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Define a y plan central heating system?
The reason this system is called a 'Y' plan is because of the shape of the 3 port valve.Heated water from the boiler is diverted to the hot water coil or the radiators depending on which service the programmer is asking for and which thermostat is calling for heat. The 3 port valve also acts as a switch to turn on heating system components. Therefore you need a certain sequence of switches to work in order for the system to operate. For example with radiators:1. The programmer reaches a timed period where the radiators require heat.2. The programmer activates a live supply to the room thermostat.3. If the room is cold then the thermostat will switch this live supply to the motor in the three port valve.4. The three port valve will motor over to open the radiator water outlet. (Takes about 10 seconds)5. When the valve opens it switches a separate live supply which feeds the boiler and pump.6. Boiler and pump receive live supply and operate. Soon you should feel some hot water in your radiators.The three port valve has 2 live supplies to motor it one way or the other depending on what the system is calling for: hot water or hot radiators or both.
Do you need a thermostat seal if you have no thermostat?
if you mean the gasket between the thermostat housing and the hose connection bell yes you do but you should use a thermostat to keep the engine at constant operating temperature for which it was designed it will run more efficiently and last longer
Why would one need an underfloor heating thermostat?
An underfloor heating thermostat enables one to reach the perfect temperature in the house. It is also perfect for enabling the heating to turn on when the room temperature reaches low numbers.
How do you size a boiler relief valve?
The relief valve should be at least as large (in BTU/hr capacity) as the input of the boiler. A 3.5 million input boiler would need then a relief valve to handle at a minimum 3.5 million BTU/hr.
Why are direct acting relief valves not used on high pressure and high flow hydraulic systems?
As a direct relief valve opens, its spool or poppet pushes against a spring. As the spring compresses, the system pressure necessarily rises due to the spring constant. To handle large flows, you need a big valve. To minimize the pressure rise due to the spring constant you need a long spring. To minimize the pressure drop due to the valve body, you need a big valve body, which in turn needs a bigger spring. As the operating pressure goes up, you need stiffer (typically bigger)springs. Eventually the cost of the valve is prohibitive and a pilot operated valve is called for. There are benefits to using direct operated valves which may out weigh the costs, but most direct operated valves are limited to medium and low pressure settings.
Why are only two radiators in my home working after I changed my thermostat out with a new one?
If these are old style hot water radiators (the tall cast iron type) they probably are air-locked and need to be bled. There is a valve at one end near the bottom to do this. Open this valve slowly and with caution since it will initially release trapped air (under pressure) and then very hot water. Close the valve when it stops sputtering from trapped air. If they are electric radiators, they might be burned out or have bad electrical connections. You will need an electrician to correct this problem.
Do 8 cylinder diesel trucks need a thermostat?
If, by "thermostat" you mean the radiator flow valve that controls engine coolant temperature, yes. All liquid cooled engines need such a thermostat.
Define a y plan central heating system?
The reason this system is called a 'Y' plan is because of the shape of the 3 port valve.Heated water from the boiler is diverted to the hot water coil or the radiators depending on which service the programmer is asking for and which thermostat is calling for heat. The 3 port valve also acts as a switch to turn on heating system components. Therefore you need a certain sequence of switches to work in order for the system to operate. For example with radiators:1. The programmer reaches a timed period where the radiators require heat.2. The programmer activates a live supply to the room thermostat.3. If the room is cold then the thermostat will switch this live supply to the motor in the three port valve.4. The three port valve will motor over to open the radiator water outlet. (Takes about 10 seconds)5. When the valve opens it switches a separate live supply which feeds the boiler and pump.6. Boiler and pump receive live supply and operate. Soon you should feel some hot water in your radiators.The three port valve has 2 live supplies to motor it one way or the other depending on what the system is calling for: hot water or hot radiators or both.
How do you know if you need a thermostat in your car?
1. If the engine is running hotter than usual. 2. If the vehicle's temperature gauge is showing the low. 3. If upon inspection you see an open thermostat valve Symptoms like these likely indicate you need a new thermostat
Central heating will not heat up?
You need to troubleshoot the system, is the thermostat turned up, are the radiators turned on, is the boiler on and working, if all the obvious are in order then you may have a faulty water pump or blockage (solid or air) in the system.
When setting the thermostat for cold air in a 2003 Grand Caravan it still pumps hot air into van - why?
When you set the "thermostat" you're actually opening or closing a valve that lets hot water from the engine cooling system run through the heater core. That valve is stuck open. more than likely you have a bad thermostat, or the system could need recharging.
Do radiators come with the cap?
No they do not. They will need the old style with the spring...
What causes a 2002 Jeep Liberty to overheat?
Hi, Check to see if your vehicle need to have the thermostat changed or if the radiator is clogged which will make the antifreeze not flow to keep your engine cool. Clogged radiators is a known issue. Hope this helps you.
How do I properly wire a zone valve in a heating system?
To properly wire a zone valve in a heating system, you need to connect the thermostat to the zone valve, and then connect the zone valve to the boiler or furnace. Make sure to follow the manufacturer's instructions and use the correct wiring diagram for your specific zone valve model.
Where is the thermostat in a 2002 Hyundai?
It is fixed to the left corner of the cylinder head and connected to the upper radiator hose (the hose you see right in front of the valve cover) You will need to remove the two bolts that hold the thermostat cap which is connected to the hose that I just mentioned, inside you will find the thermostat.
Where is the thermostat in a 2002 Hyundai accent?
It is fixed to the left corner of the cylinder head and connected to the upper radiator hose (the hose you see right in front of the valve cover) You will need to remove the two bolts that hold the thermostat cap which is connected to the hose that I just mentioned, inside you will find the thermostat.
How much coolant does a 2000 Mercury Sable need?
According to page #206 of the Owners Manual:* 12 valve Vulcan engine (the smaller one) - 11.6 quarts* 24 valve DOHC engine (no room left in the engine compartment - 10.6 quartsSee "Related Questions" below for lots more about Taurus - Sable coolant and radiators
