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Apartment transfer station

CAT-2

The complete solution for every project

The CAT-2 apartment station is designed for modern new-build projects and comprehensive heating renovations. It is designed to provide a high level of heating and domestic hot water comfort. The innovative design has been developed for integration with heat pump and hybrid systems and is designed in accordance with relevant requirements for hygiene, safety and reliable operation.

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

Designed for use 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 and well suited to the construction phase sequence

The preconfigured equipment package simplifies planning and installation and includes selected components such as a differential pressure regulator and summer bypass. 

The system concept supports installation in refurbishment projects by reducing the number of required distribution and connection components

The system design eliminates the need for gas, domestic hot water and circulation pipework within the individual apartments

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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