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FAQ Pulsacoil 2000
What is a PulsaCoil?
Pulsacoil 2000 is a thermal store, rather than hot water cylinders like a mega flow system. Like conventional hot water cylinders, a thermal store is a container filled with hot water just like a hot water cylinder, nothing else is the same. Once filled, the water in a thermal store never changes temperature. Instead, the heat stored in it is used to heat the tap water using a heat exchanger and elements. This allows the hot tap water to be delivered at full mains pressure, and is one of the primary benefits of installing a thermal store instead of a conventional hot water cylinder.
How does the Pulsacoil 2000 work?
An immersion heater heats the water inside the thermal storage tank. A thermostat (heat sensor in some Pulsacoil 2000 system) is attached to the domestic hot water outlet from the plate heat exchanger. When the thermostat records a fall in temperature, the circuit board sends a signal to the pump switching it on. The pump circulates stored hot water through the plate heat exchanger, heating it, and the circuit board turns the heating elements off one the thermostat reports the correct temperature. This system is proportional. The bigger the temperature fall seen by the thermostat, the faster the circuit board controls the pump speed.
The vast majority of Pulsacoil 2000 breakdowns fall into the following categories:
- Thermostat failure.
- Circuit board failure.
- Persistent tripping of the overheat protection thermostat.
- Immersion heater element failure.
- Immersion heater leaking.
- External Economy Seven time clock failure.
- Water scale-contaminated plate heat exchanger.
- Sensor failure
- Tank leaking
Find out more about Pulsacoil 2000 common problems
What you may be experiencing and what it could be relating to
- No power supply to Pulsacoil 2000 system – this does not allow the PSC (pump speed control) or any other internal components to work inside the Pulsacoil 2000. It does not allow a supply to go through to the elements either.
- No power supply to Pulsacoil 2000 elements – this does not allow the element to heat up, so this does not allow the water in the tank to heat up, resulting in no hot water in the storage tank.
- Main thermostat cut out on Pulsacoil 2000 – this cut the relay off not allowing a power supply to go to the two elements inside the Pulsacoil 2000 system. Therefore the elements do not heat up the water inside the storage tank.
- Elements thermostats cut out –this does not allow a power supply to pass through the thermostat into the element. Therefore the water inside the tank does not heat up. Due to there being a thermostat per an element it is very rare both become faulty at once or cut out at the same time. We have realised that most customer are only using 1 element when needed and never knew the additional element thermostat was faulty to begin with.
- Pulsacoil 2000 elements faulty – Elements on Pulsacoil 2000 do become faulty time to time. This can cause an element not to heat water inside a tank. Usually it is rare for both elements to become faulty at the same time but most customers do not know if there second element was faulty to begin with prior.
- Relay has become faulty – the relay when faulty will not allow power to pass through it into the elements thermostat and then to the element. The relay controls the supply to both elements and if faulty won’t allow power to either elements.
- PSC (pump speed control) failure – if the pump speed control if not working correctly will not supply the Pulsacoil 2000 pump with power. This will then not allow hot water to be pumped around an installation at all.
- Store sensor failure – This will stop the power supply to a Pulsacoil 2000 pump and not allow hot water to be pumped around an installation. It does this by direct connection to the PSC (pump speed control).
- Hot water sensor - This will not allow power to the Pulsacoil 2000 pump and not allow hot water to be pumped around an installation. It does this by connecting to the PSC (pump speed control).
- Plated heat exchange has calcium build up – this does not allow hot water to be exchanged at the plated heat exchanger and due to this the pump cannot pump hot water around the system.
Reasons for no hot water on economy 7 but booster works
- Economy 7 supply faulty – If no supply is coming to the economy 7 element, it cannot heat the water inside the storage tank overnight. So no hot water is present for the pump to pump around an installation.
- Economy 7 switched fused spur faulty – spurs are an isolation point for supplies to elements. If a spur becomes faulty, the supply to the element is not present and the water inside the tank is not heated up correctly.
- Economy 7 element faulty – a faulty element does not heat up water inside a storage tank overnight. No hot water will be present the following day for a pump to pump around an installation.
- Economy 7 element thermostat faulty – when a thermostat becomes faulty it prevent the supply of power to an element. The element then cannot heat the water inside the storage tank overnight.
