Quantech Authorized Contractor Program - Renewal Contractor Skill Assessment

Which of the following digital outputs are not able to be signaled ON in service mode?

Fans

Liquid line solenoid valves

Compressors

None of the options are correct

If a QTC3 chiller is equipped with a low ambient kit, what is the minimum operating temperature?

20F

32F

-20F

If a chiller is equipped with hot gas bypass, when will it turn on?

At start-up

At the final step of unloading

Hot gas bypass is always on

None of the options are correct

What key on the chiller keypad provides the operating conditions of the chiller?

Options

None of the options are correct

Operating data

Program

What key on the chiller keypad displays the 'current status' condition of the chiller?

History

Program

None of the options are correct

What is the switch below the chiller key pad used for?

Unit start/stop

Unit reset

Emergency stop

All of the options are correct

The ????? and ????? Keys are used for changing numerical or text values when programming the micro control center.

UP and DOWN arrows

LEFT and RIGHT arrows

UP, DOWN, LEFT and RIGHT arrows can all be used to change these values

None of the options are correct

It is NOT important to check and verify that the valve packing is tight.

False

True

What is the proper sequence on the chiller keypad to get into Service Mode?

Program-up-down-up-down

Program-up-up-down-down

Status-up-up-down-down

Status-up-down-up-down

Referencing Form QTC3-NM1 (Installation Checklist and Authorized Start-up), the example subcooling should be adjusted to ????? At design conditions.

10F

15F

18F

21F

Referencing Form QTC3-NM1 (Installation Checklist and Authorized Start-up), the example superheat is calculated to be ?????.

10F

12F

21F

On a QTC3 chiller, the scroll compressor can be used to pump the refrigerant system down into a vacuum when servicing the unit.

True

False

All of the following are digital inputs except for ?????.

Load limiting

Flow proving

Control relay closure

Suction pressure

What is the proper way to check the accuracy of the pressure transducer?

Read the chiller display

Compare signal voltage to the formula provided in the IOM

Compare the display pressure to a calibrated gauge

All of the options are correct

Which section in the Quantech IOMs is 'Commissioning'?

Section 6

Section 7

Section 3

Section 9

Referencing Form QTC2-NM1 (Equipment Start-up Checklist), the example subcooling should be adjusted to ????? At design conditions.

15F

21F

10F

What is a potential cause for a MP/HP fault?

Open motor protector

Open high pressure switch

Failed control relay

All of the options are correct

BACnet RS485 networks are wired to ????? On the chiller micro board?

TB1

TB2

TB3

None of the options are correct

Failure to jumper or close contacts between terminals 13 and 51 on the customer terminal block can result in which fault?

MP/HP fault

Sensor failure

Flow fault

No run permissive

What should the oil level be before start-up?

Full

Empty

1/4 - 3/4 full

Exactly 1/2 full

It is extremely important to install a strainer after the brazed plate heat exchanger.

True

False

What is the purpose of the receiver on a QTC3 chiller?

To keep liquid refrigerant from entering the compressor

To supply liquid refrigerant to the compressor

To store liquid refrigerant during unit pump down

To store oil during unit maintenance

What is the purpose of the HISTORY key on the chiller control panel?

To view previous faults

To view data that occurred during a fault

To view the time and day a faul occurred

All of the options are correct

When performing a chiller start-up, what is the first step that needs to be completed?

Turn the chiller ON

Turn the condenser fans ON

Check for dammage and missing parts and document as necessary

Add refrigerant to the system

What type of flow switch is provided with at QTC3 chiller?

Paddle flow switch

Thermal dispersion flow switch

Pressure differential switch

The QTC3 chiller does not require a flow switch

Quantech Authorized Contractor Program - Renewal Contractor Skill Assessment

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