Korsnäs, Finland (Tel)+358(0)63641310 
   Home   arrow Water Hygiene          Vist our new product information section for a comprehensive list of our products and more!
    

Chofu Propane  (CHG)



Chofu Propane gas heater –Efficient heating in a simple way
The Chofu Propane gas heater is a highly efficient water heater especially designed for Hot Tubs. The water is self circulating, using the "thermosiphon" principle. Hot water rises and creates low pressure, which sucks the water from below. This eliminates the need for a circulation pump and electricity, making it possible to heat the water with the heater placed on the outside. One great advantage is that there will be more space in the tub, making it possible to choose a smaller model.

An external heater is also preferable when considering safety aspects. The gas heater is virtually maintenance free since it has no loose parts and needs no electricity. Since the construction has been designed for outdoor use, it should not be used indoors. It is weather resistant and can stand outside uncovered even when it is raining. It can also be covered. If covered, make sure there is enough air circulation and follow the recommended measurements. See the picture below left.

Operation
The heater starts manually with an automatic ignition switch. The main switch should be outside the tub. The switch should be placed so that it is easy to reach from both inside and outside the tub.
Features
  • Works without electricity
  • Manual “remote control” with ignition switch
  • Weather proof housing
  • Automatic shut-off if the temperature in the heat exchanger, where the thermostat is, exceeds 45°C

Size
43 cm (height) x 43 cm (length) x 25 cm (width), weight 8.5 kg

Heating
The effect of the Chofu Propane heater is approximately 14 kW. The heating speed is approximately 10° C per hour for 1 000 litres of water. The gas use is 1 kg per hour.

WARNING!

  • The white “distributor pipes” has to be connected when the heater is in use.
  • Don’t put fingers or toes in the “distributor pipe”.
  • The heater may not be used till the water level rises above the highest pipe.
  • Get used to empty always the heater when it won't be used especially when the temperature sinks below 0.
  • When using saltwater the heater should always be rinsed with fresh water after every use.
  • The same applies for chlorinated water or something similar when chemicals are used.
 		Installation
OBSERVE! If you are the least bit unsure how to go about assembling and installting the gas heater you should have a professional do it.

Chofu Propane is connected to a hot tub (smallest diameter 150cm) with a connection kit (included in complete hot tub package). It is not included when ordering only the heater but can be ordered separately as an accessory, the kit consists of 50 mm PBC tubing, flexible rubber hoses including clamps, one straight connection for the side of the hot tub and one 90° for the base. See picutures below.

Procedure:
  1. The heater is placed on a level foundation of wood, brick or cement. The heater should be placed at the same height, or at most 45 mm lower, as the hot tub. This is important for the circulation and so that the water can be drained out of the heater during cold weather.
  2. For the upper connection pipe (outlet) a 60 mm hole is drilled in the side of the hot tub, 320 mm from the surface the tub is standing on. On the bottom on the opposite side a similar hole (inlet) is made for the water coming from the heater.
  3. The straight connection including pipes is screwed into the side and the curved one into the bottom. Connect the upper pipe inc. the “distributor pipes” under the bench. Use a sealing compound on the joints.
  4. The black neoprene tubes should be connected to the heater. If the tubes are lubed with a bit of food oil they are easier to connect. Secure using the included clamps.
  5. The heater is connected to a gas connection equipped with a 30 mbar pressure reducer.
Also read the following!
Remote control - Ignition - Do it right - Winter usage