Navien NPE-180A2 Installation Manual page 112

This unit may be installed at elevations
Note
●
up to 10,100 ft (3,078 m) for use with
natural gas and propane.
To use the unit at a specific altitude, the
altitude setting should be configured
as described above.
High Altitude: Above 2,000 ft (610 m),
●
the unit will de-rate by 3% for LNG
Models or 4.5% for LPG models for
each 1,000 ft (305 m) of altitude gain.
For Natural gas, if you install the unit at
●
above 5,400 ft (1,646 m), it is required
to change the Gas Orifice for high
altitude. Be careful not to confuse it
with the Gas Orifice for propane gas.
Note that the Gas Orifice from the
●
PROPANE GAS AND HIGH ALTITUDE KIT
covers the water heater's installation at
an altitude of 0 to 10,100 ft.
WARNING
To prevent serious injury or death:
ALWAYS check the panel DIP switch 1 is set
●
according to the supply gas type.
For natural gas, only install the gas orifice
●
for high altitude when the water heater is
installed at above 5,400 ft.
Be careful to install the Natural Gas High
●
Altitude Conversion Kit and not to confuse
it with the Propane Gas & High Altitude
Conversion Kit.
Failure to properly install the High Altitude
●
Conversion Kit or to not use the appropriate
Altitude Settings could cause carbon
monoxide poisoning, resulting in serious
injury or death.
112 Appendixes
12. Measure and adjust the gas/air ratio.
Option 1. Using Combustion Analyzer
(recommended)
a. Open the cover of the emissions monitoring
port as shown in Figure 7.
b. Insert the analyzer into the port.
Figure 7
Water
Altitude
Heater
0 - 5,399 ft
5,400 - 10,100 ft
NPE-
150S2
0 - 10,100 ft
0 - 5,399 ft
NPE-
180A2 5,400 - 10,100 ft
NPE-
180S2
0 - 10,100 ft
0 - 5,399 ft
NPE-
210A2 5,400 - 10,100 ft
NPE-
210S2
0 - 10,100 ft
0 - 5,399 ft
NPE-
240A2 5,400 - 10,100 ft
NPE-
240S2
0 - 10,100 ft
Table 2. CO
2
(CO values must be within 0.5% of the values
2
listed.)
High Low
Fire Fire
Fuel
%CO %CO
2
Natural
8.9 9.2
Gas
Propane
10.7 11.0
Gas
Natural
8.8 8.9
Gas
Propane
10.5 10.7
Gas
Natural
8.8 8.9
Gas
Propane
10.5 10.7
Gas
Natural
8.8 8.9
Gas
Propane
10.5 10.7
Gas
and CO value
2