VERDER CARBOLITE GERO LGP 2/500 Manual

Installation, Operation and Maintenance Instructions
250°C Large General Purpose Oven - LGP Model: 500 Litres
No Controller
LGP 2/500 + No Controller
MEN-LGP2050-001_NOCTRL (18-10-2021)

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 Warnings 4
2.0 Installation 6
2.1 Unpacking and Handling 6
2.2 Siting and Setting Up 6
2.3 Electrical Connections 7
2.4 Fan Rotation Indicator 9
3.0 Temperature Controller 10
4.0 Operation 11
4.1 Operating Cycle 11
4.1.1 Exhaust Fan Adjustment 12
4.2 Operating Cycle 12
4.3 Over-Temperature Control (if fitted) 13
4.4 Explosive Vapours 13
4.5 Exhaust Fan (if fitted) 13
4.6 Door Switch (if fitted) 13
4.7 Loading and Unloading Chamber 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 Panel Removal 19
6.4 Temperature Controller Replacement 20
6.5 Fuse Replacement 20
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6.6 Element Replacement 20
6.7 Thermocouple Replacement 21
6.8 Solid-State Relay Replacement 21
7.0 Fault Analysis 22
A. Oven Does Not Heat Up 22
B. Oven Overheats 22
8.0 Wiring Diagrams 23
9.0 Fuses and Power Settings 24
9.1 Fuses 24
9.2 Power Settings 24
10.0 Specifications 25
10.1 Environment 25
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1.0 Symbols and Warnings
The following information includes different product options. They may not all apply to
your product.
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.
Exhaust fan (if fitted): see section 4.5 for full details
Supply Light: when the product is connected to the electrical
supply the light in the adjacent switch glows
1.2 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.
4

WARNING -
Do not use solvent substances within this product.
WARNING -
This product is large enough for a person to enter the
chamber. Ensure that no one is within the chamber
before closing the door.
5

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
Note: This LGP oven is supplied with a floor stand that elevates it approximately 500
mm off the ground.
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.
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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.
The product covered by this manual usually 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 star or delta.
Check the product rating label before connection. The supply voltage should agree with
the voltage on the label and the electrical supply capacity should be sufficient for the
current on the label.
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A table of the most common fuse ratings is also given in section 9.0 towards the back
of this manual. Ensure that the correct fuse is used for the product supplied. When the
mains cable is factory fitted internal fuses are also fitted. Customer fusing is essential.
Product with supply cable: either wire directly to an isolator or fit with a line plug.
Product without supply cable: a permanent connection to a fused and isolated supply
should be made to the internal terminals after temporary removal of the product access
panel. The access panel is located at the top of the 'A' models and the right hand side
of the 'B' models.
Connection by line plug: the plug should be within reach of the operator and should be
easy to remove.
Connection to isolating switch: this should operate on both conductors (single phase) or
on all live conductors (three phase), and should be within reach of the operator.
The electrical 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 (except delta)
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.
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2.4 Fan Rotation Indicator
Note: Do not connect an oven ordered for three phase use to a single phase supply
or to the wrong type of three phase supply.
Check that the fan motor rotation is as shown on the fan motor(s). If it is incorrect
change the phase rotation of the incoming supply to achieve correct rotation.
The correct rotational direction is essential to achieve the specified temperature
uniformity.
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3.0 Temperature Controller
If this product is fitted with a temperature controller, instructions are provided
separately.
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