Solar - Viessmann Vitoladens 300-W Installation And Service Instructions For Contractors

Codes
Coding level 2
(cont.)
Coding in the delivered condition
65:... Information on the type of diverter
valve (never adjust; specified by
the boiler coding card)
67:40 For solar DHW heating: set DHW
temperature 40 °C. Reheating is
suppressed above the selected set
temperature (boiler only starts as
backup if the rise in the cylinder
temperature is too low).
6C:100 Set speed of internal circulation
pump for DHW heating 100 %
6F:... Max. heating output for DHW heat-
ing in %; specified by the boiler
coding card
71:0 DHW circulation pump: "ON" ac-
cording to time program
72:0 DHW circulation pump: "ON" ac-
cording to time program
73:0 DHW circulation pump: "ON" ac-
cording to time program

Solar

Coding
Coding in the delivered condition
00:8 Start temperature differential for
solar circuit pump 8 K.
01:4 Stop temperature differential for
solar circuit pump 4 K.
02:0 Solar circuit pump not speed-con-
trolled
03:10 Temperature differential for the
start of the speed control 10 K.
04:4 Controller amplification of speed
control 4 %/K.
05:10 Min. speed of the solar circuit
pump 10 % of max. speed
54
Possible change
67:0 Set DHW temperature adjustable
to from 0 to 95 °C (limited by boiler-
67:95 specific parameters)
6C:0 Set speed adjustable from 0 to
to 100 %
6C:100
6F:0 Max. heating output for DHW heat-
to ing adjustable from min. heating out-
6F:100 put to 100 %
71:1 "OFF" during DHW heating to set
value 1
71:2 "ON" during DHW heating to set val-
ue 1
72:1 "OFF" during DHW heating to set
value 2
72:2 "ON" during DHW heating to set val-
ue 2
73:1 "ON" from once per hour for 5 min
to up to 6 times per hour for 5 min dur-
73:6 ing the time program
73:7 Constantly "ON"
Possible change
00:2 Start temperature differential adjust-
to able from 2 to 30 K.
00:30
01:1 Stop temperature differential adjust-
to able from 1 to 29 K.
01:29
02:1 Solar circuit pump is speed-control-
led with wave packet control (do not
adjust)
02:2 Solar circuit pump speed-controlled
with PWM control
03:5 Temperature differential adjustable
to from 5 to 20 K.
03:20
04:1 Controller amplification adjustable
to from 1 to 10 %/K.
04:10
05:2 Min. speed of solar circuit pump ad-
to justable from 2 to 100 %.
05:100