Severn Trent VAX4600 Series, Инструкция по эксплуатации

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4.3.7 Connect the two wires to the new element terminals and close the heater enclosure door.
4.3.8 Fill the water bath tank to the proper level by opening the manual filling valve and by energizing the
automatic fill solenoid valve. Visually check for water leaks before activating the electrical power to the
control circuit.
4.3.9 After the tank is filled, activate the electrical power to the heater circuit.
4.3.10 Allow the water bath temperature to stabilize. This may take 60 to 90 minutes.
4.3.11 Slowly open the manual gas discharge valves downstream of the vaporizer and start up the process
equipment.
4.4 Water Filling
If the loss of water indication (a cutoff of power to the heaters), does not actuate the fill solenoid valve, refer to
Section V.
4.5 Low Water Level Alarm, Water Level Control, and Low Water Level Cutoff Switches
(float switches) Refer to Figures 3 and 4
If any of the final control elements are not functioning properly, the cause may be a malfunctioning water level
switch or water temperature control switch. Refer to the wiring diagram to determine which switches affect the
operation of the malfunctioning control element, then using a voltmeter, follow the circuit to determine if a switch
is at fault.
4.5.1 Check for loss of voltage or blown fuses.
4.5.2 Check all devices that are actuated by these switches for proper operation.
4.5.3 If testing indicates that a switch is the cause, refer to Shutdown Section before proceeding.
4.5.4 Disconnect wiring and remove the switch from the tank. Note position and wire connections.
4.5.5 Check for flooded float. With an ohmmeter on the float terminals, manually actuate float. ON should
indicate zero resistance. OFF should indicated infinite resistance.
4.5.6 Clean and replace float as necessary, using Teflon base pipe dope or Teflon tape on the threads.
4.5.7 Refer to Startup Section.
Figure 9 - Disassembly and Cleaning of Chamber Components