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SECTION 5 CONTROL FEATURES – ENGINE EXERCISERS
5 --- 1
These timers periodic al l y exercise the emerg enc y engine-g en erator plant. They can be set to exer c ise with or without
load transfer, or t hey can be com pl etel y disabl ed. The eng ine-gen erator should be exercised under load once a week for
a minimum time period of 20 minutes, or follow the rec omm endations of the engine-generator s et manufacturer. Refer
to pa ge 4–2 f or location o f DIP sw itches, b attery (provided), and jum per block in the controller.
BUILT–IN ENGINE EXERCISER
The engine exerciser included in ASCO Series 300
Automatic Transfer Switches provides a once a week
20–minute exercise period. It occurs immediately
when
the Set E ngine Exerciser push button is pressed (and
held
for at least 5 seconds), and then at the same time
weekly thereafter. A 9 volt alkaline battery (Duracell
MN1604, Everready 522, or Panasonic 6AM6) is
furnished and installed in the controller to maintain the
setting. The battery jumper block must be shifted to
the
ON position
. See Figure 4–2 on page 4–2.
Fill in day and time set. Week Day ______ Time _______.
DIP Switch Settings
FUNCTION
S1 DIP
SWITCH
S2 DIP
SWITCH
Std. Timer
Enabled
Actuator
7on
7
Actuator
5on
5
Std. Timer
Disabled
Actuator
7off
7
Actuator
5on
5
Exercise
without
Load
Actuator
8off
8
Exercise
with Load
Actuator
8on
8
Shaded DIP switches are standard factory settings.
status light
If Exerciser with Load is set,
transfers load to Emergency.
If Exercise with Load is set, retransfers load to
Normal, then stops generator after min. cooldown.
Press to cancel an active exercise
period (stops generator).
Press and ho ld for 5 sec
. or until status l ight
blinks rapidly to set exercise period immediately
and every week hereafter (generator starts).
Figure 5-1. Operator panel pushbuttons and light.
Select below either E xercise without Load or E x ercise w ith L oad according to the setting of DIP switch S1, actuator 8. The
load transfers from t he Normal sourc e to Em ergenc y s ourc e (generator) and back again i f Exercise with L oad is selec t ed .
Exercise without Load, DIP Switch S1, Actuator 8 off
8
How to Set Built–In Timer
Step Function Explanation
Push Button Status Light
1
Set Engine
Exer ci se r
hol d
5sec.
blinks rapidly
OPOPOP
set exercise period
Exercise the generator now and
every week at this time hereafter.
2 release
blinks slowly
OPPOPP
exercise period now active Generator starts and runs.
3
press Bypass
Time Delay
O stays on cancel active exercise period Generator s tops.
4 — O stays on generator off Exerciser e nabl ed; r epeats every 7 days.
Exercise with Load, DIP Switch S1, Actuator 8 on
8
How to Set Built–In Timer
Step Function Explanation
Push Button Status Light
1
Set Engine
Exer ci se r
hold
5sec.
blinks rapidly
OPOPOP
set exercise period
Exercise the generator now and
every week at this time hereafter.
2 release
blinks slowly
OPPOPP
exercise period now active
Generator starts and runs;
the load transfers to Emergency.
3
press Bypass
Time Delay
blinks slowly
OPPOPP
cancel active exercise period
The load retransfers to Normal; then
generator runs for 5 minute cooldown
( light blinks slowly during cooldown ).
4 — O stays on generator off Exerciser e nabl ed; r epeats every 7 days.
NOTE:EverytimeSET E NGINE EXERCISER push button is pressed (held 5 seconds) the exercise period is changed.