Crown GMT-6-6 Installation & Operation Manual page 17

INSTALLATION AND OPERATION MANUAL, DIRECT STEAM KETTLES MOUNTED ON GAS
BOILER CABINET BASE, GMT-6, GMT-10, GMT-6-6, GMT-10-6, GMT-10-10
4.0 OPERATION INSTRUCTIONS FOR CSD-1 EQUIPPED UNITS (Continued)
Daily Shutdown Procedure
1. Turn "OFF" the power switch. Observe that the burners go off.
2. Open the manual blowdown valve, if so equipped. If the appliance is equipped with an
automatic blowdown solenoid valve, the boiler's contents, water and steam, will be blown out
and exhausted through the appliance drain. The cold water solenoid valve will be activated.
Complete Shutdown Procedure
If the appliance is not intended to be operational for a lengthy period, then shut it down
completely.
1. Open the manual blowdown valve, is so equipped.
2. Shut off all supplies of power, gas and water to the appliance.
Normal Boiler Operating Cycle
Water Fill Cycle
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 stop the
flow of water to the boiler. As water is consumed in the production of steam, the level control
will replenish water to the boiler.
Firing Cycle
The gas valve is controlled by pressure sensing devices. On initial operation of the boiler,
steam generation should reach 11 psi in approximately 15 minutes. At this point the "Operating
Pressure" switch will close the gas valve. When pressure drops to 9 psi, the pressure switch
opens the gas valve and ignition should occur.
Should the pressure rise to more than 14.5 psi the "Override pressure switch" will open the
override solenoid valve, releasing the excess steam.
PART NUMBER 10072R1 17 2005-09-21