143
Operation: water/water with intermediate circuit
Type BW
1-stage 301
2-stage 302
A090 A120 A090
A120 A150 A180
A250
Output data
to EN 14511
(W10/W35, 5 K spread)
Rated heating output
kW
125
152 118.8 153.0
198
235
302
Cooling capacity
kW
104.5
128
101 129.0
168
197
252
Power consumption
kW
21
25.6
18.9
25.3
32.1
41
51.8
Coefficient of perform-
ance ε (COP)
5.95
5.93
6.2
6.05
6.10
5.73
5.83
Brine
(intermediate cir-
cuit –5 °C)
Content
l
33.0
42.0
33.0
42.0
55.2
69.0
89.4
Min. flow rate (5 K
spread)
m³/h
26.0
31.0
24.9
31.8
41.0
48.0
62.0
Pressure drop (at min.
flow rate)
mbar
175
175
170
170
195
210
280
Max. flow temperature °C
20
20
20
20
20
20
20
Min. flow temperature
°C
7
7
7
7
7
7
7
Heating water
(secon-
dary circuit)
Content
l
22.7
28.7
22.7
28.7
38.7
53.5
57.1
Min. flow rate (10 K
spread)
m³/
h
10.8
13.1
10.3
13.2
17.1
20.5
26.0
Pressure drop (at min.
flow rate)
mba
r
130
130
130
130
130
130
160
Max. flow temperature °C
60
60
65
65
60
60
60
Note
■ Output data to EN 14511 correspond
to a temperature spread of 3 K at a
brine inlet temperature of 0 °C and
brine outlet of –3 °C.
■ The specified flow rates are rounded
up or down.
■ Operation as water/water heat pump
with intermediate circuit:
If the brine temperature of the inter-
mediate circuit is reduced to 8 °C from
10 °C, the heat pump output is
reduced by approx. 5 %
Information on refrigerant
The EC safety datasheet for R410A can
be obtained from the Technical Services
department of Viessmann Werke.
Specification
Specification type BW 301.A090 to BW 302.A250
(cont.)
5848 164 GB
Service
Summary of Contents for BW 301.A090
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