Operation. Generac G0058721, 14 kW G0058721

Operation

3.1 FUNCTIONAL TESTS AND

ADjUSTmENTS

Following transfer switch installation and interconnection, inspect the entire installation carefully. A competent, qualified electrician should inspect it. The installation should comply strictly with all applicable codes, standards, and regulations.

When absolutely certain the installation is proper and correct, complete a functional test of the system.

‹ perform functional tests in the exact order presented in this manual, or damage could be done to the switch.

IMPORTANT: Before proceeding with functional tests, read and make sure all instructions and information in this section are understood. Also read the information and instructions of labels and decals affixed to the switch. Note any options or accessories that might be installed and review their operation.

3.2 mANUAL OpERATION

‹ Do NOT manually transfer under load.

Disconnect transfer switch from all power sources by approved means, such as the main circuit breaker(s).

A manual HANDLE is shipped with the transfer switch. Manual operation must be checked BEFORE the transfer switch is operated electrically. To check manual operation, proceed as follows:

1. Turn the generator’s AUTO/OFF/MANUAL switch to OFF.

2. Turn OFF both UTILITy (service disconnect circuit breaker) and GENERATOR (generator main line circuit breaker) power supplies to the transfer switch.

3. Note position of transfer mechanism main contacts by observing the moveable contact carrier arm. This can be viewed through the long narrow slot in the inside cover of the

ATS. The top of the moveable contact carrier arm is yellow to be easily identified.

• Manual operation handle in the UP position - LOAD terminals

(T1, T2) are connected to UTILITy terminals (N1, N2).

• Manual operation handle in the DOWN position - LOAD terminals (T1, T2) are connected to EMERGENCy terminals (E1,

E2).

‹ Do not use excessive force when operating the transfer switch manually or damage could be done to the manual handle.

3.2.1 cLose to UtiLitY soUrce side

Before proceeding, verify the position of the switch by observing the position of manual operation handle in Figure 3.1. If the handle is UP, the contacts are closed in the NORMAL (UTILITy) position, no further action is required. If the handle is DOWN, proceed with

Step 1.

Step 1: With the handle inserted into the moveable contact carrier arm, move handle UP. Be sure to hold on to the handle as it will move quickly after the center of travel.

Step 2: Remove manual operating handle from moveable contact carrier arm. Return handle to storage bracket.

3.2.2 cLose to Generator soUrce side

Before proceeding, verify the position of the switch by observing the position of the manual operation handle in Figure 3.1. If the handle is DOWN, the contacts are closed in the GENERATOR

(STANDBy) position. No further action is required. If the handle is

UP, proceed with Step 1.

Step 1: With the handle inserted into the moveable contact carrier arm, move the handle DOWN. Be sure to hold on to the handle as it will move quickly after the center of travel.

Step 2: Remove manual operating handle from moveable contact carrier arm. Return handle to storage bracket.

3.2.3 retUrn to UtiLitY soUrce side

Step 1: Manually actuate switch to return manual operating handle to the UP position.

Step 2: Remove manual operating handle from moveable contact carrier arm. Return handle to storage bracket.

3.3 VOLTAGE CHECkS

1. Turn ON the UTILITy power supply to the transfer switch using the UTILITy SERVICE DISCONNECT circuit breaker.

+ pROCEED wITH CAUTION. THE TRANSFER

SwITCH IS NOw ELECTRICALLY HOT.

CONTACT wITH LIVE TERmINALS RESULTS

IN EXTREmELY HAZARDOUS AND pOSSIbLY

FATAL ELECTRICAL SHOCk.

2. With an accurate AC voltmeter, check for correct voltage.

Measure across ATS terminal lugs N1 and N2. Also check N1 to NEUTRAL and N2 to NEUTRAL.

3. When certain that UTILITy supply voltage is correct and compatible with transfer switch ratings, turn OFF the UTILITy supply to the transfer switch.

4. On the generator panel, set the AUTO/OFF/ MANUAL switch to

MANUAL position. The generator should crank and start.

5. Let the generator stabilize and warm up at no-load for at least five minutes.

6. Set the generator's main circuit breaker (CB1) to its ON or

CLOSED position.

