Gledhill Pulsacoil 2000 Repairs Are What We Do.
If the you require our services, please call 0800 046 1241. Below is more information Gledhill Pulsacoil 2000 repairs.
Pulsacoil FAQ’s. – Further information about all Pulsacoils.
Pulsacoil Repair. – Overall information on our service.
Pulsacoil 2000. – Information on Gledhill Pulsacoil 2000.
Pulsacoil 2000 Manual. – Official Gledhill Pulsacoil 2000 manual.
Pulsacoil 2000 Repair. – Tips on Gledhill Pulsacoil 2000 repairs.
Gledhill Pulsacoil 2000 Spares.
Pulsacoil BP. – Information on replacement system for Gledhill Pulsacoil 2000.
Information On Gledhill Pulsacoil 2000 Repairs.
Gledhill PulsaCoil 2000 systems are thermal stores. They are not hot water cylinders.
Like conventional hot water cylinders, a thermal store is a container filled with hot water. This is the only similarity.
Once filled, the water in a Gledhill Pulsacoil 2000 never changes. Instead, the heat stored in it is used to heat the tap water using a heat exchanger.
This allows the hot tap water to be delivered at full mains pressure. Also it is one of the primary benefits of installing a thermal store. Conventional hot water cylinder do not do the same.
An addition benefit of the Gledhill Pulsacoil 2000 is that the hot water being delivered by the cold water mains. This reduces the chances of legionnaires. This is because the water coming out of the tap is not stored. It is fresh water through the water mains.
The Gledhill PulsaCoil 2000 then transfers heat into the hot water tap using a pump and an external plate heat exchanger. A plate heat exchanger is a block of very thin stainless steel plates. These are arranged so that cold mains water can flow through one set of spaces between the plates.
This then allow hot water from the Gledhill Pulsacoil 2000 store to flow through an alternate spaces. Heat transfers through the plates and heats the cold mains water on it’s way to the hot tap.
We would highly recommend you do not use anyone who does not have previous experience in carrying out Gledhill Pulsacoil 2000 repairs. This is not a conventional hot water system system and works differently.
So before you get your Gledhill Pulsacoil 2000 repairs carried out by us or anyone else, read this page and request our Pulsacoil self check mini guide. This guide will help you.
How does the Geldhill PulsaCoil 2000 work?.
The Gledhill Pulsacoil 2000 is fitted with immersion heaters which heat the water inside the Pulsacoil 2000 store. This should be an incoloy element.
A thermistor (heat sensor) is attached to the domestic hot water outlet from the plate heat exchanger. When the thermistor records a fall in temperature, the circuit board inside the Gledhill Pulsacoil 2000 runs the pump.
The pump circulates stored hot water through the plate heat exchanger, heating it, and the circuit board turns it off again when the thermistor reports a temperature rise. This is why it is important to have the right pump installed. (If it’s the wrong pump it will not work correctly).
This system is proportional. The bigger the temperature fall seen by the thermistor, the faster the Pulsacoil 2000 circuit board runs the pump.
This way the designed flow temperature can be maintained at almost any flow rate when a hot water tap is turned on or when the shower is turned on.
Common problems with Gledhil Pulsacoil 2000.
The vast majority of Gledhill PulsaCoil 2000 breakdowns to which we are called out to fall into one of the following categories:
Gledhill Pulsacoil 2000 Repairs Info #1. Depleted water in the Gledhill Pulsacoil 2000 store.
A Gledhill PulsaCoil 2000 is filled with water using a small header tank installed separately above the unit. In most cases this is a grey tank.
This header tank is not always permanently connected to the mains supply. It may be controlled by a ball valve. This should not be if your Gledhill Pulsacoil 2000 does not have an overflow pipe. (Most Gledhill Pulsacoil 2000 repairs reveal this overflow pipe is not present).
This then means water is lost from the thermal store through evaporation. It can also be lost form leaks in the Gledhill Pulsacoil 2000 system.
Before getting your Gledhill Pulsacoil repairs carried out check the water level in this tank. We highly recommend this. As a rule of thumb we recommend the tank be half full.
