Viessmann VITOCAL 200-G, Инструкция по установке и обслуживанию

Страница: 107 / 208

Checking the antifreeze concentration in the brine circuit
Check the antifreeze concentration
and record it in the service report from
page 190. The system must be protected against
frost down to
−
15 °C. Otherwise,
replace the heat transfer medium.
Checking the sensor connections
Check whether all sensors have been
connected as per the connection dia-
gram on page 176. For this, scan "Sensor temperatures".
Operating instructions
Checking the secondary pump
Note
This check can only be carried out if an instantaneous heating water heater
(accessories) is installed.
Otherwise, check the secondary pump with the heat pump (see page 110).
1. Start the test program:
Menu item
&
" Device settings "
&
" Contractor level "
&
" Commissioning "
&
" Secondary pump "
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. Observe the temperatures at the
"
Secondary flow " and the " Sec-
ondary return ". The temperatures
must rise.
Otherwise check the instantaneous
heating water heater (see
page 118, fault message "D7").
The throughput is too low if, after
prolonged operation (10 to 30 min),
the temperature differential
Δ
T > 3 K.
Increasing the throughput:
&
Vent the equipment again (see
page 100)
&
Increase the speed of the sec-
ondary pump
&
Replace pump if necessary
3. Set the " Heating/DHW " mixer with
c
to " 0 ".
4. See item 2.
Further details regarding the individual steps
(cont.)
107
Commissioning, inspection, maintenance
55
92
968
GB
Service