Underneath the back insulating cover (9):
6 Lever for heat exchanger cleaning system (WOS)
7 Actuators for automatic regulation of primary and secondary air
8 Automatic ignition (optional)
9 Back insulating cover
10 Heat exchanger cover: Maintenance opening for cleaning the WOS system and heat
exchanger
11 Main switch
12 Service port
13 STL high-limit thermostat
1
General
S4 Turbo Product Overview
6 Froling GesmbH | A-4710 Grieskrichen, Industriestraße 12 | www.froeling.com