Chromalox Gnit 5 Users Manual PK479 3 CHX
GNIT-5 IM-PK479
GNIT-5 to the manual 65501f46-678e-4b41-819c-f795d77b99ed
2015-02-04
: Chromalox Chromalox-Gnit-5-Users-Manual-364644 chromalox-gnit-5-users-manual-364644 chromalox pdf
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Chromalox ® Installation Instructions SERVICE REFERENCE DIVISION 4 SALES REFERENCE SECTION (Supersedes PK479-2) GNIT PK479-3 161-506172-001 DATE AUGUST, 2006 GNIT Moisture and Corrosion Resistant Industrial Thermostat Features: • Rugged Design • Moisture and Corrosion Resistant • Teflon® Covered Capillary/Bulb • Large Setpoint Dial • Easy Installation • Line Voltage • DPST 25 Amp Switch Specifications — Model PCN Temperature Range (˚F) Volts GNIT-5 GNIT-12 360946 360954 30 to 220 30 to 220 120/240 120/240 Max Capillary Stock Amps. Length (Ft.) 25 25 5 12 S S Other temperature ranges available. Contact your local Chromalox Sales office. Teflon® is a registered trademark of DuPont Co. GENERAL Teflon®. The Teflon ® also covers the bulb. The thermostat is designed for 25 amperes resistive loads for either 120 or 240 Vac. FIRE/EXPLOSION HAZARD. This thermostat is not intended for use in hazardous atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in personal injury or property damage. NOTICE: Type GNIT Thermostats are designed for temperature control service only. Because they are not fail safe, they should not be used for temperature limiting duty. Specifications: Range Switch Action Current Accuracy Load Lamp Capillary Length 30 to 220˚F DPST (Double Pole/Single Throw) 25 Amperes, 120 or 240 Vac ±9˚F 120 Vac or 240 Vac GNIT-5, 5 Foot GNIT-12, 12 Foot Diameter of Teflon® Cover 5/16” OD Application Notes 1. Customer external fuse required. The system designer is responsible for the safety of this equipment and should install adequate back-up controls and safety devices with their electric heating equipment. Where the consequences of failure could result in personal injury or property damage, back-up controls are essential. The GNIT Non-Indicating Corrosive Resistant Thermostat is designed for applications in atmospheres where corrosive material is present. The double pole/single throw thermostat is available with either a 5 foot or 12 foot copper capillary which is sleeved with Process Temperature Differential — is variation in controlled process temperature between maximum, when thermostat turns OFF and minimum, when thermostat turns ON. This spread in temperature may be minimized by: 1. Making sure control is mounted to vertical surface. (See Step 1, MOUNTING.) 2. Avoid excess heating capacity (oversized heaters). 3. Locating control sensing bulb in optimum position between heat source and work. MOUNTING Note: Do not mount thermostat where it will be subject to vibration or shock. Do not mount adjacent to a large magnetic contactor, as vibration and shock will cause thermostat to interact erratically — resulting in chattering of the contactor. The air temperature in and around the thermostat enclosure should be kept as near to normal room temperature as possible… © 2010 Chromalox, Inc. never above 150˚F or below 30˚F. 1. Thermostat must be mounted in a vertical position only. 2. Use sheet metal or wood screws through the four 1/4” diameter mounting holes in baseplate to mount control. MOUNTING 3. NOTICE: A. Do not bend or deform sensing bulb. This will alter control calibration. B. Do not kink capillary tube. The resulting constrictions in fluid flow can destroy control function or broaden temperature differential. Minimum capillary tube bending diameter is 1/2” I.D. C. Any deformations of bulb or capillary that result in leakage of fluid from control renders control inoperative. D. Avoid passing control capillary tube through zones which have temperatures in excess of controlled process temperature. Erratic control or destruction of control function may result. 3.75 4.25 2.63 3.38 5.88 7.13 0.44 Side View 0.44 Front View Figure 1 WIRING ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing thermostat. Failure to do so could result in personal injury or property damage. Thermostat must be installed by a qualified person in accordance with the National Electrical Code, NFPA 70. ELECTRIC SHOCK HAZARD. Any installation involving thermostats must be performed by a qualified person and must be effectively grounded Note: Terminals provided for thermal fuse or other remote shutdown device. If no remote device, terminals must be jumpered. 120 Volt in accordance with the National Electrical Code to eliminate shock hazard. 1. Electric wiring to thermostat must be installed in accordance with the National Electrical Code and with local codes by a qualified person. CAUTION: Use copper conductors only. 2. Entrance for wiring is provided by two 1/2” conduit holes on each side of the unit. 3. Remove four face mounting screws and pull off front cover. 4. Connect wires according to wiring diagrams (Figures 2 & 3). 5. Replace cover and tighten screws. 6. Note: If load amperage or voltage rating exceeds switch rating, a contactor must be used. Contactor and wiring to be supplied by customer. 240 Volt Ground (Green) Nut supplied to ground control. 120V 25 Amps Max Line Fused Disconnect By Customer Hot (Black) Neutral (White) Connect hot line to screw terminal provided and neutral line (with pilot light & heater lead) to wire nut provided. Connect ground nut on NR25. Ground (Green) Ground (Green) NR25 NO Note: Terminals provided for thermal fuse or other remote shutdown device. If no remote device, terminals must be jumpered. Nut supplied to ground control. NO 10 AWG C C P Amber Heater Load (Black) Connect heater leads to wire nut provided and one side of the terminal block. Connect heater ground to ground screw on NR25. Wire Nut Note: Dotted lines represent wiring by customer. 10 AWG wire recommended. Figure 2 240V 25 Amps Max Line Fused Disconnect By Customer Connect power to 0.250" screw-on connectors provided. Connect ground to ground nut on NR25. NO NO C Note: Dotted lines represent wiring by customer. 10 AWG MTW or THHN wire recommended. Limited Warranty: Please refer to the Chromalox limited warranty applicable to this product at http://www.chromalox.com/customer-service/policies/termsofsale.aspx. 1347 HEIL QUAKER BLVD., LAVERGNE, TN 37086 Phone: (615) 793-3900 www.chromalox.com Ground (Green) 10 AWG NR25 C P Amber Heater Load (Black) Wire Nut Connect wire to 0.250" screw-on connector. Connect heater lead, pilot light lead, and wire from control to wire nut provided. Connect the other heater lead to the terminal block. Connect heater ground with grount nut on NR25. Figure 3
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