Page 268 - Electrician - TT (Volume 2)

ELECTRICIAN - CITS

Figure shows the essential parts of this type of water heater. The heater cistern is always full of water. The cold
water comes through the cistern and replaces the drained off hot water in the tank in equal volumes. The level
of the water in the cistern always remains constant as it is controlled by a floating-ball valve. During the heating
process, the water expands and a vent pipe is also provided for its expansion.

The main disadvantage in this water heater is that cold water mixes with hot water and thus reduces the
temperature of the water at the service point. This type of water heater is also known as a constant volume
pressure type water heater.
Point and only one heater is to be used, then this type of water heater is used only. This kind of water heater gets
water supply through the cistern (i.e., reservoir) which is connected to the water mains through a controlling float
valve.
The power consumption of a 25-litre bathroom geyser is either 1000 or 1500 W.
Figure shows the essential parts of this type of water heater. The heater cistern is always full of water. The cold
water comes through the cistern and replaces the drained off hot water in the tank in equal volumes. The level
of the water in the cistern always remains constant as it is controlled by a floating-ball valve. During the heating
process, the water expands and a vent pipe is also provided for its expansion.
The main disadvantage in this water heater is that cold water mixes with hot water and thus reduces the
temperature of the water at the service point. This type of water heater is also known as a constant volume
pressure type water heater.

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CITS : Power - Electrician & Wireman - Lesson 101-103