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16. Symbols on the switch have the following meanings:
I : mains switch On
O : mains switch Off
TE-10D And TU-20D Only
17. If the pump has been set correctly for external circulation, suitable hoses should be tted to the outlet and
return pipes. A suitable hose must be capable of withstanding both the temperature of operation and the
liquid being used. Always securely clip the hoses in place.
Hose material Allowable temperature range Comments
PVC 10°C to 60°C (50°F to 140°F) For water only
Silicone -40°C to 200°C (-40°F to 362°F) NOT for silicone oil
Viton -20°C to 250°C (-4°F to 482°F)
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