INSTALLATION

ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing heater. Failure to do so could result in personal injury or property damage. Heater must be installed by a qualified person in accor- dance with the National Electrical Code, NFPA 70.

1.Vertical Mounting (Preferred)

When the heater is vertically mounted, the terminal housing will be at the top of the heater. The inlet pipe will be located on the side near the bottom of the heater and the outlet pipe at the top.

The axis of the chamber will be in a vertical position as in the photo on previous page and as in Figure A. Note: A drain pipe located at the bottom of the heater should be provided and enough room left, when mounting heater, to allow draining the heater.

2.Horizontal Mounting (Optional)

CAUTION: When mounting heater horizontally, inlet and outlet pipes must be up. In any other position, heater cannot be purged of air, and elements may be seriously damaged. (See Figure B)

3. Whether vertically or horizontally, the heater should be rigidly mounted so that vibration is at a minimum since excessive vibra- tion will result in erratic thermostat operation. The NWHO(F)-18 is provided with mounting lugs to support the heating chamber. (See photo)

4.By using a slotted mounting assembly on either of the lugs, the heater chamber will be permitted to expand with increasing tem- perature.

5.Provide adequate space at terminal to end permit withdrawal of the heater from chamber should servicing be required.

FIRE HAZARD. Since heaters are capable of develop- ing high temperatures, extreme care should be taken to:

A.Provide a minimum of 6” spacing from chamber and related piping to nearest combustible material.

B.Do not operate near combustible fluids or vapors.

FREEZE HAZARD. This unit is equipped with a ther- mowell for process control or over-temperature control. Do not allow moisture to accumulate in thermowell. Freezing temperatures can cause damage that may result in the heated medium leaking into terminal enclosure.

Correct

Incorrect

Correct Incorrect

Figure A — Vertical Mounting

Figure B — Horizontal Mounting

WIRING

ELECTRIC SHOCK HAZARD. Any installation involv- ing electric heaters must be performed by a quali- fied person and must be effectively grounded in accordance with the National Electrical Code to eliminate shock hazard.

1.Be sure line voltage matches heater voltage as shown on name- plate.

2.Electric wiring to heater must be installed in accordance with local and National Electrical Codes by a qualified person as defined in the NEC.

L3

L2

Contactor L1

Contactor

Contactor

120-v OR

3.Power controllers must be used when heaters are rated for 480 volt service or if the amperage rating of the heaters exceeds the contact rating of the thermostat.

4.Refer to Wiring Diagram Table B for the proper wiring diagram for connecting heater.

Wiring Diagrams – Table B

 

240V 3–3Ø

480V 3–3Ø

Model

Fig.

Fig.

Any Heater

1

2

 

 

 

L3

L2

L1

Contactor

Contactor

Contactor

120-v OR

240-v

240-v

Figure 1 – 240V 3-3 ø Δ

Thermostat

Figure 2 – 480V 3-3 ø Δ

Thermostat

Note: Dotted lines indicate “customer furnished.” However, thermostat may be furnished by Chromalox if so specified on the order.

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Chromalox PE426-2 specifications Installation, Wiring
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PE426-2 specifications

The Chromalox PE426-2 is an advanced electric heater designed to provide efficient and reliable heating for a variety of industrial applications. Known for its robust construction and innovative features, this heater stands out in the competitive market of industrial heating solutions.

One of the defining characteristics of the Chromalox PE426-2 is its high-performance heating element, which is engineered to provide exceptional thermal efficiency. The heater utilizes a finned tubular design, allowing for greater surface area and enhanced heat transfer. This results in faster heating times and reduced energy consumption, making it an economical choice for businesses looking to optimize energy expenditures.

Another remarkable feature of the PE426-2 is its versatility. It is suitable for various applications, including process heating, comfort heating, and freeze protection, making it an ideal solution for industries ranging from food and beverage to pharmaceuticals and chemicals. The heater can be easily integrated into existing systems and can be used in both indoor and outdoor environments, thanks to its weather-resistant housing.

Durability is a key characteristic of the Chromalox PE426-2. Constructed with high-quality materials, it is designed to withstand harsh industrial conditions. Its robust casing helps to protect it from dust, moisture, and impact, ensuring a long operational lifespan with minimal maintenance requirements. Additionally, the heater is equipped with safety features such as over-temperature protection and a built-in safety thermostat, providing peace of mind for operators.

The advanced technology incorporated into the PE426-2 enhances user experience and operational efficiency. The heater features precise temperature controls, allowing for accurate heating and maintaining desired temperatures. This level of control is particularly beneficial in processes that require strict temperature regulation.

Furthermore, the Chromalox PE426-2 is designed with energy efficiency in mind, aligning with modern sustainability standards. By optimizing energy use, it not only lowers operational costs but also reduces environmental impact, making it a responsible choice for businesses committed to sustainable practices.

In summary, the Chromalox PE426-2 electric heater combines high-performance heating elements, exceptional durability, and advanced technology, making it an ideal solution for various industrial heating applications. Its versatility, precise controls, and energy efficiency make it a valuable asset for any organization aiming to enhance productivity while minimizing costs.
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