32
99B138120x-mub-en | 2014/11 | V05
EN
9.2.4 Comfort function
•
not available for FriwaMini
Preheats the primary side of the heat exchanger in order to accelerate the
starting behaviour of the module. The primary pump is actuated depen-
ding on the flow temperature. When the comfort temperature at the flow
sensor is reached, the function is blocked for 5 minutes in order to avoid a
switching of the pump.
Note
The protection against limescale is deactivated when the heat
exchanger is always warm. Do not activate the comfort function
when there is an increased risk of limescale.
The comfort function controls the operation of the primary pump when
there is no withdrawal and circulation.
The comfort nominal temperature can not be adjusted, it is automatically
calculated on the basis of the current set nominal temperature of the
domestic hot water (THW NOM - 7 K).
In order to avoid a permanent operation of the primary pump because of
a storage tank that is not hot enough, the controller carries out a security
query. If within 100 s after the start of the comfort function the flow tempe
-
rature has not reached the calculated comfort nominal temperature, the
comfort function is blocked for one hour.
The function can only be activated or deactivated.
You will find instructions regarding the adjustment of the time control on
page 33.
Measured value display:
The comfort function is displayed in the status menu. The slow rotation of
the pump segments shows, that the pump is working.
Note
In the cascade operation mode the function has to be activated in the
master controller and in the slave controller. The comfort functions in
the master and slave controller work independent from each other.
Characteristic
min.
max.
Factory
setting
Activation
on, oFF
oFF
Speed control
0%
100%
35%
Time control
on, oFF
oFF
Time window 1 start/end
00:00
23:59
6:00/8:00
Time window 2 start/end
00:00
23:59
12:00/13:30
Time window 3 start/end
00:00
23:59
18:00/20:00
Time control
If a function is to be time controlled then the time control must be activated
and the time windows must be set (
cc
= clock control). In the fig. on the
left the time control is switched on (
on
).
