Emerson 400A Control Features Engine Exercisers, BUILT-IN Engine Exerciser, DIP Switch Settings

SECTION 5 CONTROL FEATURES – ENGINE EXERCISERS

These timers periodically exercise the emergency engine-generator plant. They can be set to exercise with or without load transfer, or they can be completely disabled. The engine-generator should be exercised under load once a week for a minimum time period of 20 minutes, or follow the recommendations of the engine-generator set manufacturer. Refer to page 4–2 for location of DIP switches, battery (provided), and jumper 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 Engine 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			S2 DIP
	SWITCH			SWITCH
Std. Timer	Actuator		7	Actuator
					5
Enabled	7 on			5 on
Std. Timer	Actuator			Actuator
		7			5
Disabled	7 off			5 on
Exercise	Actuator
without		8
	8 off
Load
Exercise	Actuator		8
with Load	8 on

Shaded DIP switches are standard factory settings.

Press to cancel an active exercise	status light
	Press and hold for 5 sec. or until status light
period (stops generator).
	blinks rapidly to set exercise period immediately
If Exercise with Load is set, retransfers load to	and every week hereafter (generator starts).
		If Exerciser with Load is set,
Normal, then stops generator after min. cooldown.
Figure 5-1. Operator panel pushbuttons and light.		transfers load to Emergency.

Select below either Exercise without Load or Exercise with Load according to the setting of DIP switch S1, actuator 8. The load transfers from the Normal source to Emergency source (generator) and back again if Exercise with Load is selected.

Exercise without Load, DIP Switch S1, Actuator 8 off

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How to Set Built–In Timer

Step			Function	Explanation
	Push Button	Status Light
	Set Engine	blinks rapidly		Exercise the generator now and
1	Exerciser		set exercise period
		OPOPOP		every week at this time hereafter.
	hold 5 sec.
2	release	blinks slowly	exercise period now active	Generator starts and runs.
		OPPOPP
3	press Bypass	O stays on	cancel active exercise period	Generator stops.
	Time Delay
4	—	O stays on	generator off	Exerciser enabled; repeats 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
	Set Engine	blinks rapidly		Exercise the generator now and
1	Exerciser		set exercise period
		OPOPOP		every week at this time hereafter.
	hold 5 sec.
2	release	blinks slowly	exercise period now active	Generator starts and runs;
		OPPOPP		the load transfers to Emergency.
	press Bypass	blinks slowly		The load retransfers to Normal; then
3			cancel active exercise period	generator runs for 5 minute cooldown
	Time Delay	OPPOPP
				( light blinks slowly during cooldown ).
4	—	O stays on	generator off	Exerciser enabled; repeats every 7 days.

NOTE: Every time SET ENGINE EXERCISER push button is pressed (held 5 seconds) the exercise period is changed.

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