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5.1 Explanation of Main Controller Screens
1.
Operation Screen: This screen displays a live reading of the pressure chamber operating
conditions. These parameters include: gas temperature, gas pressure and superheat.
2.
Control Water Temperature: This screen displays a live reading of the water tank temperature.
This is the temperature reading that is used for PID control of the water temperature and all
appropriate water temperature alarms.
3.
Auxiliary Water Temperature: This screen displays a live reading of the water tank temperature
after heat is transferred through the pressure chamber. This temperature reading is used as a
reference to indicate heat transfer and heat transfer efficiency.
4.
Heater Power: This screen displays the estimated heater power/energy output required to
vaporize the current feed rate of chemical. It is based off the 4-20 mA control signal sent to
the heater control box. This can give the user an estimate of current energy consumption and if
chamber/heater cleaning is required due to irregularly high consumption.
5.
Solenoid Override: This screen displays the current status of the water refill solenoid (either open
or closed). From this screen the solenoid can be overridden from normal operation to open (and
fill the water tank) by pressing and holding the key.
6.
Alarm Status: This screen displays any alarm conditions that may currently be active, or displays
“normal” if no alarm conditions exist. If multiple alarms exist, the controller will cycle all
active alarms on this screen every two seconds. For more information on alarm conditions and
preventative actions refer to Sections III.7 and V.
7.
Password Screen: This screen allows access to all the editable features of the VPH-10000.
To access the configuration screens the correct password must be entered on this screen. The
password for the VPH-10000 is “100” and can be entered using the and keys. Once the
correct password is blinking the user may press the key to access the remaining screens.
8.
Vaporizer Units: This screen allows the user to adjust the operating units used. Temperature
values can be displayed in either degrees Fahrenheit (F) or in degrees Celsius (C). Pressure values
can be displayed in either psig (psi) or barg (bar). To change units, press the or key until the
appropriate parameter is blinking, then press the key.
9.
Water Temperature Alarm: This screen allows the user to adjust the high and low water
temperature alarm settings. Due to inherent safety and design features the adjustable range of the
low water temperature alarm has been set to 160 – 170˚F (71 – 77˚C) and the adjustable range of
the high water temperature alarm has been set to 195 – 205˚F (91 – 96˚C). To change values, press
the or key until the appropriate parameter is blinking, then press the key to increase or the
key to decrease.
10. Gas Pressure Alarm: This screen allows the user to adjust the pressure value above which the gas
pressure alarm will active. This setting has an adjustable range of 250 – 300 psig (17 – 21 barg).
To edit this value, press the and keys when this value is blinking until the appropriate value
is achieved.
11. Super Heat Alarm Temperature: This screen allows the user to adjust at what superheat
temperature below which will activate the alarm and all relevant functions (Section III.7). This
value is adjustable from 0 – 50˚F (-17 – 10˚C) with “0” disabling the alarm. To edit this value,
press the and keys when this value is blinking until the appropriate value is achieved.
Recommended superheat alarm values are: 20ºF for chlorine, 30ºF for sulfur dioxide and 12ºF for
ammonia.
