Blodgett GCX-2-6 Installation & Operation Manual page 18

INSTALLATION AND OPERATION MANUAL, GAS FIRED PRESSURELESS COOKER WITH
DIRECT STEAM KETTLES, MODELS GCX-2-6, GCX-2-10, GCX-2-6-6 AND GCX-2-6-10
3.0 OPERATION INSTRUCTION FOR BOILERS WITH CSD-1 CONTROLS (Continued)
Normal Boiler Operating Cycle
Water Fill Cycle
3. On the initial filling of the boiler, the reset switch must be activated to initialize the safety
lockout circuit. Once the water in the boiler has reached the proper level, the level control
will open the circuit to the fill solenoid valve, stopping the flow of water to the boiler. As the
water is consumed in the production of steam, the level control will close the circuit to the fill
solenoid and water will be supplied to the boiler.
Firing Cycle
The gas valve is operated by pressure sensing devices. On the initial operation of the boiler,
steam generation should reach 11 psi in approximately 15 minutes. At this point the "Operating
Pressure" switch will open, closing the gas valve. When pressure drops to 9 psi, the pressure
switch closes, the gas valve will open and ignition should occur.
Should the pressure rise more than 14.5 psi the "Override Pressure Switch" will close the circuit
to the override solenoid valve, releasing excess steam.
Condensing Drain
A thermostat is located in the drain assembly and is activated by the temperature of steam.
The thermostat opens the cooling solenoid valve, in turn supplying water to the drain to
condense steam.
Automatic Blowdown Valve
If the unit has an automatic blowdown valve, it is activated by the main power switch. The
boiler will be drained should the main power switch be turned "OFF".
SAFETY LOCKOUT CONDITIONS
High Temperature Condition
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 put in a state of lockout. The "Temperature"
pilot light (red), and the "Standby" pilot (amber), will come on.
PART NUMBER 10122R1 18 2003-10-09