Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 110

Code 2
"DHW" Group
Coding in the factory set condition
66:4 Input of the set DHW temperature:
At the control unit programming unit and
all installed Vitotrol 300A remote controls.
67:40 For solar DHW heating:
Set DHW temperature 104°F (40°C). Reheating
is suppressed above the selected set temperature
(DHW heating by the boiler only if solar energy is
not sufficient).
68:8 With 2 DHW tank temperature sensors (code
"55:2"):
DHW tank heating stop point at set value x 0.8.
69:7 With 2 DHW tank temperature sensors (code
"55:2"):
DHW tank heating start point at set value x 0.7.
6A:75 Runtime, servomotor, mixing valve, heat
exchanger set, Vitotrans 222, (80 and 120 kW):
75 sec.
70:0 DHW recirculation pump "ON" according to time
program when DHW heating is enabled.
71:0 DHW recirculation pump:
"ON" according to time program.
72:0 DHW recirculation pump:
"ON" according to time program.
73:0 DHW recirculation pump:
"ON" according to time program.
75:0 DHW recirculation pump "ON" during economy
mode according to time program.
110
(continued)
Vitotronic 300, GW2B Installation and Service
Possible change
66:0 At the control unit programming unit.
66:1 At the control unit programming unit and remote
control heating circuit A1 (heating circuit ).
66:2 At the control unit programming unit and
remote control heating circuit with mixing valve
M2 (heating circuit 2).
66:3 At the control unit programming unit and
remote control heating circuit with mixing valve
M3 (heating circuit 3).
66:5 At the remote control heating circuit A1
(heating circuit 1).
66:6 At the remote control heating circuit with
mixing valve M2 (heating circuit 2).
66:7 At the remote control heating circuit with
mixing valve M3 (heating circuit 3).
67:0 No third set value.
67:10 Set DHW temperature adjustable from 50 to
to 203°F (10 to 95°C) (limited by boiler specific
67:95 parameters).
Observe the setting of coding address "56".
68:2 Factor adjustable from 0.2 to 1;
to 1 step 0.1
68:10
69:1 Factor adjustable from 0.1 to 0.9;
to 1 step 0.1
69:9
6A:10 For heat exchanger set Vitotrans 222 (240 kW):
to set 113 sec.
6A:255 Runtime adjustable from 10 to 255 sec.
70:1 DHW recirculation pump "ON" according to
time program.
71:1 "OFF" during DHW heating to the first set value.
71:2 "ON" during DHW heating to the first set value.
72:1 "OFF" during DHW heating to the second set
value.
72:2 "ON" during DHW heating to the second set
value.
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 Constantly "ON".
75:1 DHW recirculation pump "OFF" during economy
mode.