Taylor-Wharton Auto Fill Laser Pak - Manual (Page 24)

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Order replacement parts from the valve manufacturer. Be sure to give all information on the valve nameplate,
including the factory part number, to ensure receiving the correct parts for these valves.
Atkomatic – Circle Seal Controls Inc.
P.O. Box 3300
Corona, California 92878 U.S.A.
Phone: 951-270-6200
Fax: 951-270-6201
Web: www.circle-seal.com/atkomatic/
Safety Device Replacement
In order to replace the safety devices the system pressure must reduced to zero gauge pressure. It is not
necessary to empty the system of liquid. Push the start/stop button on the control panel and turn the power
switch off. Close the liquid auxiliary valve on the bulk tank. Manually open both of the vent valves (V3-A &
V3-B). Be sure that the vapor phase isolation valves (V6-A & V6-B) are open. Once the vessel pressure
gauges (PI-A & PI-B) indicate zero and flow through the vent valves has stopped, the safety devices may be
replaced.
If a rupture disc (BD) bursts, determine and correct the cause of the rupture before replacing the device. These
devices should be replaced annually as a preventive maintenance procedure. The rupture discs on this tank are
sealed assemblies that must be replaced as a unit.
Vessel relief valves (RV) that leak or fail to operate at the set pressure should be replaced immediately. Do
not attempt to repair these components.
Instruments
The major cause of a malfunctioning level transmitter (PT-1) is an open equalization valve (V-7). Closed
liquid or vapor phase isolation valves (V-5 & V-6) are another likely cause of malfunction. Leakage in the
gauge lines may also cause the instrument to read incorrectly. Instructions for recalibrating the level
transmitters are included in the section titled “First Fill”. If the problem is not readily corrected, replace the
transmitter with a spare.
A malfunctioning vessel pressure gauge (PI) or vessel pressure transmitter (PT2) may be caused by a closed
liquid or vapor phase isolation valve (V-5 or V-6). If the problem is not readily corrected, replace the gauge
or pressure transmitter with a spare.
Controller
A qualified electrician should perform controller maintenance. Most controller components are readily
available Allen-Bradley parts. The controller wiring drawing, included in the appendix of this manual,
contains a detailed wiring schematic and bill of materials. The most likely problem on the controller is a
failed fuse. Should it be necessary, the programmable logic controller (PLC) may be sent to Taylor-Wharton
for reprogramming. Contact the Taylor-Wharton Customer Service Department at 1-800-898-2657.