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figure 3.1 — actuating transfer switch

Attach handle to actuating shaft.

NOTE: Return handle to storage position in enclosure when finished with manual transfer.

Operation

Move handle

UP for the

NORMAL

(UTILITY) position.

Move handle

DOWN for the

EMERGENCY

(STANDBY) position.

+ pROCEED wITH CAUTION. GENERATOR

OUTpUT VOLTAGE IS NOw bEING DELIVERED

TO TRANSFER SwITCH TERmINALS.

CONTACT wITH LIVE TERmINALS RESULTS

IN EXTREmELY DANGEROUS AND pOSSIbLY

FATAL ELECTRICAL SHOCk.

7. With an accurate AC voltmeter and frequency meter, check the no-load, voltage and frequency.

Measure across ATS terminal lugs E1 to E2. Also check E1 to

NEUTRAL and E2 to NEUTRAL.

a. Frequency ...........................................60-62 Hertz

b. Terminals E1 to E2..............................240-246 VAC

c. Terminals E1 to NEUTRAL ...................120-123 VAC

d. Terminals E2 to NEUTRAL ...................120-123 VAC

8. Set the generator’s main circuit breaker (CB1) to its OFF or

OPEN position.

9. Set the AUTO/OFF/MANUAL switch to the OFF position to shut down the generator.

NOTE: do NOT proceed until generator AC output voltage and frequency are correct and within stated limits. If the no-load voltage is correct but no-load frequency is incorrect, the engine governed speed may require adjustment. If no-load frequency is correct but voltage is not, the voltage regulator may require adjustment.

Operation

3.4 GENERATOR TESTS UNDER

LOAD

1. Set the generator's main circuit breaker to its OFF or OPEN position.

2. Set the UTILITy SERVICE DISCONNECT circuit breaker to the

OFF position.

3. Manually actuate the transfer switch main contacts to their GENERATOR (STANDBy) position. Refer to "Manual

Operation".

4. To start the generator, set the AUTO/OFF/ MANUAL switch to

MANUAL. When engine starts, let it stabilize for a few minutes.

5. Turn the generator's main circuit breaker to its ON or CLOSED position. The generator now powers all LOAD circuits. Check generator operation under load as follows:

• Turn ON electrical loads to the full rated wattage/amperage capacity of the generator. DO NOT OVERLOAD.

• With maximum rated load applied, check voltage and frequency across transfer switch terminals E1 and E2. Voltage should be greater than 230VAC and frequency should be greater than 59 Hertz.

• Let the generator run under rated load for at least 30 minutes.

With unit running, listen for unusual noises, vibration, overheating, etc., that might indicate a problem.

6. When checkout under load is complete, turn the generator's main circuit breaker to its OFF or OPEN position.

7. Let the generator run at no-load for several minutes. Then, shut down by setting the AUTO/OFF/MANUAL switch to its

OFF position.

8. Move the transfer switch's main contacts back to their UTIL-

ITy position. For example, LOAD connected to UTILITy power supply. Refer to "Manual Operation". Handle and operating lever of transfer switch should be in the UP position.

9. Turn on the utility power supply to transfer switch, using the

UTILITy SERVICE DISCONNECT circuit breaker. The utility power source now powers the loads.

10. Set the generator's AUTO/OFF/MANUAL switch to its AUTO position.

3.5 TESTING LOAD SHED mODULE

(LSm)

A Test pushbutton is provided on the bottom of the LSM to test the operation of the tested functions. The Test button will work when the ATS is in the Utility or the Generator position.

1. Turn the Utility supply on to the ATS.

2. Press the TEST pushbutton on the LSM.

3. Verify that all of the connected loads to be “shed” become disabled. The method of verification will depend on the type of load.

4. After 5 minutes verify the priority 1 loads are enabled. Status

LED L1 and Air 1 is ON.

5. After another 30 seconds, verify the priority 2 loads are enabled. Status LED L2 and Air 2 is ON.

6. After another 30 seconds, verify the priority 3 loads are enabled. Status LED L3 is ON.

7. After another 30 seconds, verify the priority 4 loads are enabled. Status LED L4 is ON.

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