Assessments - 3, GPA: 3.3
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Typ. Capillary2 / "21324 / "3322 / "932DialStopPostConnect LoadHereShaft ShownIn "Off" Position(Without Calibrated Cap) Connect PowerSupply Here/ "1116Calibration CapWhite NylonUniversal CouplerSet Screw LockFigure 1 Sensing Bulb Temperature Approx. Capillary Max. Range Dia. Length Length A.C. Rating Model (°F) Style (In.) (In.) (Ft.) (Amps) AR-115EP 7 AR-115AEP 0 – 100 5 0.375 43/8 2 AR-115CEP 12 AR-214EP 7 30 Amp AR-214DEP 4 0.250 55/32 15 120-277 VAC AR-215EP 60 – 250 7 AR-215AEP 5 0.375 4 2 AR-219EP 7 AR219DEP 9 0.188 103/4 15 250 VA AR-514EP 4 0.250 55/8 7 120-277 VAC AR-515EP 7 (Pilot Duty) AR-515AEP 200 – 550 5 0.375 35/8 2 AR-519EP 9 0.188 9 7 AR-519DEP 15 AR-715EP 5 0.375 311/16 7 AR-715DEP 300 – 700 5 0.375 15 AR-719EP 9 0.188 12 7 61/2” 81/4” 41/4” 4” (Supersedes PK413-3)PK413-4AR161-562791-001SEPTEMBER, 19954andInstallation,OperationRENEWALPARTSIDENTIFICATIONType AR-EP Industrial Explosion-Resistant Thermostat © 2010 Chromalox, Inc. Specifications – Table A 2 / "1732Length(Refer to Specifications — Table A)2" O.D. Typ. Capillary2 / "21324 / "3322 / "932DialStopPostConnect LoadHereShaft ShownIn "Off" Position(Without Calibrated Cap) Connect PowerSupply Here/ "1116Calibration CapWhite NylonUniversal CouplerSet Screw LockFigure 1 Sensing Bulb Temperature Approx. Capillary Max. Range Dia. Length Length A.C. Rating Model (°F) Style (In.) (In.) (Ft.) (Amps) AR-115EP 7 AR-115AEP 0 – 100 5 0.375 43/8 2 AR-115CEP 12 AR-214EP 7 30 Amp AR-214DEP 4 0.250 55/32 15 120-277 VAC AR-215EP 60 – 250 7 AR-215AEP 5 0.375 4 2 AR-219EP 7 AR219DEP 9 0.188 103/4 15 250 VA AR-514EP 4 0.250 55/8 7 120-277 VAC AR-515EP 7 (Pilot Duty) AR-515AEP 200 – 550 5 0.375 35/8 2 AR-519EP 9 0.188 9 7 AR-519DEP 15 AR-715EP 5 0.375 311/16 7 AR-715DEP 300 – 700 5 0.375 15 AR-719EP 9 0.188 12 7 61/2” 81/4” 41/4” 4” GENERAL NOTICE: Type AR-EP controls are designed for temperature control service only. Because they do not fail safe, they should not be used for temperature limiting duty. WARNING: Users should install adequate back-up controls and safety devices with their electric heating equipment. Where the 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. Principle of Operation — Control action of these thermostats is provided through the principle of liquid volume change. With a variation in temperature, the liquid in the sensing bulb expands or contracts, causing a bellows to actuate the switching mechanism. Housing — The control housing and cover assembly is of heavy- duty cast aluminum. Control Range — The following temperature ranges are available: Fahrenheit 0° to 100° 200° to 550° 60° to 250° 300° to 700° 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 section.) 2. Avoiding excess heating capacity (oversized heaters). 3. 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 4°F for low range controls to as high as 17°F for higher range controls since the differential is a percentage function of the dial range. 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. (Model CCF-25A, CCF-25D or CCF-25E) MOUNTING Note: Do not mount thermostat where it will be subject to vibration, shock, grease, dust, lint or corrosive vapors. 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... never above 150°F. 1. Thermostat must be mounted in a vertical position only. 2. Use sheet metal or wood screws through the two 5/16” diameter mounting holes in mounting lugs to mount control (see Figure 2). 3. For controlling platen or die temperatures, insert entire sensing bulb into drilled holes selected for snug slip fit. The longer, more sensitive Style 9 bulbs should be used for controlling air temperatures or pipe line heating. 4. NOTICE: A. Bending or deforming sensing bulb will alter control calibration — MountingLugsCapillarySealFitting3" 7 / "38Figure 2 requiring recalibration after installation. See CALIBRATION section, page 3. If necessary, Style 9 bulbs can be coiled to 1” I.D. (see Figure 3). B. Do not kink capillary tube. The resulting constrictions in fluid flow can destroy control function or broaden temperatur...