Operator's Manual

Introduction and Safety

⚠️ DANGER: DANGER is used in this manual to warn of a hazardous situation which, if not avoided, will result in death or serious injury.

❗ WARNING: WARNING is used in this manual to warn of a hazardous situation which, if not avoided, could result in death or serious injury.

? CAUTION: CAUTION is used in this manual to warn of a hazardous situation which, if not avoided, could result in minor or moderate injury.

Refer to the outline and wiring drawings provided with your ASCO Series 300 ATS for all installation details.

Rating Label

Each automatic transfer switch contains a rating label to define the loads and fault circuit withstand / closing ratings. Refer to the label on the transfer switch for specific values.

❗ Do not exceed the values on the rating label. Exceeding the rating can cause personal injury or serious equipment damage.

An experienced licensed electrician must install the Automatic Transfer Switch (ATS).

Available sizes include 1000, 1200, 1600 A.

Table of Contents

Product Identification

Nameplate

The Transfer Switch nameplate includes data for each specific ASCO Series 300 ATS. Use the ATS only within the limits shown on this nameplate.

Catalog Number Identification

A typical Catalog Number is shown below with its elements explained. The example is for a G-design Series 300 ATS with switched neutral, 3 pole, 2000 ampere, 480 V, in a Type 1 enclosure:

G 300

Section 1: INSTALLATION

Series 300 Automatic Transfer Switches are factory wired and tested. Installation requires skid removal then securing the enclosure to the supporting foundation.

Remove the Shipping Skid

Open the front door and remove the four lag screws (two in front, two in rear) securing the enclosure to the wood skid.

Supporting Foundation

The supporting foundation for the enclosure must be level and straight. Refer to the applicable enclosure outline drawing included with the Series 300 for all mounting details including door opening space.

If bottom cable entry is used, the foundation must be prepared so that the conduit stubs are located correctly. Refer to the enclosure outline drawing for specified area and location. Provide cable bending space and clearance to live metal parts. When a concrete floor is poured, use interlocking conduit spacer caps or a wood or metal template to maintain proper conduit alignment.

Mounting

Refer to the applicable enclosure outline drawing furnished with this switch and mount the Series 300 according to details and instructions shown on diagram.

Auxiliary Cable Box for 1000–2000 ampere

An auxiliary cable box is required if the power cables do not enter the enclosure directly adjacent to the terminal lugs (for example, if all power cables enter the top or bottom). Order ASCO part no. 609027 if needed.

Do not route the power cables along the sides of the Transfer Switch.

Line Connections

Refer to the Wiring Diagram provided with your Series 300 ATS. All wiring must be made in accordance with the National Electrical Code and local codes.

It is unnecessary to remove pole covers from the transfer switch. If you do remove them, reinstall them carefully.

⚠️ DANGER: De-energize the conductors before making any line or auxiliary circuitry connections. Be sure that Normal and Emergency line connections are in proper phase rotation. Place engine generator starting control in the OFF position. Make sure engine generator is not in operation.

INSTALLATION (continued)

Testing Power Conductors

Do not connect the power conductors to the Series 300 transfer switch until they are tested. Installing power cables in conduit, cable troughs and ceiling-suspended hangers often requires considerable force. The pulling of cables can damage insulation and stretch or break the conductor's strands. For this reason, after the cables are pulled into position, and before they are connected, they should be tested to verify that they are not defective or have been damaged during installation.

Protect the automatic transfer switch from construction grit and metal chips to prevent malfunction or shortened life of the ATS.

Connecting Power Conductors

After the power cables have been tested, connect them to the appropriate terminal lugs on the transfer switch as shown on the wiring diagram provided with this Series 300. Make sure the lugs provided are suitable for use with the cables being installed. Standard terminal lugs are solderless screw type and will accept the wire sizes listed on the drawings provided with the Series 300. Be careful when stripping insulation from the cables; avoid nicking or ringing the conductor. Remove surface oxides from cables by cleaning with a wire brush. When aluminum cable is used, apply joint compound to conductors. Tighten cable lugs to the torque specified on rating label.

Controller Ground

A grounding wire must be connected to the controller's lower left mounting stud. Because the controller is mounted on the enclosure door, a conductive strap must be used between the enclosure and the door. This connection provides proper grounding which does not rely upon the door hinges.

Harnesses

The transfer switch is connected to the left side of the controller by a plug-in harness (two plugs).

