Operating instructions
Logamatic EMS RC35 programming unit - Subject to technical modifications
45
Operation with the user menu
5 
1. Open the user menu.
2. Select the room temp. correct. option.
3. Setting the Calibration of the room temperature: the “K” on the display stands for the unit 
Kelvin; 1 K corresponds to 1 °C. The factory setting is 0.0 K.
Example: if the thermometer displays a temperature that is 0.5 °C higher than the temperature 
displayed at the programming unit, enter “+0.5 K” as the calibration value.
The result will be displayed immediately as the corrected room temperature.
5.17 Setting the preheating phase for a Loganova heat pump with gas 
booster heater
You can use GWP preheat phase to set a preheating phase for a heat pump with gas booster 
heater (the Loganova heat pump)
1)
. This setting is not relevant for alternative equipment.
During the preheating phase, the heat pump unit with gas booster heater preheats the heating 
system without a peak load boiler. Generally, the permanent operation of the heat pump raises the 
overall efficiency and saves more energy than in room temperature reduction mode. We therefore 
recommend setting a preheating phase. 
1. Open the user menu.
2. Select GWP preheat phase.
3. Set the preheating phase: set the required duration (00:00 to 16:30 hours:minutes).
The preheating phase commences by the set time before the day mode of the first heating circuit 
begins.
A thermometer may indicate temperature fluctuations more slowly or rapidly than the 
programming unit.
B Therefore, never calibrate the programming unit during phases when your heating 
system is cooling down or heating up.
1) This function depends on the boiler used.
You will achieve the highest efficiency if the heat pump with gas booster heater 
operates constantly. For this, set the preheating phase so it is longer than the night 
mode period of the current switching program. 










