Dhw" Group; Solar" Group - Viessmann Vitotronic 300 GW6B Installation Instructions Manual

Vitotronic 300, GW6B Installation and Service

"DHW" Group

Coding in the factory set condition
"Storage tank heating, hysteresis"
55:0 Tank heating hysteresis ± 2.5 K
"For solar DHW heating: DHW temperature target"
67:40 DHW setpoint temperature 104°F (40°C).
Reheating is suppressed above the selected
set temperature (DHW heating blocked by the
boiler).
"DHW recirculation pump"
73:0 ON according to time program

"Solar" Group

Note: The "Solar" group is only displayed if a solar control module, type SM1, is connected.
Coding in the factory set condition
"Solar circuit pump speed control"
02:0 Solar circuit pump is not speed controlled
"Maximum storage tank temperature"
08:60 DHW setpoint temperature (maximum tank
temperature) 140°F (60°C)
"Stagnation time reduction"
0a:5 Temperature differential for stagnation time
reduction (reduction in the speed of the solar
circuit pump to protect system components
and heat transfer medium) 5 K.
"Solar circuit flow rate"
0f:70 Solar circuit flow rate at maximum pump
speed 1.8 USG/min (7 L/min)
"Extended control function"
20:0 No extended control function enabled
Possible change
55:1 Adaptive storage tank heating enabled
(see page 82)
55:2 Storage tank temperature control with 2
temperature sensors (see page 82).
55:3 Storage tank temperature control, storage tank
loading system (see page 83)
67:0 Adjustable from 32 to 203°F (0 to 95°C)
to (limited by boiler-specific coding)
67:95
73:1 "ON" from once per hour for 5 min up to
to 6 times per hour for 5 min during the time
73:6 program.
73:7 Permanently ON
Possible change
02:1 Variable speed solar circuit pump with wave
packet control
02:2 Solar circuit pump speed controlled with PWM
control
08:10 Adjustable from 50 to 194°F (10 to 90°C)
to
08:90
0a:0 Stagnation time reduction disabled
0a:1 Temperature differential adjustable from
to 1 to 40 K
0a:40
0f:1 Adjustable from 0.02 to 6.7 USG/min
to (0.1 to 25.5 L/min),
0f:255 1 step
20:1 Additional function for DHW heating
20:2 Differential temperature control 2
20:3 Differential temperature control 2 and auxiliary
function
20:4 Differential temperature control 2 for central
heating backup
20:5 Thermostat function
20:6 Thermostat function and auxiliary function
20:7 Solar heating via external heat exchanger
without additional temperature sensor
20:8 Solar heating via external heat exchanger with
additional temperature sensor
20:9 Solar heating of two DHW storage tanks
[Solar heating of two DHW tanks]
Coding level 1
0.02 USG/min (0.1 L/min).
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