Carbolite LHT Руководство по установке, эксплуатации и техническому обслуживанию - Страница 6
Просмотреть онлайн или скачать pdf Руководство по установке, эксплуатации и техническому обслуживанию для Печь Carbolite LHT. Carbolite LHT 16 страниц. Laboratory & industrial high temperature ovens and high temperature clean room ovens
Печатать страницуHigh Temperature Ovens
3.5
Variable Speed Fan Option
When this is ordered, a variable speed control is fitted in the fan circuit. Operation of the control is
self-explanatory.
Please note that there is a minimum setting at which the fan motor starts up when the oven is
switched on. Find this setting by experiment, and mark the position on the control or front panel.
It is unlikely that a control setting of less than 50% would be required, as there would be very
little air flow around the oven.
3.6
Exhaust Fan Option
Start the extraction unit using the amber switch on the control panel; this is only functional when
the instrument switch is on.
The amount of air exhaust can be controlled by adjusting the slider under the exhaust box.
When the exhaust fan is turned on, there may be a drop in internal temperature before the oven
recovers to the setpoint value.
When working near to the maximum temperature, the airflow should be small to reduce the
amount of energy wasted in heating air.
3.7
Stoving and Curing Option
The oven is fitted with an explosion relief panel and a powered exhaust fan. The exhaust fan is
physically similar to that described above.
With this option the fan runs all the time that the oven is switched on.
A pressure switch detects that there is sufficient air flow through the chamber, and prevents the
oven from heating if the exhaust fan is not working correctly. If the pressure switch does not
detect sufficient air flow, a fault light comes on and the oven is prevented from heating up.
At least 200mm free space must be left at the back and side of the oven to allow the explosion
relief panel to break out if there is a rapid build up of pressure inside the chamber.
6
MF16