ecoGEO C Installation and User Manual (Version 1.0)
page 97
Application
•
DHW and heating in houses, small apartment blocks, offices or shops with heating systems pumping
from an intermediate buffer tank.
Operation
In heating mode, the heat pump drives hot water to the buffer tank. The power supplied by the heat pump is
related to the difference between the tank setpoint temperature and the actual temperature of the water in
the tank. The flow rate is adjusted to maintain a constant working temperature difference (5°C by default). The
outlet temperature is not controlled but is in relation to the return temperature from the hot water tank to the
buffer tank.
When there is a demand for DHW, the heat pump stops the production of heating and sends hot water to the
coil in the hot water tank. The temperature and flow rate are controlled to minimize heating time (maximum
accumulation temp 50-55°C). Once a week, the electric heater located in the hot water tank is activated to
raise the temperature to 70°C to prevent possible outbreaks of legionella in the tank.
Additional control elements
Besides the heat pump control equipment you must install the following components.
•
A temperature probe for the buffer tank (see section 5.7).
Configuration
1.
Enter the SERVICE MENU
([Prg]
+
[Esc])
-> INSTALLER CONF. (Enter service password PW1) ->
OPERATING SCHEME -> BUFFER TANK.
