Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual page 121

Coding 2
(continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
4A: 0 General
4b: 0 General
4C: 0 General Connection at plug sÖA1:
Heating circuit pump
4d: 1 General
4E: 0 General
4F: 5 General
54: 0 General
55: 0 DHW
56: 0 DHW
58: 0 DHW
Plug aJA not installed
Plug aJB not installed
p g sÖ
Connection at plug sL:
Shunt pump
Connection at plug gS:
3-way mixing valve for return
temperature control
Shunt pump with 5 minutes p p
run-on time
Without solar control
DHW tank heating,
differential +/- 2.5 K
Setting range of domestic
hot water temperature 10 to
60°C / 50 to 140°F
Without additional function
for domestic hot water
heating
New coding Possible change
Address:
Value
4A: 1 Plug aJA installed (e.g. temperature sensor of
Therm-Control);
automatically recognized
4b: 1 Plug aJB installed (e.g. temperature sensor
T2); automatically recognized
4C: 1 Primary pump of DHW tank loading system
4C: 2 Switch contact of Therm-Control
4C: 3 Circulation pump of flue gas/water heat
exchanger
4d: 2 Boiler circuit pump
4E: 1 3-way valve of DHW tank loading system
4F: 0 Shunt pump without run-on time
4F: 1 Run-on time adjustable from 1 to 60 minutes
to
4F: 60
54: 1 With Vitosolic 100; automatically recognized
54: 2 With Vitosolic 200; automatically recognized
55: 1 Optimized DHW tank heating active
(takes into account the rate at which the DHW
tank temperature increases during domestic hot
water heating)
55: 2 DHW tank temperature control with 2 DHW
tank temperature sensors
55: 3 DHW tank temperature control of DHW tank
loading system
56: 1 Setting range of domestic hot water
temperature 10 to 95°C / 50 to 203°F
¨ Safety instruction!
Observe max. DHW temperature
Adjust adjustable high limit "R"
58: 1 Input of a 2nd desired DHW temperature value;
to variable between 1 and 95°C / 34 and 203°F
58: 95 (note coding address "56")
Please note:
The DHW tank is heated to the 2nd set-point
value during the 4th activation period for
domestic hot water heating (see operating
instructions regarding settings).
Additional information
121