User Guide

9. Reverse procedure steps 1-5 to reinstall demand
regulator.
10. Reverse the procedure to convert back to natural
gas.
1.7.2 12KW AND 15KW, V-TWIN ENGINES
To reconfigure the fuel system from NG to LP,
follow these steps:
NOTE:
The primary regulator for the propane supply is NOT
INCLUDED with the generator. A fuel pressure of 11
to 14 inches of water column (0.4 to 0.5 psi) to the
fuel inlet of the generator MUST BE SUPPLIED.
1. Turn off the gas supply. (if connected)
2. Open the top and remove the front panel.
3. Remove the battery. (if installed)
4. Remove the engine air in baffle located on the left-
hand side of the battery compartment. Two M6
screws are located on top of the baffle and two M6
screws are located on the inside of the baffle towards
the back.
5. Remove the small hose clamp and hose from the fuel
regulator. It may be necessary to pry the hose off of
the brass fitting using a screwdriver to gently lift up
the hose edge.
6. Remove the small brass hose fitting from the
regulator casting.
7. Place the small fuel jet, thread side first, into the
threaded hole originally occupied by the brass hose
fitting (Figure 1.4).
8. Using a short No. 2 Phillips screw driver, thread the
small fuel jet into the regulator casting. Do not over
tighten.
9. Apply thread sealant to the threads of the hose fitting
and replace it into the regulator body.
10. Re-attach the small hose and hose clamp and tighten
as necessary.
11. Replace the engine air in baffle using the four M6
screws.
12. Identify both brass adjustment screws on the
regulator.
NOTE:
One adjustment screw can be accessed from the
front of the unit and the second can be accessed
from the back of the unit enclosure by removing the
plastic hole plug. The screw can be turned with a
long flat blade screwdriver.
13. To adjust the system to run on LP fuel, turn BOTH
adjuster screws 1/2 TURN CLOCKWISE. The
system should now be set for maximum power and
best performance. DO NOT, UNDER ANY
CIRCUMSTANCES, REMOVE THE SET PINS
FROM THE REGULATOR HOUSING. THIS WILL
VOID THE WARRANTY.
14. It may be necessary to make minor adjustments to
the preset adjustment screw settings to achieve
maximum power, particularly at higher altitudes. If
experiencing problems with the unit producing
maximum power, follow the procedure in Section 1.6
(Adjusting the Fuel Regulator).
Figure 1.4 - Demand Regulator
1.8 ENGINE GOVERNOR ADJUSTMENT
If both AC frequency and voltage are correspondingly
high or low, adjust the engine governor as follows:
1.8.1 7 KW UNITS
1. Loosen the governor clamp bolt (Figures 1.5).
2. Hold the governor lever at its wide open throttle
position, and rotate the governor shaft clockwise as
far as it will go. Then, tighten the governor lever
clamp bolt to 70 inch-pounds (8 N-m).
3. Start the generator; let it stabilize and warm up at no-
load.
4. Connect a frequency meter (or high quality multi-
meter set to the frequency mode) across the
generators AC output leads.
5. Turn the speed adjust nut to obtain a frequency
reading of 63 Hertz.
Figure 1.5 — Engine Governor Adjustment
Single Cylinder Engines
◆
◆
BRA
SS
H
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FITTIN
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IDLE
C
IR
CU
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P
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TAP
1
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NP
T
BRA
SS
H
OS
E
FITTIN
G
F
U
EL H
OSE
S
MAL
L
F
U
EL
J
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T
RE
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LAT
OR
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OUS
IN
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P
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AD
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SC
REW
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OU
TLET P
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RT
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GOVERNOR
SHAFT
ADJUST
SCREW
GOVERNOR
CLAMP
BOLT
Section 1 — Post Installation Start-up and Adjustments
Carrier Air-cooled 7 kW, 12 kW and 15 kW Generators
Carrier 7