Thermo Scientific Neslab Dimax, Руководство пользователя

Страница: 12 / 30

- 10 -
The unit’s pump is capable of generating up to 40 psi. The SUPPLY plumbing
should be rated to withstand that pressure.
Tubing and insulation are available from Thermo. Contact our Sales Department
for more information (see Preface, After-sale Support).
It is important to keep the distance between the unit and the instrument being
cooled as short as possible, and to use the largest diameter tubing practical.
Tubing should be straight and without bends. If diameter reductions must be
made, they should be made at the inlet and outlet of the instrument being
cooled, not at the unit.
If substantial lengths of cooling lines are required, they should be pre-filled with
cooling fluid before connecting them to the unit.
Fluids
Never use flammable or corrosive fluids with this unit.
Do not use automobile anti-freeze. Commercial anti-freeze contains
silicates that can damage the pump seals. Use of automobile anti-
freeze will void the manufacturer’s warranty.
The selected fluid must have a viscosity of 50 centistokes or less at the lowest
operating temperatures.
DEI water is the recommended fluid for operation.
NOTE: The DEI cartridge is intended for maintaining resistivity only. If tap water
is used the cartridge will not last very long and will take a long time to come up
to resistivity.
Filling Requirements
The reservoir must be filled with a minimum of 16 gallons to ensure the pump
head remains submerged.
The unit has a nominal evaporation rate of up to 2.5 gallons per day. Ensure
the autorefill system is installed.
Autorefill will activate if the level is below 20 gallons and de-activate above 22.5
gallons.
The total reservoir capacity is 68 gallons (257 liters). To prevent siphoning, all
tank return lines are located at the top of the tank.