Navien NFC-175, Руководство по установке и эксплуатации

Страница: 106 / 124

106 Appendixes
8. Remove the Gas Orifice, ensure that the packing is properly
seated inside the port, and then install the new Gas Orifice for
use with LP gas. Ensure that the Orifice is properly seated on
the packing inside the port before proceeding to the next step.
Packing
9. Replace the gas valve outlet adapter to its original position and
use all screws to secure all connections.
Note
Do not overtighten as this may damage or crack
the components.
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
103.
Propane Gas 1-ON
2&3
High
Altitude
0-1,999 ft
(0-609m)
2-OFF,
3-OFF
2,000-5,399 ft
(610-1,645m)
2-ON,
3-OFF
5,400-7,699 ft
(1,646-2,346m)
2-OFF,
3-ON
7,700-10,100 ft
(2,347-3,078m)
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
●
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 Switches
should be set as described above.
●
High Altitude: Above 2,000 ft (610 m), the unit will de-
rate by 3% for each 1,000 ft (305 m) of altitude gain.
●
For NG, 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 LP.
●
Note that the Gas Orifice from the LP CONVERSION
KIT covers the boiler’s installation at an altitude of 0 to
10,100 ft.
CAUTION
Ensure that the High Altitude setting reflects the actual
location of the boiler. If not, it may cause personal injury or
malfuction of the boiler.
DANGER
●
When conversion is required, be sure to set the PCB DIP
switch 2 #1 according to the supply gas type.
●
For NG, use the Gas Orifice for high altitude when the boiler
is installed at above 5,400 ft, and be careful not to confuse it
with the Gas Orifice for LP.
●
For High Altitude conversion, check the DIP switches setting
value by altitude before setting.
●
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.