Appendix
6
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 28C • 01/2004
61
Subject to modifications resulting from technical improvements!
Boulter Buderus Ltd. • http://www.boulter-boilers.com
6
Appendix
6.1
Technical specifications
Dimensions
Unit
600 Series wall-mounted condensing gas boiler
600 - 28C
Type of gas supply as established in
EN 437 (GB/IE)
GB/IE II
2H3P
20 mbar
(natural gas
H
and propane)
Rated thermal load for heating
Rated thermal load for preparing hot water
kW
kW
5.7 - 23.0
5.7 - 28.5
Rated heating capacity for system temperature
(modulating from 30° to 100°)
Heating curve 75/60
°
C
Heating curve 40/30
°
C
kW
kW
5.3 - 22.0
6.0 - 24.0
Seasonal efficiency (SEDBUK) for natural gas
for propane
%
%
90.3
92.3
Max. gas rate for heating
Max. gas rate preparing hot water
m
3
/h
m
3
/h
2.43
3.02
Central heating installation
Heating water temperature
°C
30 - 80
∆
T at residual head of 200 mbar
K
<20
Max. operating pressure of boiler
bar
3.0
Volume heat exchanger heating circuit
l
1.0
Pump over run time
min
h
0 - 60
24
Expansion vessel
Capacity of expansion vessel
l
12
Admission pressure of expansion vessel
bar
0.75
Hot water tank (type 24C)
Hot water capacity of heat exchanger
l
0.95
Hot water flow at 60 °C (
∆
T = 50 °C)
(
∆
T = 35 °C)
l/min
l/min
7.8
13.0
Adjustable hot water temperature
°C
30 - 60
Minimum connection pressure
bar
0.9
Maximum connection pressure
bar
10
