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11
11 Device Information
Device information for air-to-water heat pumps (heating only)
1
Type and order code
LA 20AS
LA 24AS
LA 28AS
2
Design
2.1
Degree of protection according to EN 60 529 for compact devices
and heating components
IP 24
IP 24
IP 24
2.2
Installation location
Outdoors
Outdoors
Outdoors
3
Performance data
3.1
Operating temperature limits:
Heating water flow/return flow
1
°C / °C
1. See operating limits diagram
Up to 55 / above 18
Up to 55 / above 18
Up to 55 / above 18
Air
°C
-20 to +35
-20 to +35
-20 to +35
3.2
Temperature spread of heating water (flow/return flow) at A2 / W35K
7.9
8.4
9.4
3.3
Heat output / COP
at A-7 / W35
2
kW / ---
3
2. This data indicates the size and capacity of the system. For an analysis of the economic and energy efficiency of the system, other parameters, such as, in particular, the defrosting
capacity, the bivalence point and regulation, should also be taken into consideration. The specified values, e.g. A2 / W55, have the following meaning: 2 °C external air temperature
and 55 °C heating water flow temperature.
3. Operation with 1 compressors
7.0 / 2.5
8.9 / 2.6
9.9 / 2.4
4
4. Operation with 2 compressors
12.4 / 2.7
16.1 / 2.7
19.1 / 2.7
at A2 / W35
2
kW / ---
3
9.3 / 3.1
10.9 / 3.0
12.8 / 3.0
4
14.9 / 3.0
19.2 / 3.2
22.3 / 3.0
at A2 / W50
2
kW / ---
3
8.5 / 2.4
9.9 / 2.3
10.8 / 2.0
4
14.2 / 2.3
18.0 / 2.4
21.1 / 2.3
at A7 / W35
2
kW / ---
3
9.8 / 3.2
13.1 / 3.4
14.2 / 3.1
4
16.6 / 3.1
24.8 / 3.6
25.8 / 3.4
at A10 / W35
2
kW / ---
3
10.3 / 3.3
14.1 / 3.5
14.7 / 3.1
4
17.8 / 3.3
26.6 / 3.8
29.1 / 3.6
3.4
Sound power level
dB(A)
64
68
68
3.5
Sound pressure level at a distance of 10 m (air outlet side) dB(A)
37
41
41
3.6
Heating water flow with an internal pressure differential of m³/h / Pa
1.8 / 6500
2.3 / 5900
2.3 / 5900
3.7
Air flow rate
m³/h
5500
8000
8000
3.8
Refrigerant; total filling weight
type / kg
R404A / 3.7
R404A / 4.2
R404A / 4.2
4
Dimensions, connections and weight
4.1
Device dimensions
H x W x L cm
157 x 155 x 85
171 x 168 x 100
171 x 168 x 100
4.2
Device connections to heating system
Inch
G 1 1/4'' external
G 1 1/4'' external
G 1 1/4'' external
4.3
Weight of the transportable unit(s) incl. packing
kg
284
351
355
5
Electrical Connection
5.1
Nominal voltage; fuse protection
V / A
400 / 20 T
400 / 25 T
400 / 25 T
5.2
Nominal power consumption
2
A2 W35
kW
4.9
6.1
7.4
5.3
Starting current with soft starter
A
23
24
25
5.4
Nominal current A2 W35 / cos
ϕ
A / ---
8.8 / 0.8
10.9 / 0.8
13.4 / 0.8
6
Complies with the European safety regulations
5
5. See CE declaration of conformity
5
5
7
Additional model features
7.1
Defrosting
Automatic
Automatic
Automatic
Type of defrosting
Reverse cycle
Reverse cycle
Reverse cycle
Defrosting tray included
Yes (heated)
Yes (heated)
Yes (heated)
7.2
Heating water in device protected against icing
6
6. The heat circulating pump and the heat pump controller must always be ready for operation.
Yes
Yes
Yes
7.3
Performance levels
2
2
2
7.4
Controller internal/external
External
External
External
