The drain plug which is on the outside of the flue cowl should be unscrewed to permit draining. When the end of the drain plug thread is reached the plug can be pulled out a small distance, yet still be retained in the thread and permit draining to occur. To allow the system and tank to drain effectively, open all hot and cold taps while the heater is still warm. If your system also includes a Crystal Water System, make sure that the pump is emptied of any water and unscrew the filter cartridge to permit it to drain.
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The drain plug which is on the outside of the flue cowl should be unscrewed to permit draining. When the end of the drain plug thread is reached the plug can be pulled out a small distance, yet still be retained in the thread and permit draining to occur. To allow the system and tank to drain effectively, open all hot and cold taps while the heater is still warm.
If your system also includes a Crystal Water System, make sure that the pump is emptied of any water and unscrew the filter cartridge to permit it to drain. To recommission the heater:- Close cold taps and the drain plug and reconnect the pump.
Let the system fill with water until water flows steadily from the hot taps. About two gallons of water will be required. Once the hot taps are flowing freely close them and switch on the Cascade 2. This indicates that the water heater is full. Check that the gas and electrical supplies have been connected and turned on. The green light will come on and remain on. The heater is automatically switched off until the voltage is high enough.
This is usually due to failure of the gas supply or, in the case of a new installation, air in the gas pipes. Switch off and on again, which resets the controller and initiates a new ignition sequence. To clear air from the gas lines, several repetitions may be required.
If the water at the taps is hotter that you want, the temperature may be adjusted as follows:- a Switch off heater at the controller and allow to cool for at least 10 minutes. This can not be done on newer modles. General Description The Cascade 2 is a storage water heater of 9 litre 2 gallon capacity. It is installed through the wall of the caravan and from the outside only the balanced flue is visible.
All working parts are contained in a single unit which is easily removable from outside the caravan. The Cascade 2 is operated from a remote wall switch which is mounted in a convenient position. The green and yellow lights together show that the voltage at the heater is too low and that the heater has automatically been switched off.
The yellow light will go out and the heater will switch itself on again when the voltage is restored. The green and red lights together show that the heater has failed to light during its 10 second ignition period and has shut itself down.
It can be reset by switching off and on again. Temperature control is by a thermostat which is adjustable by means of a thumbwheel inside the cowl. In use, hot water flows from the hot water outlet of the heater when cold water is pumped into the inlet. The outlet is positioned below the top of the heater tank to produce an air cap to accommodate thermal expansion.
The control system will maintain the water at the temperature selected by switching the burner on and off as required. The lights do not show whether the burner is alight or not. The normal functions of the heater are backed up by two safety features. The first is a pressure relief valve which vents the tank contents into the cowl if the internal pressure rises above 3 bar 44p.
The second is a fusible plug fitted in the heat exchanger behind the cowl. Should the temperature of the heater become too high, the plug will melt and vent steam and water onto the burner which will put it out, shutdown the heater down and show the red light.
The heater may not then be used until the thermostat and fusible plug have been replaced. In the event of a gas leak, search for it using soapy water.
If unsuccessful, turn of the gas at the cylinder and seek professional assistance. Water Supply Notes. The Cascade Water Heater is suitable for installation into any existing caravan water system, whether manually or electrically pumped, with only the following precautions.
It must not be directly connected to mains water supply. It must have a pumped cold water input pressure no exceeding 20 p. A pressure of approximately 10 p. If you are in doubt as to the maximum pressure capability of your present pump, check with its manufacturer 3. If the pump is manually switched and is capable of delivering more than 20 p.
The use of a positive displacement pump controlled by a pressure switch with a large differential between switch on and switch off pressures can produce unacceptable temperature variations at a shower that is fed by mixer taps. If a shower facility is required a centrifugal pump controlled by switched taps or a Whale pressure switch is recommended. We recommend the Carver Crystal water supply system which co-ordinates with the Cascade 2. Electrical supply notes The Cascade 2 water heater is designed to operate from a nominal 12v DC negative earth supply.
This is usually provided in a caravan by a car type 12v battery. The heater will continue to operate satisfactorily down to Below The yellow light may illuminate when the water pump is operating due to the high current consumption of the pump. This will cease when the pump stops. The yellow light may also illuminate when the heater is fed by very light gauge wire or when the caravan is fed from the car by an extension lead.
In these cases the wire gauge must be increased to reduce the voltage drop. Low voltage may also be due to poor or corroded connections. Both the positive and negative feeds to the wall switch are fused. Failure of the left hand fused fuse indicates a failure in the heater, failure of the right hand negative fuse indicates a problem in the earth bonding of the caravan itself.
There are no user serviceable parts within the electronic control box behind the burner. If the seal on this box is broken the guarantee is invalidated. All electrical connections should be well made and insulated.
Carver Cascade Water Heater - Cascade 2
Ensure that the overall depth of the heater will fit into the locker or cupboard see fig 1 Ensure that any trims can be refitted or cut to make a watertight seal and a neat installation. Remove the template from these instructions see fig 3. Ensure that the bottom of the template, i. Remove the template and drill a 4mm dia. Ensure that the drill is kept square to the wall. Ensure that the template is square to the caravan body. The line CD should be level with the caravan floor or above any strength beam on the base of the wall.