Installation-, User- and Service Manual
83
5 Draining
5.1 Theta dual service
system
5.2 Heating system
This chapter describes the draining activities to be carried out before final
decommissioning the installation.
First drain the DHW-system. For draining the DHW-system, see Installation-, User- and
Service manual (6 "Draining") of the water heater.
Warning
Before draining the system the water heater and controller of the Theta dual service
module, must be isolated from the mains power supply by using the double poled
isolator.
In order to drain the Theta dual service system is it advised to use the drain valve of the
water heater. By opening the (manual) stop valve you can bleed the system.
In order to drain the heating side of the system use the fill and drain valve (57) in the
heating system.
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