23
6. Operating Controls and Components
1.
Chlorine Gas Temperature Thermocouple:
The chlorine gas outlet temperature is monitored
by a K-type thermocouple through the top fl ange of the chlorine pressure chamber. For added
corrosion protection it is installed with a Hastelloy-C thermowell. Its main function is to provide
visual indication of the chlorine gas outlet temperature, and together with the chlorine gas pressure
transmitter, is used to calculate and then display the superheat value. Should the amount of
superheat go below the alarm level, an alarm will be activated to shut down the pressure reducing
valve, and thereby prevent liquid chlorine from fl ooding through the vaporizer.
2.
Chlorine Gas Pressure Transmitter:
The chlorine gas outlet pressure is monitored by a
diaphragm protected pressure transmitter. The scale of the transmitter is 0 – 300 psi (0 – 21 bar).
Its main use is to provide visual indication of the chlorine gas pressure in the chlorine pressure
chamber, and together with the chlorine gas temperature thermocouple, is used to calculate and
then display the superheat value. The operating pressure of the vaporizer should be in the range of
38 – 210 psi (2.6 – 14.5 bar). Should the pressure go outside this range corrective action must be
taken (see Troubleshooting).
3.
Water Tank Temperature Thermocouple:
The water tank temperature is controlled and
monitored by one K-type thermocouple. The thermocouple is located in the water tank. The water
temperature thermocouple is used for PID control of the heater to maintain a stable water tank
temperature of 180˚F (82˚C). It provides the measurements for the low water temperature alarm
and high water temperature alarm.
4.
Water Level Control:
Water level in the water tank can be controlled both automatically and/or
manually. For automatic control, there are four conductive level sensors in the water tank (one low
level, one low fi ll, one high fi ll, and one overfi ll alarm). Each alarm is then used in conjunction
with the water refi ll solenoid to open or close the solenoid and maintain the water level. For
manual control, there is a clear glass sight tube on the front panel for the user to determine the
operating level. When the sight glass is below
1
⁄
3
full, water should be added. When the water is
above
2
⁄
3
full water should be stopped. Water may be manually refi lled using the 3" through hole
on the collar plate, or piping into the existing ½" water refi ll solenoid slot.
5.
Water Refi ll Solenoid:
The water refi ll solenoid is used for automatic control of the water level.
It is 2-way, normally closed, Nema 4x rated, with stainless steel housing and is available in either
120 VAC or 240 VAC. Inlet and outlet connections are ½" FNPT. Water supply pressure must be
at least 10 psi (0.7 bar) and less than 60 psi (4.1 bar).
6.
Cathodic Protection System:
Corrosion protection of the chlorine pressure chamber, water tank,
water tank piping and all other components is provided by the use of four (4) sacrifi cial magnesium
anodes. The amount of protection provided is adjustable by using the potentiometer next to the
ammeter. The amount of current provided should be in the range of 50-250 mA. Any more will
unnecessarily consume the anodes and any less will provide insuffi cient cathodic protection. A
¼ lb (113 g) of sodium sulphate should be added if this amount of current cannot be regularly
supplied. Based on normal operating conditions these anodes will be consumed in about one (1)
year, and should be replaced yearly. During initial operation little to no current may appear on
the controller due to the electrical insulation provided by the enamel painting. This is normal and
may take up to 6 months until a reading appears. The vaporizer is still being protected during this
period.
7.
Water Heater:
The water heater is a 4-inch fl anged type 18 kW electric heater and includes an
over temperature thermocouple to shut off the heater in case of malfunction. The heater will also
be shut off by the controller in the case of a low water level or high water temperature alarm.
Confi rm that the voltage requirements of the heater match that of the incoming three phase power
supply before operation.
Summary of Contents for VPH-10000-1 Series
Page 1: ...1 Series VPH 10000 1 Vaporizer Instruction and Operation Manual VPH 10000 1 Rev 9 11 19 ...
Page 13: ...13 FIGURE 4A Relay Connections Box ...
Page 14: ...14 FIGURE 4B Signal Connections Box ...
Page 34: ...34 FIGURE 9 Chlorine Vapor Pressure Curve Vapor Pressure ...
Page 35: ...35 FIGURE 10 Sulfur Dioxide Vapor Pressure Curve Vapor Pressure Min Superheat ...
Page 36: ...36 FIGURE 11 Ammonia Vapor Pressure Curve Vapor Pressure Min Superheat ...
