Winco PSS75LS/B - Manual (Page 11)

60706-173 Page 9
5234-00
There is no neutral connection point in these switches so all three
neutral leads (line neutral, generator neutral and load neutral)
should be connected together and taped up. See the prints
enclosed with UL-ATS panel for additional information.
*************
***** WARNING *****
*************
EQUIPMENT DAMAGE - The UL-ATS panels are voltage
sensitive. Do not attempt to use a 240 volt ATS on a 208 volt
system. Doing so will cause damage to the control circuits in the
ATS panel. Contact the factory if you have any concerns or
questions.
UL TRANSFER SWITCHES OTHER THAN WINCO
The WINCO engine generator set will work with almost any
automatic transfer switch on the market today . Although we are
switching the negative side of the start circuit, as long as the
transfer switch has a set of "isolated dry" contacts for the start
signal to pass through it will work. When using other transfer
switch panels refer to the installation manual received with the
switch for proper termination of wiring from the generator.
INITIAL START UP
*************
***** WARNING *****
*************
EQUIPMENT DAMAGE - DO NOT jump start these engine
generator sets. Starting these units on a low battery or jump
starting them will cause damage to the engine control module.
Use the following check list to verify correct installation before
starting the engine:
1. Engine oil. Fill as required with proper grade/qty.
2. Engine coolant. Fill as required with proper
mixture.
3. Unit mounting base properly bolted down.
4. Clearance for service and maintenance on all
sides.
5. Proper fuel line material and size.
6. All fuel line connections tight.
7. Fuel line protected and a moisture trap installed
(may be required for N.G.).
8. Correct LP/NG pressure 4-6 Oz. (7-11" Wc).
9. Battery connections clean and tight.
10. Battery fully charged.
11. All A.C. and D.C. wiring installed and properly
protected.
After completing the above checklist, the engine-generator
set is ready for the initial start-up test.
PROCEDURE
Depress the “RUN” push-button on the front of the DGC. The
engine-generator will crank and start automatically. If the engine
fails to start, depress the “stop” push-button and correct the
trouble before proceeding.
With the engine running smoothly check the no load voltage and
frequency on the digital display. The voltage should be 208/240/
480 A.C. depending on which model you have and a frequency of
59.5 To 60.5 hertz (Hz). If you have the proper voltage at the
generator the next step is to check the voltage at the generator
terminals in the Automatic Transfer Switch. The voltage between
the G1 and the G3 terminals should be the same as it was on the
generator front panel. The voltage should also be checked
between the hot terminals (G1 and G3) and the G-N to be certain
of a balanced voltage output and a solid neutral connection. The
voltage between G1 and G-N should be about 120 volts AC (277
on 480 units). The same approximate voltage should be found
between terminals G3 and G-N (120 volts AC). On three phase
panels the G2 voltage level should also be checked. ON 240
VOLT (DELTA) SYSTEMS BE SURE YOU KNOW WHERE THE
HIGH VOLTAGE "WILD" LEG IS. IT MUST BE IN THE SAME
LOCATION ON THE LINE SIDE AS IT IS ON THE GENERATOR
SIDE. (i.e. if it's on L-3 on the line side it must be on G-3 on the
generator side.
** Notice **
If for any reason during the check out procedure the voltage and
frequency are not correct, depress the “STOP” push-button and
correct the trouble before proceeding.
After verifying that the voltage and frequency are correct, depress
the “STOP” push-button. The unit should shut off with no time
delay. You are now ready to test the automatic start function.
WARNING:
If you are not utilizing a WINCO non UL A.T.S. panel, STOP
here and refer to the manual received with the switch panel
for the proper initial start up procedure. These procedures
will vary depending on which A.T.S. panel you are using.
Depress the “AUTO” push-button. Next move the selector switch
on the A.T.S. panel to the “START” position. The unit will go into
a 10 second start delay and then start up. If it fails to start at this
time, the DC interconnection wiring is incorrect. Now when the
selector switch on the A.T.S. is moved to the “DISABLE” position
the unit will go into a 5 minute cool down and then shut off. As
long as line power is still applied to the transfer switch during this
test period the A.T.S. will not transfer the load to the generator.
Next you need to test the complete system. To accomplish this
you will have to fail the incoming line power to the A.T.S. panel.
First move ATS selector switch to the automatic position and
make sure the AUTO LED is still lit on the DGC, if not depress the
"AUTO" push-button. Then fail the incoming power. All the loads
connected to the A.T.S. should now be dead. The engine
generator set will go into a 10 second start delay. At the end of
the start delay the unit will start up. As soon as the engine
generator set reaches operating speed the generator side
contactor will close and the load will be applied to the engine
generator.
Restoring the line power will cause the generator side contactor
in the A.T.S. to open and the line side to close as soon as the
generator side is open. This sequence is controlled by the
electrical and mechanical interlocks in between the two contac-
tors in the A.T.S. panel. These interlocks ensure that you get a