VERDER CARBOLITE GERO CF 24B Handbuch

Installation, Operation and Maintenance Instructions

1200°C Cupellation Furnace - CF Model: 24B

No Controller

CF 24B + No Controller

MEN-CF24B-005_NOCTRL (10-07-2020)

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 5

1.1 Switches and Lights 5

1.2 General Warnings 5

2.0 Installation 6

2.1 Unpacking & Handling 6

2.2 Door Counterbalance 6

2.3 Siting and Setting Up 7

2.4 Split Model CF24 8

2.5 Heating Elements 8

2.6 Baffle 8

2.7 Electrical Connections 8

3.0 Temperature Controller 11

4.0 2132 Over-Temperature Controller Description (if fitted) 12

4.1 Description 12

4.2 Operation 12

4.2.1 Controls 12

4.2.2 Operation 13

4.2.3 Over-Temperature Operation 13

4.2.4 Over-Temperature Alarm 13

4.2.5 Resetting the Over-Temperature Alarm 13

4.2.6 Sensor Break 13

4.3 Audible Alarm 14

4.4 Navigation Diagram 14

5.0 Time Switch 15

5.1 Digital Time Switch - Theben TR 635 top2 15

Important Note 16

Reset 16

Setting the Time and Date (and Daylight Saving Rules) 16

Setting a Switch-On or Switch-Off Time 16

Modifying or deleting a Switch-On or Switch-Off Time 16

Overriding the Program 17

Pulse and Cycle 17

6.0 Operation 18

6.1 Operating Cycle 18

6.2 Instrument Layout 19

6.3 General Operating Advice 19

6.4 Operator Safety 20

6.5 Over-Temperature Control (if fitted) 20

7.0 Maintenance 21

7.1 General Maintenance 21

7.2 Maintenance Schedule 21

7.2.1 Cleaning 23

7.3 Safety Switch 23

7.4 Calibration 23

7.5 After-Sales Service 24

7.6 Recommended Spare Parts and Spare Parts Kit 24

7.7 Element Ageing 24

7.8 Power Adjustment 25

8.0 Repairs and Replacements 26

8.1 Safety Warning - Disconnection from Power Supply 26

8.2 Safety Warning - Refractory Fibre Insulation 26

8.3 Temperature Controller Replacement 26

8.4 Solid-State Relay Replacement 27

8.5 Element Fitting and Replacement 28

8.6 Thermocouple Replacement 29

8.7 Fuse Replacement 29

9.0 Fault Analysis 30

A. Furnace Does Not Heat Up 30

B. Product Overheats 31

10.0 Wiring Diagrams 32

10.1 WA-33-32 32

10.2 WA-33-33 33

10.3 WS-01-01 34

10.4 WS-01-02 34

11.0 Fuses and Power Settings 35

11.1 Fuses 35

11.2 Power Settings 35

User Power Setting Adjustments 36

12.0 Specifications 37

12.1 Environment 37

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

2.0 Installation

2.1 Unpacking & Handling

When unpacking or moving the product, always lift by its base; do not use the door or

any other projecting cover or component to support the equipment when moving it. Use

a fork lift or pallet truck to move the product; position the product on a level surface and

use an adequate number of personnel to safely move the product into position.

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 8.2.

2.2 Door Counterbalance

Door counterbalance are used as handles to open and close the door. These may be

supplied unfitted. If supplied unfitted two grub screws and two door counterbalances

should be present. Place the counterbalance into the door shaft as shown in the image

below. Fasten the grub screw into the end of the shaft and tighten using an M8 allen

key.

2.3 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.

2.4 Split Model CF24

When transported as two components, connect them as follows. Remove the side

panels from the top and the left-hand side from the base. Remove the four fixing bolts

from the top of the base. Place the top onto the base, with the door above the control

panel and bolt the two halves together.

Connect the thermocouple comp. cables to the

appropriate terminal blocks. There are two such

cables, or three if chamber over-temperature

control is fitted. The blocks and cables are

labelled (e.g. 1, 2 , 3).

Connect the door switch wire pair to the terminal

block near the door mechanism.

Connect the power cables to the terminal blocks below the lower element holes.

Because of different power supplies and national standards, the details may differ from

the details shown, or the terminals may be in reverse order.

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.

2.5 Heating Elements

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

accordingly to the instructions in section 8.0 for element fitting and replacement

instructions.

2.6 Baffle

This product is supplied with a baffle, a refractory tile. It should be carefully placed at

the back of the furnace chamber, as shown in the image below.

2.7 Electrical Connections

Connection by a qualified electrician is recommended.

The model covered in this manual has three internal circuits and is normally supplied for

connection to a three phase power supply. This may be either star or delta, but a

product must only be connected to the type and voltage of supply for which it was

made. If the product is ordered for a single phase supply, this may be Live to Neutral

reversible or non-reversible, or Live to Live.

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:

2- or

3-phase L1 Black to phase 1

L2 Black to phase 2

L3 Black to phase 3 (except 2-phase)

N Light Blue to neutral (except delta)

PE Green/ Yellow to earth (ground)

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.

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