Navien NPE-180A Installation Manual page 44

d. Fully open several hot water fixtures and set the water
heater to operate at 2-stage MAX mode (refer to
page 45). Measure the CO
If the CO values do not match Table 2 at high fire, do not
2
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.
Option 2. Using Digital Manometer
a. Open the offset pressure port by loosening the screw two
turns as shown in Figure 9.
b. Connect a manometer to the offset pressure port. For dual
port manometers, use the positive pressure side.
Model Kit Part No.
NAC-N6
NPE-150S
NAC-L6
NAC-01
NPE-180A
NPE-180S
NAC-100
NAC-02
NPE-210A
NPE-210S
NAC-200
NAC-03
NPE-240A
NPE-240S
NAC-300
Table 3. Offset value for low fire
44 Appendixes
value at high fire.
2
Figure 9
Gas Type Offset
LP -0.03 in ± 0.01 in
NG -0.04 in ± 0.01 in
LP -0.03 in ± 0.01 in
NG -0.04 in ± 0.01 in
LP -0.02 in ± 0.01 in
NG -0.04 in ± 0.01 in
LP -0.02 in ± 0.01 in
NG -0.04 in ± 0.01 in
c. Fully open a hot water fixture and set the water heater to
operate at 1-stage MIN mode (refer to page 45). 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
5
in Figure 10. Using a
the set screw no more than
counterclockwise to lower the offset value.
Figure 10
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.
12. Once the CO or offset values have been confirmed, apply the
2
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
converted to Propane fuel
Cet appareil a ete converti au Propane
Orifice Size / Injecteur:
Min. 4.5 mm to Max. 4.8 mm
Inlet Gas Pressure / Pression d'entrée du gaz:
Min. 8.0 to Max. 13.0 inches
Manifold Gas Pressure /
Pression à la tubulure d'alimentation:
Min. -0.02 to Max. -0.66 inches WC
BTU Input / Debit calorifique:
Max. 180,000 - Min. 19,900 BTUh
Conversion Kit No.: NAC-02
Figure 11. Proper Placement of Gas Conversion Labels
/ in or 4 mm Allen wrench, turn
32
1 / turn clockwise to raise or
4
This water heater was converted on
______/______/______ to ____________ gas
with Kit No. ________________________
by _________________________________
_________________________________
(name and address of organization making
this conversion, who accepts responsibility
for the correctness of this conversion)