Katherm HK
Assembly, installation and operating instructions
33
6.3.2.3 Condensate drainage using a condensate pump (accessory)
The water is drawn off by the condensate pump and discharged along a hose (supplied loose) connected on the pressure
side. Depending on conditions on site, the water can be discharged into drainage lines, possibly with a trap connection.
In the event of a fault with the condensate drain, the water level will continue to rise until the float switch triggers an alarm
contact. The contact can be analysed by external signalling devices.
We would recommend automatically terminating cooling operation, possibly with a shut-off valve, if the alarm contact is
triggered to prevent the condensate tray from overflowing.
Condensation drain
Drainage of condensation from the condensation pump has to be provided along a natural gradient with an adequate
cross-section (minimum 1/2"). Increase the cross-section of the line with longer condensate lines.
Check whether the condensation line needs to be insulated to prevent the build-up of condensation along the line.
Do not use a rigid transition to the on-site condensation drain, as this lengthens the pump's pressure hose. We would re-
commend free overflow into a trap.
Installation, cabling of the condensation pump (accessory)
The condensate pump needs a separate power supply 230 V/50 Hz. We would generally advise against connecting it via the
room thermostat, as residual condensate could be produced after it has been switched off. Additional wires are needed to
analyse the alarm contact.
Use the following types of cable:
Mains supply: NYM-J, 1.5 mm²
Alarm contact: The cable for the alarm contact depends on the kind of alarm analysis used (e.g. shielded cable).
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