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Figure 3 (Sensing Bulb) Figure 4 (Capillary Tube) 1” 1/2” Rod Do Not Bend or Kink Crimped End D. Avoid passing control capillary tube through zones whose temperature is in excess of controlled process temperature. Erratic control or destruction of control function may result. WIRING 6. Connect wires according to wiring diagrams (Figures 8 thru 12). Note: Electrical connections should be made with gener- ELECTRIC SHOCK HAZARD. Disconect all power to ous loops of wire — approximately 6” per lead. heater before installing or servicing thermostat. 7. Replace cover, tighten screws, replace dial knob and dial knob Failure to do so could result in personal injury or cover. property damage. Thermostat must be installed by a 8. Note: If load amperage or voltage rating exceeds switch rating, qualified person in accordance with the National a contactor must be used. Contactor and wiring to be supplied Electrical Code, NFPA 70. by customer. 1. Electric wiring to heater must be installed in accordance with local and National Electrical Codes. CAUTION: Use copper conductors only. 2. Entrance for wiring is provided by two 1/2” conduit holes in end of base plate. 3. If control is a “KC” model (Knob Cover), remove knob cover as in Figure 5. 4. Set thermostat knob to OFF position and then remove knob by lifting knob from shaft. (See Figure 6) 5. Loosen two screws from end of base plate and remove thermostat cover (see Figure 7). Figure 5 Figure 6 Figure 7 Figure 8 — Three-Phase “Y” Load Figure 9 — Three-Phase Delta Load Note: One line (terminals 5-6) is controlled by the dial and is on continually whenever the dial is moved from the off position. The other two lines are thermostatically controlled and cycle with the rise or fall in temperature. CALIBRATION Figure 10 Figure 11 Figure 12 If calibration is required, either one of two methods may be followed. ELECTRIC SHOCK HAZARD. Disconnect all power 1. If accurate measurement standards are not available, the therbefore attempting to calibrate thermostat. Failure mostat can readily be adjusted to a known temperature stanto comply could result in personal injury. dard such as boiling water (212°F) (see Figure 10). 2. With the aid of an accurate thermometer or other temperature These controls are factory calibrated to the range indicated on measuring device, recalibration may be performed within the the control adjustment knob. process as in Figure 11. CALIBRATION (cont’d.) For either method the following general calibration procedures should be followed. 1. Remove knob cover, knob and thermostat housing as per instructions 3, 4 and 5 under WIRING. 2. Replace knob and turn to highest temperature setting. 3. Slowly turn knob and when controls click “off”, compare the dial reading against the thermometer reading. 4. If they do not agree — A. Set dial knob to thermometer temperature reading and pull off knob. B. While holding the adjusting shaft (B) tightly, turn small center adjusting screw (A) with small screwdriver (C) until thermostat “clicks” (see Figure 12). Note: Always use extreme care not to damage the slot in the center adjusting screw. C. Each quarter turn of the screw will change the calibration approximately 30°F: — Clockwise to decrease temperature. — Counterclockwise to increase temperature. D. Recheck calibration and repeat process if closer calibration is required. RENEWAL PARTS IDENTIFICATION 027-057548-00Mounting Brack119-114623-003152-025660-004Housing Model 1 Thermostat Sub-Assembly 4 Dial Knob 2 Thermostat Cover 3 Base AR-2153 300-047848-002 169-019604-001 080-024763-001 015-013819-001 AR-2153P 300-047848-002 169-019604-001 080-026032-007 015-013819-001 AR-2193 300-047848-001 169-019604-001 080-024763-001 015-013819-001 AR-2193P 300-047848-001 169-019604-001 080-026032-007 015-013819-001 AR-5153 300-047848-004 169-019604-002 080-024763-001 015-013819-001 AR-5153P 300-047848-004 169-019604-002 080-026032-007 015-013819-001 AR-5193 300-047848-003 169-019604-002 080-024763-001 015-013819-001 AR-5193P 300-047848-003 169-019604-002 080-026032-007 015-013819-001 Limited Warranty: Please refer to the Chromalox limited warranty applicable to this product at 1347 HEIL QUAKER BLVD., LAVERGNE, TN 37086Phone: (615) 793-3900 ...
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