Generac Power Systems GTS "W", Owner'S Manual

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12 Generac ® Power Systems, Inc.
3.14 SEQUENCE OF OPERATION SETTINGS
Units with Inphase Monitor Control Circuit Board
Section 3 — Operation
Generac GTS “W” Type Transfer Switch
ADJUST FACTORY
SEQUENCE ACTION TIMER/SENSOR RANGE SETTING
—* UTILITY volts available - no action Voltage Dropout Sensor 75 - 95% 90%
A* UTILITY voltage drops out Voltage Dropout Sensor 75 - 95% 90%
B Line Interrupt Delay Timer Starts Line Interrupt Delay Timer 0.1 - 10 seconds 5 seconds
C Line Interrupt Delay Timer Stops Line Interrupt Delay Timer .01 - 10 seconds 5 seconds
— Engine cranks and starts
D Engine Minimum Run Timer starts Engine Minimum Run Timer 5 to 30 minutes 20 minutes
E** Engine Warmup Timer Starts Engine Warmup Timer 5 sec. - 3 min. 1 minute
F STANDBY ON lamp ON
G** Engine Warmup Timer stops Engine Warmup Timer 5 sec. - 3 min. 1 minute
H Is STANDBY voltage good? Standby Voltage Sensor 85 - 95% 90%
J Is STANDBY frequency good? Standby Frequency Sensor 80 - 90% 90%
K Time Delay at NEUTRAL Time Delay Neutral Timer 0.1 - 10 seconds 5 seconds
L Inphase Transfer Inphase Transfer Select None
— Transfer to STANDBY
M TRANSFER TO STANDBY lamp ON
— STANDBY source powers LOAD
N UTILITY voltage restored Voltage Pickup Sensor 85 - 95% 90%
O Return to UTILITY Timer ON Return to Utility Timer 1 - 30 minutes 5 minutes
P Timed Delay at NEUTRAL Time Delay Neutral Timer 0.1 - 10 seconds 5 seconds
R Inphase Transfer Inphase Transfer Select none 0.1 - 30 seconds
S Signal Before Transfer LED lights Signal Before Transfer Timer 1 - 30 seconds 10 seconds
— Re-transfer to UTILITY source
T*** Engine Cooldown Timer starts Engine Cooldown Timer 1 - 30 minutes 10 minutes
U*** Engine Cooldown Timer stops Engine Cooldown Timer 1 - 30 minutes 10 minutes
— Engine shuts down
— UTILITY volts available - no action
* 75 - 95% of the Voltage Pickup Sensor setting
** Engine Warmup Timer can be bypassed. See SENSOR AND TIMER ADJUSTMENTS
*** Following re-transfer to UTILITY source, engine shutdown will not occur until both Engine Minimum run and
Engine Cooldown timers have timed out.
3.13.7 SEQUENCE 7 - ENGINE COOL DOWN
TIMER
• After the switch re-transfers loads back to UTILITY,
this timer starts. When the interval has “timed out”,
the automatic start circuit (Wires 178/183) is opened,
and the engine shuts down.
• Timer permits engine to run at no-load for a fixed
time, so the engine internal temperature can stabilize
before shutting down.
• Set the timer for 1-30 minutes; factory setting is
about 10 minutes.
NOTE:
Actual time between re-transfer back to UTILITY and
engine shutdown is whichever is longer of the
Engine Cool Down timer setting or any time remain-
ing on Engine Minimum run timer.
After the switch automatically re-transferred loads back
to the UTILITY power source and generator has shut
down, the system is “armed” for Sequence 1 again.
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