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).
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