INSTALLATION (continued)

Engine Starting Contacts

Customer connections for engine control contact and TS auxiliary contacts connections are located on terminal block TB which is mounted on the front of the transfer switch. Refer to wiring diagram provided with the Series 300 ATS and connect the engine start wires to the appropriate terminals. See Figure 1–1 and Table A.

Table A. Engine start connections.

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate terminals on transfer switch terminal block TB as shown on the wiring diagram provided with this Series 300 Automatic Transfer Switch. Make the necessary auxiliary connections by referring to Section 5, Control Features.

Connections to Controller for other Control Features (located on bottom of Controller):

This area details connections for Load Disconnect Feature, Programmable Engine Exerciser, and Remote Control Features. Each control contact must be suitable for a 5 V DC low energy circuit. Connections are made to terminals 1-16 on the controller's lower terminal block. Terminal blocks are labeled for specific functions like LOAD DISCONNECT CONTACTS, OPTIONAL ENGINE EXERCISER, MOMENTARY TEST SWITCH, MAINTAINED TRANSFER TO EMERGENCY, INHIBIT TRANSFER TO EMERGENCY, BYPASS TRANSFER TIME DELAY, OUTPUT CONTACTS (120VAC 5A), and INPUT CONTACTS (5VDC 5mA). Some terminals are marked "for factory use only".

INSTALLATION (continued)

Functional Test

The Functional Test consists of three checks: manual operation, voltage checks, and electrical operation.

Do these checks in the order presented to avoid damaging the automatic transfer switch.

Read all instructions on the Wiring Diagram and labels affixed to the automatic transfer switch. Note the control features that are provided and review their operation before proceeding.

1 - Manual Operation Test

A detachable maintenance handle is provided on the frame of the Transfer Switch for maintenance purposes only. Manual operation of the transfer switch should be checked before it is energized (operated electrically).

❗ WARNING: Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.

Table B. Maintenance handle positions.

1. After deenergizing both power sources, open the enclosure door. Locate and remove the maintenance handle and hub stored on the transfer switch frame. Then install the hub onto the center operator shaft and insert the handle firmly into the hole in the side of the hub (spring fully compressed). See Figure 1–3 and 1–4 and Table B.
2. If the transfer switch is closed on Normal (window shows CLOSED), grasp handle firmly and turn it counterclockwise ?. The transfer switch should operate smoothly without binding. If it does not, check for shipping damage or construction debris.
3. Turn the handle clockwise ➡️ to return the transfer switch to the Normal position. Observe that the window indicators (left side) show the top shaft OPEN and the bottom shaft CLOSED. Note: If Normal and Emergency connections are reversed, this operation is also reversed.
4. Remove the maintenance handle and hub and store it on the frame in the place provided.

Verify that the maintenance handle has been removed before proceeding!

Now continue to 2 – Voltage Checks on next page.

INSTALLATION (continued)

2 – Voltage Checks

First check nameplate on transfer switch; rated voltage must be the same as normal and emergency line voltages.

⚠️ DANGER: Use extreme caution when using a meter to measure voltages in the following steps. Do not touch power terminals; shock, burns, or death could result!

Perform steps 1 through 6 at the right. Observe the status lights. See Figure 1–5.

• ⚫ Black circle means light is on.
• ⚪ White circle means light is off.

* If necessary, adjust voltage regulator on the generator according to the manufacturer's recommendations. The Automatic Transfer Switch will respond only to the rated voltage specified on the Transfer Switch nameplate.

Also see page 4–1 for the HI-LOW voltage adjust setting in the controller. The LOW setting shifts all voltage settings down 4.2%; for example, 240 V to 230 V.

Now continue to 3 – Electrical Operation on next page.

INSTALLATION (continued)

3 – Electrical Operation

This procedure will check the electrical operation of the Automatic Transfer Switch.

❗ WARNING: Close the transfer switch enclosure door and tighten the screws before you test electrical operation.

Transfer Test

Both normal and emergency sources must be available and the emergency source generator (if used) must be capable of being started in this procedure.

Perform steps 1 through 8 at the right. Observe the status lights. See Figure 1–6.

• ⚫ Black circle means light is on.
• ⚪ White circle means light is off.

NOTE: If Motor Load Transfer feature is activated, then transfer may not occur immediately after the respective time delays. Transfer will only occur when the phase relationship between sources is correct.

