S Plan Plus wiring

What colour wire from a two port zone valve sends power to the boiler and pump?

• Orange

• Brown

• Grey

• Blue

What colour wire from the two port zone valve is permanent live and connected to terminal 1 of the 10 way?

• Grey

• Orange

• Brown

• Yellow/Green

What terminal in the 10 way should all neutral (Blue) wires be connected to?

• 1

• 2

• 3

• 10

What wires are terminated in terminal 3 of the 10 way?

• Earth

• Live

• Neutral

• Pump/Boiler switch live

When using different colour cables as switch wires, you must ......

• Identify it as a switch live by marking with BROWN tape

• Identify it as a switch live by marking with RED tape

• Do nothing. The person carrying out the work will be competent and know which cable is live.

• Explain to the customer which wire is the switch live

When installing a mechanical room thermostat like the one in the image, what is the correct method of wiring?

• Power in to terminal 1, out on terminal 3, with neutral connected to terminal 2.

• Power in to terminal 3, out on terminal 1, with neutral connected to terminal 2.

• Power in to terminal 1, out on terminal 3, neutral is not needed.

• Power in to terminal 1, out on terminal 2, neutral is not needed.

When wiring a cylinder thermostat like the one in the image, the correct method of wiring is ........

• Power in to terminal 1 and out on Common

• Power in to Common and out on terminal 1

• Either way is fine.

• Power in to terminal 1 and out on terminal 2

Depending on what type of boiler you have, it may not be necessary to install a permanent live as well as a switch live. What document would you reference to confirm the wiring arrangement?

• IET wiring regulations

• Manufacturers Instructions

• BS 7671

• Gas Safety (Installation and Use) Regulations

What size cartridge fuse is suitable for the electrical supply to a typical domestic heating system?

• 3 amp

• 5 amp

• 13 amp

• 32 amp

What is the term we use to describe the wiring arrangement that prevents your boiler from firing when there is no call for heat?

• Boiler interlock

• Boiler cycling

• Thermo mechanical lock

• Electrolytic corrosion