OPERATING PROCEDURE OF HOT WATER GENERATOR

• PROCEDURE:

• Checks to be carried out before starting the Hot water generation system.
• Check the Main power supply is available.
• Check the water level in the makeup tank and if needed fill up to the level.
• Check and ensure that the hot water inlet and outlet valves are in open condition.
• Check the steam line outlet valve should be in opened condition in Pressure Reducing Station (PRDS) and ensure the steam pressure NMT 3.0 Kg/Cm2.
• Ensure the availability of compressed air pressure NMT 4.0 Kg/Cm2
• STARTING PROCEDURE:
• Switch ‘ON’ the control supply of the PID controller.
• Switch ‘ON’ hot water circulation pump.
• Set the temperature on the PID controller 50°C, + 10°C by using the UP and DOWN arrow keys on PID controller.
• Open the steam line inlet valve.
• When temperature reaches set temperature in the hot water return line PID cutoff the steam supply. 
• When the temperature reaches below set temperature in the hot Water return line PID SWITCH ON the steam supply.
• SAFETY PRECAUTIONS
• Don’t open the PRV inlet steam valve while the water circulation pumps in ‘OFF’ position.
• Don’t carry any maintenance works while the system is running, or steam and hot water pressurized in the pipelines.
• STOPPING PROCEDURE
• Close the PRV inlet steam valve.
• Close the compressed air valve.
• Switch ‘OFF’ the control supply to the PID controller.
• After the water temperature comes 40 º C switches OFF the hot water recirculation Pump.
• Record the parameters every two hours as per Annexure-I.

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• REFERENCES:
•   Not Applicable
• ANNEXURES: 

• ENCLOSURES: SOP Training Record.

• DISTRIBUTION:
• Controlled Copy No. 01                     Head Quality Assurance
• Controlled Copy No. 02                 Head-Engineering
• Master Copy                           Quality Assurance Department
• ABBREVIATIONS:
• Kg/Cm2     :        Kilogram / Square Centimeter.
• PRV           :        Pressure reducing valve.
• NMT         :        Not More Than.
• NLT         :        Not Less Than
• REVISION HISTORY:
•  CHANGE HISTORY LOG

Annexure-I
HOT WATER GENERATION LOG SHEET

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