8202CHPPT2

What is the term Honeywell use to describe a system controlled with two-zone valves?

• Z plan

• Y plan

• S plan

• X plan

Where are all the wires connected from the programmer, thermostat, zone valves and energy source on a Honeywell S plan system?

• Control panel

• Fuse box

• Junction box

• Wiring centre

Which device connected to the primary pipework maintains a minimum flow rate through the boiler and limits circulation pressure when alternative water paths are closed?

• Zone valve

• Pressure relief valve

• Expansion vessel

• Automatic bypass valve

Name the valve that looks like a mid-position valve, which is used on a Y plan system but instead is based on a hot water priority system (W plan), providing either heating or hot water but not simultaneously?

• Diverter valve

• Isolation valve

• Check valve

• Balancing valve

Which component on a sealed system replaces the function of a feed and expansion cistern on the vented system which allows the expansion of water to take place safely?

• Frost thermostat

• Zone valve

• Pressure gauge

• Expansion vessel

Which term is commonly used to describe a multi-zone system?

• Z plan

• X plan

• Y plan

• S plan plus

What is the device that controls the flow of water to both the heating and hot water circuits, reacting to both the cylinder and room thermostat?

• Zone valve

• Programmer

• Two-port motorised valve

• Three-port mid-position valve

Where is the frost thermostat positioned in a central heating system to prevent vulnerable parts from freezing?

• Airing cupboard

• Kitchen

• Living room

• Garage

What is the control that uses an externally fitted temperature sensor to reduce the circulation temperature of the flow from the boiler as the external temperature rises?

• Optimum start

• Delayed start

• Weather compensation

• Home automation

What is the arrangement of system controls that ensure the boiler does not fire when there is no demand for heat?

• Thermostat

• Programmer

• Multiple boiler installation

• Boiler interlock