxygen contamination
and potential failure of the outer tank
of the water heater.
GF-125