Danfoss DHP-A Service Instructions

8 Installing accessories/additional functions
DANGER! Hazardous electrical voltage! The terminal blocks are live and can be highly dangerous due to
the risk of electric shock. All power supplies must be isolated before electrical installation is started.
8.1 Room sensor
The room temperature sensor has a temperature sensor that provides a further value that the control system can
use when calculating the supply temperature. The impact of the room sensor in the calculation can be set in the
menu HEAT CURVE -> ROOM FACTOR. Default setting for ROOM FACTOR is 2 but can be adjusted from 0 (no
impact) 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 on
whether 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 different
settings for ROOM FACTOR.
In the event of a heating deficit:
Table 6. Heating deficit
ROOM FACTOR Desired room tempera-
ture, °C
Actual room temperature,
°C
Set point for supply line, °C
0 20 18 40
1 20 18 42
2 20 18 44
3 20 18 46
4 20 18 48
In the event of a surplus of heat the conditions are the opposite:
Table 7. Heat surplus
ROOM FACTOR Desired room tempera-
ture, °C
Actual room temperature,
°C
Set point for supply line, °C
0 20 22 40
1 20 22 38
2 20 22 36
3 20 22 34
4 20 22 32
Note! 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 relatively
constant:
•
Centrally located in the house
•
At eye level
•
Not in direct sunlight
•
Not in a draft
Service instructions VMGFC302 – 25

Danfoss DHP-A Specifications

General

Brand	Danfoss
Model	DHP-A
Category	Heat Pump
Language	English