The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
How To Design And Install Plumbing
The top openings of the heater are joined into one pipe and reconnected into one end of the tank above its center. The return connection to the heater must always be taken from the end opposite the flow to provide a movement of water through the entire installation.
The hot-water supply must be connected to an opening in the tank located as close to the flow connection as is possible.
Fig. 234 shows the connection of a storage heater to the water supply system. The cold water is delivered into the tank as the illustration indicates. The hot water is taken from the top of the insulated tank and connected to the distribution system.
Fig. 235 illustrates how a steam heater of the converter variety can be connected to a horizontal storage tank. This type of installation generally is used in industrial buildings. The heating unit is connected to the horizontal tank in the same manner as the coal heater installation which was discussed previously. The steam supply to the heater is controlled by a thermostat installed in the storage tank.
Fig. 236 shows a storage tank connected to a furnace coil. This arrangement is unique in that the water is tempered before it passes through the storage heater. There is economy in this type of installation, because a storage heater costs more to operate than does this unit. The storage heater is connected into the hot-water supply pipe. A valve installed between the two connections serves as a by-pass device should the storage heater fail.
This type of heater usually is installed in residences of the better class.
The under water heater, Fig. 237, with its connections to the storage tank, has become a very common and efficient installation in recent years. The heater is installed below the water line of the heating boiler. Its connections to the boiler must be valved because this type of installation requires an auxiliary heater to provide hot water in the summer season. The heater is connected to the vertical or horizontal storage tank in the usual manner.
