oventrop Regtronic RQ Installation And Operating Instructions For The Specialised Installer page 20

Heat exchanger mode
Main menu / Hot water / HX start
Adjustment channel Description
HX mode Heat exchanger mode
Cold start Cold start pump runtime
∆T cold start
Cold start temperature difference
Cold start pump speed
Speed cold
HX set value Heat exchanger set temperature
HX set hyst Heat exchanger hysteresis
Speed hot mode
Speed hot
Timer Timer
Days of the week Day selection
Timer Time frame adjustment
back
Sliding set value
Main menu / Hot water / Sliding set value
Adjustment channel Description
Activation of the function
T-HW set sl.
∆T sliding
Temperature difference
back
20
The HX start sub-menu can be used to adjust all
values for the operation of the heat exchanger.
3 heat exchanger modes are available. They enable
different temperature conditions of the heat ex-
changer at the beginning of a draw-off.
Adjustment range / selection Factory setting
Cold, Hot, Time
10 ... 600 s
-30 ... +30 K
30 ... 100 %
10 ... 60 °C
1 ... 10 K
15 ... 100 %
-
All days, Monday ... Sunday,
Continue
00:00 ... 23:59
The Sliding set value function can be used for
adapting the hot water set temperature in the case of
insuffi cient store temperature. The function prevents
the primary pump from being run at 100 %, which
would unnecessarily mix the store contents and thus
destroy the store stratifi cation.
If the store fl ow temperature falls below the limit
value T -HWset + ∆T sliding, T-HW set will be
Adjustment range / selection Factory setting
Yes, No
2.0 ... 20.0 K
HX mode Cold
The primary pump is only activated when there is a
draw-off (cold start). At fi rst, the pump is run at the
adjusted Speed cold. As soon as the Cold start
time has elapsed or the adjustable temperature dif-
ference ∆T cold start (reference sensors are S1
and S2) is exceeded, the cold start phase is com-
pleted. The controller switches to the pump speed
calculated.
HX mode Hot
Cold
The heat exchanger is permanently kept at the adjust-
120 s
ed HX set temperature (hot start). For that purpose,
-5 K
the temperature at the store fl ow sensor is meas-
ured. If the temperature at this sensor falls below the
100 %
adjusted HX set value, the primary pump is run at the
40 °C
adjusted Speed hot. When HX set + HX set hyst
2 K
is exceeded, the primary pump is switched off.
25 %
HX mode Time
-
This mode is a combination of the other two modes.
With the timer, different days and time frames can
-
be adjusted. Within the time frames, the HX mode
-
Hot is active, outside the time frames, the HX
mode Cold is active.
decreased accordingly. The primary pump speed is
then controlled such that the new set value is per-
manently kept.
When the HX mode Cold is activated, the sliding set
value adaptation will start only if the cold start phase
has been completed.
T-HW set will only be decreased down to the lower
limit temperature of 20 °C.
Note:
In some systems it is recommended to
No
place the fl ow sensor S1 into the upper
5.0 K
store zone or not to activate the sliding
set value mode respectively.