3 Technical data
8 Installation and maintenance instructions MicraCom 0020289288_02
Technical data – Heating
24c-AS/1 28c-AS/1
Maximum heating flow temperature (factory setting – D.71)
75 ℃ 75 ℃
Maximum flow temperature adjustment range
30 to 75 ℃ 30 to 75 ℃
Maximum operating pressure (MWP)
0.3 MPa
(3.0 bar)
0.3 MPa
(3.0 bar)
Nominal water flow (ΔT = 20 K)
788 l/h 1,029 l/h
Approximate value for the condensate volume during nominal load operation
(pH value between 3.5 and 4.0) at 50/30 °C
1.89 l/h 2.46 l/h
Remaining pump head (at nominal circulation water volume)
0.027 MPa
(0.270 bar)
0.017 MPa
(0.170 bar)
Contents of the heating expansion vessel
8 l 8 l
Technical data – Domestic hot water
24c-AS/1 28c-AS/1
Minimum water flow
1.7 l/min 1.7 l/min
Specific flow rate D (ΔT = 30 K)
11.5 l/min 13.4 l/min
Specific flow rate D (ΔT = 35 K)
9.9 l/min 11.5 l/min
Permissible operating pressure
0.03 to 1 MPa
(0.30 to 10 bar)
0.03 to 1 MPa
(0.30 to 10 bar)
Recommended supply pressure
0.3 MPa
(3.0 bar)
0.3 MPa
(3.0 bar)
Hot water comfort in accordance with the standard EN 13203
** **
Flow rate limiter for cold water
8.0 l/min 10.0 l/min
Domestic hot water output temperature range
35 to 55 ℃ 35 to 55 ℃
Technical data – Electrics
24c-AS/1 28c-AS/1
Electrical connection
230 V/50 Hz 230 V/50 Hz
Permissible connected voltage
195 to 253 V 195 to 253 V
Built-in fuse (slow-blow)
T2/2 A, 250 V T2/2 A, 250 V
Maximum electrical power consumption
90 W 90 W
Standby electrical power consumption
1.7 W 1.7 W
IP rating
IPX5 IPX5