Viessmann PM1 Installation And Service Instructions Manual page 17

Setting parameters
Display
Individual pump type
Wilo
GRUNDFOS
01 Feed pump in multi boiler system
Display
Activation via butterfly valve status
Activation via distribution pump switching
signal
(cont.)
Value
00:0
00:1
00:2
Value
01:0
01:1
Commissioning and adjustment
Explanations
The circulation pump is controlled according to the
following default curve:
%
100
25
10
1.0 3.9
Example of circulation pump with enable contact
Wilo Stratos circulation pumps are controlled accord-
ing to the following curve:
%
100
50
25
3.0 5.3
Circulation pump without enable contact
Grundfos Magna circulation pumps are controlled ac-
cording to the following curve:
%
100
65
30
2.0 4.6
Circulation pump with enable contact
Explanations
As soon as at least one butterfly valve opens, the
feed pump is enabled.
As soon as the distribution pump runs, the feed pump
is enabled.
10.0
V
10.0
V
10.0
V
17