Technical data

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To access the ‘setup parameters’ use the forward button to reach the
last ‘information only’ option, then press and hold the forward button
until the first of the ‘setup parameters’ is shown (Arr).
The forward and backward buttons can then be used to index
through the ‘setup parameters’.
7.5.1 Arr System Arrangement
Range - Arr 1 or Arr 2 ~ Default Arr 1
Arr 1 Sets the system for solar only heating control.
Only setup parameters for standard system will be shown.
Arr 2 Sets the system for solar and auxiliary heat source or heat
circulating control.
Only setup parameters for system with auxiliary heat source or
heat circulating will be shown.
Relay R2 is used for auxiliary source or heat circulating pump.
IMPORTANT
Arr 1 or Arr 2 must be set on commissioning to suit the system
installed.
THE SETTING MUST NOT BE CHANGED THEREAFTER.
7.5.2 DT O Solar Pump Switch ON Temperature Differential
Range - 1.0K to 20.0K ~ Default 6.0K
The collector temperature as detected by S1 minus the cylinder temperature
as detected by S2 equals the solar temperature differential.
Solar Temperature Differential = S1 temp. - S2 temp.
The solar pump is switched On (R1 On) when the solar temperature
differential exceeds the set DT O value.
When ‘COL’ S1 temp. - S2 temp. > DT O R1 is On.
DT O recommended setting = 6°C
DT O must be at least 1°C above set DT F value.
7.5.3 DT F Solar Pump Switch OFF Temperature Differential
Range - 0.5K to 19.5K ~ Default 4.0K
Also see DT O 7.5.2.
The solar pump is switched Off (R1 Off) when the solar temperature
differential is below the set DT F value.
When ‘COL’ S1 temp. - S2 temp. < DT F R1 is Off.
DT F recommended setting = 4°C
DT O must be at least 1°C below set DT O value.
Arr 2Arr 1
FIG. 7.5A A RR 1 AND ARR 2 SYSTEM A RRANGEMENTS
7.5 SETUP PARAMETERS MENU
OPTIONS
Note
Options that display can be
set changed - for procedure see
5.5.
Arr
1
Arr
2
DT O
# #. #
DT F
4.0K