VERDER CARBOLITE GERO LHT 4/60 Handbuch

Installation, Operation and Maintenance Instructions

400°C Laboratory High Temperature Oven - LHT Model: 60 Litres

No Controller

LHT 4/60 + No Controller

MEN-LHT4060-006_NOCTRL (06-08-2019)

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

2.0 Installation 6

2.1 Unpacking and Handling 6

2.2 Siting and Setting Up 6

2.3 Electrical Connections 7

3.0 Temperature Controller 9

4.0 2132 Over-Temperature Controller Description (if fitted) 10

4.1 Description 10

4.2 Operation 10

4.2.1 Controls 10

4.2.2 Operation 11

4.2.3 Over-Temperature Operation 11

4.2.4 Over-Temperature Alarm 11

4.2.5 Resetting the Over-Temperature Alarm 11

4.2.6 Sensor Break 11

4.3 Audible Alarm 12

4.4 Navigation Diagram 12

5.0 Operation 13

5.1 Operating Cycle 13

5.2 Over-Temperature Control (if fitted) 13

5.3 Explosive Vapours 13

5.4 Atmospheres 14

5.5 Operator Safety 14

5.6 Solenoid Valve with Manual Switch (if fitted) 14

5.7 Variable Speed Fan (if fitted) 15

5.8 Exhaust Fan (if fitted) 15

5.9 Stoving and Curing (if fitted) 15

5.9.1 Pre-heater (if fitted) 15

6.0 Maintenance 16

6.1 General Maintenance 16

6.2 Maintenance Schedule 16

6.2.1 Cleaning 18

6.3 Calibration 18

6.4 After-Sales Service 18

6.5 Recommended Spare Parts and Spare Parts Kit 18

6.6 Power Adjustment 18

7.0 Repairs and Replacements 20

7.1 Safety Warning - Disconnection from Power Supply 20

7.2 Safety Warning - Refractory Fibre Insulation 20

7.3 Panel Removal 21

7.3.1 Side Panel 21

7.3.2 Internal Element Cover 21

7.4 Temperature Controller Replacement 22

7.5 Solid-State Relay Replacement 22

7.6 Thermocouple Replacement 22

7.7 Element Replacement 22

8.0 Fault Analysis 23

A. Oven Does Not Heat Up 23

B. Oven Overheats 23

9.0 Wiring Diagrams 24

9.1 WV-11-01 24

9.2 WS-10-01 - Isolating for 208 V version only 25

10.0 Fuses and Power Settings 26

10.1 Fuses 26

10.2 Power Settings 26

11.0 Specifications 27

11.1 Environment 27

1.0 Symbols and Warnings

1.0 Symbols and Warnings

1.1 Switches and Lights

Instrument switch: when the instrument switch is operated the

temperature control circuit is energised.

Solenoid valve (if fitted): see section 5.6 for full details

Variable speed fan (if fitted): see section 5.7 for full details

Exhaust fan (if fitted): see section 5.8 for full details

Stoving and curing (if fitted): see section 5.9 for full details

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

1.0 Symbols and Warnings

2.0 Installation

2.0 Installation

2.1 Unpacking and 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.

Locate the shelves as required.

Some models may be lifted by fitting lifting bolts to captive threads which are fitted in

the top of the case, whilst others may have welded on lifting eyes.

NOTE: This product contains Refractory Ceramic Fibre (also known as

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

this material see section 7.2.

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 Electrical Connections

Connection by a qualified electrician is recommended.

This product requires a single-phase A.C. supply with earth (ground), which may be Live

to Neutral non-reversible (polarised), Live to Neutral reversible (non-polarised), 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. A table of the most common fuse ratings is also given towards the back of this

2.0 Installation

manual. 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.

If the product is to be connected by line plug. The plug should be within reach of the

operator and should be easy to remove.

When connecting the product to an isolating switch ensure that both conductors (single

phase) or on all live conductors (three phase), and should be 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 L Brown to live

to either power

conductor

(For USA 200-240V,

connect L1)

N 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:

3.0 Temperature Controller

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

separately.

3.0 Temperature Controller

4.0 2132 Over-Temperature

4.0 2132 Over-Temperature Controller Description (if

fitted)

4.1 Description

Key

A Alarm Light

B Page

C Scroll

D Down

E Up

F Display

This over-temperature controller is fitted and supplied ready to use by Carbolite Gero.

It is a digital instrument with a latching alarm, requiring no additional panel controls.

The controller features easy setting of over-temperature setpoint and reading of current

temperature by the over-temperature sensor.

4.2 Operation

4.2.1 Controls

Most Carbolite Gero products are fitted with an instrument switch which cuts off power

to the controller and other parts of the control circuit.

To operate the controller, power must be supplied to the product and the instrument

switch must be on. If a time switch is included in the product circuit, this must be in the

'ON' position.

When an over-temperature condition occurs, the controller cuts the power to a

contactor, which in turn cuts power to the heating elements. Power is not restored until

the controller is 'reset'.

Some components will operate after the over-temperature feature isolates the power

supply e.g. cooling fans will continue to operate, provided that there is a power supply

to the product. In some cases the product may not do so, if other options (such as a

door switch) are fitted.

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