- Economy 7 cables damaged – damaged cables can stop supplying power to economy 7 elements, they can also become a fire hazard.
Reasons for no hot water on booster but economy 7 works
- Booster supply faulty - if no supply is coming to the booster element, it cannot start heating the water inside the storage tank immediately.
- Booster switched fused spur faulty– spurs are an isolation point for supplies to elements. If a spur becomes faulty, the supply from the booster switch to the element is not present and the water inside the tank is not heated up.
- Booster element faulty – a faulty element does not heat up water inside a storage tank on demand.
- Booster element thermostat faulty– when a thermostat becomes faulty it prevent the supply of power to an element. The element then cannot heat the water inside the storage tank instantaneously.
- Booster cables damaged– damaged cables can stop supplying power to booster elements, they can also become a fire hazard if not attended to.
Reasons for fluctuation in temperature
- PSC (pump speed control) faulty – this then does not send a 230v power supply to the pump instructing it to pump hot water around an installation.
- Store sensor faulty – this tells the PSC (pump speed control) to send a 230v supply to the pump so it can pump hot water around the installation. When faulty it does not tell the PSC (pump speed control) to do this.
- Hot water sensor faulty - this instructs the PSC (pump speed control) to send the correct power supply to the pump. Then the pump pumps hot water around the installation. When faulty it does not send this instruction.
Reasons for temperature dropping over time
- Plated heat exchanger contaminated with calcium build up – when this occurs it slowly starts restricting hot water that should be pumped around an installation.
- Store sensor becoming faulty – this does not give the right instructions to a PSC (pump speed control) to pump hot water around an installation.
- Hot water sensor becoming faulty – this does not give the right instructions to the PSC (pump speed control) and then the pump is not pumping hot water around an installation.
- PSC (pump speed control) faulty – this then may only send a limited amount of voltage to a pump. This then does not allow the pump to pump a sufficient amount of hot water throughout an installation. Over a period of time this can become worse and worse.
Reasons for water leaking from Pulsacoil 2000
- Thermostat pocket rusted
- Storage tank inside system rusted
- Pipe work rusted
- Pipe burst
These all occur due to wear and tear. It is usual for the original element inside a Pulsacoil 2000 pocket to start leaking. Also a usual fault that occurred with a Pulsacoil 2000 system was the main thermostat to become faulty.
Common inexperienced engineer mishaps
- Incorrect testing of element – engineers tend to use only a continuity buzzer to check elements. This is incorrect as even a faulty element can show a closed circuit. A certain ohms resistance is required to establish if an element is faulty or not.
- Checking the pump incorrectly – a certain voltage is required at a Pulsacoil 2000 pump, if that voltage is present and the engineer is still not getting hot water and he tells you the pump is faulty, he could be wrong. This does not necessarily mean the pump is faulty. This can be correctly inspected in other ways to ensure it is the pump that is faulty.
- Not knowing how to test the relay – just because the relay is not allowing power to pass does not mean the relay is faulty. The relay is connected to other components that tell it to switch on or off. This can be inspected by bypassing a component safely.
- PSC faulty or not – most inexperienced engineers believe if the pump is working, the elements are buzzing a continuity the Pulsacoil 2000 PSC must be faulty. This is not always true, certain tests should be done prior to coming to that conclusion as it is the most expensive part second to the entire system.
- Heat sink compound – this not applied correctly on a sensor will not allow it to work correctly giving you a fluctuation in temperature or no hot water. Make sure the engineer applies this on the correct sensor.
- Water damages – if the mains water supply is not isolated correctly and the water pressure reduced, this can cause plenty of water to leak out of the system causing damages to your property.
- Not resetting thermostats – Some engineers believe if a thermostat is not showing continuity it must be faulty. This is not always true, sometimes a simple reset can fix the problem, if the problem persists then we would recommend changing it. Resetting the thermostat is simple if you know what you are doing but can be hard and dangerous if you don’t.
- Not check supply – this may sound simple but economy 7 supplies only come on at night. Different types of test will have to be done instead of your standard voltage test. This can save you money as the economy 7 supply is your network distributors responsibility.
What is A Pulsacoil 2000? More information
What is a Pulsacoil 2000? It is a thermal store. Its only similarity to a hot water cylinder is that the container is filled with hot water. Read more about Pulsacoil 2000.
Any questions relating to your Pulsacoil 2000 system?
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