Viessmann Vitocal 222-G User Manual page 57

Vitocal 200-G
(cont.)
3.4 Vitocal 200-G with one heating circuit without mixer, with DHW heating (optional solar
DHW heating) and natural cooling function with NC-Box with mixer
ID: 4605363_1304_03
Application range
Detached house with one heating circuit and cooling demand. Size the
DHW cylinder in accordance with current standards and require-
ments.
3
Note
The minimum flow rate of heat pump 1 must be safeguarded by sec-
ondary pump 6 and overflow valve oW. The heating line and overflow
valve must be matched up.
Main components
■ Vitocal 200-G with Vitotronic 200, type WO1B
■ Heating circuit distributor with one heating circuit without mixer
■ DHW cylinder
■ Solar thermal system
■ Solar heat exchanger set
■ NC-Box with mixer
Central heating by heat pump
Heat pump 1, primary pump 5 and secondary pump 6 start if the
actual return temperature is lower than the set temperature selected
at control unit 2.
Heat pump 1 supplies heating circuit uP with heat. Control unit 2
regulates the flow temperature of heating circuit uP. Subject to
demand, secondary pump 6 delivers heating water to heating circuit
uP, or via circulation pump for cylinder heating 7 to DHW cylinder
eP.
Once the actual return temperature value at the return temperature
sensor exceeds the set temperature selected at control unit 2, heat
pump 1 and primary pump qT are switched off.
Required parameter settings
ID: 4605363_1304_03
Parameter
7000
7100
7101
7103
7104
7111
7A00
2003
ID: 4605363_1304_03
Vitosolic 100, type SD1
Parameter
ANL
"RPM"
VIESMANN
62
Value Function
2 With heating circuit A1/HC1, DHW cylinder (delivered condition)
2 Natural cooling NC-Box with mixer
1 Cooling via heating circuit A1/HC1
180 Min. flow temperature, cooling
50 Influence room temperature hook-up cooling circuit
4 Cooling curve slope
1 With Vitosolic 100, type SD1
1 Vitotrol 200A remote control activated for heating circuit A1/HC1
Value Function
2 System version
"0" Pump with electronic speed control (delivered condition)
"1" Standard solar circuit pump without separate variable speed control - speed controlled by
pulse pack control
"2" Pump with PWM input (Wilo)
"3" Pump with PWM input (Grundfos)
DHW heating by heat pump
In the delivered condition, DHW heating by heat pump 1 is given
priority over heating circuit uP and takes precedence at night.
The heat demand is issued via cylinder temperature sensor eW and
control unit 2, which controls circulation pump for cylinder heating
7. Heat pump 1 raises the flow temperature to the value required
for DHW heating.
DHW reheating can be provided by an electric booster heater (e.g.
immersion heater inside the DHW cylinder).
If the set cylinder temperature selected at control unit 2 is exceeded,
the control unit switches circulation pump for cylinder heating 7 off
and starts secondary pump 6 in the case of heat demand from heat-
ing circuit uP. Heating circuit uP is supplied with heat.
The flow temperature can be raised above 65 °C with instantaneous
heating water heater 4.
Solar DHW heating (option)
Heat pump control unit 2 in Vitocal 200-G can be connected via KM
BUS distributor 8 to a Vitosolic 100 (type SD1) rU to achieve solar
DHW heating.
Circulation pump rE in Solar-Divicon rW starts and DHW cylinder
eP is heated up when the temperature differential between collector
temperature sensor rR and cylinder temperature sensor eQ exceeds
the set value.
The heat pump will be locked out against cylinder heating when the
temperature at cylinder temperature sensor eW in the DHW cylinder
exceeds the set value selected at the control unit.
The solar thermal system heats the cylinder to the set value selected
at solar control unit rU.
Natural cooling function
The building can be cooled with heat pump control unit 2 in conjunc-
tion with NC-Box iP (accessories). The natural cooling function is
enabled by control unit 2 as soon as the outside or room temperature
(cooling limit temperature) that can be selected at control unit 2 is
exceeded. Circulation pumps iR and iW in the NC-Box start and 3-
way diverter valve iQ switches to cooling. Heat is now extracted from
the room via heating circuit oP and transferred to the brine circuit via
the plate heat exchanger in the NC-Box. The brine circuit transfers the
heat to the ground via geothermal probe wU. DHW can be heated by
heat pump 1 whilst cooling mode is operational.
System examples