Viessmann VITOPEND 200 Installation And Service Instructions Manual page 66
Gas fired combi boiler
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Coding
Code 2
(cont.)
Coding in the delivered condition
E9:20
Speed of the external
variable speed heating
circuit pump: 20 % of
the maximum speed in
reduced temperature
mode (only for weather‐
compensated control
units)
66
Possible change
E9:0
Speed adjustable from 0
to
to 100 % of maximum
E9:100
speed during operation
with reduced room tem-
perature
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