Winco ULPSS20B4W/A - Manual (Page 4)

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e. Always avoid hot mufflers, exhaust manifolds,
and engine parts. They can cause severe
burns instantly.
f. Installing a generator set is not a “Do-it-your-
self” project. Consult a qualified, licensed elec-
trician or contractor. The installation must com-
ply with all national, state, and local codes.
TESTING POLICY
Before any generator is shipped from the factory, it
is fully checked for performance. The generator is
loaded to its full capacity, and the voltage, current
and frequency are carefully checked.
Rated output of generator is based on engineering
tests of typical units, and is subject to, and limited
by, the temperature, altitude, fuel, and other condi-
tions specified by the manufacturer of the applicable
engines.
INTRODUCTION AND
DESCRIPTION
The package standby system is designed to au-
tomatically provide standby power to unattended
loads during electrical outages. Upon interruption
of normal electrical service, the packaged standby
system electrical control circuits will automatically
start the engine. The generator will produce electri-
cal power and the Automatic Transfer Switch (ATS)
will automatically transfer the electrical loads to the
engine-generator set. Upon restoration of normal
electrical service the emergency transfer switch will
sense return of the normal commercial power. The
Automatic Transfer Switch will transfer the load back
to the normal commercial power source. The engine
control circuits will begin a cool-down cycle, after
which the fuel supply will be shut off and the engine
ignition system disabled.
These packaged standby systems consist of two
major components:
1. AUTOMATIC TRANSFER SWITCH
A wall mounted ASCO 65 Automatic Transfer
Switch (ATS) designed for inside or outside instal-
lation. The transfer switch is UL008 approved. A
fourteen day electronic exerciser circuit is installed
in the ATS as standard equipment. The ATS also
contains the power failure sensing circuitry neces-
sary to start and stop the engine generator set. The
transfer switch is also equipped standard with a 3
second start delay, and a 5 second transfer delay
to allow the engine to warm up before transferring
the load to the generator. When the line power is
restored the ATS has a 5 minute transfer delay to
allow the incoming utility to stabilize before trans-
ferring back to line power and then an additional 
minute engine cool down delay before the engine
shuts down. Read and understand the ATS owners
manual before installing, servicing or operating the
transfer switch.
UL Automatic Transfer Switch Sizes
UNIT LINE SIDE GENERATOR
CONTACTOR SIDE CONTACTOR
ULPSS20B4W 00 AMPS 00 AMPS
200 AMPS 200 AMPS
Both the 00 amp and the 200 amp UL Switches are
available in single phase only.
2. ENGINE / GENERATOR
The engine generator set consists of a Briggs &
Stratton Vanguard, twin cylinder, four cycle air
cooled engine, model 63277-06-B. The engine
is factory equipped to run on LP or NG fuel. The en-
gine operates at 3600 rpm and frequency regulation
is maintained by the engine governor within 4 cycles
variation (62.5 Hz - 58.5 Hz) from no load to rated
load. The generator is a brushless, single bearing,
direct drive, rotating field design. The generator is
connected to the engine’s tapered (quill) crankshaft
extension. The engine generator is mounted in a
drip-proof enclosure for outside installation. Con-
nection boxes and terminal blocks are provided for
all customer connections (both AC output and DC
control). A customer supplied 2 volt 500 CCA (BCI
group 26) battery is required to complete the instal-
lation.
** NOTICE **
This unit will automatically transfer if a power outage
occurs while running in an exercise mode.