Lauda RE 104, Руководство по эксплуатации

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Unit description
13.04.99
YACE0059
3
3 Unit description
3.1 Unit types
The type designation of the Ecoline low-temperature thermostats consists of the letter R
(identification as low-temperature unit), the control unit E 100 and the type of bath and refrigeration
system.
Example: Refrigeration unit R, Control unit E 100 and bath and refrigeration system 004 produces
Thermostat Type RE 104.
Type RE 120 is supplied without bath cover. A bath cover is available as accessory. (
➾
Section 10.
Accessories).
3.2 Pumps
All units are equipped with a pressure pump with vario drive. The pump has an outflow with a rotatable
bend which is connected to the pump nipple for external thermostating units. An additional outflow
provides circulation inside the bath.
By turning the setting knob it is possible to choose between both outlets or to divide the flows.
The pump ca n be used up to viscosities of 150 mm²/s. However, to get an optimum accuracy of control
a viscosity of 30 mm²/s is recommended.
One of five pump output steps can be selected using the operating menu.
On small low-temperature thermostats (e.g. RE 104 or RE 106) and with operation as bath thermostat it
is advisable to use output step 2. The advantage is a low heat generation while having a uniform
circulation.
When operating as circulation thermostat with an external circuit it is preferable to use a larger flow rate
in order to ensure a small temperature difference, especially at higher temperatures and in conjunction
with oil as the bath liquid.
The pump outflow connection can be closed without causing any damage to the pump.
Pump characteristics (
➾
Section 9. Technical data)