Chromalox®

Installation

and

RENEWAL PARTS IDENTIFICATION

SERVICE REFERENCE

DIVISION 4

 

SECTION NWHO

SALES

(Supersedes PE437)

PE437-1

REFERENCE

 

 

 

161-303184-001

DATE APRIL, 1999

Type NWHO(F)-27 Series Circulation Heater

(for Regular and Fuel Oil Heating)

Thermostat (When Specified)

Specifications — Table A

Regular Oil Heaters

3 - 1-3/8" K.O. for 1" Conduit

3" Pipe

Outlet (Std.)

2 Mtg. Lugs Ea with Three 3/4" - 10 x1-1/8" Deep Holes on 1-3/4" Centers

3" Pipe Inlet (Std.)

15-15/16"

A

CB

A

11"

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

3/4" NPT

 

 

 

 

 

 

 

 

 

 

 

 

 

Pipe Plug

 

 

 

 

 

 

 

 

 

 

17-1/8"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimensions (In.)

 

 

 

 

 

 

 

 

 

 

Model

Volts

Phase

kW

W/In2

A

B

 

C

NWHO-2780R15

240 or 480

3

80

20

77-9/16

52

 

48-1/2

NWHO-2790R15

240 or 480

3

90

20

81-9/16

56

 

52-1/2

NWHO-27100R15

240 or 480

3

100

20

87-9/16

62

 

58-1/2

NWHO-27120R15

240 or 480

3

120

20

97-9/16

72

 

68-1/2

 

 

 

 

 

 

 

 

 

 

 

Fuel Oil

Heaters

 

 

 

 

 

NWHO-2750R15

240 or 480

3

50

12

77-9/16

52

 

48-1/2

NWHO-2760R15

240 or 480

3

60

12

87-9/16

62

 

58-1/2

NWHO-2770R15

240 or 480

3

70

12

97-9/16

72

 

68-1/2

Dimensions and ratings vary according to customer requirements.

Check engineering drawing for specifications.

F-Denotes heater is baffled, i.e., NWH0F

GENERAL

WARNING: This heater is not intended for use in haz- ardous atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in explosion or fire.

Hazardous area terminal enclosures are available, consult your local Chromalox representative for details.

The NWHO-27 series is a general-purpose oil circulation heater intended for use indoors.

The 27 or 36 steel sheathed tubular elements are welded to a remov- able steel flange and centered in a 10 inch diameter steel heating chamber.

Depending upon the specifications, the NWHO-27 may or may not be factory equipped with AR or other Chromalox thermostats. Such ther- mostats function to control outlet temperatures and limits internal tem- perature under abnormal flow conditions. These controls do not fail-safe. Thermocouples are also available as an option.

CAUTION: Users should install adequate back-up con- trols 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 installation is the responsibility of the user, Chromalox will be glad to make equipment recom- mendations.

INSTALLATION

WARNING: Hazard of Shock. Disconnect all power before installing heater.

1.Vertical mounting (axis of chamber vertical as in sketch above) is preferred. (Terminal housing at top of heater) (Figure A)

2.When mounting heater horizontally, inlet and outlet MUST be up. In any other position, heater cannot be purged of air and elements may be seriously damaged. (Figure B)

3.This series of circulation heaters are provided with mounting lugs to support the heater chamber. Refer to sketch above for location of these mounting lugs.

4.Mount heaters to permit unrestrained expansion of chamber due to temperature. This can be accomplished by using a slotted mount-

ing assembly on either of the lugs.

5.DANGER: Hazard of Fire. Provide minimum of 6” spacing from a chamber and related piping to nearest combustible materi- al. Avoid operation of heater near combustible fluids or in com- bustible vapor or gas laden atmosphere.

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

7.If two or more heaters are needed to provide the needed heating capacity, arrange them for series oil flow.

8.DANGER: Possible Explosion. A pressure relief valve should be provided by customer at outlet of vessel. There should be no other valving between vessel and valve.

Correct

Incorrect

CorrectIncorrect

Figure A — Vertical Mounting

Figure B — Horizontal Mounting

© 2010 Chromalox, Inc.

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Chromalox NWHO(F)-27 specifications General, Installation, Specifications Table a, Regular Oil Heaters, Model

NWHO(F)-27 specifications

The Chromalox NWHO(F)-27 is a state-of-the-art industrial heating solution that offers exceptional performance in various applications. Designed for versatility and efficiency, this product is ideal for processes requiring precise temperature control and uniform heating. With its robust construction and innovative technology, the NWHO(F)-27 has gained reputation in industries such as chemical processing, food production, and pharmaceuticals.

One of the most significant features of the NWHO(F)-27 is its advanced heating technology. The unit utilizes a high-quality heating element that ensures consistent and reliable temperature output. This technology minimizes hot spots and ensures even heat distribution across the entire surface area, which is crucial for processes that demand precise thermal management. The integration of advanced thermal sensors also enables real-time monitoring and automated adjustments, enhancing energy efficiency and reducing operational costs.

The NWHO(F)-27 is designed with user-friendly controls that allow operators to set and adjust temperature parameters easily. Its intuitive digital interface ensures that users can monitor temperature, system status, and other essential metrics at a glance. This aspect of the design is particularly beneficial in settings where quick adjustments are necessary to maintain process integrity.

Durability is another key characteristic of the Chromalox NWHO(F)-27. Constructed from high-strength materials, this heating unit is built to withstand harsh operating environments. It is resistant to corrosion and capable of withstanding high temperatures, ensuring long-lasting performance and reliability. The unit's compact design also makes it easy to integrate into existing systems without requiring significant modifications.

Energy efficiency is a priority in the design of the NWHO(F)-27. With its innovative heating technology, the unit significantly reduces energy consumption compared to conventional heating systems. This not only lowers operational costs but also minimizes the environmental impact, making it an excellent choice for companies striving for sustainability.

In summary, the Chromalox NWHO(F)-27 stands out for its advanced heating technology, user-friendly controls, durability, and energy efficiency. Whether for industrial applications or specialized processes, this heating solution provides the reliability and performance needed to meet the demands of modern production environments. Its thoughtful engineering and robust design make it an asset for companies seeking to enhance their heating capabilities while maintaining high standards of quality and efficiency.