QBD, QBA, QBH, 32331 Ver 1
Operating Manual Page 4
www.grantinstruments.com
EN
1. Unpack the unit carefully and retain packaging for future shipment or storage.
2. The pack includes: Block heater, Mains cable, Operating instructions, Extrac-
tor tool.
3. Plug the mains cable into the socket at the rear of the unit and position to al-
low easy access to the power switch and connector.
4. Fit the desired block(s) into the heater well. Ensure that the heater bed and
the bottom of the blocks are clean in order to ensure good thermal contact be-
tween heater and blocks resulting in optimal temperature control performance.
5. Turn the unit on by pressing the mains switch on the front of the unit. The dis-
play will illuminate showing the current temperature of the block.
6. Press the ‘S’ button and adjust the set temperature using the knob. Press ‘S’
to select the temperature or press ‘F’ to exit without changing the value.
7. The block heater will now begin to heat the blocks. The heater light will illumi-
nate continuously during the heating phase but will begin to flash when the set
temperature is approached.
8. Allow the block(s) to stabilise at the set temperature before use.
9. To turn unit off, press the mains switch on the front. The set temperature will
be stored in memory. Allow unit to cool before completing any maintenance.
Extractor tool:
The extractor tool enables the user to remove blocks safely and easily. The tool can
be stored on the rear of the unit in the mounting bracket provided. The tool should
be screwed tightly into the threaded hole/holes in the block and then the block lifted
out.
N.B. One tool is provided with the unit for use with single blocks. A second tool is
provided with the double size blocks which require the use of two tools.
3. Operation of QBD,QBH
Mains switch
Fault indicator
Heater indicator
Control knob
Removable block
Mains inlet Display
(F)unction & (S)elect buttons
Extractor tool storage bracket
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