Initial start-up
2
26
Installation and servicing instructions condensing gas boiler 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • edition 02/2006
Subject to modifications resulting from technical improvements !
Buderus • http://buderus-domestic.co.uk
With external storage-type water heater:
set the hot water temperature
z
Use the controller (fig. 31, item 3) to set the desired
domestic hot water temperature in accordance with table 7.
Setting the heating capacity
z
Open the cover of second control level (fig. 31, item 7).
z
Set the heating capacity in accordance with the required
heat demand (table 8) on the controller (fig. 31, item 6).
Take into account the appropriate losses caused by the
flue gas system (table 9).
Setting the pump over-run time
z
Move the switch
(
(fig. 31, item
4) to position "
1
".
Pump over-run time 4 minutes.
Move the switch
(
to position "
2
" when the system is
controlled in accordance with the room temperature and if
parts of the system outside the detection area of the room
temperature controller are at risk of freezing (e.g. radiators
in the garage).
Pump over-run time 24 hours (constant operation).
Controller
position
Domestic hot water temperature of
external reservoir in °C
1
27
2
31
3
34
4
38
5
41
6
45
7
49
8
52
9
56
10
60
Table 7
Domestic hot water temperature
Con-
troller
position
Heating capacity in kW (±5 %)
800-24
24T25
800-29
29T25
800-43
800-60
1
6.6
8.4
12.1
22.0
2
8.4
10.8
15.2
25.3
3
10.2
13.0
18.3
29.7
4
11.9
15.2
21.4
33.5
5
13.6
17.5
24.5
37.3
6
15.3
19.7
27.7
41.2
7
17.0
21.9
30.8
45.0
8
18.7
24.1
35.9
48.8
9
20.4
26.3
37.0
52.7
10
22.0
28.0
40.2
56.5
Table 8
Heating capacity
Pressure loss of
flue gas system
in Pa
Available portion of
maximum capacity
in %
800-24/29/43
800-60
20
98.5
98.5
30
97.8
98.0
40
97.1
97.4
50
96.4
96.9
60
95.6
96.3
70
94.8
95.8
80
–
95.2
90
–
94.7
Table 9
Capacity losses
