Winco ULPSS90/D WITH DSE 7310 CONTROL (2014) - Manual (Page 19)

19 48-00 60706-51
The automatic voltage regulator used standard on all models of the PSS60 and PSS90 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 recon-
nect the generator for a different 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 Certification
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
specifically formulated for Diesel Engines only. CC or CD clas-
sification 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
recommended for Industrial or Stationary engine.
Air Filter: Both the PSS60 and the PSS90 use the same air
filter, the IMPCO F1-15.
Spark Plugs: Both units use R4LTS or R44LTS
Oil Filter: Both units use PF-35 or PF-454
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 filler 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 filled 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
FITTING AND OPERATING
©006 3 TD_AS440 AVR_03.09_04_GB
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
ADJUSTMENT OF AVR CONTROLS
VOLTAGE ADJUSTMENT
The generator output voltage is set at the factory, but
can be altered by careful adjustment of the VOLTS
control on the AVR board, or by the external hand
trimmer if fitted. If major adjustment is necessary or
you lose stability, follow the ‘ VOLTAGE SETUP
PROCEDURE ’.
Terminals 1 and  on the AVR will be fitted with a shorting
link if no hand trimmer is required. Terminals La and Lb are
linked only for special low voltage applications.
WARNING! Do not increase the voltage above the rated
generator voltage. If in doubt, refer to the rating plate
mounted on the generator case.
WARNING! Do not ground any of the hand trimmer
terminals as these could be above earth potential. Failure
to observe this could cause equipment damage.
WARNING!
If a replacement AVR has been fitted or re-setting of the
VOLTS adjustment is required, turn the VOLTS control
fully anti-clockwise before running generator.
VOLTAGE SETUP PROCEDURE
For major adjustments and replacing the AVR.
Read and understand this procedure before
attempting to follow it.
1. Before running generator, turn the VOLTS control
fully anti-clockwise.
. Turn remote volts trimmer (if fitted) to midway
position.
3. Turn STABILITY control to midway position.
4. Connect a suitable voltmeter (0-300V ac) across
line to neutral of the generator.
5. Start generator set, and run on no load at nominal
frequency e.g. 50-53Hz or 60-63Hz.
6. If the red Light Emitting Diode (LED) is illuminated,
refer to the Under Frequency Roll Off (UFRO)
adjustment.
7. Carefully turn VOLTS control clockwise until rated
voltage is reached.
8. If instability is present at rated voltage, refer to
stability adjustment, then re-adjust voltage if
necessary.
9. Voltage adjustment is now completed.
REFER TO GENERATOR WIRING DIAGRAM
FOR CONNECTION DETAILS
F F1 7 8 8 Z
S1
S
A1
A
AS440
Trim
Droop
Volts
Stability
Selection
UFRO
Frequency
Selection
Indicator LED
Stab
60Hz
50Hz
1

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 Z – linked for
normal operation