Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 49 / 160

3. Confirm your choice by pressing
"
CONTINUE " (component selected
or "ignored") and continue to the
next available component for pos-
sible selection.
4. Pressing " CONTINUE " again saves
the system configuration once all
available components for the spe-
cific system design have either
been selected or deselected
("ignored").
The configuration program is termi-
nated automatically.
Checking the sensor connections
Check whether all sensors have been
connected as per the connection dia-
gram on page 133. For this, scan "Sensor temperatures".
Operating instructions
Checking the external heating circuit pumps
Note
The following test program is not
required for system versions without
external heating circuit pumps.
1. Start the test program:
Menu item
&
" System settings "
&
" Tech. service level "
&
" Commissioning "
&
" Further menu items "
&
" Heat. circuit 1 pump "
or
"
Heat. circuit 2 pump "
(if installed)
Note
The time elapsed since the start of
the test program is shown in the top
r.h. corner of the display. Further-
more, the status of all components
that are part of the test procedure
is displayed.
2. Determine the temperature differ-
ential between the heating flow and
return of the respective heating cir-
cuit using a contact thermometer.
3. Determine and enter the actual
values and test conditions in accor-
dance with the commissioning/ser-
vice report from page 143.
4. The heating flow temperature must
reach the temperature at the
"
Buffer storage " ± 2 K; the heating
return temperature must be higher
than the room temperature.
Otherwise the throughput is inade-
quate.
Increasing the flow rate:
&
Vent the heating circuits
&
Increase the speed of the exter-
nal heating circuit pump
&
Replace the pump, if required
Further details regarding the individual steps
(cont.)
49
Commissioning, inspection, maintenance
55
92
901
GB
Service