135 © STULZ GmbH – all rights reserved EN/01.2019/G22
ec tower technical manual
13.18Installing the front door for Upflow units
Upflow units of size 1 and 2 EC Towers can be connected to an on-site return air duct. To do this, the EC Tow-
er needs to be modified.
NOTE
Contact the manufacturer before modifying the EC Tower.
NOTICE
The EC Tower performance data stated in the technical data are no longer valid if the EC Tower
is connected to an on-site return air duct!
Connecting an on-site return air duct results in pressure drops and changes the flowrate and
incoming flow of the heat exchanger.
technical data are still achieved.
NOTICE
Risk of damage to the EC Tower due to improper connection to an on-site return air duct!
panel or the back of the EC Tower.
-
nents inside the EC Tower.
NOTICE
Risk of damage to the EC Tower if operated without a filter!
13.18.1 Installation instructions
If the EC Tower is connected to an on-site return air duct, replace the central front panel with the front
door. You must also install a filter in the return air duct. The filter is not included with the front door:
customer-supplied.
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