Installation, Operation & Maintenance Instructions 1200°C Split Tube furnaces types HST & VST This manual is for the guidance of oper
HST, VST Element Replacement Please see safety note 5.2 - please wear a face mask. HST, and VST with far hinge: Remove the three screws from e
HST, VST FAULT ANALYSIS A. Furnace Does Not Heat Up 1. The HEAT light is ON Æ The heating element has failed ÆCheck also that the SSR is w
HST, VST CIRCUIT DIAGRAMS Safety Switches type A: a 2-pole Heater Switch is fitted directly in the element circuit in models up to 16A rating. Tw
HST, VST 7.4 3-phase without neutral (delta) 7.5 3-phase without neutral (star – e.g. 380 to 415V) e l e me n t (s)e l e m e n t (s) Supply ligh
HST, VST 7.7 3-phase “universal” wiring Fuses F1 are always present in this wiring design. Fuses F2 could be absent in some circu
HST, VST FUSES & POWER SETTINGS 8.1 Fuses F1-F3: Refer to the circuit diagrams. F1 Internal supply fuses Fitted if supply cable fitted. Fi
9.0 MF13 – 3.31
SPECIFICATIONS Carbolite reserves the right to change specifications without notice. 9.1 Models Covered by this Manual MODEL Max. Temp. Max. Powe
HST, VST INTRODUCTION 1.1 VST & HST models The VST range comprises split tube furnaces designed for use vertically, with several mounting
HST, VST INSTALLATION 2.1 Unpacking & Handling When unpacking or moving the furnace always lift it by its case or main body. Never lift it b
HST, VST 2.4 Electrical Connections Connection by a qualified electrician is recommended. The furnaces covered by this manual normally require
HST, VST OPERATION The instructions for operating the temperature controller are given in a separate manual. If the furnace is fitted with a
HST, VST Do not set too high a heating rate. Large diameter tubes are more susceptible to thermal shock than smaller. Tubes which extend beyond t
HST, VST MAINTENANCE 4.1 General Maintenance No routine maintenance is required. The outer surfaces may be cleaned with a damp cloth. Do not all
HST, VST REPAIRS & REPLACEMENTS 5.1 Safety Warning – Disconnection from Supply Always ensure that the furnace is disconnected from the suppl
HST, VST 5.5 Thermocouple Replacement The coverings and guards which must be removed to gain access to the thermocouple depend on the model, and
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