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Apartment transfer station

CAT-2

The complete solution for every project

The new CAT-2 apartment station is an excellent choice for modern new-build projects or comprehensive heating renovations. The new CAT-2 apartment station is an excellent choice for modern new-build projects or comprehensive heating renovations. Thanks to its individual adjustment options, it guarantees maximum heating and hot water comfort. The innovative design is specially engineered to work with heat pump or hybrid systems and meets the highest standards in terms of hygiene, safety and reliability – a genuine quality product ‘Made in Germany’.

CAT-237
CAT-255
CAT-263

The variants for radiators and mixed heating circuits are available in power ratings of 37, 55 and 63 kW. The variants for radiators and mixed heating circuits are available in power ratings of 37, 55 and 63 kW. As a standard solution, 12 basic variants are available. They are individually assembled on a base plate in a modular system and installed in a three-part cabinet that is only 11 cm deep. This is suitable for both flush-mounted and surface-mounted installation. 

  • CAT-2 HT version for high-temperature circuits
  • CAT-2 LT version with mixer circuit for low-temperature heating circuits

What do you want to know?

Advantages at a glance

Installation is quick and easy: as the heating circuit distributors are pre-assembled, only the remaining accessories need to be connected and wired on site, for example the E-module (instantaneous water heater set), the 3/4-pipe system, the circulation set or the connection set for a bathroom radiator.

Planning and installation advantages

Perfectly compatible with heat pumps

Versions with large, highly efficient heat exchangers: CAT-2-63-HP

Instantaneous water heater as an accessory: E-module as a 4-wire system accessory

Fast, convenient electronic control

Display as standard: error display, time control (in accordance with GEG), screed heating programme, easy adjustment

Modular design: individual & perfected for the construction phase sequence

Carefree solution thanks to preselected equipment with differential pressure regulator, summer bypass, and much more.

Quick, cost-effective installation during renovation

Low installation costs: no gas, hot water or circulation pipes to the flats

Legal certainty in accordance with DVGW worksheet 551 and the Drinking Water Ordinance

Specifications

Output (VL prim. 65°C, DHW 10/45°C)
(kW)
CAT-2 37
CAT-2 55
CAT-2 63
Max. hot water flow rate
l/min
15,2
22,6
25,9
Heating output
kW
10
10
15
Max. primary volume flow
l/min
12,7
16,0
18,0
Minimum primary supply pressure
kPa
36
36
44
Pressure loss Wolf heat meter (WMZ) in the primary circuit (take pressure loss into account when using WMZ)
Kpa
15
15
15
Primary flow requirement for secondary circuit at 20°C spread
l/min
7,2
7,2
10,8
Secondary circuit pump
delivery head
6m
6m
6m
Connection dimension
IG
3/4"
3/4"
3/4"
Max. torque union nut G 3/4’"
Nm
35
35
35
Max. torque union nut G 1’"
Nm
40
40
40
Max. torque union nut plate heat exchanger
Nm
11
11
11
Variant CAT-2 37
Drinking water temperature
°C
10/45
10/45
10/50
10/50
Primary HTG
VL-°C
65,0
50,0
65,0
55,0
Primary HTG
RL-°C
16,8
24,0
16,5
20,3
Primary HTG
l/min
11,1
12,7
11,9
12,7
Secondary DHW
l/min
15,2
9,3
13,3
12,5
Power
KW
37,0
22,6
37,0
30,4
Variant CAT-2 55
Drinking water temperature
°C
10/45
10/45
10/45
10/50
10/50
Primary HTG
VL-°C
65,0
50,0
47,0
65,0
55,0
Primary HTG
RL-°C
15,3
21,7
25,9
17,5
23,5
Primary HTG
l/min
16,0
16,0
16,0
16,0
16,0
Secondary DHW
l/min
22,6
12,9
9,6
9,6
12,5
Power
KW
55,0
31,3
23,3
23,3
34,47
Variant CAT-2 63
Drinking water temperature
°C
10/45
10/45
10/45
10/50
10/50
Primary HTG
VL-°C
65,0
50,0
47
65,0
55,0
Primary HTG
RL-°C
14,4
20,8
25,0
16,7
22,6
Primary HTG
l/min
18,0
18,0
18,0
18,0
18,0
Secondary DHW
l/min
25,9
15,0
11,3
21,5
14,5
Power
KW
63,1
36,6
27,5
59,7
40,2

