Generac Power Systems GTS "W" Owner's Manual page 19

3.17.4 ENGINE COOL DOWN TIMER
Provides a time delay between automatic re-transfer
back to the NORMAL source and engine shutdown. This
permits internal engine-generator temperatures to sta-
bilize at "no-load" prior to shutdown. Set timer between
1 and 30 minutes; factory set to about 10 minutes.
The actual time interval between re-transfer back to
NORMAL and generator shutdown, is the time
remaining on Engine Minimum Run timer or time
setting of the Engine Cool Down Timer, whichever is
longer.
3.17.5 STANDBY VOLTAGE SENSOR
After engine starts automatically, the system does not
transfer LOAD to STANDBY power source until genera-
tor AC output voltage has reached the setting of this sen-
sor. Factory set to about 95% of the nominal rated volt-
age, but you can reset between 85% and 95% of the
unit's rated voltage.
3.17.6 STANDBY FREQUENCY SENSOR
This adjustment allows the installer or operator to
select the minimum required frequency of the standby
power source. It is adjustable between 80-90%. Factory
set to 90%.
3.17.7 SIGNAL BEFORE TRANSFER TIMER
If you select this function, this timer will control the
amount of time signal remains active. Timer is
adjustable from 1 to 30 seconds; factory set to about 10
seconds.
The "Signal Before Transfer" feature provides a time
delay that allows elevators to continue operating
before transfer to another power supply occurs.
3.17.8 TIME DELAY NEUTRAL
This timer holds the transfer mechanism's main con-
tacts in the "Neutral" position for the time you have
selected. "Neutral" is the main contacts position where
the LOAD is disconnected from both UTILITY and
STANDBY power supplies. Timer is adjustable from 0.1
and 10 seconds; factory set to about 5 seconds.
3.17.9 CALIBRATION MODE SWITCH
This switch has three positions, identified as "STDBY",
"OFF" and "UTIL ". The switch allows the installer or
operator to calibrate the circuit board to the existing
generator set output voltage and to the existing UTILITY
power source voltage. The board must be calibrated to
both power source voltages in order to initiate transfer
and re-transfer at the correct voltages. To calibrate the
circuit board to the correct voltage, see "Calibrating the
Circuit Board."
NOTE:
NOTE:
Section 3 — Operation
Generac GTS "W" Type Transfer Switch
3.17.10 INPHASE TRANSFER SELECT SWITCH
This switch allows the operator or installer to select
either "Inphase Transfer" or "Time Delay Neutral" oper-
ation. The switch may be positioned as follows:
• Switch at ON: Inphase transfer operation is selected.
• Switch at OFF: Time Delay Neutral is activated if
selected.
3.17.11 SIGNAL BEFORE TRANSFER SWITCH
This switch allows the operator or installer to select the
"Signal Before Transfer" feature or to turn OFF the fea-
ture. To activate the feature, set the switch to ON. To
turn off the feature, set the switch to OFF .
3.17.12 ENGINE WARMUP TIMER BYPASS
SWITCH
To bypass Engine Warmup Timer and transfer as soon
as generator voltage and frequency have reached the set-
ting of the Standby Voltage and Frequency Sensors, set
switch to ON. To place engine warmup Timer back into
the automatic operating system, set the switch to OFF .
3.17.13 TRANSFER ON EXERCISE SWITCH
For transferring LOAD to the STANDBY source during
the 7-day exercise cycle, set switch to ON. For no trans-
fer during the exercise, set switch to OFF .
3.17.14 ADVISORY LAMPS
The advisory lamps on the Inphase Control board con-
sist of 9 LED's (light emitting diodes) and include the
following:
• The four red timer lamps will turn ON when their
respective timers are activated.
• The "Inphase Transfer Selected" lamp goes ON when
Inphase Transfer Select switch is set to ON, indicat-
ing the system will operate in its "Inphase" mode (and
NOT in Time Delay Neutral mode).
• The Time Delay Neutral (TDN) Timer lamp will turn
ON when the TDN timer is running.
• The Signal Before Transfer Timer lamp will turn ON
for the duration of the Signal Before Transfer Timer,
when it is turned ON.
• Transfer to Standby Lamp goes ON when LOAD has
been transferred to STANDBY power source.
• Standby run Signal will go ON when the generator is
running and the Inphase Monitor Control circuit
board is operational and controlling the generator.
Generac ® Power Systems, Inc. 17