The boiler is supposed to have 9 ltr capacity but from recent use I am not Sure it is. Is it possible that it is not filling up with 9ltr .? Topaz year 2000
Carver Rapid boiler
- Thread starter Robert_374373903
- Start date
No not really as the hot take off is located at the top, so it has to be full if you get any hot out of that as it is designed to work.
The hot is pushed out by cold entering at the bottom connection, so don't expect the 9 litres to be all pipping hot as some blending is inevitable as the cold water entrers.
The noise could be the build up of scaling in the boiler or on the element. Given it is a 2000 van there has been plenty of time for that to have occured. Servicing these boilers can be a high risk operation as they are made of aluminium alloys protected only by lacquer coating, so don't be temped to jump in too readily. "Arc systems biz", Gary is the go to man on these units.
Arc Systems biz
The hot is pushed out by cold entering at the bottom connection, so don't expect the 9 litres to be all pipping hot as some blending is inevitable as the cold water entrers.
The noise could be the build up of scaling in the boiler or on the element. Given it is a 2000 van there has been plenty of time for that to have occured. Servicing these boilers can be a high risk operation as they are made of aluminium alloys protected only by lacquer coating, so don't be temped to jump in too readily. "Arc systems biz", Gary is the go to man on these units.
Arc Systems biz
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I do agree, the problem is likely to be a build up of lime scale on the element. We have had that problem and the options are live with it if you can, or replace element. Unless you are competent this is a job for the experts.
Damian
Moderator
Another test I done was to reveal only 6ltrs came out before going cold.. Thank you all for answers./
Damian
Moderator
Robert, whilst the heater has a 9 ltr capacity the hot water is pushed out by cold water entering the tank as the tap is opened.
The water then has to travel along the pipe run to the tap, all the while cold water is entering the tank and cooling the water, so it is no surprise that you get 6 ltrs of hot reducing in temperature as more hot water is drawn off.
This is true of all similar heaters such as the Truma Ultrastore and Alde units.
The water then has to travel along the pipe run to the tap, all the while cold water is entering the tank and cooling the water, so it is no surprise that you get 6 ltrs of hot reducing in temperature as more hot water is drawn off.
This is true of all similar heaters such as the Truma Ultrastore and Alde units.
I think you should look at this
Whilst the results you got have made you question whether the heater (not "boiler" as it does not boil water) is working properly, Its difficult to know if your expectations are greater than the capability of the heater or whether the heater isn't working correctly.
A brief summary. The Cascade Rapide is storage water heater with a capacity of 9L (2 Gallons) The design has both gas and mains electric heating capability. The tank must be filled before any heating is attempted. The tank is filled by pumping cold water in at the bottom, until water flows continually through teh hot taps. The water in the tank is prevented from running back out of the heater by a non return valve built into the cold water inlet of the heater. Consequently once full the heater remains full, even if the cold water supply runs dry.
The gas side of the heater uses room sealed combustion that is controlled by a thermostatically controlled full cycle auto ignition system with flame failure detection. This system requires a 12V dc supply to run the control circuit. The electric side also uses a thermostat to control a mains powered low wattage element. The two control circuits are totally independent and can be used singularly or together.
To get hot water out at the top , you need to pump cold water in at the bottom. This automatically done when you open a hot tap. It will take approx. 30Min to fully heat all the water in its tank to about 65C. The heating time can be reduced to about 20min if both Gas and Electric systems are operated at the same time.
Water at 65C is too hot for a shower, and it is expected that it will be mixed with cold water in a mixer tap to deliver water at a comfortable shower temp. By mixing it in this way the water should be warm enough to allow two people to take consecutive brief showers.
I think you should look at this
Whilst the results you got have made you question whether the heater (not "boiler" as it does not boil water) is working properly, Its difficult to know if your expectations are greater than the capability of the heater or whether the heater isn't working correctly.
A brief summary. The Cascade Rapide is storage water heater with a capacity of 9L (2 Gallons) The design has both gas and mains electric heating capability. The tank must be filled before any heating is attempted. The tank is filled by pumping cold water in at the bottom, until water flows continually through teh hot taps. The water in the tank is prevented from running back out of the heater by a non return valve built into the cold water inlet of the heater. Consequently once full the heater remains full, even if the cold water supply runs dry.
The gas side of the heater uses room sealed combustion that is controlled by a thermostatically controlled full cycle auto ignition system with flame failure detection. This system requires a 12V dc supply to run the control circuit. The electric side also uses a thermostat to control a mains powered low wattage element. The two control circuits are totally independent and can be used singularly or together.
To get hot water out at the top , you need to pump cold water in at the bottom. This automatically done when you open a hot tap. It will take approx. 30Min to fully heat all the water in its tank to about 65C. The heating time can be reduced to about 20min if both Gas and Electric systems are operated at the same time.
Water at 65C is too hot for a shower, and it is expected that it will be mixed with cold water in a mixer tap to deliver water at a comfortable shower temp. By mixing it in this way the water should be warm enough to allow two people to take consecutive brief showers.
I think you should look at this
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