NSS Maintenance and Repair Techniques

Question 1

How often should Navien units be descaled?

Accepted Answer

Annually

Answer

Monthly

Answer

Every 3 years

Answer

Never needed

Question 2

What is used to flush the system?

Accepted Answer

Pump and descaling solution

Answer

Compressed air

Answer

Cold water

Answer

Bleach and vinegar

Question 3

What part must be inspected for blockage?

Accepted Answer

Inlet water filter

Answer

Exhaust pipe

Answer

Circuit board

Answer

Drain valve

Question 4

Why is heat exchanger inspection important?

Accepted Answer

Check for corrosion and scaling

Answer

Measure fan speed

Answer

Change gas line

Answer

Measure humidity

Question 5

Which part is replaced when worn gaskets are found?

Accepted Answer

Gaskets

Answer

Fuses

Answer

Thermostats

Answer

Burners

Question 6

What safety check should be done before repairs?

Accepted Answer

Turn off power supply

Answer

Release pressure

Answer

Check screen

Answer

Close exhaust

Question 7

What helps confirm the system is leak-free after repair?

Accepted Answer

Leak test

Answer

Sound check

Answer

Light inspection

Answer

Voltage reading

Question 8

What is a key tool for burner cleaning?

Accepted Answer

Soft brush

Answer

Wire cutter

Answer

Torch

Answer

Lubricant

Question 9

How should you restart the unit after maintenance?

Accepted Answer

Follow power-on and test sequence

Answer

Wait 1 hour

Answer

Drain again

Answer

Adjust thermostat