VERDER CARBOLITE GERO RHF 14/8 Handbuch

Installation, Operation and Maintenance Instructions

1400 °C Rapid Heating Furnace - RHF Model: 8 Litres

No Controller

RHF 14/8 + No Controller

MEN-RHF1408-005_NOCTRL (29-10-2021)

Contents

This manual is for guidance on the use of the Carbolite Gero product specified on the

front cover. This manual should be read thoroughly before unpacking and using the

furnace or oven. The model details and serial number are shown on the back of this

manual. Use the product for the purpose for which it is intended.

1.0 Symbols and Warnings 4

1.1 Switches and Lights 4

1.2 General Warnings 4

1.3 Prerequisites to Use 5

2.0 Installation 6

2.1 Unpacking and Handling 6

2.2 Siting and Setting Up 6

2.3 Chimney 7

2.4 Heating Elements 8

2.5 Electrical Connections 8

Technical Notes 9

3.0 Temperature Controller 10

4.0 Operation 11

4.1 Operating Cycle 11

4.2 General Operating Notes 11

4.3 Use of Probes and Metal Sheathed Thermocouples 12

4.4 Atmospheres 12

4.5 Heating Elements 12

4.6 SiliconCarbide Protection Tiles Option 12

4.7 Operator Safety 13

5.0 Maintenance 14

5.1 General Maintenance 14

5.2 Maintenance Schedule 14

5.2.1 Cleaning 16

5.3 Safety Switch 16

5.4 Calibration 16

5.5 After-Sales Service 17

5.6 Recommended Spare Parts and Spare Parts Kit 17

5.7 Element Ageing 17

5.8 Power Adjustment 18

6.0 Repairs and Replacements 19

6.1 Safety Warning - Disconnection from Power Supply 19

6.2 Safety Warning - Refractory Fibre Insulation 19

6.3 Temperature Controller Replacement 19

6.4 Solid-State Relay Replacement 20

6.5 Fuse Replacement 20

6.6 Thermocouple Replacement 20

6.7 Element Fitting and Replacement 21

7.0 Fault Analysis 25

A. Furnace Does Not Heat Up 25

B. Product Overheats 26

8.0 Wiring Diagrams 27

8.1 WA-12-30 27

8.2 WA-12-31 28

8.3 WA-22-30 29

8.4 WA-22-31 30

9.0 Fuses and Power Settings 31

9.1 Fuses 31

9.2 Power Settings 31

User Power Setting Adjustments 32

10.0 Specifications 33

10.1 Environment 33

1.0 Symbols and Warnings

1.1 Switches and Lights

Instrument switch: when the instrument switch is operated the

temperature control circuit is energised.

Heat light: the adjacent light glows or flashes to indicate that

power is being supplied to the elements.

1.2 General Warnings

DANGER – Electric shock. Read any warning printed next to this

symbol.

WARNING: Risk of fatal injury.

DANGER – Hot surface. Read any warning printed next to this

symbol.

WARNING: All surfaces of a product may be hot.

DANGER – Read any warning printed next to this symbol.

Caution – Double Pole/Neutral Fusing

1.3 Prerequisites to Use

Prior to the commissioning and use of this product, all personnel involved in its

installation, operation and maintenance must be deemed competent and have:

lRead and understood the information contained within this manual

lReceived the relevant training with regard to safety and operation of the product

lBeen provided with the appropriate PPE (Personal Protective Equipment) required

for the safe operation of this product

Note: The customer is responsible for ensuring that all of the above conditions are

satisfied before the product is commissioned for use.

Note: Unless otherwise specified, the customer is responsible for the

installation of this product and the safe connection of any additional

equipment and gas or liquid supply lines.

2.0 Installation

2.1 Unpacking and Handling

When unpacking and handling the product, always lift it by its base. Do not use the

door or any other projecting cover or component to support the equipment when

moving it. Use two or more people to carry the product where possible.

Carefully remove any packing material from inside and around the product before use.

Avoid damaging the surrounding insulation when removing packing materials.

