Viessmann Vitodens 222-F B2TB, Application Manual

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Vitodens 222-F, B2TB
Application 2 - Operational Setup Instructions
1. The coding parameters described above are modified
in level 2 coding.
Step1
: To access this coding you must hold the "OK"
key and "Ext. Menu" key together for 5 seconds. This
gives access to the service level.
Step 2
: Hold the "OK" key and "Return" key for 5
seconds. This gives access to level 2 coding.
Notes/Comments
In this system you have a Vitodens 222-F, and a four zone single temperature system. Upon a call for heat,
a zone valve opens turning on the P1(internal) & P3 circulators. In the event there is a call for DHW, the flow
provided by the P1 Circulator will be diverted through the internal plate heat exchanger. This will provide a do-
mestic priority function for the purpose of quickly satisfying a DHW demand. It is recommended to use a vari-
able speed system circulator that will adjust flow based on opening/closing zone valves. If a single speed pump
is being used, ensure a pressure differential bypass is incorporated into the system to avoid “over pumping” a
circuit when a single zone is calling for heat. To setup the boiler for this application you will need
to compete the following:
Type/Option Step # Description Parameter Set to:
Setup
Location
1
Assign P3 as a heat circuit pump
53: :02
Set in
Level 2
Coding
2
Configure boiler to operate upon a call for heat
Activates DE1 Contact 3A :01
Initiates Changeover D5 :01
Identifies changeover based on DE1 contact D8 :01
Time limit for changeover F2 :0
Temperature Limit for disabling changeover F8 -61
Adjust Daytime schedule
--
Set in
heating
sub menu
Set Reduced room temperature 3ºC
3
Setup HC1 Outdoor Reset Curve
4
Set DHW Temperature
Optional Adjustments
Set a Heating Schedule.
Set in
heating
sub menu
Set an individual DHW Schedule
Configure P1 to shut down once low loss header has reached its setpoint temperature 51: :01
Set in
Level 2
Coding