1.Remove the bolts securing the process heater access cover.

2.Sketch the heater wiring configuration so the heaters may be re-wired properly. Heaters are mounted on a common plate of three or six for easy maintenance.

3.Remove the jumper bars and wires for the heater plate assembly(ies) being removed or replaced.

4.Remove the bolts securing the heater plate assembly and slide out the assembly. Avoid damaging the gaskets.

5.Remove individual heaters for replacement by removing the large brass nuts and washers.

6.Re-install the heaters and heater plate assemblies in reverse order, replacing gaskets if necessary.

Caution! Heater loops should not touch each other. "Hot spots" will lead to premature heater failure.

7.Re-install the jumper wires and bars according to the sketch made earlier.

8.Re-secure the process heater access cover.

Figure 19: Process Heater Box Assembly

Stainless Steel

 

 

 

Heater Housing

 

High

 

Cover

 

Temperature

Heater Elements

 

Gasket

 

Double Wall

 

 

 

 

 

 

Stainless Steel

 

 

 

Heater

 

Heater Elements

 

Housing

 

 

 

High

 

Heater Element

 

Temperature

 

Mounting Plate

 

Gasket

 

 

 

Heater Element

 

 

 

Mounting Plate

 

 

Double Wall

 

 

 

Stainless Steel

 

 

 

Heater

 

 

 

Housing

 

 

 

High

 

 

 

Temperature

 

 

Heater Assembly

Gasket

 

 

Gude Bars

 

 

Heater Assembly

Stainless Steel

 

 

Gude Bars

 

 

 

Heater Housing

 

 

 

Cover

 

 

 

Hex Nut For

Heater Element

 

 

Securing the Heater

Mounting Hex Nut

 

 

Wire

High Temperature

Heater Element

 

 

 

Washer

Washer / Gasket

 

 

Heater Wire with

 

 

 

Crimped on Closed

 

 

 

Loop Connector

 

 

 

Heater Mounting

Heater Element

Heater Assembly

 

Bulkhead Fitting

Guide Bar

 

Plate

 

 

 

Replacing the Regeneration Heater (Electric Dryers)

The regeneration heaters are wired in the delta formation, mounted in the core of the descant tanks.

DANGER! Disconnect and lock out power before heater replacement.

Large Dehumidifying Dryers

Maintenance

47

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Sterling 822.00292.00 specifications Process Heater Box Assembly, Replacing the Regeneration Heater Electric Dryers

822.00292.00 specifications

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