Service/maintenance
OPERATION MANUAL
Chapter 7
Unistat® T300 Series
V2.4.0en/22.07.20//17.12
88
7.3.2
Replacing temperature control or coolant hoses
Replace defective temperature control and/or coolant hoses
before
turning on the temperature control unit.
7.3.2.1
Replacing temperature control hoses
PROCEDURE
Drain the temperature control unit as described on page 70 in section
or on page 73 in section
»Draining externally open applications«
.
Replace defective temperature control hoses. When disposing of them, observe page 17, section
»Proper disposal of resources and consumables«
.
Reconnect your external application as described on page 35 in section
.
Fill the temperature control unit with thermal fluid, as described on page 67 in section
externally closed application«
or on page 71 in section
»Filling and venting externally open application«
.
Vent the temperature control unit as described on page 67 in section
. An externally open application does not need to be vented.
Start the “degassing” function as described on page 68 in section
. An externally open application does not need to be off-gassed.
Restart the temperature control unit in normal mode.
7.3.2.2
Replacing coolant hoses
PROCEDURE
Drain the cooling water as described on page 96 in section
.
Replace the defective coolant hoses. When disposing of them, observe page 17, section
disposal of resources and consumables«
.
Reconnect the temperature control unit to the building’s cooling water supply. Proceed as de-
scribed on page 30 in section
»Temperature control units with water cooling«
.
Restart the temperature control unit in normal mode.
7.3.3
Clean liquefier fins (air-cooled temperature control unit)
Manual cleaning
RISK OF BEING CUT ON THE LIQUEFIER FINS
Wear suitable cut-resistant gloves for cleaning work.
Depending on the ambient conditions, use cleaning equipment such as vacuum cleaners and/or a hand
brush/brush. Follow the local regulations when cleaning. Do not clean the liquefier fins in a clean room
with items like a brush and do not use a vacuum cleaner without an extra-fine particle filter.
Cleaning using pointed or sharp-edged tools
DAMAGE TO THE LIQUEFIER FINS
Clean the liquefier fins using suitable cleaning appliances.
Make sure there is adequate ventilation (removal of waste heat, fresh air supply) for the tempera-
ture control unit, in case of
air cooling, maintain wall clearance
(see page 20, section
illustrations of the cooling variants«
and page 26, section
).
The liquefier fins must be cleaned (dust) from time to time as only then will the temperature con-
trol unit perform at its maximum cooling capacity.
Identify the position of the ventilation grille, usually located on the front. With some temperature
control units, the ventilation grilles on the side wall, rear or on the underside (table units) of the
temperature control unit.
PROCEDURE
Ventilation grille on the front/rear or on a side wall
Turn off the temperature control unit.
Disconnect the temperature control unit from the power supply.
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