Stulz EC Tower ECD 91 - Replacing the Filter of Upflow Units

65 © STULZ GmbH – all rights reserved EN/01.2019/G22
EC TOWER TECHNICAL MANUAL
Fan
The fan bearings have lifetime lubrication and require no maintenance. Check the operating current. An
increased operating current indicates a winding short-circuit in the fan motor.
Air filter
A filter pressure switch checks the condition of the filter. As soon as the pressure drop via the filter exceeds an
adjustable value, the controller issues a filter alarm. The controller can be configured so that pressure drops
caused by the filter are compensated by increasing the fan speed. Replace the filter promptly.
NOTICE
Cleaning the filter with compressed air can destroy it!
• Do not clean soiled lters with compressed air.
• Replace soiled lters.
9.3.1Replacing the filter of Upflow units
No. Description
1
C7000AT controller
2
Central front panel with filter
3
Door of junction box 1
4
Master switch
No. Description
1
Plastic hose
2
Filter holder
3
Central front panel
4
Filter
4
1
3
2
1
4
2
3
ECU 251 - Front view ECU 251 - Filter