If the water level in the Gledhill PulsaCoil 2000 falls too low the pump does not have enough water to pump through the heat exchanger. So when a hot water tap is turned on the unit will not deliver hot water.
The problem starts intermittently. The unit should runs noisily. The answer is to check the water level in the header tank and top it up to the waterline moulded into the wall of the tank. Again as a rule of thumb, half way.
We would highly recommend you request our self check Pulsacoil mini guide by completing our web form on the side bar. This gives you a visual representative of how much to fill it.
You may not need a Gledhill Pulsacoil 2000 engineer to carry out your Gledhill Pulsacoil 2000 repairs if the steps in the mini guide are followed correctly. You can request the guide from the side bar.
Gledhill Pulsacoil 2000 Repairs Info #2. Thermistor failure.
The heat sensors (there are actually two) can become unreliable with age.
This usually presents as unpredictable hot water performance. It could also give unstable hot water temperature.
The thermal store will be hot, but the pump will not run fast enough when the hot tap is open. It may also not run at all.
The circuit board may be reporting thermistor failure via it’s red LED. This is not always reliable.
One flash per second indicates flow thermistor failure, seven flashes per second indicates the pumped return thermistor has failed.
Two flashes per second means the circuit board thinks both thermistors are good. Please note this is not always true in our experience. By changing both apparently good thermistors on a unit behaving inconsistently can often cure the problem.
In some cases the sensors inside the Gledhill Pulsacoil 2000 system may not have failed. They may be covered in dust or calcium, reducing the detecting ability. Instead of cleaning them, we recommend replacing.
If this is the case, you will need a Gledhill Pulsacoil 2000 repairs specialist to resolve this.
Gledhill Pulsacoil 2000 Repairs Info #3. Circuit board failure.
No flashes on the circuit board of a Gledhill Pulsacoil 2000 LED means circuit board failure, usually. Please check you have a supply to it.
If there is 230v across the live and neutral terminals on the board yet no LED flashing, then board failure is virtually certain.
Also if the light LED remains lit on the Pulsacoil 2000 Gledhill PCB, this could mean the PCB has become faulty. Without an onsite check it is difficult to say.
Gledhill Pulsacoil 2000 Repairs Info #4. Persistent tripping of the overheat protection thermostat.
The red ‘Fault’ light comes on and the Gledhill Pulsacoil 2000 fails to heat up until the Pulsacoil 2000 is reset.
An upgrade kit is available from us to cure this. Call us to find out. The image of this component is below.
The old overheat protection thermostat is removed from the circuit and new immersion heater thermostats fitted incorporating new, separate overheat thermostats.
We would personally recommend you keep this as it is an additional safety device in the Gledhill Pulsacoil 2000 system. It is not essential with the upgrade.
Before calling an engineer to carry out your Gledhill Pulsacoil 2000 repairs if the red light is displaying, reset it and wait 24 hours. It may even be longer. If it keeps tripping you may need to replace it.
Gledhill Pulsacoil 2000 Repairs Info #5. Immersion heater element failure.
The unit fails to heat up. this is easily diagnosed by measuring the resistance. Test the resistance on the element between live and neutral. Or a simple visual inspection will do. Make sure it’s not leaking.
When the resistance is measured, we recommend whoever is carrying out your Gledhill Pulsacoil 2000 repairs inspects for leaks or calcium build up at the element(s). (This is referred to in the next step Gledhill Pulsacoil 2000 Repairs Info #6) Immersion heater leaking.
Gledhill Pulsacoil 2000 Repairs Info #6. Immersion heater leaking.
Older ‘Shel’ brand immersion heaters are fitted as original Gledhill Pulsacoil 2000 equipment. These seem to suffer from leaks in the thermostat sensor pocket. Even some new ones have the same problem.
We’ve seen water emerging from the copper tube in which the thermostat sensor is housed, this rarely occurs at the element joint due to them being incoloy coated.
This is clearly dangerous as it introduces water into the electrical connection of the heater element head, and it often results in thermostat failure as well as tripping of MCB’s.
The only repair is to replace the whole immersion heater. Do not think you can have it repaired.
When getting your Gledhill Pulsacoil 2000 repairs carried out, we would recommend you request that the thermostat rod be replaced as well as the are affected.
