WIRING

ELECTRIC SHOCK HAZARD. Disconect all power to heater 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.

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 ther- mostat cover (see Figure 7).

6.Connect wires according to wiring diagrams (Figures 8 thru 12). Note: Electrical connections should be made with gener- ous loops of wire — approximately 6” per lead.

7.Replace cover, tighten screws, replace dial knob and dial knob cover.

8.Note: If load amperage or voltage rating exceeds switch rating, a contactor must be used. Contactor and wiring to be supplied by customer.

Figure 5

Figure 6

Figure 7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

 

L1

 

Pilot Light

L2

L3

 

 

(Optional)

 

 

Figure 8 — Three-Phase “Y” Load

5

6

1

2

3

4

L1

Pilot Light

L2

L3

 

(Optional)

 

 

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

Thermometer

Load (Tank, vat, die or platen)

Figure 11

Figure 12

ELECTRIC SHOCK HAZARD. Disconnect all power before attempting to calibrate thermostat. Failure to comply could result in personal injury.

These controls are factory calibrated to the range indicated on the control adjustment knob.

If calibration is required, either one of two methods may be followed.

1.If accurate measurement standards are not available, the ther- mostat can readily be adjusted to a known temperature stan- dard such as boiling water (212°F) (see Figure 10).

2.With the aid of an accurate thermometer or other temperature measuring device, recalibration may be performed within the process as in Figure 11.

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Chromalox PK407-3, PK407-4 specifications Wiring, Calibration
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PK407-3, PK407-4 specifications

The Chromalox PK407-4 and PK407-3 are advanced electric heating solutions designed to enhance efficiency and performance in various industrial applications. These units are exemplary in terms of design and functionality, making them essential for temperature control within diverse environments.

One of the main features of the PK407 series is its robust construction, featuring high-quality materials that ensure durability and longevity. The units are designed to withstand demanding conditions while maintaining optimal performance. This makes them suitable for applications in areas such as food processing, chemical manufacturing, and other industrial processes requiring precise temperature regulation.

Both models in the PK407 series incorporate innovative heating technologies, including advanced thermal insulation, which maximizes energy efficiency by reducing heat loss. This results in lower operational costs and enhanced productivity, as these units can achieve desired temperature levels more quickly and maintain them with minimal energy consumption.

Another characteristic of the PK407-4 and PK407-3 is their user-friendly interface. The control systems are designed for ease of operation, enabling users to set and adjust temperatures with precision. This feature is particularly beneficial in processes that require stringent temperature controls, ensuring product quality and consistency.

The PK407 series is equipped with built-in safety mechanisms, which include over-temperature protection and automatic shut-off features. These safety measures help prevent overheating and ensure the safety of operators and surrounding equipment. Furthermore, the units comply with industry standards, giving users confidence in their reliability and safety.

In addition, the versatility of the PK407-4 and PK407-3 allows them to be integrated seamlessly into existing systems, providing flexibility for retrofitting or new installations. Their compact design is advantageous for facilities with limited space, enabling easy placement without compromising performance.

With their combination of robust construction, energy efficiency, user-friendly controls, and advanced safety features, the Chromalox PK407-4 and PK407-3 are excellent choices for businesses seeking effective electric heating solutions. These units not only meet the demands of various industries but also contribute to improved operational performance and reliability. Investing in the PK407 series will undoubtedly enhance process efficiency and productivity in any industrial setting.
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