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Summary of Contents for Chromalox SCR
- Page 1 Technical Manual SCR Control Panel Maintenance, Operation, and Installation Instructions PK574 A-40076 S/N 0037-75264 June, 2022...
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Page 2: Warning Page
HIGH VOLTAGE is used in the operation of this equipment, DEATH ON CONTACT may result if personnel fail to observe safety precautions. Learn the areas containing high-voltage connections when installing or operating this equipment. Be careful not to contact high- voltage connections when installing or operating this equipment. -
Page 3: Table Of Contents
Table of Contents Section Page Warning Page ................................ Table of Contents .............................. Foreword ................................Safety Summary ..............................Chapter 1: General Information and Safety Precautions ..................... Chapter 2: Operation ............................Chapter 3: Description ............................Chapter 4: Scheduled Maintenance ........................Chapter 5: Troubleshooting ..........................Chapter 6: Corrective Maintenance ........................ -
Page 4: Foreword
Foreword This manual provides operation, installation, and maintenance instructions for the SCR Control Panel(s) manufactured by Chromalox s of La Vergne, Tennessee. This manual is prepared in accordance with Chromalox Standard Operating Procedure (S.O.P.) 9091-12006. The chapters are arranged as follows:... -
Page 5: Safety Summary
Safety Summary General safety precautions listed in the plant Safety Manual should be closely complied with to prevent injury to personnel or damage to equipment. Only one hand should be used when servicing live equipment. Accidental death or severe KEEP AWAY FROM LIVE CIRCUIT. injury may occur if a current path is created through the body from one hand to the other. -
Page 6: Chapter 1: General Information And Safety Precautions
All safety precautions necessary for the protection of l-2.2 REFERENCE DAT A Reference data that applies to personnel and equipment are listed in the safety the SCR Control Panels is listed in Table 1-1 . summary. The definition of warning, caution, and note are as follows:... - Page 7 Table 1-1 Reference Data Characteristics Manufacturer: Chromalox Precision Heat and Controls Modes of Operation: Continuous Operating Ambient Temperature: 4° F to 122° F (-15° C to 50° C) Humidity: 0 - 100% Non-condensing...
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Page 8: Chapter 2: Operation
Panel(s). The first few pages contain general infonna- tion regarding SCR control panels. Operation The Chromalox SCR Control Panel is a complete feed-back/closed loop/control system. The solid state power controller provides accurate temperature control very efficiently. Fast acting fuses are included to protect the solid state devices, (see note). -
Page 9: Chapter 3: Description
Chapter 3: Description Chromalox SCR control panel consists of a power controller, temperature controller or tenninals for customer supplied control signal, overtemp controller or terminals for customer supplied shut down signal and a fused control transfonner that provides control power for 120 vac devices. Positive power shut down is provided in case of overtemp condition, by using a contactor or shunt trip and a disconnect switch. -
Page 10: Chapter 4: Scheduled Maintenance
Chapter 4: Scheduled Maintenance 4-1 Introduction 4-3 Preventative Maintenance Schedule Preventative maintenance consists of inspections, tests The schedule for conducting preventative maintenance and cleaning of equipment at scheduled intervals. It depends on how much the equipment is used. Table helps detect and correct conditions that could cause 4-1 lists the suggested maintenance schedule, which is equipment malfunction. - Page 11 Table 4-1 Preventative Maintenance Schedule Frequency Title Applicable Paragraph 6 months Enclosure Exterior 4-5.1 6 months Enclosure Interior 4-5.2 6 months Wiring and Connections 4-5.3 6 months Lights and Fuses 4-5.4 1 year Contactors 4-5.5...
- Page 12 Table 4-2 Required Maintenance Tools, Materials, and Test Equipment Tools Materials 1. Flashlight 1. Safety tags 2. Vacuum cleaner with a nonmetallic nozzle 2. Dry, lint free rags 3. Screwdrivers--normal duty (6-inch) and heavy duty 3. Non residue forming, electrical cleaner/degreaser (10-inch) (CRC Cable Clean, Chemtronics Electro-Wash or 4.
