Maintenance; Appendix - Navien NPE-180A Service Manual

10.6 Maintenance

The Navien NPE-180A and NPE-240A water heaters that are used
in the DHW/heating systems should be properly maintained
and flushed on an annual basis. Please see the NPE Water Heater
Service Manual for more details regarding annual servicing and
maintenance.

10.7 Appendix

This section provides additional information to be considered
when you design a hydronic system using an NPE-180A/240A
water heater.
10.7.1 NPE-180A/240A Pressure Drop
Curve
10.7.2 NPE-180A/240A Flow Rate Graph
170 NPE Service Manual
10.7.3 NPE-180A/240A Pump P-Q Curve
ft m
NOTE
When the system uses an internal circulation pump with
●
the NPE-180A/240A water heaters, the flow rate may vary
depending on the type and capacity of the AHU in use.
If the system uses an internal circulation pump with the
●
NPE-180A/240A water heaters or pumps manufactured by
SunTherm corporation (MMVE0S4NAAA, MMVE0M4NAAA),
the flow rate will be approximately 3 GPM.
Version 2.21