This completes the Functional Test of the ASCO Series 300 Automatic Transfer Switch. Leave the engine-generator starting control in the automatic position.

SECTION 2: SEQUENCE OF OPERATION

Transfer To Emergency

The sequence for load transfer to emergency source begins automatically when normal source voltage falls below the preset dropout point or when Transfer Test button is pressed. An under voltage condition on any phase of the normal source is detected by the sensor.

When the normal source voltage fails or the Transfer Test button is pressed, the SE relay de-energizes and relay NR begins its timing cycle (1 or 3 seconds, momentary normal source outage delay). The NR relay is provided with a time delay on dropout to override momentary outages and prevent nuisance starting of the engine-driven generator. If the normal source voltage returns above the sensor dropout setting before the time delay expires, the NR relay timing cycle is reset to zero and relay SE energizes.

If the normal source voltage does not return above the sensor dropout setting before the time delay expires, the NR relay de-energizes and signals the engine-driven generator to start. At the same time, a voltage and frequency sensor begins monitoring the emergency source. The sensor will accept the emergency source only when both voltage and frequency reach preset pickup points. Usually about ten seconds elapse from dropout of the NR relay to acceptance by the sensor. This time span occurs because the engine-driven generator must crank, start, and run up to nominal pickup points. For this reason, if the Transfer Test button is pressed it must be held for 15 seconds. If the emergency source is available immediately, the sensor may accept it as soon as NR relay drops out.

When the emergency source is accepted by the sensor, relay ER begins its timing cycle (transfer to emergency delay). ER relay is provided with an adjustable (0 to 5 minutes) time delay on pickup to delay transfer of the load to the emergency source. For immediate transfer press Bypass Time Delay button.

ER relay energizes, the TS coil is energized, the transfer switch operates, and all switch contacts (mains, controls, auxiliaries) reverse position. The transfer switch is now supplying the load from the emergency source.

The transfer switch will remain in the Emergency position until the normal source is restored. If the Transfer Test button is used, the transfer switch will remain on emergency until the retransfer to normal delay times out.

Retransfer to Normal

The sequence for load retransfer to the normal source automatically begins when the voltage sensor detects restoration of the normal source. The voltage level must rise above the preset pickup point on all phases before the sensor will accept the normal source.

When the normal source is accepted by the sensor, relay SE begins its timing cycle (adjustable 1 sec. to 30 min., retransfer to normal delay). For immediate retransfer press Bypass Time Delay button. SE relay is provided with a time delay on pickup to prevent immediate load retransfer to the normal source. The delay insures that the normal source has stabilized before reconnection of vital loads. If the normal source voltage falls below the present dropout point before the time delay expires, the timing cycle is reset to zero. If the emergency source fails for more than 4 seconds during the timing cycle, ER relay drops out and the load is immediately retransferred to the normal source, if that source is acceptable.

SE relay energizes and ER relay is dropped out. The TS coil is energized, the transfer switch operates, and all switch contacts (mains, controls, auxiliaries) reverse position. The transfer switch is now supplying the load from the normal source again.

Upon retransfer to the normal source, NR relay begins its timing cycle (unloaded running delay, engine cooldown). NR relay is provided with a 5 min. time delay on pickup to keep the engine running for a cool-down period.

NR relay energizes after the time delay and signals the engine-driven generator to shut down. All circuits are reset for any future normal source failure.

Activation of standard control features shown in Section 5 will alter the sequence of operation and introduce additional time delays during transfer operations.

SECTION 3: TESTING & SERVICE

PREVENTIVE MAINTENANCE

For high reliability and long life for the ATS: Operate the switch at least once a month. Perform this 4-step Electrical Operation Test (test with load transfer).

Transfer Switch Test

1. Press and hold the door-mounted Transfer Test button until the engine starts and runs. This should happen within 15 seconds.
2. The transfer switch will operate to the Emergency position. If the Transfer To Emergency Delay is used, the transfer will occur after a time delay (up to 5 minutes). For immediate transfer press Bypass Time Delay button.
3. The Transfer Switch will operate back to the Normal position after the Retransfer To Normal Delay (up to 30 minutes). For immediate retransfer press Bypass Time Delay button.
4. Unloaded Running (Engine Cooldown) Delay allows engine to run unloaded for 5 minutes.

