Carbolite AX120 User Manual

CONTENTS

Section Page

Installation, Operation &

Maintenance Instructions

250°C Laboratory Fan Ovens – Apex Range

models AX30, AX60 & AX120

This manual is for the guidance of operators of the above Carbolite products

and should be read before the oven is connected to the electricity supply.

This manual should supply all the information required for safe and trouble-

free oven operation. Information on controller operation is included.

MF42 – 1.10

Apex Series Ovens

DANGER of electrical shock– read any warning printed by this symbol.

DANGER – hot surface. Read any warning printed by this symbol.
WARNING: all surfaces of an oven may be hot.

DANGER – read any warning printed by this symbol.

1.0 INTRODUCTION

1.1 The APEX range

The Apex range of fan ovens comprises three models, of 30, 60 & 120 litres chamber capacity,

known as models AX30, AX60 and AX120

Temperature control is by an easy-to-operate digital unit. The oven temperature range is from

40°C 250°C. The minimum temperature may be higher if the ambient temperature is above 30°C.
Heat up times to 250°C without load and on a 240V supply are approximately 25 minutes; with
load or at lower voltages these times are increased.

A matching digital timer is available to order, or may be retro-fitted*. A second option is a

hydraulic thermostat overtemperature control device. Without the overtemperature device the
ovens conform to BS 2648; with the device they also conform to DIN 12-880 class 2. There is also

the option of a locking handle.
* AX120 at 110-120V – please enquire
Temperature accuracy is enhanced by the use of a platinum resistance thermometer as the

temperature control sensor. A simple air-flow adjustment may be made by movement of a sliding

vent control mounted at the back of the oven. Typical air-flow with the vent open is 1850

litres/hour at 100°C, giving exchanges in chamber volumes per hour of 65 (AX30), 28 (AX60) or

14 (AX120).
The door is hinged on the left for easy loading and unloading of work.

1.2 Voltage

These models must be ordered correctly to match the supply voltage. The voltage alternatives are:

 Single phase 220V-240V

 Single phase 110V-120V

1.3 Switches and Lights

When the oven is connected to the electrical supply, and the instrument switch is on the controller

is illuminated.

1.4 Warning Symbols

2 MF42 1.10

Apex Series Ovens

CONNECTION DETAILS

supply type

Supply

Terminal label

Cable colour

Live-Neutral

Reversible or Live-Live

1-phase

L

Brown

To live

to either power conductor

N

Blue

To neutral

to the other power conductor

PE

Green/Yellow

To earth (ground)

to earth (ground)

2.0 INSTALLATION

2.1 Unpacking & Handling

Remove the shelves, runners and hangers from the packaging before installing the equipment.
Lift the unit by its base. The door should not be used to support the equipment when moving it.

Use two people to carry the oven where possible. Remove any packing material from the inner

chamber before use.

2.2 Siting & Setting Up

Place the oven on a level surface. If the overtemperature protection option is not fitted, ensure that

the unit can be directly observed.
Ensure that there is at least 50mm of free space behind the oven and 25mm at the sides. There are

vents in the back that must not be obstructed.
Ensure that the oven is placed in such a way that it can be quickly switched off or disconnected

from the electrical supply - see below.
The two shelf hangers should be fitted into the slots provide on the left

hand side of the chamber. The vertical parts of the runners should be

inserted into the holes in the hangers (on the left) or the fan cover (on

the right), front and back simultaneously; the runner should then be

rotated in a downwards direction to secure it in place. The shelves slide

onto the runners such that the spurs on the lower side of the shelf are

under the runner at the back, preventing the shelf from tilting forwards

when partially withdrawn.
Plan to use the shelves, not the oven floor (see section 3.6).

2.3 Electrical Connections

Connection by a qualified electrician is recommended.

The Apex ovens are made only for single phase A.C. supply, which may be Live to Neutral non-

reversible (polarised), Live to Neutral reversible (non-polarised) or Live to Live. Check the oven

rating label before connection. The supply voltage should agree with the voltage on the label, and

the supply capacity should be sufficient for the amperage on the label.
The supply should be fused at the next size equal to or higher than the amperage on the label. The

fuse ratings are given in section 7.3 of this manual. Internal supply fuses are fitted in these models,

but customer fusing is also recommended.
The oven is fitted with a supply cable. This may be fitted with a line plug or wired directly to an

isolator. Ensure that the unit can be quickly disconnected from the supply.
The supply MUST incorporate an earth (ground).

MF42 1.10 3

Apex Series Ovens

R38

U

OUT1

3.0 OPERATION

3.1 Operating Cycle

The oven is fitted with an instrument switch. The switch cuts off power to the control circuit.
The oven has fan-assisted circulation; the fan is on when the instrument switch is on.
Connect the oven to the electrical supply.
Operate the instrument switch to activate the temperature controller. The controller becomes

illuminated and goes through a short test cycle.
If no process timer is fitter, the controller becomes illuminated and goes through a short test cycle.

If a timer is fitted, the controller may not become illuminated when the oven is switched on – to

start the controller, press the U button on the timer once (see section 3.3).
Adjust the temperature controller - see section 3.2.
Process timer option. See section 3.3 for timer setting and operation.
Overtemperature option. If the hydraulic thermostat overtemperature option is fitted, set the rotary

dial to the desired protection temperature.
Unless a process timer is fitted, and is off, the oven starts to heat up according to the controller set

point.
To turn the oven off, set the Instrument switch to it’s off position; the controller display will go

blank. If the oven is to be left off unattended, isolate it the electrical supply.

3.2 Controller Operation

When switched on, the controller lights up, goes through a short test routine, and then displays the

measured temperature and starts to control. The output light OUT1 indicates when heating is

occurring.
To alter the setpoint, press the down arrow key once, “SPI” flashes. Then use the up and down

arrow keys to adjust the setpoint. Press the P key to accept.

4 MF42 1.10