Lennox International Inc. GSB8-S 사용자 설명서

24

HOW A STEAM SYSTEM OPERATES
The water in the boiler is heated until it reaches the boil-

ing point. As the water boils it turns into steam. The steam 

rises from the top of the water through the supply main to 

the radiation units. As it passes through the radiators it re-

leases its heat and condenses into water. The water returns 

to the boiler through the return main. Most residential sys-
tems operate at less than 1 pound steam pressur

e.

FILLING SYSTEM WITH WATER
On steam heating systems the boiler is partially fi lled with 

water. It is very important to the proper operation of the 

entire system that your boiler be fi lled to the proper level. 

The correct water level is about halfway up the glass water 
level gauge as marked on the boiler jacket. To fi ll:

Close the boiler drain valve.

Open the valves at the top and bottom of the glass 

water level gauge. Also open the drain valve at the 

bottom of the gauge.
Open the fi ll valve and allow water to run into the 

boiler.

 

Never run water Into a hot empty boiler.

Allow boiler to fi ll until water runs out the gauge drain 

valve. Then close the gauge drain valve.
Continue to fi ll boiler until water reaches the indicated 

water line. This is about halfway up the glass tube.

WATER LEVEL
The normal water level is shown on the right side of the 

boiler and is 24” above the fl oor. The normal water level 

is determined when the boiler is off and cold, i.e. when 

all of the water in the system is inside the boiler and the 

return piping below the water line, and everything above 

the water line is air, no steam. When the boiler is making 

steam, the water level will drop two to three inches below 
the normal water line.

AUTOMATIC GAS VALVE
The Automatic Gas Valve opens or closes according to the 

heat requirements of the thermostat and temperature limit 

control. It closes if the pilot goes out. Each individual con-

trol must be operating correctly before any gas can pass to 

the burners. Any one control can hold the gas supply from 

burner regardless of the demand of any other control.

THERMOSTAT
Keep it set at a desired room temperature. If windows 

are to be opened or heat is not needed, move thermostat 

pointer to a lower setting.

In the event of failure of any component, 

the system will not operate or will go into 

safety lockout. The system is completely 

self-checking. On every call for heat, each 

component must be functioning properly 

to permit operation. On safety lockout 

the system has to be reset by turning the 

thermostat to the lowest setting for one 

minute, then back to the normal setting.