Checklist for Yearly Inspection

⚠️ DANGER: Hazardous voltage capable of causing shock, burns, or death is used in this switch. Deenergize both Normal & Emergency power sources before performing inspections!

• Clean the enclosure. De-energize all sources, then brush and vacuum away any excessive dust accumulation. Remove moisture with a clean cloth.
• Check the transfer switch contacts. De-energize all sources, then remove the transfer switch barriers and check contact condition. Replace the contacts if they become pitted or worn excessively. Reinstall the barriers carefully.
• Maintain transfer switch lubrication. Under normal operating conditions no further lubricating is required. Renew factory lubrication if the switch is subjected to severe dust or abnormal operating conditions or if TS coil is replaced. Order lubricant kit 75-100.

Check all cable connections & retighten them. Torque to values shown on transfer switch label.

Replacement parts. When ordering parts provide the Serial and Catalog Nos. from the transfer switch nameplate. Contact ASI. In the US call 1-800-800-ASCO (2726)).

DISCONNECTING THE CONTROLLER

The harness disconnect plugs are furnished for repair purposes only and should not have to be unplugged. If the controller must be isolated, follow these steps carefully.

Disconnecting the Plugs

1. Observe the position of the transfer switch.
   1. If the transfer switch is in the Normal position, place standby engine starting control in the off position. Then open the emergency source circuit breaker.
   2. If the transfer switch is in the Emergency position, open the normal source circuit breaker. Place the engine starting control in the test or run position.
2. Separate the quick disconnect plugs by squeezing the latches. Do not pull on the harness wires.
3. Label, remove, and tape the signal wires connected to the engine start terminals on the transfer switch: TB1 and TB3, or TB1 and TB2.

Reconnecting the Plugs

1. Observe the position of the transfer switch.
   1. If the transfer switch is in the Normal position, be sure that the standby engine starting control is still in the off position. The emergency source circuit breaker still should be open.
   2. If the transfer switch is in the Emergency position, normal source circuit breaker still should be open.
2. Reconnect the signal wires connected to the appropriate engine start terminals on the transfer switch. See Section 1, Engine Starting Contacts.
3. The harness plugs and sockets are keyed. Carefully align the plugs with the sockets and press straight in until both latches click.
4. Restore the opposite source as follows:
   1. If the transfer switch is in the Normal position, place the standby engine starting control in the automatic position. Then close the emergency source circuit breaker.
   2. 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 after the Retransfer to Normal Delay. For immediate retransfer, press Bypass Time Delay button. Place the engine starting control in the automatic position.

TESTING & SERVICE (continued)

MANUAL LOAD TRANSFER

This procedure will manually transfer the load if the controller is disconnected.

❗ WARNING: Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.

1. Open normal and emergency source circuit breakers.
2. Use the maintenance handle to manually operate transfer switch to the opposite source. See page 1–3, Manual Operation Test.
3. If the transfer switch is in the Emergency position manually start the engine generator and then close the emergency source circuit breaker.

TROUBLE-SHOOTING

Note the control features that are activated or furnished on the switch and review their operation. Refer to Section 5, Control Features.

❗ Proceed with care! The automatic transfer switch is energized.

Table 3-1. Trouble-Shooting Checks.

Trouble-Shooting the Motor Load Transfer Feature (refer to page 5–4)

⚠️ DANGER: Use extreme caution when using a meter to measure voltages in the following steps. Do not touch power terminals; shock, burns, or death could result!

1. Connect a voltmeter (set for twice system phase-to-phase voltage) between Transfer Switch terminals NA and EA.
2. Manually start generator. Voltmeter needle should sweep back and forth at a regular rate between 0 and about twice system voltage.
3. Press and hold Transfer Test button. The load should transfer to emergency source when meter needle is near 0 volts. If transfer does not occur, Motor Load Transfer feature is not operating.
4. Release the Transfer Test button. The load should retransfer back to the normal source after the Retransfer to Normal Delay, if used. The retransfer should occur when the needle is near 0 volts. If retransfer does not occur after the time delay, the Motor Load Transfer feature is not operating.
5. For immediate retransfer, press the Bypass Time Delay button. Then disconnect the voltmeter.

If the problem is isolated to circuits on the controller or the transfer switch, call your local ASCO Power Technologies sales office, representative, or ASI. In the United States, call 1–800–800–2726. Furnish the Serial No., Bill of Material (BOM) No., and Catalog No. from transfer switch nameplate.

