Emerson 381333234 E Adjustments, How to Change a Setting, Cover Thumb Latch Hook on left side

ADJUSTMENTS (continued)

NOTICE

Do not make any setting changes while the controller is energized.

How to Change a Setting

1. Prevent the transfer switching device from operat-

ing by disconnecting one source first, then the

other, as follows:

a. If the transfer switching device is in the Normal

position, open the emergency source circuit

breaker. Turn the engine starting control to off.

Then open the normal source circuit breaker.

b. If the transfer switching device is in the

Emergency position, open the normal source

circuit breaker. Turn engine starting control to

cover	thumb
	latch

hook on left side

Figure 4-1. Controller cover latch.

	test or run. Then open the emergency source
	circuit breaker.
2.	Disconnect both harness plugs from controller by
	squeezing the latches. Do not pull on the wires.
3.	Remove cover from the controller by releasing latch
	on right side with your thumb. See Figure 4-1.
4.	Locate the appropriate adjustment potentiometer or
	DIP switch for the setting that you want to change.
	Refer to Table 4-1 and Table 4–2 on page 4-1 and
	Figure 4-2, Figure 4–3, Figure 4–4 on page 4–2.
5.	Use a small screwdriver to turn the potentiometer
	clockwise to increase the time delay or counter-
	clockwise to decrease it. See Figure 4-3.

harness plugs

S3 DIP switch

S1 DIP switch

S2 DIP switch

9 volt alkaline battery

J5 battery on/off jumper

P1 retransfer to normal time delay

P2 transfer to emergency time delay

6.	Use a ball-point pen (or similar pointed tool) to
	slide the switch actuators left or right so they match
	the illustration next to the setting (left = off, right =
	on). Recheck the setting. See Figure 4-4.
7.	Install the cover on the controller by hooking it on
	the left side and latching the right side.
8.	Reconnect both harness plugs to the controller by
	aligning and pressing straight in until latches click.

Close the automatic transfer switching equipment enclosure door and tighten the screws before restoring power.

9.Close the enclosure door, then restore both sources:

a.If the transfer switching device is in the Normal position first close the normal source circuit breaker, then close the emergency source cir- cuit breaker.

b.If the transfer switching device is in the Emergency position, close the normal source circuit breaker. The load will be automatically retransferred to the normal source. Then close the emergency source circuit breaker.

10. Turn the engine starting control to automatic.

Figure 4-2. Location of potentiometers, DIP switches, battery, and battery jumper.

clockwise to increase

P1 or P2 potentiometer

counterclockwise to decrease

Figure 4-3. Changing time delay potentiometers.

DIP

switches

SW1

SW2

SW3 actuator

(8 on each DIP switch)

off on

Figure 4-4. Setting DIP switch actuators.

4--2