Tech Controllers ST-979

TECH
28
Table of contents
I. Safety ...................................................................................................................... 2
II. Description of the device ............................................................................................ 3
III. Controller installation .............................................................................................. 4
IV. How to use the controller ........................................................................................ 4
IV.a) Principle of operation - Lambda sensor .................................................................... 4
IV.b) Operation stages: ................................................................................................. 4
V. Controller functions – main menu ................................................................................ 5
V.a) Block diagram - Main menu .................................................................................. 5
V.b) Fire-up ............................................................................................................... 7
V.c) Fuel tank full ...................................................................................................... 7
V.d) Temperature settings........................................................................................... 7
V.d.1) Pre-set CH temperature ................................................................................. 7
V.d.2) CH boiler hysteresis....................................................................................... 7
V.d.3) Pre-set DHW temperature .............................................................................. 7
V.d.4) DHW hysteresis ............................................................................................ 7
V.d.5) Pump switch on temperature .......................................................................... 7
V.e) Operation settings ............................................................................................... 8
V.e.1) Operation algorithm ...................................................................................... 8
V.e.2) Feeding pause .............................................................................................. 8
V.e.3) Blow force .................................................................................................... 8
V.e.4) Operation in sustain mode ............................................................................. 8
V.e.5) Pause in sustain mode ................................................................................... 8
V.e.6) Fan in sustain mode ...................................................................................... 8
V.f) Modulation settings ............................................................................................. 8
V.f.1) Operation algorithm ...................................................................................... 8
V.f.2) Modulation 30%, Modulation 60%, Modulation 100% ........................................ 8
V.g) Manual mode ...................................................................................................... 9
V.h) Weekly control .................................................................................................... 9
V.h.1) CH boiler operation schedule .......................................................................... 9
V.h.2) CH boiler weekly control ................................................................................ 9
V.h.3) DHW weekly control .................................................................................... 10
V.i) Operation modes ............................................................................................... 10
V.i.1) House heating ............................................................................................ 10
V.i.2) Water tank priority ...................................................................................... 10
V.i.3) Parallel pumps ............................................................................................ 11
V.i.4) Summer mode ............................................................................................ 11
V.i.5) Floor heating .............................................................................................. 11