Step

Step Description

Results

Precondition

System is OFF

TURNING ON the system

Turn ON the control panel

The system is ON

Switch on the mixer 1 (tank 1 : Reactor)

Turn on the mixer 1 from the control panel 

(Reactor--->Mixer ON)

Mixer 1 is ON and start Mixing the Water (Reactor)

Open the valve V1 (tank1 : Reactor)

Open the valve V1 to transfer the mixture from tank 1 (reactor) to tank 2 (cooler)

(Reactor---->Reactor valve V1) 

The Water is transferred to Cooler (tank 2)

Open the valve 6 (tank 3 : HOT WATER)

Open the valve V6 to add water from HOT WATER TANK (tank 3) to the cooler (tank 2)

 (HOt WATER TANK---->HOT WATER TANK valve V6)

-The water is in the cooler (tank 2)

-the flow sensor not working

Open the valve V2 (tank 2: Cooler)

Turn ON the pump 1 

Open the valve V2 to transfer the Water from cooler (tank 2) to crystallizer (tank 4)

(cooler---->cooler pump 1)

(cooler---->cooler valve V2)

The Water are transferred to the crystallizer (tank 4)

PS: pump 1 stopped pumping

Switch on the mixer 2 (tank 4 : Crystallizer)

Turn on the mixer from the control panel 

(Crystallizer--->Mixer ON)

Open the valve V3 (tank 4: Crystallizer)

Open the valve V3 to transfer the Water from crystallizer (tank 4) to the filter (tank 5)

(crystallizer---->crystallizer valve V3)

The Water transferred to the filter (tank 5)

Open the valve V7 (TANK 3: HOT WATER)

Open the valve V7 to add water from HOT WATER TANK (tank 3) to filter tank(tank 5) 

(HOT WATER TANK---->HOT WATER Valve V7)

The Water transferred to filter tank (tank 5)

Open the valve V5 (tank 5: Filter)

Turn ON the pump 2

Open the valve V5 The Water is pumped from tank 5 to tank 4 for the second crystallization

(filter---->filter Valve V5)

Water transferred to the crystallizer (tank 4)

PS: pump 2 stopped pumping

switching OFF the system

switch OFF the system

the system is OFF

Postcondition

system is OFF