Emerson 300 Adjustments, How to Change a Setting, Cover Thumb Latch Hook on left side, Switches

Page 14

ADJUSTMENTS (continued)

NOTICE

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

How to Change a Setting

1.Prevent the transfer switch from operating by discon- necting one source first, then the other, as follows:

a.If the transfer switch 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 switch is in the Emergency position, open the normal source circuit breaker. Turn engine starting control to 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.

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.

cover

thumb

 

latch

hook on left side

Figure 4-1. Controller cover latch.

 

9 volt

 

alkaline

 

battery

 

J5 battery

harness

on/off

jumper

plugs

 

 

P1

 

retransfer

 

to normal

 

time delay

S3 DIP

P2

transfer to

switch

emergency

S1 DIP

time delay

 

switch

 

 

S2 DIP

 

switch

Figure 4-2. Location of potentiometers.

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 transfer switch enclosure door.

clockwise to increase

P1 or P2 potentiometer

counterclockwise to decrease

Figure 4-3. Changing time delay potentiometers.

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

a.If the transfer switch is in the Normal position first close the normal source circuit breaker, then close the emergency source circuit breaker.

b.If the transfer switch 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.

4---2

DIP

switches

SW1

SW2

SW3 actuator

(8 on each DIP switch)

off on

Figure 4-4. Setting DIP switch actuators.

Image 14
Contents Operator’s Manual Rating LabelPage Nameplate Catalog Number Identification EnclosurePage Installation SectionAuxiliary Circuits Left side Transfer switch Table A. Engine start ConnectionsEngine Starting Contacts Connections to ControllerInstallation Functional Test Manual Operation TestInstallation Voltage ChecksElectrical Operation Retransfer to Normal Sequence of OperationTransfer To Emergency Disconnecting the Controller Testing & ServicePreventive Maintenance Manual Load Transfer Testing & ServiceTROUBLE-SHOOTING Sensor Adjustments AdjustmentsTime Delay Adjustment Time Delay SettingsSwitches AdjustmentsHow to Change a Setting SW3 actuator On each DIP switch Off onHow to Set Built-In Timer Control Features Engine ExercisersDIP Switch Settings BUILT-IN Engine ExerciserControl Features Programmable Engine Exerciser ModuleFill in your settings for future reference Daylight Savings Time Adjust DisplayFast / Slow Adjust Display Run Time DisplayLoad Disconnect Feature Remote Control FeaturesInphase Monitor For Motor Load Transfer Available Kits Control Features Optional Strip Heater AccessoryStrip Heater Accessory ControlsIndex
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300 specifications

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