Grant Instruments LTC2 - Manual (Page 7)

LTC2 30933 V2
Operating Manual Page 6
www.grantinstruments.com
4.0 Operating instructions
4.1
Unpacking instructions
Standard equipment includes:
 LTC2 low temperature circulator
 Pump connector kit
 4 x Jubilee clips
 6m of insulated hose
 Mains cord
The LTC2 weighs 25kg. Take necessary precautions when lifting.
Remove packing materials carefully and retain them for future shipment or storage of the
equipment.
4.2
Recommended liquids
The following table lists the recommended liquids for different temperature ranges.
Always ensure the liquid used is safe and suitable for your working temperature. If using
non-recommended heat transfer liquids, it is the responsibility of the user to conduct an
assessment to ensure the intended fluid is compatible with the LTC2. If in doubt please
contact the Grant technical support team.
To ensure protection the overtemperature cut-out must be set appropriately for
the heat transfer liquid selected (see table below).
If using non-recommended heat transfer liquids it is important to set the over-
temperature cut-out to a value no higher than 25°C below the fire point of the
liquid.
Use fume extraction when using silicone fluids at elevated temperatures
Temp range
Recommended liquid Comments
-30°C to 30°C
50% water, 50%
antifreeze (inhibited
ethylene glycol) WARNING: Ethylene glycol is toxic – follow the
manufacturer’s instructions.
For safe disposal consult the local regulations.
Use a lid to reduce the dilution of the mixture
caused by condensing water vapour from the
air, and to maintain the cool down rate.
0°C to 30°C
80% water, 20%
antifreeze (inhibited
ethylene glycol)
5°C to 99.9°C
Water* Water can be used but care should be taken
above 60°C as hot vapour can be dangerous.
Use a lid or polypropylene spheres above
60°C to ensure good performance & reduce
evaporation.
At temperatures approaching 99°C the
temperature performance will be affected due
to localised boiling.
The units should not be used to boil water.
70°C to 120°C
Silicone fluid
Viscosity ~20cs
Flash point ≥230°C
Fire Point ≥280°C Dow Corning DC200/20 silicone fluid is a
suitable liquid – follow the manufacturer’s
instructions.
For safe disposal consult the local regulations.
* See section 7.1 for further details