Viessmann VITOCAL 222-G Fiche technique Page 116

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Vue de la page 115
3. Start the compressor by pressing
"ON".
Note
The compressor will start automati-
cally after expiry of the 250 s long
test.
4. Determine the temperature differ-
ential ΔT between the primary inlet
(display "Primary in") and outlet
(no display, use contact thermo-
meter).
Set values ΔT:
&
3 to 5 K at 35 °C for "Secondary
flow" and 10 °C for "Primary in"
&
2 to 4 K at 35 °C for "Secondary
flow" and 0 °C for "Primary in"
5. Record the results in the service
report from page 216.
If the set values are not achieved:
&
Vent the primary circuit
&
Check the pump connections
&
Change the pump stage
&
If required, use a larger pump
6. Terminate the test program with
"BACK".
Checking mixers, heat pump and cylinder heating
Checking the mixer and heat pump
1. Start the test program:
Menu item
&
"Device settings"
&
"Contractor level"
&
"Commissioning"
&
"Compressor"
2. Start the compressor by pressing
"ON".
Note
The compressor will start automati-
cally after expiry of the 250 s long
test.
3. Check the following temperature
and record it in the service record
sheet from page 216:
The temperature at "DHW cylinder
top" must remain constant (toler-
ance: ±1 K).
Otherwise:
&
Check whether the mixer is cor-
rectly adjusted
&
Check the electrical mixer con-
nections (see page 200)
&
Replace the mixer, if required
Further details regarding the individual steps (cont.)
116
Commissioning, inspection, maintenance
5592 969 GB
Vue de la page 115
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