19
4300-00
60706-244
The automatic voltage regulator used standard on the GR150P4 is the AS440. The regulator is preset at the factory and
should never need adjustment. If you should ever need to adjust the regulator (i.e. you reconnect the generator for a dif-
ferent voltage) the only adjustment that should need to be made is the voltage pot. Below is a description of the AS440,
not all function are use on these models. Special order units may use different regulators.
VOLTAGE REGULATOR
ENGINE MAINTENANCE NOTES:
Engine oil: Use only engine oils displaying the API Certifi cation
Mark “ FOR GASOLINE ENGINES” on the container. Gasoline
engines that are converted for LPG or NG fuels MUST use oils
labeled “FOR GASOLINE ENGINES”. Do not use oils that are
specifi cally formulated for Diesel Engines only. CC or CD clas-
sifi cation oils, even when labeled Heavy Duty or for Natural Gas
Engines, ARE NOT ACCEPTABLE.
Multi-viscosity oils are recommended. SAE 10W-30 is recom-
mended for your engine from 0 degrees F (-18 degrees C)
or above. If ambient temperatures are consistently below 0
degrees F. SAE 5W-30 oil can be used Synthetic oils are not
required for Industrial or Stationary engine.
Air Filter: IMPCO F1-14.
Spark Plugs: PSI 33000562
Oil Filter: PSI# 30100345
Coolant System: Check the coolant daily or after each use, and
only when the engine is cool. Maintain the coolant level 3/4 to 1
1/2 inches below the fi ller neck seat when the coolant is cold.
****************
***** WARNING *****
****************
EQUIPMENT DAMAGE - Never remove the radiator cap when
the engine is hot and never add coolant to any engine that
has become overheated. Either can cause personal injury
and damage to the engine.
The cooling system must be fi lled with a 50/50 mixture of
antifreeze and water The use of DexCool “Long Life” (typical
orange in color) type coolant is required.
SEE THE ENGINE OPERATORS MANUAL FOR ADDITIONAL
SERVICE INFORMATION
SUMMARY OF AVR CONTROLS
CONTROL FUNCTION
DIRECTION
VOLTS
TO ADJUST GENERATOR OUTPUT VOLTAGE
CLOCKWISE INCREASES OUTPUT VOLTAGE
STABILITY
TO PREVENT VOLTAGE HUNTING
CLOCKWISE INCREASE THE DAMPING EFFECT
STAB SWITCH
TO OPTIMISE TRANSIENT PERFORMANCE
SEE TABLE ABOVE
UFRO
TO SET THE UFRO KNEE POINT
CLOCKWISE REDUCES THE KNEE POINT FREQUENCY
DROOP
TO SET THE GENERATOR DROOP TO 5% AT 0PF
CLOCKWISE INCREASES THE DROOP
VTRIM
TO OPTIMISE ANALOGUE INPUT SENSITIVITY
CLOCKWISE INCREASES THE GAIN OR SENSITIVITY
EXC TRIP
TO SET OVER EXCITATION TRIP CUT OFF LEVEL
CLOCKWISE INCREASES THE CUT OFF LEVEL
REFER TO GENERATOR WIRING DIAGRAM
FOR CONNECTION DETAILS
F2 F1 7 8
8 Z2
S1
S2
A1
A2
AS440
Trim
Droop
Volts
Stability
Selection
UFRO
Frequency
Selection
Indicator LED
Stab
60Hz
50Hz
1
2
3
Lb
La
ABCD
Stability Selection Table
No. Power
range
Response
B-D <
100kW
Slow
A-C
< 100kW
Fast
B-C 100-550kW Fast
A-B >
550kW
Fast
Hand trimmer terminals. Remove
link before fitting hand trimmer.
Link must be fitted when hand
trimmer is not required.
Exc
Trip
8 and Z2 – linked for
normal operation