Specifications

  • (kW)

  • CAT-2 37

  • CAT-2 55

  • CAT-2 63

    Max. hot water flow rate
    l/min
    15,2
    22,6
    25,9
    Heating output
    kW
    10
    10
    15
    Max. primary volume flow
    l/min
    12,7
    16,0
    18,0
    Minimum primary supply pressure
    kPa
    36
    36
    44
    Pressure loss Wolf heat meter (WMZ) in the primary circuit (take pressure loss into account when using WMZ)
    Kpa
    15
    15
    15
    Primary flow requirement for secondary circuit at 20°C spread
    l/min
    7,2
    7,2
    10,8
    Secondary circuit pump
    delivery head
    6m
    6m
    6m
    Connection dimension
    IG
    3/4"
    3/4"
    3/4"
    Max. torque union nut G 3/4’"
    Nm
    35
    35
    35
    Max. torque union nut G 1’"
    Nm
    40
    40
    40
    Max. torque union nut plate heat exchanger
    Nm
    11
    11
    11
    Variant CAT-2 37
    Drinking water temperature
    °C
    10/45
    10/45
    10/50
    10/50
    Primary HTG
    VL-°C
    65,0
    50,0
    65,0
    55,0
    Primary HTG
    RL-°C
    16,8
    24,0
    16,5
    20,3
    Primary HTG
    l/min
    11,1
    12,7
    11,9
    12,7
    Secondary DHW
    l/min
    15,2
    9,3
    13,3
    12,5
    Power
    KW
    37,0
    22,6
    37,0
    30,4
    Variant CAT-2 55
    Drinking water temperature
    °C
    10/45
    10/45
    10/45
    10/50
    10/50
    Primary HTG
    VL-°C
    65,0
    50,0
    47,0
    65,0
    55,0
    Primary HTG
    RL-°C
    15,3
    21,7
    25,9
    17,5
    23,5
    Primary HTG
    l/min
    16,0
    16,0
    16,0
    16,0
    16,0
    Secondary DHW
    l/min
    22,6
    12,9
    9,6
    9,6
    12,5
    Power
    KW
    55,0
    31,3
    23,3
    23,3
    34,47
    Variant CAT-2 63
    Drinking water temperature
    °C
    10/45
    10/45
    10/45
    10/50
    10/50
    Primary HTG
    VL-°C
    65,0
    50,0
    47
    65,0
    55,0
    Primary HTG
    RL-°C
    14,4
    20,8
    25,0
    16,7
    22,6
    Primary HTG
    l/min
    18,0
    18,0
    18,0
    18,0
    18,0
    Secondary DHW
    l/min
    25,9
    15,0
    11,3
    21,5
    14,5
    Power
    KW
    63,1
    36,6
    27,5
    59,7
    40,2
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    Accessories

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    EPP insulation cover

    Cover for thermal insulation of the front of the CAT-2 home station

    • Depth of station with cover: 110 mm
    • EPP < 0.040 W/mK
    • Fire protection class: B2 according to DIN 4102
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    Circulation set

    Set for installation in the CAT-2 station as an extension for drinking water circulation.
    Consisting of:

    • Circulation pump with power consumption of 3-5 watts
    • Check valve
    • Tubing
    • Timer function via CAT-2 control as standard
    • Easy installation via plug connection

     

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    E-module incl. connection set

    Expansion set for CAT-2 for electric reheating of hot water. For increasing the efficiency of the heat pump system by reducing the flow temperature. Patented system for reheating using an electric instantaneous water heater.
    Consisting of:

    • Electric instantaneous water heater 13.5 kW, 400V
    • Piping to the station
    • Installation material

    The hot water ball valve on the ball valve rail is reused. The holder in the cabinet is prepared.

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    3-/4-wire set

    Accessory set for CAT-2-HT for expanding the station from a 2-wire to a 4-wire system. In combination with heating circuit distributors. For operation with different temperature sources between the low-temperature circuit and the high-temperature circuit.

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