SECTION 4: ADJUSTMENTS

Time Delay Adjustment

Standard time delays are set to customer specifications (if none specified, standard factory settings are used).

To change a setting, follow procedure on page 4-2. Use Table 4-1 as a guide to time delay values and their corresponding adjustment DIP switch or potentiometer.

Table 4-1. Time Delay Settings

Sensor Adjustments

Voltage and frequency sensor pickup and dropout points are set to customer specifications (if none specified, standard factory settings are used). To change a setting, follow procedure on page 4-2. Use Tables 4-2 and 4-3 for settings and corresponding DIP switch actuators.

Any change in these settings may affect the normal operation of the automatic transfer switch. This change could allow the load circuits to remain connected to a low voltage source.

Table 4-2. Voltage and Frequency Settings. ( Shaded DIP switches are standard factory settings).

* If dropout voltage is set to 90%, the pickup voltage must be set to 95%.

Table 4-3. Transformer Voltage Adjust. (Low setting shifts all voltage settings down 4.2%; for example, 240 V to 230 V, or 480 V to 460 V)

ADJUSTMENTS (continued)

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

How to Change a Setting

1. Prevent the transfer switch from operating by disconnecting one source first, then the other, as follows:
   1. 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.
   2. 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 counterclockwise ? 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.
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.

❗ WARNING: Close the transfer switch enclosure door.

9. Close the enclosure door, then restore both sources:
   1. If the transfer switch is in the Normal position first close the normal source circuit breaker, then close the emergency source circuit breaker.
   2. 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.

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

Shaded DIP switches are standard factory settings.

Press to cancel an active exercise period (stops generator). ▶️

If Exercise with Load is set, retransfers load to Normal, then stops generator after min. cooldown.

If Exerciser with Load is set, transfers load to Emergency. ➡️

Exercise without Load, DIP Switch S1, Actuator 8 off

Exercise with Load, DIP Switch S1, Actuator 8 on

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

CONTROL FEATURES (continued)

Optional Accessory 11BG – SOURCE AVAILABILITY SIGNAL & PROGRAMMABLE ENGINE EXERCISER MODULE

Source Availability Signal Contacts

The module provides one Form C contact each for the normal and emergency sources signal the acceptability of the source as sensed by the controller. The signal contacts operate in conjunction with the Source Accepted lights on the operator interface. Field wiring terminals are provided as shown in Figure 5–3 and the wiring diagram.

Contact ratings: 2 amps @ 30 Vdc, 0.5 amp. @ 125 Vac resistive

Programmable Engine Exerciser

The module includes a programmable engine exerciser that provides for weekly or biweekly operation. This optional exercise timer may have to be turned on (enabled) by setting the S1 DIP switch actuator 7 to off, and S2 DIP switch actuator 5 to off. A backup battery in the controller (see page 4–2 and page 5–3) must be turned on to maintain the settings and to allow programming with the normal and emergency power turned off (page 5–1).

The programmable engine exerciser incorporates a 7 day or 14 day time base. Proper controller settings must be made to determine whether or not the test will be done with or without load transfer (S1 DIP switch actuator 8).

See next page for instructions on setting the timer.

DIP Switch Settings in the Controller (see page 4-2)

Shaded DIP switches are standard factory settings.

CONTROL FEATURES (continued)

How to Set Optional Programmable Engine Exerciser (part of Acc. 11BG module)

⚠️ DANGER: Hazardous voltage capable of causing shock, burns, or death is used in this transfer switch. Deenergize both Normal and Emergency power sources before programming the exerciser.

Navigating the Menu

Use the UP and DOWN arrow keys ⬆️⬇️ to move through the displays.

Changing the Parameters

Use the UP and DOWN arrow keys ⬆️⬇️ to move though the displays to the parameter to be changed. Push the ENTER key to start the editing process. The first parameter will flash. Use the UP and DOWN arrow keys ⬆️⬇️ to adjust the parameter to the desired value and press the ENTER key to save the value. The next parameter will now flash. Repeat the process until each parameter is properly configured.

Engine Exerciser Display

The Engine Exerciser Display shows the status of the engine exerciser. When the unit is shipped from the factory the programmable engine exerciser is "Disabled” and must be set to “Enabled” by the customer. When the engine exerciser is running, this display will count down the remaining time until the end of the exercise period.

