Bryant ASPAX1BBA015 - Manual (Page 13)

With the generator running and loads powered by
generator AC output, turn ON the utility power supply
to the transfer switch. The following should occur:
• After about six seconds, the switch should transfer
loads back to the utility power source.
• About one minute after retransfer, the engine
should shut down.
2.6 ADJUSTING THE REGULATOR
(NATURAL GAS ONLY)
Although the generator has been factory set to pro-
vide maximum power, it may be necessary in some
areas to adjust this setting. Because natural gas has
different BTU or power content across the country
the engine may not perform as designed.
If experiencing engine problems at high or full load
conditions follow these steps. It will require a fre-
quency meter to perform this procedure.
1. Turn off utility power to the main distribution
panel in the house. This can be done by switching
the service main breaker to the off or open posi-
tion.
2. Allow the generator to start before loading the
generator. Confirm the no-load frequency with
the roof open and door off is set at 63-63.5 Hz.
Transfer load to emergency circuits.
3. Turn on appliances, lights, pumps, etc., that are
on the emergency circuits in an attempt to fully
load the generator. Be cautious not to overload
the generator. Use the following chart as a guide:
4. When full load has been achieved. Connect a fre-
quency meter to the output lugs of the generator’s
main line circuit breaker.
5. The fuel regulator is fitted with two adjustment
screws. While watching the frequency meter,
slowly turn the adjustment screw clockwise or
counterclockwise one at a time until highest fre-
quency is read on the meter. Only limited adjust-
ment is available between the set pins. Under no
circumstances should any of the pins be removed
(Figures 2.1 and 2.2).
Figure 2.1 — Dual Fuel Regulators
410
Adjustment
Screw
(One Side
Only)
Set
Pin
V-twin
Adjustment
Screw
(Both Sides)
Set Pin
(Both Sides)
-
6. When the highest frequency is reached maximum
power has been set. Then turn both adjustment
screws 1/4 turn counterclockwise. Regulator is
now set.
Figure 2.2 — Placement of Regulator
Adjustment Screw
7. Turn utility power to the main distribution panel
back on. This can be done by switching the ser-
vice main breaker to the on or closed position.
Allow the generator to shut down.

Do not make any unnecessary adjustments.
Factory settings are correct for most applica-
tions. However, when making adjustments, be
careful to avoid overspeeding the engine.
If this procedure or equipment are not available,
locate the nearest Dealer and they can perform the
adjustments.
NOTE:
A service fee may be charged for this adjustment.
Section 2 — Post Installation Start-up and Adjustments
15 kW Generator
11
Unit 120 Volts 240 Volts
15 kW 108.3 amps 54.2 amps