User Manual

Preparations
26
5. Preparations
5.1. Installation
• Place the unit on an even surface on a pad made of non-
flammable material.
F34: The circulator fitted with a stainless steel bridge is placed on
on the back of the bath tank leaving the bath open on the front
side.
• The place of installation should be large enough and provide
sufficient air ventilation to ensure the room does not warm up
excessively because of the heat the instrument radiates to the
environment. (Max. permissible ambient temperature: 40 °C).
With regard to a disturbance in the cooling loop (leakage), the
guideline EN 378 prescribes a certain room space to be available
for each kg of refrigerant.
The necessary amount of refrigerant is specified on the type plate.
> For 0.25 kg of refrigerant R134a, a room space of 1 m
3
is
required.
> For 0.52 kg of refrigerant R404A, a room space of 1 m
3
is
required.
> For 0.49 kg of refrigerant R507, a room space of 1 m
3
is required.
• Set selector dial for cooling machine in position "1" for operation
with HE circulator.
(only F25, F34)
• Keep at least 20 cm of open space on the front and rear venting
grid.
• Do not set up the unit in the immediate vicinity of heat sources and
do not expose to sun light
• Before operating the unit after transport, wait about one hour after
setting it up. This will allow any oil that has accumulated laterally
during transport to flow back down thus ensuring maximum cooling
performance of the compressor.
Only water cooled models:
Ensure circulation of cooling water by connecting the tubing to
cooling water inlet and outlet on the rear of the refrigerated
circulator.
• Cooling water connecter G¾"
• Cooling water see page 18
5.2. Bath fluids
Caution:
Carefully read the safety data sheet of the bath fluid used, particularly with regard to
the fire point!
If a bath fluid with a fire point of ≤65 °C is used, only supervised operation is possible.
Water: The quality of water depends on local conditions.
• Due to the high concentration of lime, hard water is not suitable for temperature
control because it leads to calcification in the bath.