Operation With External Heat Generator (Not For Compact Appliances) - Viessmann VITOTRONIC 200 Service Instructions Manual

Primary source ice store/Solar air absorber
Summer mode ends under the following conditions:
■ If, on a single day after "Calendar week, earliest
end summer mode, ice store 703A", the heat
pump was operating to provide central heating for
more than the " Min. runtime to suppress summer
mode 7035".
or
When the "Last calendar week for summer mode
■
7036" is reached.

Operation with external heat generator (not for compact appliances)

If the amount of energy in the ice store is no longer
sufficient, the external heat generator can be switched
on as an alternative energy source. To do this the dual
mode temperature can be recorded via the tempera-
ture sensor in the ice store. The temperature sensor is
switched by "Temperature sensor for dual mode
operation 7038".
Monitoring the absorber circuit
If a heat meter is installed in the absorber circuit and is
connected to the Vitosolic, then "Absorber circuit
monitoring 7037" can be used to start monitoring of
the absorber circuit. If the amount of energy with active
switching of the absorber circuit pump falls below
1 kWh within 6 h, the heat pump control unit displays
the message "96 Ice store absorber circ". In that
case check the absorber circuit (e.g. absorber circuit
pump faulty).
2-stage refrigerant circuit
The heat pump has a refrigerant circuit with 2 com-
pressors connected in parallel but only one electronic
expansion valve.
Required parameter settings
Parameter
"Enable compressor 5000"
"Enable compr stage for tandem opera-
tion 509E"
"Output compressor stage 5030"
"Enable use of compressor stage 5012"
"Enable compr 2 for hydraulic circuit
509F"
(cont.)
[6]
During times of low heat or cooling demand, only one
compressor is in operation. If the heat or cooling
demand increases, the 2nd compressor also switches
on.
Compressor 1
"1"
"1"
"3" (both compressors enabled)
Value according to rated heating output: See type plate.
"0" to "15"
For settings in the bit field: See
page 194.
—
Function description
Compressor 2
"2"
—
"0" to "15"
For settings in the bit field:
See page 194.
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