Module 7 Meter Regulators

Question 1

For domestic situations what working pressure at does the regulator operate at?

Answer 1

21mbar +/- 2mbar

Question 2

Who can adjust the working pressure of a regulator?

Answer 2

a) ESP
b) Gas safe engineer with approval of ESP

Question 3

How do you measure standing pressure?

Answer 3

1) Attached u-gauge to test nipple
2) Ensure all appliances are off
3) Turn on ECV – slowly

Question 4

Why do you turn an ECV on slowly?

Answer 4

Turn it on quickly and there is a risk that it will lock the regulator out! Should lock out >23mbar but occasionally at 21mbar

Question 5

How do you measure working pressure at the meter?

Answer 5

1) Attached u-gauge to test nipple
2) Turn on ECV – slowly
3) Turn on appliance

Question 6

When measuring working pressure what appliances do you turn on?

Answer 6

One of the following:

1) Boiler – main burner on
2) Space Heater – gas rate
3) Cooker – three largest burners
4) Other appliances – full gas rate

Question 7

What is the difference between medium and low pressure (mbar)

Answer 7

Low pressure: up to 75mbar
Medium pressure: >75mb and <2 bar

Question 8

Who can replace or repair a regulator?

Answer 8

ESP