Kbogacik: Created page with "{| |width="33%"| '''Shop Area:''' Metal Shop '''Tool:''' Ovens and Kilns '''Requires in-person training:''' Yes |width="33%"| '''Procedure Number''' MT 130-08, Rev. 1 |w..."

2021-03-04T14:42:06Z

Created page with "{| |width="33%"| '''Shop Area:''' Metal Shop '''Tool:''' Ovens and Kilns '''Requires in-person training:''' Yes |width="33%"| '''Procedure Number''' MT 130-08, Rev. 1 |w..."

New page

{|
|width="33%"|
'''Shop Area:''' Metal Shop

'''Tool:''' Ovens and Kilns

'''Requires in-person training:''' Yes
|width="33%"|
'''Procedure Number'''

MT 130-08, Rev. 1
|width="33%"|
'''Date'''

3/04/2021
|}

= General =
== KH 418 Evenheat Kiln ==
Chamber Dimensions: 18" Deep x 6.5" Wide x 4.25" High
Max Temperature: 2200°F

Heat Treat Oven – Kiln (Evenheat) for the heat treating of metals for knife making, gunsmithing, automotive and general machine shop work.

Evenheat Knife/Heat Treat Ovens are a controlled heat source designed for the sole purpose of heat treating metals

[[File:Heat Treat Oven.png]]

= Reference =
* KH 418 Manual (https://a9843d05-6c8c-4a08-9cea-92539c11e7e9.filesusr.com/ugd/3a9418_7aa08ef009c542e48e4d68c5958e86bb.pdf)
* KH 418 Control Interface Manual (https://a9843d05-6c8c-4a08-9cea-92539c11e7e9.filesusr.com/ugd/3a9418_1b2e140c52df4b2cbb9c5b7fdcc93439.pdf)

= Maintenance =
'''Thermocouple:'''
* The thermocouple is a temperature sensor.
* Located in the ceiling of the oven.
* Standard thermocouple is known as a Type K. The term “Type K” refers to the type of alloys used to manufacture the thermocouple.
* Thermocouple needs no maintenance other than replacement if it fails. Failure of the thermocouple is seen as an error message on the controls.
* The thermocouple must be replaced with another Type K thermocouple.
* To replace the thermocouple first unplug the oven and allow it to return to room temperature.
* The thermocouple is part of an assembly is located in the ceiling of the oven.
* Remove the 2 screws that fasten the assembly to the oven and pull it from the oven.
* Loosen the 2 screws that fasten the thermocouple to the oval shaped block and remove the thermocouple.
* Attach the replacement thermocouple to the oval shaped block with the red thermocouple lead to the red thermocouple lead wire.
* Tighten the screws.

'''Control Relay Replacement via the Relay Access Port:'''
* The oven uses a device called a relay (a.k.a. contactor) to control power to the heating element.
* During use the relay continually turns on and off to maintain the proper kiln temperature.
* The relay is a service part and is likely to need replacing at some point.
* To replace the relay use the external, relay access port.
* The relay access port allows relay replacement by removing the access plate located on the outside of the kiln control enclosure

[[File:Heat Treat Oven Replace Relay.png]]

'''Fire Brick:'''
* The insulating fire brick while strong, can be damaged with rough handling.
* Damage that is small or minor may be ignored.
* Any brick damage that affects performance should be repaired or replaced, such as brick that holds the heating elements in place.

'''Control Fuse:'''
* The electronic controls are protected with a control fuse located in a fuseholder on the backside of the oven control panel.
* The fuse is rated at 250V/250mA, slo-blo.
* If replacement is necessary, replace only with a fuse of the same rating.

'''Cleaning:'''
* Period vacuuming of the oven chamber removes debris that may damage the heating elements.
* A gentle vacuuming with a soft brush is perfect.
* Pay particular attention to the element grooves.
* Unplug the oven before vacuuming.
* The oven jacket is Stainless Steel and requires no real maintenance or cleaning.
* The oven control panel requires no cleaning.

= Specifications =

[[File:Heat Treat Electrical Table.png]]

'''END OF THE PROCEDURE'''

Ovens and kilns maintenance and specifications - Revision history

Kbogacik: Created page with "{| |width="33%"| '''Shop Area:''' Metal Shop '''Tool:''' Ovens and Kilns '''Requires in-person training:''' Yes |width="33%"| '''Procedure Number''' MT 130-08, Rev. 1 |w..."