Lauda RA 12, Руководство по эксплуатации

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24 / 52 Alpha 7/2022
6.4 Connection of external circuits
Operation as circulation thermostat
An external circulation set is installed as standard for cooling
thermostats and available as accessory for immersion and heating
thermostats (

9).
Assembly for immersion/heating thermostats only:

Pull out the mains plug!

Fix the external circulation set at the bottom of the control
head by means of the two screws (pan head with cross re-
cess). The external circulation set belongs to the right side of
the head. Connect the pump outlet with the short pump noz-
zle using the L-shaped tubing.

Hang the thermostat into the bath and fix the clamp with the
knurled thumb
screw on the edge of the bath.

When used as circulation thermostat, care for shortest hose
connections with largest inner diameter as possible. This gives
the best flow.

Connect 9 mm internal diameter tubing from your applica-
tion to the pump connections.
 Pump connections
– return to bath
– pump outflow or pump pressure side.
Pump connection link (silicone rubber)

 If the cross-section of the tubing is too small

temperature drop between bath and external system
due to low flow rate. Increase the bath temperature appropriately.
 Always ensure the maximum possible flow cross-section in the external circuit!
 If the external consumer is placed at a higher level than the thermostat, the pump is stopped
and air penetrates into the thermostating circuit, the external liquid may drain down into the
bath even with a closed system

danger of flooding the thermostat!
 Protect tubing with hose clips against slipping off!!

When no external consumer is connected to the thermostat, the pump outflow connection
must be linked to the return (pump connection link).