Lauda RP 1290, Operating Instructions Manual

Page: 24 / 127

Proline Low-temperature Thermostats
24
Preparation
YACE0072 / 21.08.07
6.4 Connecting external loads
Operation as circulating thermostat
−
When used as circulation thermostat, care for
shortest hose connections with largest inner
diameter as possible. This gives the best flow.
−
Push hose with 11-12 mm internal width onto
hose olive or connect metal hoses (
Ì
6.3) to
pump connectors.
−
Pump connectors at side:
Inlet and outflow
Ì
see labeling housing.
−
Pump connectors at back:
Inlet and outflow
Ì
see labeling housing.
−
Set bypass valve to "external" (
Ì
3).
−
If cross-sectional area of tube is too low
Æ
temperature gradient between bath
and external load due to low flow rate.
−
Always ensure the largest possible passages in the external circuit.
−
When tightening the union nuts on the pump nipple AF 19, use a wrench AF 14
to counter the tightening torque (see figure).
−
If external control is to be used, provide a Pt100 probe in the external load (
Ì
Section 7.7.2 and 7.7.4).
−
With loads at a higher position and with stationary pump and ingress of air into
the thermostatic circuit, the external volume can drain away, even with closed
circuits
Æ
Risk of thermostat overflowing!
−
Secure hoses against slippage with hose clips.
−
Unused pump connectors must be closed off.