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Overview of benefits

The CRK collectors meet the requirements set for the Blue Angel certificate of environmental excellence according to RAL UZ 73

Powerful: High performance on the smallest of footprints; high yields particularly during spring and autumn; especially suitable for a combination of DHW heating and central heating backup

Certified by Solar Keymark

Durable: Direct flow collector working on the principle of a Thermos flask; enables a life-lasting vacuum for high thermal insulation

Constant: Absorber with highly selective coating on the outside of the inner glass tube in a high-vacuum casing – protected against environmental influences, no degradation, consistently high efficiency

Flexible: Modular layouts for ideal matching to the space available on the roof

Statutory warranty: 5 years

Specifications

CRK-12
Model type
CRK-12
General data
Connections (MS locking ring fitting)
mm
15
Installation angle
15° to 75°
Heat transfer medium
ANRO LS (undiluted)
Solar Keymark registration no.
011-7S321 R
Absorption (energy absorption)
%
> 93.5
Emissions
%
≤ 6
Optical efficiency *
%
64.2
Heat loss coefficient a1 *
W/(m2 K)
0.885
Heat loss coefficient a2 *
W/(m2 K2)
1E-3
Max. stagnation temperature
°C
272
Angle of incidence correction factor K * Iongitudinal / transversal
%
89 / 99
Effective thermal capacity
Coeff in kJ/ (m2 K)
8.416
Max. operating pressure
bar
10
Pressure drop (at 15 l/h x m² and 40°C)
mbar
5
Number of vacuum tubes per collector
Units
12
Glass tube diameter
mm
47 / 33 / 1.6
Gross surface area
2.29
Aperture area
2
Capacity
litres
1.74
Dimensions
Length
mm
1640
Width
mm
1390
Depth
mm
100
Weights
Weight (empty)
kg
32.7

Specifications

CRK-12
  • CRK-12

    General data
    Connections (MS locking ring fitting) (mm)
    15
    Installation angle
    15° to 75°
    Heat transfer medium
    ANRO LS (undiluted)
    Solar Keymark registration no.
    011-7S321 R
    Absorption (energy absorption) (%)
    > 93.5
    Emissions (%)
    ≤ 6
    Optical efficiency * (%)
    64.2
    Heat loss coefficient a1 * (W/(m2 K))
    0.885
    Heat loss coefficient a2 * (W/(m2 K2))
    1E-3
    Max. stagnation temperature (°C)
    272
    Angle of incidence correction factor K * Iongitudinal / transversal (%)
    89 / 99
    Effective thermal capacity (Coeff in kJ/ (m2 K))
    8.416
    Max. operating pressure (bar)
    10
    Pressure drop (at 15 l/h x m² and 40°C) (mbar)
    5
    Number of vacuum tubes per collector (Units)
    12
    Glass tube diameter (mm)
    47 / 33 / 1.6
    Gross surface area (m²)
    2.29
    Aperture area (m²)
    2
    Capacity (litres)
    1.74
    Dimensions
    Length (mm)
    1640
    Width (mm)
    1390
    Depth (mm)
    100
    Weights
    Weight (empty) (kg)
    32.7