Installer_manual_OEM_Vaillant_PROTO_3_GB - 06/11 - Vaillant
- 45 -
Determination of the bivalence point
A
B
0
2
-20
-15
-10
-5
0
5
10
15
20
4
6
8
10
12
14
16
T1
6
T0
1
4
3
5
2
Legend
1 Calorific power determined for the regional reference temperature
2 bivalence point
3 Power graph for the heat pump
4 Limit temperature for heating
5 Calorific requirements
6 Regional reference minimum temperature
T0 Limit exterior temperature
T1 Exterior temperature bivalence point (parameter 150)
A Heating power (kW)
b Exterior temperature (°C)
On the graph of power curves for the heat pumps:
•
Trace the straight line showing calorific power (5) with the
points 1 (10kW for -8°C) and 4 (heating limit 20°C).
•
At the intersection of curves (3) and (5), locate the bivalence
point (2) to obtain the value of the parameter (T1).
Settings for the command unit
-
T0 (parameter 148) = limit exterior temperature for the heat
pump to function = -10°C
-
T1 (parameter 150) = exterior temperature for the bivalence
point = -3°C
16 User information
At the end of the installation, the installer must:
-
explain the operation of the appliance and its safety devices to
the user, if necessary provide a demonstration and answer any
questions;
-
hand over to the user all the required documentation,
-
fill in the documents where necessary;
-
advise the user of the precautions necessary to prevent
damage to the system, appliance and the building;
-
remind the user to service the appliance annually.
-
The user shall not interfere with or adjust sealed components.
-
All servicing must be carried out by a competent person
approved at the time by the Health and Safety Executive.
INSTALLATION