28
Engine Adjustment
There are regional variances in the composition of natural
gas. Each home generator unit leaves the factory set for
NG operation. If the generator output voltage or frequency
measured during Initial Start-Up is outside the listed ranges,
the combustibility of the gas supplied at the installation
site may be substantially different from the fuel used at
the factory.
To adjust the engine for this difference, proceed as follows:
1. Remove four screws
A
that secure control box front
to enclosure to expose unit’s circuit breaker.
A
A
A
A
2. Connect an accurate frequency meter to line side of
generator’s main circuit breaker.
3. Ensure that the 15 Amp fuse is installed.
4. Set the generator’s main circuit breaker ON.
5. Set the generator’s system switch to AUTO.
6. Push MANUAL OVER-RIDE button on control panel.
When the engine starts, allow it to warm up for
five minutes.
7. Normal no load frequency is 62.0 to 62.5 Hz. If
adjustment is needed at no load, remove unit
side panels. Using needle nose pliers, bend spring
anchor tang
B
slowly up or down until frequency is
62.0 to 62.5 Hz.
8. Turn utility service disconnect to transfer switch OFF.
After a short time delay, transfer switch will connect
to generator.
9. Load generator to full load.
10. After load stabilizes, frequency should be
above 57.0 Hz.
11. If frequency is below 57.0 Hz, slowly adjust the
governor until frequency is above 57.0 Hz.
12. Turn service disconnect to transfer switch ON.
Transfer switch will connect to utility power after
five minutes.
13. Push and hold MANUAL OVER-RIDE button on control
panel until engine stops.
14. After the engine has stopped:
• If an adjustment was made in step 11, repeat steps
2 through 7.
• If an adjustment was not made in step 11, proceed
to step 15.
If no load frequency falls out of the no load range shown
in step 7 after full load adjustment is made, contact an
authorized service center.
15. Reinstall control panel into enclosure.
B
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