Danfoss DHP-A Service Instructions Manual

Also see for DHP-A: User guide User manual Installation and service instructions User manual Installation and service instructions

Contents

Danfoss DHP-A Service Instructions Manual Manual pdf 27 page image

8 Installing accessories/additional functionsDANGER! Hazardous electrical voltage! The terminal blocks are live and can be highly dangerous due tothe risk of electric shock. All power supplies must be isolated before electrical installation is started.8.1 Room sensorThe room temperature sensor has a temperature sensor that provides a further value that the control system canuse when calculating the supply temperature. The impact of the room sensor in the calculation can be set in themenu HEAT CURVE -> ROOM FACTOR. Default setting for ROOM FACTOR is 2 but can be adjusted from 0 (noimpact) to 4 (large impact).The difference between the desired and actual indoor temperature is multiplied by the set value for ROOM FAC-TOR. The set point on the heating system’s supply line increases or decreases with the result depending onwhether there is a deficit or surplus of heat.The table below shows examples of how the set point for the supply line is affected at CURVE 40 with differentsettings for ROOM FACTOR.In the event of a heating deficit:Table 6. Heating deficitROOM FACTOR Desired room tempera-ture, °CActual room temperature,°CSet point for supply line, °C0 20 18 401 20 18 422 20 18 443 20 18 464 20 18 48In the event of a surplus of heat the conditions are the opposite:Table 7. Heat surplusROOM FACTOR Desired room tempera-ture, °CActual room temperature,°CSet point for supply line, °C0 20 22 401 20 22 382 20 22 363 20 22 344 20 22 32Note! The room sensor is connected to a safety extra-low voltage.1. Install the room temperature sensor in a location in the house where the room temperature is relativelyconstant:• Centrally located in the house• At eye level• Not in direct sunlight• Not in a draftService instructions VMGFC302 – 25