Start Time Display

The Start Time Display shows the engine exerciser start time. There are four parameters that determine the start time:

• weekly ("Every”) or bi-weekly ("Alt”) operation
• day of week ("Sun” through “Sat”)
• start hour (0 through 23)
• start minutes (0 through 59)

For example, if the user wants the exerciser to run every other Saturday at 3 PM, the proper configuration would be: "Alt Sat @ 15:00"

Fill in your settings for future reference

NOTE: When choosing bi-weekly operation, the exerciser will always run on the week designated "(1)" on the date display.

Run Time Display

The Run Time Display shows the run time for the engine exerciser. The default setting from the factory is 30 min.

Time Display

The Time Display shows the present system time. The format is "hours:minutes:seconds".

NOTE: During total power outages, power to the accessory is maintained by a battery in the Controller (see page 4–2). Be sure that the 9–volt alkaline battery is fresh and enabled (jumper in ON position) so that the time and date settings are not lost.

Date Display

The Date Display shows the present system date. The format is "day of week (week) month/day of month/year".

NOTE: Week is either week 1 or week 2. This is used in conjunction with the bi-weekly timer.

Daylight Savings Time Adjust Display

This display shows whether the automatic daylight saving time adjustment is active. The factory default is “NO”. If enabled, the unit will automatically adjust for daylight saving time at 2 AM on Sunday as follows:

* Part no. on back of circuit board. New DST starts in 2007.

Fast / Slow Adjust Display

This display shows the automatic fast/slow adjustment value. The factory default is 0. This feature can be used to trim a clock that runs fast or slow. For example, if your clock runs 10 seconds slow per week, change the fast/slow adjust value to "+10" and the unit will automatically add 10 seconds to the clock every week.

NOTE: Adjustments are made Sunday morning at 2 AM. If you want your exerciser period to start at 2 AM on Sunday, you cannot use this feature and the adjustment must be set to 0.

Date exerciser was set: ___________________________

CONTROL FEATURES (continued)

INPHASE MONITOR FOR MOTOR LOAD TRANSFER

Inphase monitoring logic controls transfer and retransfer of motor loads, so that inrush currents do not exceed normal starting currents. It avoids nuisance tripping of circuit breakers and mechanical damage to motor couplings.

The Motor Load Transfer feature is built into the controller. DIP switch S1 (actuator 5) activates this feature: right = ON, left = OFF.

Shaded DIP switches are standard factory settings.

If the Motor Load Transfer feature is enabled, it will be activated following the Load Disconnect Feature Delay Before Transfer delay.

LOAD DISCONNECT FEATURE

Connect external circuits to the terminals indicated on the Wiring Diagram provided with the ATS.

The double throw (Form C) contact is rated for 28 VDC or 120 VAC (5 amperes resistive). The contact operates prior to a selectable 0, 3, 10, or 20 second delay before transfer of the Automatic Transfer Switch. The contact resets either immediately following transfer or after the same delay as set for pre-signal before transfer.

Time delay between the load disconnect control signal and initiation of transfer is set on the controller with DIP switch S2 (actuators 6, 7, 8) as shown below:

Delay Before Transfer

Shaded DIP switches are standard factory settings.

Delay After Transfer*

*Enabling the Delay After Transfer will cause the control signal to reset after the same delay as set for the Delay Before Transfer.

REMOTE CONTROL FEATURES

These remote control features require a customer-supplied normally closed contact suitable for a 5 V dc low energy circuit. Refer to the Wiring Diagram provided with the ATS. Activate appropriate DIP switch S2 actuators below.

Remote Test (terminals CP6–7)

Bypass Transfer Time Delay (CP12–13)

Remote Transfer to Emergency (CP8-9)

Inhibit Transfer to Emergency (CP10–11)

CONTROL FEATURES (continued)

OPTIONAL STRIP HEATER (Accessory 44)

Accessory 44 Strip Heater is designed to keep ambient temperatures within the Automatic Transfer Switch enclosure at acceptable levels. This accessory consists of a mounting bracket with strip heater, thermostat, and terminal block. A transformer with fuses is included when the power for the assembly is derived from voltages above 120 V ac. The 120 V ac customer powered assembly does not include a transformer. This optional accessory is available factory installed or in kit form.

Turn the thermostat's dial to required setting as shown.

AVAILABLE KITS

Controls

Strip Heater – Accessory 44

INDEX

Printed in U.S.A.

Copyright --- ASCO Power Technologies, L.P. 2012