Navien NPE-180S Conversion Manualline page 2

DANGER
When conversion is required, be sure to set the Front
●
Panel DIP switches according to the supply gas type.
Failure to properly set the DIP switches could cause
●
carbon monoxide poisoning, resulting in severe personal
injury or death.
11. Measure and adjust the gas/air ratio.
Option 1. Using Combustion Analyzer (recommended)
a. Loosen the screw, rotate the plate and remove the
gasket to access the emissions monitoring port as
shown in Figure 7.
b. Insert the analyzer into the port (Figure 7).
Figure 7
Figure 8. Set Screw Location
The set screw is located behind the screw-on
Note
cover. This must be removed first.
d. Fully open several hot water fixtures and set the water
heater to operate at 2-stage MAX mode (refer to
page 8). Measure the CO value at high fire.
2
If the CO values do not match Table 2 at high fire, do
2
not adjust the gas valve. Check for the proper Gas
Orifice.
DANGER
Improper gas valve settings can cause severe personal
injury, death or substantial property damage.
High fire Low fire
Water
Fuel
Heater
%CO %CO
2 2
NG 8.9 9.5
NPE-150S
LP 10.2 10.8
NG 8.9 9.5
NPE-180A
NPE-180S
LP 10.2 10.8
NG 8.9 9.5
NPE-210A
NPE-210S
LP 10.2 10.8
NG 8.9 9.5
NPE-240A
NPE-240S
LP 10.2 10.8
Table 2. CO and CO value
2
(CO values must be within 0.5% of the values listed.)
2
c. Fully open several hot water fixtures and set the water
heater to operate at 1-stage MIN mode (refer to page 8).
Measure the CO value at low fire.
2
If the CO value is not within 0.5% of the value listed
2
in Table 2, the gas valve set screw will need to be
adjusted.
If adjustment is necessary, locate the set screw as
5
shown in Figure 8. Using a / in or 4 mm Allen wrench,
32
turn the set screw no more than 1 / turn clockwise to
4
raise or counterclockwise to lower the CO value.
2
Option 2. Using Digital Manometer
a. Open the offset pressure port by loosening the screw
two turns as shown in Figure 9.
Figure 9
b. Connect a manometer to the offset pressure port. For
dual port manometers, use the positive pressure side.
Model Kit Part No. Gas Type
NAC-N6 LP
NPE-150S
NAC-L6 NG
NAC-01 LP
NPE-180A
NPE-180S
NAC-100 NG
NAC-02 LP
NPE-210A
NPE-210S
NAC-200 NG
NAC-03 LP
NPE-240A
NPE-240S
NAC-300 NG
Table 3. Offset value for low fire
c. Fully open a hot water fixture and set the water heater
to operate at 1-stage MIN mode (refer to page 8).
Measure the offset value at low fire and compare it to
the values in Table 3. If the offset value is out of range,
the gas valve set screw will need to be adjusted.
If adjustment is necessary, locate the set screw as
shown in Figure 10. Using a 5 / in or 4 mm Allen
32
wrench, turn the set screw no more than
clockwise to raise or counterclockwise to lower the
offset value.
5 7
6 8
12. Once the CO or offset values have been confirmed,
2
apply the included conversion stickers to show that the
appliance has been converted to propane gas. Place this
labels adjacent to the rating plate as shown in Figure 11.
This unit has been This water heater was converted on
converted to Propane fuel
Cet appareil a ete converti au Propane
______/______/______ to ____________ gas
Ori ce Size / Injecteur:
Min. 4.5 mm to Max. 4.8 mm
with Kit No. ________________________
Inlet Gas Pressure / Pression d'entrée du gaz:
Min. 8.0 to Max. 13.0 inches
by _________________________________
Manifold Gas Pressure /
_________________________________
Pression à la tubulure d'alimentation:
Min. -0.02 to Max. -0.66 inches WC
(name and address of organization making
BTU Input / Debit calori que:
this conversion, who accepts responsibility
Max. 180,000 - Min. 19,900 BTUh
for the correctness of this conversion)
Conversion Kit No.: NAC-02
Figure 11. Proper Placement of Gas Conversion Labels
Note Manifold Gas Pressure ratings can change due
to updated orifice sizes. Please confirm new
manifold pressures approved by CSA before
production of gas conversion labels.
Navien, Inc.
20 Goodyear lrvine, CA 92618
TEL 1-800-519-8794 FAX 1-949-420-0430
www.navien.com
Offset
-0.03 in ± 0.01 in
-0.04 in ± 0.01 in
-0.03 in ± 0.01 in
-0.04 in ± 0.01 in
-0.02 in ± 0.01 in
-0.04 in ± 0.01 in
Figure 10
-0.02 in ± 0.01 in
-0.04 in ± 0.01 in
The set screw is located behind the screw-on
Note
cover. This must be removed first.
d. At high fire, do not check the offset value and never
adjust the gas valve.
DANGER
Improper gas valve settings can cause severe personal
injury, death or substantial property damage.
1
/ turn
4
Setting the Operation Mode
1. Using the Front Panel, press and hold the Diagnostics
Button for over 5 seconds until "1.TST" is displayed.
2. Press the + (Up) button once to change the display to
"2.OPR".
3. Press the Information Button once to acess the Operation
Mode menu.
4. Press the + (Up) button once to set the water heater to
opearate at 1-stage MIN ("MIN.1").
5. To set the water heater to operate at 2-stage MAX (1-stage
MAX for NPE-150S), press the + (Up) button 3 times or until
"MAX.2 (MAX.1 for NPE-150S)" is displayed.
6. To exit the Operation Mode and return the water heater to
normal operation, press the Reset button twice.
Diagnostics
Information
Reset