21
CHIMNEY
The section of the chimney pipe must be not less than that of the boiler outlet connection and must follow the
shortest and most direct path to the outside and be as vertical as possible.
For the height follow the regulations in force.
If the fume exhaust pipe is connected to the flue it must be suitably pitched with adequate inclination to direct
the fumes upwards.
The fume exhaust pipe must not be connected to a flue which is already connected to another boiler.
The flue must be perfectly gas-tight.
In any case constrictions or local losses of load which could disturb operation must be avoided.
WATER SUPPLY
The generator must be supplied with water with hardness less than 0.1°F made up of the condensation re-
covery and the make-up water softened by a purifier (cation resin) or demineralised. The water supply must
always come from the supply tank; a direct connection to the mains water or to the purifier is not allowed.
The suction piping must be as straight as possible and its diameter must be larger than that of the connection
on the pump (see connection diagram).
The supply water must be at a temperature of at least 70°C as lower temperatures cause deterioration in the
generator coils.
If the water temperature is lower than the value indicated above the supply water must be heated.
The tank capacity must be adequate for the boiler capacity and normally at least the same as the consumption
of an hour operation at maximum load.
The tank must be fitted with a drainage tube with cock direct to the sewers for regular drainage and to empty
the tank for cleaning.
Water pump must not suck from the bottom of the tank but slightly higher to avoid the entry of impurities.
