Navien NHB Series, Installation & Operation Manual

Page: 113 / 135

113 Appendixes
DANGER
Ɣ
When conversion is required, be sure to set the PCB DIP
switch 2 #1 according to the supply gas type.
Ɣ NG and LP high altitude conversion kits and a LP conversion
kit are provided with the boiler. Be careful not to confuse
the LP conversion kit and LP high altitude conversion kit.
Ɣ For high altitude conversion, check the DIP switches setting
value by altitude before setting.
Ɣ
Failure to properly set the DIP switches could cause carbon
monoxide poisoning, resulting in severe personal injury or
death.
11. Turn on the gas and water supply to the boiler.
CAUTION
Ensure that the High Altitude setting reflect the actual location
of the boiler. If not it may cause personal injury or malfunction
of the boiler.
10. Set the PCB DIP switch to change the gas type. For LP, set DIP
switch 2 #1 to ON. For NG, set DIP SW2 #1 to OFF.
WARNING
Ensure that you have turned off the power to the boiler before
accessing the DIP switches.
1 2 3 4 5 6
O
N O
N
1 2 3 4 5 6 7 8
Switch Function Setting Comment
1 Gas Type
Natural Gas 1-OFF
Refer to
Table 1
on page
110.
Propane Gas 1-ON
2&3
High
Altitude
0-1,999 ft
(0-609 m) 2-OFF,
3-OFF
2,000-5,399 ft
(610-1,645 m) 2-ON,
3-OFF
5,400-7,699 ft
(1,646-2,346 m) 2-OFF,
3-ON
7,700-10,100 ft
(2,347-3,078 m) 2-ON,
3-ON
When applying the Gas Orifice for high altitude, set the PCB
DIP switches by altitude according to the table above.
Note Ɣ
This unit may be installed at elevations up to
10,100 ft (3,078 m) for use with natural gas and
propane. To use the unit at a specific altitude. the
DIP switch should be set as described above.
Ɣ
In high altitudes above 2,000 ft (610 m), the unit
will derate by 3 % for each 1,000 ft (305 m) of
altitude gain.
Ɣ
If you install the unit at above 5,400 ft (1,646 m)
it is required to change the Gas Orifice for high
altitude.
Ɣ
NG and LP high altitude conversion kits and a LP
conversion kit are provided with the boiler. Be
careful not to confuse the LP conversion kit and
LP high altitude conversion kit.