2
Table of Contents
Safety Information ................................................................................................................................3
Alert Boxes ............................................................................................................................................3
Warnings ................................................................................................................................................4
Introduction ............................................................................................................................................5
Intended Use......................................................................................................................................5
General Usage ..................................................................................................................................5
Principles of Operation ......................................................................................................................5
General Specifications for Furnaces......................................................................................................8
Environmental Conditions..................................................................................................................8
Declaration of Conformity ......................................................................................................................9
Unpacking ............................................................................................................................................10
Installation ............................................................................................................................................11
Operation of Manual and Automatic Models........................................................................................12
Manual Control Models (F21124, F21125, F21120) ............................................................................12
Pyrometer ........................................................................................................................................12
Single Set Point Temperature Control (Automatic) (F21130, F21130-33, F21135)..............................13
Adjustment of Parameters (See Figure 1) ......................................................................................13
Furnace Loading ..................................................................................................................................16
Preventive Maintenance ......................................................................................................................17
General Cleaning Instructions..........................................................................................................17
Troubleshooting....................................................................................................................................18
Maintenance and Servicing ..................................................................................................................21
To Replace Vestibule End Caps......................................................................................................21
To Replace The Heating Element Tube (Without Case Assembly) ................................................21
To Replace Control Base ................................................................................................................22
To Replace Pyrometer (Manual Control Models) ............................................................................22
To Replace Manual Temperature Control Switch ............................................................................23
To Replace Furnace Chamber ........................................................................................................24
To Replace Type K (Chromel/Alumel) Thermocouple (Manual Control Models) ............................24
To Replace Type Platinel II Thermocouple (Single Set Point Control Models) ..............................25
Replacement Parts List........................................................................................................................26
Ordering Procedures............................................................................................................................27
Wiring Diagrams ..................................................................................................................................28
Warranty ..............................................................................................................................................30
Table Of Contents