VERDER Carbolite Gero HTMA 6/28 Handbuch

Installation, Operation and Maintenance Instructions

600°C Modified Atmosphere Oven - HTMA Model: 28 Litres

No Controller

HTMA 6/28 + No Controller

MEN-HTMA6028-05_NOCTRL (01-09-2022)

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 5

2.1 Unpacking and Handling 5

2.2 Siting and Setting Up 5

2.3 Flat Pack Stand (optional) 7

2.3.1 Parts Supplied 7

2.3.2 Flat Pack Stand Assembly 8

2.4 Electrical Connections 9

3.0 Temperature Controller 11

4.0 Operation 12

4.1 Operating Cycle 12

4.2 Over-Temperature Control (if fitted) 12

4.3 Explosive Vapours 12

4.4 Variable Speed Fan (if fitted) 13

4.5 Exhaust Fan (if fitted) 13

4.6 Stoving and Curing (if fitted) 13

4.6.1 Pre-heater (if fitted) 13

4.7 HTMA - Manual Gas Control (if fitted) 14

4.8 HTMA - Automatic Gas Control (if fitted) 14

4.9 Oxygen Sensor (if fitted) 14

4.9.1 Recommended Gas Flow Rates 14

4.10 Door Switch (if fitted) 14

5.0 Maintenance 15

5.1 General Maintenance 15

5.2 Maintenance Schedule 15

5.2.1 Cleaning 17

5.3 Calibration 17

5.4 After-Sales Service 17

5.5 Recommended Spare Parts and Spare Parts Kit 17

5.6 Power Adjustment 17

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 Control Panel Removal 19

6.4 Temperature Controller Replacement 20

6.5 Solid-State Relay Replacement 20

6.6 Thermocouple Replacement 20

6.7 Element Replacement 21

6.8 Fuse Replacement 21

7.0 Fault Analysis 22

A. Oven Does Not Heat Up 22

B. Oven Overheats 22

8.0 Wiring Diagrams 23

8.1 WV-11-01 23

8.2 WS-10-01 - Isolating for 208 V version only 24

9.0 Fuses and Power Settings 25

9.1 Fuses 25

9.2 Power Settings 25

10.0 Specifications 26

10.1 Environment 26

1.0 Symbols and Warnings

1.1 Switches and Lights

Instrument switch: when the instrument switch is operated the

temperature control circuit is energised.

Door lock indicator: When this lamp is illuminated, the door is locked

and cannot be opened.

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 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 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 Flat Pack Stand (optional)

The flat pack stand is available in a range of sizes depending on the dimensions of the

product for which it has been ordered. Subsequently, the number of fixings may vary

between the different sizes of stand.

2.3.1 Parts Supplied

Stand Top (x1) Stand Leg (x2)

Stand Cross Brace (x2) M10 Bolt

M10 Washer M10 Locking Nut

2.3.2 Flat Pack Stand Assembly

2.4 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. 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:

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