3
6 Electrical
connection
27
6.1 General
27
6.1.1 Mains
voltage
27
6.1.2 Control
connections
27
7 Controls
31
7.1 Control
box
31
7.2 Boiler
control
32
7.2.1 Introduction
32
7.2.2
Simple time clock and on/off room thermostat (control based on
time and room temperature)
32
7.2.3
Modulating OpenTherm® room controller (control based on time
and room temperature)
32
7.2.4
Outside-temperature sensor (control based on outside temperature
and settings as in Fig. 20)
32
7.2.5 Frost
protection
34
7.2.6
Boiler temperature control
34
7.2.7
Low water level protection
34
7.2.8
Maximum protection (over heat thermostat)
34
8 Commissioning
36
8.1
Putting into operation
36
8.2
Gas rate measuring
37
8.3
Handing over
38
9 Control
39
9.1
The instrument panel
39
9.1.1 General
39
9.1.2
Instrument panel structure
39
9.2
Meaning of the various modes
40
9.2.1 General
40
9.2.2 Temperature
mode
40
9.2.3 Programming
mode
40
9.2.4 Service
mode
43
9.2.5
‘Forced High’ mode
43
9.2.6
‘Forced Low’ mode
44
9.3
Adjusting parameters for the installer
44
9.3.1
DHW three-way valve (J)
46
9.3.2
Pump speed - central heating operation (L)
46
9.4
Putting the boiler out of operation
46
