GMJ 9189 Phase 3 -Hot water - work sheet 4

Name the four documents that should be followed when commissioning a hot water system.

• The Water Supply (Water Fittings) Regulations

• BSEN806

• Building Regulations Part J

• Building Regulations Part G

• Manufacturer’s instructions

What could be a problem when initially filling an open vented system?

• Pump leaking

• Airlocks

• Constantly running cold water

• Pump not started

Before initially filling an unvented system, what item should be charged?

• shock arrestor

• Cylinder

• Customer

• Expansion vessel

Which of the following British Standards outlines the soundness test for pipework?

• BS12056

• BSEN5443

• BSEN806

• BS1212

Describe why flushing a system out is important to the commissioning process.

• It removes any debris and contaminants from the system

• It checks for leaks

• It disinfects the pipe work and kills bacteria

• It protects against the risk of stagnation.

What tools are used to gain the following readings - Temperatures?

• Flow cup/Weir gauge

• Thermometer

• Pressure gauge

What tools are used to gain the following readings - Flow Rate?

• Flow cup/Weir gauge

• Thermometer

• Pressure gauge

What tools are used to gain the following readings - Pressure?

• Flow cup/Weir gauge

• Thermometer

• Pressure gauge

List items that should be checked during the visual inspection.

• Open ends, joints, & supports.

• whether the system has been installed correctly (manufacturer’s instructions)

• thermistors, pressure relief valve, temperature relief valve & plate to plate heat exchanger

• expansion vessel charge, cistern, & cylinder

• float operated valves, isolation valves, D1 and D2