- Page 13 When released from the energized position, the 4-5.1 ENCLOSURE EXTERIOR Inspect the panel contactor must drop out to the full deenergized exterior as follows: position. If there is a question about these positions, a. Wipe off all dust, moisture, and oil with a lint free first energize the contactors electrically, then de-ener- cloth.
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Page 14: Chapter 5: Troubleshooting
Chapter 5: Troubleshooting 5-1 Introduction 4-3 Preventative Maintenance Schedule This chapter includes troubleshooting tables, for use in The schedule for conducting preventative maintenance repairing the heater power controller. A volt ohmmeter depends on how much the equipment is used. Table will be required to perform certain steps in the trouble- 4-1 lists the suggested maintenance schedule, which is shooting charts. - Page 15 5. Defective SCR module 5. Measure the gating signal as described in step 4. Measure the voltage at input (loine) side of the SCR. If the voltage at the line side is proper and the gate siggnal is present, replace the...
- Page 16 2. If the output stays full ON in measure gate voltage as in step 4 of Table 5-1. If they all read 0 DC, replace the SCR(s); otherwise, replace the control board. 3. Defective temperature 3. If panel is equipped with...
- Page 17 L1 to X1, L2 to X2 and L3 to X3. All phases should read approximately 0 VAC. Any phase that reads high voltage has a bad SCR module. Replace the SCR(s) as required. 5. Firing package bad. 5. Measure gate to cathode voltages.
- Page 18 3. Check power source for erratic operation. Repair if needed. 4. Defective temperature 4. Check the command controller or firing package. signal at the SCR control board input terminals. If command signal is erratic, replace controller otherwise control board. Or control signal.
- Page 19 Table 5-5 Contractor Trouble Analysis Symptoms Immediate Action Probable Cause Remedy 1. Contacts chatter 1. Turn OFF power and 1. Poor contact in controller. 1. Check contact wear. Control panel is check all connections. Replace worn contacts. unstable. 2. Low voltage. 2.
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Page 20: Chapter 6: Corrective Maintenance
Chapter 6: Corrective Maintenance 6-1 Introduction 6-1 .1 This chapter provides instructions for the adjustment and repair of the SCR control panel. 6-1 .2 Observe all safety precautions and tag all wires to be disconnected. 6-2 Tools, Test Equipment and Material Refer to table 6-1 for the list of tools, test equipment and material required to maintain the controllers. - Page 21 User needs should dictate any site preparations. 6-6 Return of Material Material returned for repair, whether in or out of warranty, should be shipped prepaid to: Chromalox Precision Heat and Control 1382 Heil-Quaker Boulevard Lavergne, Tennessee 37086-3536 Attn: Customer Service Department Contact factory for "Return Authorization"...
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Page 22: Chapter 7: Installation
Chapter 7: Installation Use 3/8" hex bolts to mount tlhe control panel on a wall, bulkhead, or channels. For free standing/floor mounted panels, prepare foundation and use proper anchoring. For proper cooling of the solid state devices do not block the air intakes or exhaust (louvers) by any means. -
Page 23: Blank Page For Customer Notes
Notes and Other Pertinent Information (This page is left blank for customer notes and pertinent information) -
Page 24: Service Contact Information
Chromalox, Inc. 103 Gamma Drive Pittsburgh, PA 15238 Phone: (412) 967-3800 Customer Service Hotline: 1-800-443-2640 Limited Warranty: Please refer to the Chromalox limited warranty applicable to this product at http://www.chromalox.com/customer-service/policies/termsofsale.aspx. Chromalox, Inc. 1347 Heil Quaker Boulevard Lavergne, TN 37086 (615) 793-3900 www.chromalox.com...
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