STIEBEL ELTRON WPF 5 basic - Page 70

INSTALLATION
Specication
70 | WPF basic www.stiebel-eltron.com
WPF 5 S basic WPF 7 S basic WPF 10 S basic
Water quality requirements
Water hardness °dH ≤3 ≤3 ≤3
pH value (with aluminium fittings) 8.0-8.5 8.0-8.5 8.0-8.5
pH value (without aluminium fittings) 8.0-10.0 8.0-10.0 8.0-10.0
Chloride mg/l <30 <30 <30
Conductivity (softening) μS/cm <1000 <1000 <1000
Conductivity (desalination) μS/cm 20-100 20-100 20-100
Oxygen 8-12 weeks after filling (desalination) mg/l <0.1 <0.1 <0.1
Oxygen 8-12 weeks after filling (softening) mg/l <0.02 <0.02 <0.02
Heat transfer medium requirements on the heat source side
Ethylene glycol concentration, geothermal probe Vol.-% 25 25 25
Ethylene glycol concentration, geothermal collector Vol.-% 33 33 33
Values
Nominal design heating system flow rate at B0/W35 and 7K m³/h 0.71 0.96 1.22
Min. heating flow rate m³/h 0.5 0.67 0.85
Heating flow rate (EN 14511) for A7/W35, B0/W35 and 5 k m³/h 1 1.34 1.71
Flow rate on heat source side m³/h 1.4 1.9 2.2
Internal volume on the heating side l 2.4 2.8 3.4
Internal volume on the source side l 2.9 3.5 4.1
Available external pressure differential, heating system hPa 350 350 260
Pressure differential on the heat source side hPa 100 110 120
15.16 Data table WPMiw
Electrical connection 1/N/PE ~ 230 V 50Hz
Power consumption VA 8
Relay breaking capacity A 2
IP rating IP1XB
Protection class II
Permissible ambient temperature during operation °C 0-50
Permissible ambient temperature during storage °C -30-60
Clock power reserve, day h >10
Sensor resistances, test resistance Ω 2000
Communication system RS232 (optical), CAN
Max. breaking capacity of relay output, buffer charging
pump
A 2 (1.5)
Max. breaking capacity of relay output, heating circuit
pump
A 2 (1.5)
Max. breaking capacity of relay output, mixer circuit
pump
A 2 (1.5)
Max. breaking capacity of relay output, DHW charging
pump
A 2 (1.5)
Max. breaking capacity of relay output, DHW circulation
pump
A 2 (1.5)
Max. breaking capacity of relay output, source pump A 2 (1.5)
Max. relay output breaking capacity 2nd heat generator
contact
A 2 (1.5)
Max. breaking capacity of relay output, mixer A 2 (1.5)
Max. total breaking capacity of all relay outputs A 10 (8)