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Фрагмент инструкции
Heater must not be portion of the element to prevent exposure of the effective heated operated in sludge. length. If the heater is not properly submerged, it may overheat, create a hazard of fire and shorten heater life. Do not operate heater if dry. MAINTENANCE 1. Heaters should be checked periodically for coating and corrosion buildup and cleaned if necessary. ELECTRIC SHOCK HAZARD. Disconnect all power 2. Tank should be checked regularly for sediment around the elebefore installing or servicing heater. Failure to do ments, as sediment can act as an insulator and shorten heater life. so could result in personal injury or property dam-3. Check for loose terminal connections. age. Heater must be installed by a qualified per-4. If corrosion or moisture is indicated in the terminal housing, son in accordance with the National Electrical check the conduit layout to correct the conditions that allow cor- Code, NFPA 70. rosion or moisture to enter the terminal housing. THERMAL FUSE INSTALLATION/REPLACEMENT ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing heater. Failure to do so could result in personal injury or property damage. Heater must be installed by a qualified person in accordance with the National Electrical Code, NFPA 70. The Thermal fuse device must be properly installed and these procedures followed or heater failure or fire may result. A liquid level control is a must as an additional safety feature to help minimize the possibility of fire. 1. Make sure all electrical power to the heater is shut-off. 2. Unscrew the head cover. Remove the wire nuts from the fuse leads and save for re-use. 3. Remove the “Sealing Putty” and pull the Thermal fuse out of its well. Clean the “putty” out of the well and save for re-use. 4. Check the Thermal fuse and the inside of the well to see if it is wet. If wet inside, dry out well. Immerse the tube into the solution. If moisture appears again inside the well DO NOT use the heater! Call the factory for further advice. 5. If the removed Thermal fuse is dry, proceed by using it as a guide to cut and strip the wires of the new Thermal fuse. 6. Re-connect the Thermal fuse leads to the extension leads using the original wire nuts. 7. Re-insert the Thermal fuse into the well making sure it is “fully seated” to the bottom of the well. 8. Re-seal using the original “sealing putty” or an RTV type sealant. 9. Replace the head cover, return the heater to the tank. 10. Turn the power back on. Thermal Fuse Temperature System — Be sure and satisfied that your process bath tanks are as well protected as possible from tank leaks, excessive evaporation, tank refill failures, and worker error. Grounded Electric Immersion Heaters are practical, efficient and safe when used properly and installed in tanks that have proper solution levels, good ventilation, trained operators and safeguards such as liquid level controls and Thermal fuse over-temperature sensors. Thermal fuse systems help reduce the hazards created by low liquid levels and when properly seated and wired, they will cut off the power to the heaters, thus avoiding the extreme temperatures resulting if solution levels are low enough to expose heater hot zones. Single Use Fuse (F) — Sensor consists of a one-time thermal fuse which is standard on all GS and GT over-the-side heaters. The F thermal fuse is wired in series with the controller. To operate properly the fuse must be fully seated to the bottom of the thermowell tube. When the fuse “blows”, shut off the main power to the heater, remove the spent fuse and install the new fuse. Refill the tank to proper level prior to turning power back on. Replacement thermal devices must be purchased from Chromalox. Resettable Fuse (RF) — Sensor consists of a Bi-metallic thermostatic sensor, an audible alarm, alarm relay, and reset button. The RF System operates on the same principle as the F except that the sensor does not “blow”. It operates as a Bi-metallic thermostat which “opens” and sounds the alarm. The reset button must be pushed to re-activate the heater and control, after the solution level in the tank has been raised to the proper level. FIRE/SHOCK HAZARD: Before replacing fuse, make sure the cause of the “failure” has been detected and corrected. THERMAL FUSE INSTALLATION/REPLACEMENT (con’t.) Thermal Fuse Replacement Protection Devices Model Number Used On F, FM, FH RF, RFM, RFH Standard OTS Heater FL, FLM, FLH RFL, RFLM, RFLH L-Shaped OTS Heater F Amp Capacity - 25 Amps; RF Amp Capacity - 5 Amps; Blank (low) Temp = 180°F; M (Medium) Temp - 230°F; H (High) Temp = 300°F. (Max Process Temperature) Medium temp. most common for this style heater. RF sensors require additional control components which include a Relay, Audible Alarm, and Manual Reset Pushbutton. Specify 120 or 240 V when ordering. Limited Warranty: Please refer to the Chromalox limited warranty applicable to this product at http://www.chromalox.com/customer-service/policies/termsofsale.as...
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