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Using notes and a single-line diagram, show a typical layout of an oil-fired central heating and hot water system for a two storey dwelling house - Leaving Cert Construction Studies - Question 8 - 2007
Question 8
Using notes and a single-line diagram, show a typical layout of an oil-fired central heating and hot water system for a two storey dwelling house. Show three radiato... show full transcript
Worked Solution & Example Answer:Using notes and a single-line diagram, show a typical layout of an oil-fired central heating and hot water system for a two storey dwelling house - Leaving Cert Construction Studies - Question 8 - 2007
Step 1
Using notes and a single-line diagram, show a typical layout of an oil-fired central heating and hot water system for a two storey dwelling house.
Answer
The typical layout of an oil-fired central heating and hot water system consists of:
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Boiler: Located near the ground floor, it heats water which circulates throughout the system.
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Hot Water Cylinder: Positioned on the ground floor to store hot water for use.
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Radiators: Three radiators are shown on each floor, distributed as follows:
- First Floor: Two in bedrooms and one in the hallway.
- Ground Floor: One in the living room, one in the kitchen, and one in the dining area.
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Valves: Necessary valves such as the pressure relief valve, thermostatic radiator valves, and isolation valves must be indicated to control the water flow and maintain safety.
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Pipework: Typical sizes of the pipework can vary, with 22mm pipes for the main flow and 15mm for radiator connections. The single-line diagram should clearly represent these dimensions.
Step 2
On the diagram, show two features that ensure the safe functioning of the heating system.
Answer
Features ensuring the safe functioning of the heating system include:
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Pressure Release Valve: This valve automatically releases pressure if it exceeds safe levels, preventing potential explosions.
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Boiler High Limit Thermostat: This thermostat prevents the water temperature from exceeding safe limits, ensuring the system operates within safe parameters.
Step 3
Using notes and freehand sketches, show two details that should be incorporated into the design of the central heating system to ensure the economical use of oil.
Answer
Two details that should be incorporated for economical oil use are:
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Zoned Heating: Implementing motorised valves operated by time-switches or room thermostats allows control of hot water flow to specific radiators. This ensures that unused rooms do not waste heat.
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Insulation of Hot Pipes: Using insulated materials around hot water pipes minimizes heat loss, improving the overall efficiency of the heating system.