Gledhill Pulsacoil 2000 Repairs Info #7. External Economy Seven time clock failure.
Gledhill PulsaCoils 2000 are usually connected to an Economy Seven tariff electricity supply.
When there is no separate off-peak power supply to the unit an Horstmann electronic 7 or equivalent timer will have to be fitted.
These seem to fail after a few years with lower brands and no longer deliver power to the immersion elements. We recommend Horstmann.
Gledhill Pulsacoil 2000 Repairs Info #8. Water scale-contaminated plate heat exchanger.
The plate heat exchanger inside a Gledhill Pulsacoil 2000 is prone in some areas to water scaling.
This presents as maximum water temperature becoming progressively lower, and in the final stages of scaling, the flow rate from the taps reducing too.
The fix is to either fit a new plate heat exchanger, or to de-scale the existing heat exchanger using conventional de-scaling techniques.
Pulsacoil 2000 Repairs Mistakes Found.
Gledhill Pulsacoil 2000 Pump.
A common mistake we find as a company is when when another company has carried out repairs on a Pulsacoil 2000 system pump by replacing it.
The pump used in a Pulsacoil 2000 should be a Grundfos 15-50X18. No other is recommended.
This is a modulating pump which starts to spin at a lower voltage. Usually 70 Volts.
Many contractors believe that a standard 15-50X60 or 15-50X130 work correctly with a Pulsacoil 2000. When carrying out Pulsacoil 2000 repairs they tend to replace it with these incorrect pump. These only work at 230 Volts.
The picture above is what should be showing on the Pulsacoil 2000 Pump. The below picture is an example of the most common incorrect pump installed inside the Pulsacoil 2000 system. Please look at them carefully.
Gledhill Pulscoil 2000 Thermostat Rod.
Whilst most contractors carry out Gledhill Pulsacoil 2000 repairs thinking the thermal storage system works like an immersion cylinder, they could not be more wrong. Please keep reading to find out why.
As the system stores hot water inside the thermal store, it transfers heat via the plated heat exchanger.
This requires the hot water in the thermal store to be hotter then 70oC. It is recommended that the water temperature for peak performance be anything between 73oC to 75oC.
In most cases we have seen the thermostat to to be the incorrect thermostat rod. This does not reach the desired temperature thus not allowing the system to work correctly. This will cause the pump to work more then it should need to.
Below is an examples of the most common incorrect thermostats. This is one of many.
Gledhill Pulsacoil 2000 Element.
As this is a thermal store tank the immersion element needs to be an incoloy element and not a standard 11″ copper element.
The incoloy coating gives added protect to the element, allowing it to be more durable. A copper element will fail quicker inside a thermal store.
When having your Gledhill repairs carried out, we highly recommend you confirm the correctly type of element is used.
Below is a picture of a standard 11″ copper immersion element. Also the correct element for a Gledhil Pulsacoil 2000. Please look at them carefully.
Gledhill Pulsacoil 2000 Pump Bypass.
When an engineer does not know how to fix the system correctly when hot water is present they bypass the pump speed control and feed the pump with 230v.
This can cause boiling hot water to come out of your hot water pipes and causes the pump to overheat as it is continently running.
A qualified engineer should check the store and water sensors are detecting the right temperature.
Also they should check the pump is running at a lower voltage. He will also check the pump is not seizing up. It should start at 70 volts.
Please remember that the system sends less voltage if it doesn’t require much hot water to be transferred. Please remember it should spin at 70 Volts.
Also the Pump Speed Control board should be inspected to confirm that has not become faulty. Also signs of damages should be checked for. Check for burn marks or no LED flashing.
Avoid unnecessary costs. We have been to lots of jobs where a contractor has carried out repairs on a system which is beyond economical repair.
This basically means the system can be fixed. There is really only one situation where the system cannot be repaired. This reason is if the main copper cylinder inside the unit is leaking.
Spotting this is not so difficult. Below is a picture of a system which is leaking.
In orange we have circled areas where this unit is leaking. Please take a look. If you are not sure, call us. Or email us pictures.
Before calling any engineer to carry out your repairs wait. Request our self check Pulsacoil mini guide which has help many people. It could also help you.