22
7.
Water Heater: The water heater is a 4-inch flanged type 18 kW electric heater. The heater is
housed in a self-insulating chamber to minimize heat losses 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. Confirm that the
voltage requirements of the heater match that of the incoming three phase power supply before
operation.
8.
Water Pump: The water pump is available in either 120 or 240 VAC. Inlet and outlet ports are
3
⁄
4
" NPT and the assembly comes with unions for quick disconnection. The main function of the
water pump is to circulate the water past the water heater to increase heat transfer efficiency. The
pump is designed to automatically shut down should a low water level alarm condition exist.
7. Alarms and Features
Refer to Table 4 for a description, and action of all alarms incorporated into the vaporizer unit. Note
that while some alarms take preventative action themselves, an operator should always monitor an
alarm situation and take preventative action if need be or the situation persists. For information on
troubleshooting techniques see Section V.
The vaporizer controller is equipped with a red LED for alarm indication. All relevant alarms will
appear on the alarm screen in two second intervals should multiple alarm conditions exist.
Alarm
Description
Action Taken by Controller
Low Superheat
The temperature of the outlet gas is less
than the alarm value.
Shut off the electronic pressure reducing
valve until desired superheat is achieved.
High Cl
2
Pressure
Pressure in the chlorine pressure chamber
exceeds the alarm value.
Shut off the heater. Action must be
taken by user to reduce pressure. See
troubleshooting.
Low Water Temp
The water tank temperature out of the
heater is less than the alarm value.
Shut off pressure reducing valve until
desired water temperature is achieved.
High Water Temp
The water tank temperature is above the
alarm value.
Water heater is shut off until water
temperature is below the alarm value.
Low Water Level
Water is below minimum operating level.
Shut off heater, pump, and pressure
reducing valve. Open water solenoid
until desired water level is achieved.
Water Overfill
The water level exceeds that of the water
tank.
None. Action must be taken by user.
See troubleshooting.
EXP Burst Disc
The rupture disc of an expansion chamber
assembly has blown. Pressure switch must
be wired into main controller for actuation.
None. Action must be taken by user.
See troubleshooting.
PRV Burst Disc
The rupture disc of the pressure relief
assembly has blown. Pressure switch must
be wired into main controller for actuation.
None. Action must be taken by user.
See troubleshooting.
TAbLE 4: Vaporizer Alarms
