Electrical Connection; Cut-Out Electrical Supplier; Dhw Frost Protection; Heating Frost Protection - OEG 650 001 330 Installation And Operating Instruction

58
3.4

Electrical connection

3.4.1

Cut-out electrical supplier

3.5

DHW frost protection

3.6

Heating frost protection

GB
Connection of electrical booster heater
Separate circuit breakers must be installed for all installations.
E1L
A2 A1
E1N
L
N
E1: Electrical booster heater for domestic hot
water (DHW)
A cut-out by the electrical supplier can be implemented via the "ON/OFF" terminals.
If the temperature in the DHW storage tank falls below +5 °C, the system will switch to
DHW frost protection automatically.
If the temperature rises above +15 °C or the circulation pump has worked longer than 30
minutes, DHW frost protection will be deactivated automatically.
If the heating flow or return temperature of the heat pump falls below the value of
parameter P25, heating frost protection will be activated. Depending on the outside air
temperature, one of the following actions will be started:
• At an outdoor temperature of ≤ +15 °C: compressor for heating will start
• At an outdoor temperature of ≥ +15 °C: water pumps C1 and C2 will start
If the heating flow temperature is higher than +10 °C or the circulation pump has worked
longer than 30 minutes, heating frost protection is deactivated.
If the heating flow or return temperature falls below +10 °C and the circulation pump has
worked longer than 30 minutes, the time calculation starts and records how often the
de-activating status occurs. If it occurs twice within 90 minutes, error code E24 appears.
In climate zones with the danger of frost, it is recommended to add glycol-based
antifreeze to the heating water to protect the heat pump. The reliability of frost
protection increases with a rising glycol content in the heating water. In most climate
zones, the efficiency of the heat pump is only marginally impaired by the use of antifreeze.
The graph shows the relationship of reliable frost protection, glycol content and efficiency.
Depending on the antifreeze used, the specified values can deviate. Please observe the
manufacturer's specifications.
Multi-functional DC inverter air/water heat pump
E2L
A2 A1
E2N
L
N
E2: Electrical booster heater for heating water