Blodgett SB-10E - Manual (Page 7)

7
3.0 OPERATING INSTRUCTIONS (Continued)
Normal Boiler Operating Cycle
Water Fill Cycle
On the initial filling of the boiler, units equipped with CSD-1 controls require that the
“Reset” switch be pressed to initialize the safety lockout circuit. Once the water in the
boiler has reached proper level, the level control will stop the flow of water to the boiler.
As water is consumed in the production of steam, the level control will supply and
maintain safe water level in the boiler.
Firing Cycle
The elements are operated by pressure sensing devices. On initial operation, the boiler
should reach 11 psi in approximately 15 minutes. At this point the operating pressure
switch will open, de-energizing the elements. When the pressure drops to 9.0 psi, the
pressure switch closes, energizing the elements.
Condensing Drain, (Optional)
A thermostat is located in the drain assembly and is activated by the temperature of
steam. The thermostat operates the cooling solenoid, supplying water to the drain to
condense the steam.
Automatic Blowdown Valve, (Optional)
If the unit has an automatic blowdown valve, it is activated when the main power switch
is turned “ON”. The boiler will drain when the main power switch is turned "OFF.”
Safety Lockout Conditions
High Temperature Condition, Standard Controls
A high temperature safety device is installed on the boiler. Should the temperature
exceed the limit of this device, the boiler will be shut down. As the temperature returns
to a safe level, normal boiler operation will resume.
High Temperature Condition, CSD-1 Controls
A high temperature safety device is installed on the boiler. Should the temperature exceed
the limit of this device, the boiler will be shut down and switch to a state of lockout. The
“Temperature” pilot light (red), and the “Standby” pilot (amber), will come on.