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4 I sec, вот Inumber зоот REFERENCE PK451 161-058028-001 DATE DECEMBER, 1986 Chromalox Indicating Thermostat Control — Model BCT Model Numbers are listed below Model BCT-800 Figure 1 Specifications — Table A Thermal Element Dual Temp. Range Model Number Bulb end Cap Material Cep Length (FT) Bulb (IN) Dla. Length -40° to 1 20°F -40° to 50°C BCT-800-4BC BCT-802-4BC" Copper 6 % 6Й BCT-800-4BS BCT-802-4BS* Stainless Steel 6 % 6Й 0°F to 250 °F - 20° to 120°C BCT-B00-6BC ВСТ-Э02-6ВС* Copper Copper 6 6 % % 4?„ 4*. BCT-B00-6BS BCT-802-6BS* Stainless Steel 6 4*. BCT-0OO-6BS-TEF BCT-S02-6BS-TEF " Teflon Covered Stainless Steel 10 4’/,. 0° (0 400 °F "20° to 200 °C BCT-800-7B5 BCT-802-7BS* Stainless Steel 6 % 2’A 0° to 400 “F 10° to 340°C BCT-aoo-BBS BCT-802-8BS* Stainless Steel 6 3 50° to 1000° F 10° to 540-C BCT-800-9BS BCT-802-9BS ‘ Stainless Steel 6 4>/„ Explosion Proof Models -40° to 120°F -40° to 50DC BCT-820E-4BC BCT-022E-4BC’ Copper 6 % 6Й BCT-B20E-4BS BCT-822E-4BS’ Stainless Steel 6 6'A 0°F to 250 °F - 20 °F to 120°C BCT-820E-SBC BCT-B22E-6BC' Copper 6 4”/,„ BCT-820E-6BS BCT-822E-6BS* Stainless Steal 6 \ 44, BCT.820E-6BS-TEF BCT-822E-6BS-TEF " Teflon Covered Stainless Steel 10 44, 0 to 400 °F -20 to 200 °C BCT-820E-7BS BCT-B22E-7BS* Stainless Steel 6 2\ 50 to 650 °F 10° to 340°C BCT-820E-8BS BCT-822E-8BS* Stainless Steel 6 X 3 60 to 1000 °F 10° to 540°C BCT-820E-9BS вст-аггЕ-эвэ1 Stainless Steel 6 % 4*. 'Dual Switch Models 1ЭВ6 Edwin L. Wiegand Divisan, Emerson Etectnc Co. DIMENSIONS BCT-eoo & eo2 (All Models) BCT-820E & 822E Explosion Proof {All Models) GENERAL CAUTION: Models BCT-800 and 802 are not for use in hazardous environments as described in National Electrical Code. Failure to comply can result in explosion or fire. NOTICE: Type BCT controls are designed for temperature control service only. Because they do not fail safe, they should not be used for temperature limiting duty. CAUTION: Users should install adequate controls and safety devices with their electric heating equipment. Where consequences of failure may be severe, back-up controls are essential. Although the safety of the installation is the responsibility of the user, Chromalox will be glad to make equipment recommendations. Model BCT is an indicating temperature controller designed to control heating and/or cooling systems. They are supplied with either one or two 3-wire, single-pole, double-throw switch(es) of the snap-acting type. The control is actuated by an oil filled thermal-sensing element except for 9BS models which are mercury filled. All are field replaceable and interchangeable with other elements of the same range as indicated in Table A. NOTE: It is not recommended to switch systems directly from heating to cooling and vice versa. Power Supply — WARNING: Use on AC only. Thermostat is not DC rated. Packing Glands — If a sealed or leak-proof connection is required at the point where the capillary enters the oven, tank, pipe or similar equipment, an appropriate packing gland is available as an optional part. (Catalog Numbers V42-25A, V42-25D or V42-25E) Principle of Operations — Temperature variations are sensed by the liquid-filled bulb which hydraulically transmits motion through a bellows lo a rack-pinion mechanism which rotates the indicating pointer and actuates the precision snap-acting switch(es). Controller settings are made by turning the adjustment knobs causing the cams lo reposition the precision snap switch(es) in relation lo the thermal sensing system. 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 Avoiding excess heating capacity (oversized heaters). 2. Locating control sensing bulb in optimum position between heat source and work. In general, it is difficult to predict the actual operating differential of a given process. Temperature differential may be as low as 2°F for low range controls to as high as 10 °F for higher range controls since the differential is a percentage function of the dial range. Specification — Table B Storage Temperature: Ambient Temperature -65 to + 160°F. Electrical Rating: Enclosure: 15 amp 125/250/430 VAC resistive Limits: -40 to + 160°F. Set point typically shifts 8CT-800, 002, Lexan, black Finish. less than 1 % of range for a 50°F <28°C) BCT-B20E, 822E Die cast aluminum (max 0.4% copper), light ambient temperature change. Explosion proof) grey aluminum lacquer finish, gasketed. Shock: Set point repeats after 15 G, 10 millisecond duration, Faceplate: Weight: Clear Lexan* Vibration: Set point repeats after 2.5 G, 5-500 CPS. BCT-800, 802 Approx. 3 lbs. 4 oz. Enclosure Classification: BCT-820E, 822E Approx. 7 lbs. BCT-800, 002, NEMA 1. Explosion proof} BCT-820E, 622E NEMA 4, 7, 9 Electrical Connection: Explosion Proofl BCT 800, Q02 (2) ...
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