NOTE: This product contains Refractory Ceramic Fibre (also known

as Alumino Silicate Wool - ASW). For precautions and advice on

handling this material see section 6.2.

2.2 Siting and Setting Up

Place the product on a level surface in a well ventilated area.

Site away from other sources of heat and on a non-flammable surface that is resistant

to accidental spillage or hot materials.

The surface on which the equipment is mounted should be stable and not subject to

movement or vibrations.

The height of the mounting surface is important to avoid operator strain when loading

and unloading samples.

Unless otherwise stated elsewhere in this manual, ensure that there is at least 150

mm of free space around the back and sides of the product. Clear space is required

above the product to dissipate heat.

Depending on the application of the product, it may be appropriate to position it under

an extraction hood. Ensure the extraction hood is switched on during use.

Ensure that the product is placed in such a way that it can be quickly switched off or

disconnected from the electrical supply.

Under no circumstances should any objects be placed on top of the

product. Always ensure that any vents on the top of the product are clear

of any obstruction. Always ensure all cooling vents and cooling fans (if

fitted) are clear of any obstruction.

2.3 Chimney

The chimney is a length of tubing. If it is supplied unfitted, then fit it through the hole

in the top of the case.

If the product is to be used to heat substances that emit fumes, a fume extraction duct

of approximately 75 mm - 150 mm inlet diameter may be placed directly above the

chimney outlet.

Do not make a sealed connection to the product chimney as this causes excessive

airflow through the chamber and results in poor temperature uniformity.

Key

A Duct (75mm-150mm diameter)

B Ambient air is drawn into duct

C Chimney

D 25mm vertical gap between chimney and duct

2.4 Heating Elements

The silicon carbide elements are VERY FRAGILE and are packed separately. Fit them

accordingly to the instructions in section 6.0 for element fitting and replacement

instructions.

2.5 Electrical Connections

Connection by a qualified electrician is recommended.

The product covered by this manual normally requires a single phase A.C. supply,

which may be Live to Neutral non-reversible, Live to Neutral reversible or Live to Live.

Some models may be ordered for 3-phase use, which may be with or without neutral.

Check the product rating label before connection. The supply voltage should agree with

the voltage on the label and the supply capacity should be sufficient for the current on

the label.

The supply should be fused at the next size equal to, or higher than the current on the

label. This manual contains a table of the most common fuse ratings.

When the mains cable is factory fitted, internal fuses are also fitted. It is essential that

the operator ensures that the product is correctly fused.

Products with a factory fitted supply cable are designed to be wired directly to an

isolator or fitted with a line plug.

Products without a factory fitted supply cable require a permanent connection to a

fused and isolated supply. The product's electrical access panel should be temporarily

removed, and connections made to the internal terminals.

When connecting the product to the power supply, the plug or isolating switch should

be accessible, easy to remove, and within reach of the operator.

The supply MUST incorporate an earth (ground).

Supply Terminal Label Cable Colour

Supply Types

Live - Neutral Reversible or Live-

Live

1-phase L1 Brown to live

to either power

conductor

(For USA 200-240V,

connect L1)

N / L2 Blue to neutral

to the other power

conductor

(For USA 200-240V,

connect L2)

PE Green/ Yellow to earth

(ground) to earth (ground)

Electrical Connection Details:

3-phase L1 Black to phase 1

L2 Black to phase 2

L3 Black to phase 3

N Light Blue to neutral (if fitted)

PE Green/ Yellow to earth (ground)

DO NOT connect a product ordered for three phase use to a single

phase supply or to the wrong type of three phase supply.

Technical Notes

This model has an electronically controlled power limit. Do not attempt to calculate the

Amps from the Wattage. High break capacity fuses should be used. Avoid fast-blow

fuses and magnetic trip circuit breakers - consult Carbolite Gero if in doubt.

Two-phase models use two phases out of a 3-phase + neutral supply. One phase is

unused. The neutral current is equal to the current in one of the used phases.

3.0 Temperature Controller

If this product is fitted with a temperature controller, instructions are provided

separately.

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