Technische Alternative UVR 16x2

Heating circuit control
67
Parameters in Heat curve sub-menu
Control
Available for selection: Outside temperature mode or Fixed
value mode
Heat curve
(shown only for Outside
temperature mode)
Available for selection: Temperature or Slope
Room influence
The room temperature is factored xx % into the flow calculation
(non-linear influence). Setting range: 0 - 90 %.
The room influence is active in Fixed value mode as well.
Start excess
The preceding OFF time of the heating circuit pump leads to a
boost in the flow temperature (to no more than T.flow max.) which
fades out over time.
Setting range: 0 – 20 %  for detailed explanation see below
T.flow +10 °C (shown only
for Temperature heat curve)
Required flow temperature at +10 °C outside temperature
T.flow -20 °C
(shown only for
Temperature heat curve)
Required flow temperature at -20 °C outside temperature
Slope
(shown only for Slope heat
curve)
Specifies the slope
T.flow setback (shown only
for Fixed value mode)
Required flow temperature in setback mode
T.flow standard (shown only
for Fixed value mode)
Required flow temperature in standard mode
Level
Parallel shift of the selected heat curve by applying a fixed offset
value (active in Fixed value mode as well). The calculated set flow
temperature will be increased or decreased by this amount.
T.flow max.
Maximum flow temperature (the flow must not rise above this limit)
T.flow min.
Minimum flow temperature for every operating mode except
Standby (the flow must not drop below this limit)
T.flow min. standard
Minimum flow temperature in standard mode
➢ Start excess
The start excess (SE) is calculated according to the following formula:
𝐓. 𝐟𝐥𝐨𝐰. 𝐬𝐞𝐭
𝐒𝐄
= 𝐓. 𝐟𝐥𝐨𝐰. 𝐬𝐞𝐭 + (𝐓. 𝐟𝐥𝐨𝐰. 𝐬𝐞𝐭 ×
𝐒𝐄
𝟏𝟎𝟎
×
𝐦𝐞𝐭𝐞𝐫
𝟑𝟎
)
The counter goes up by 1 for every 20 minutes that the heating circuit pump is switched
off, and drops by 1 every minute that the pump is switched on until it reaches 0.
The maximum counter reading is 255. It is thus reached after 85 hours of OFF time (= 255/3
hours or about 3.5 days). The maximum fade-out time is 4.25 hours (= 255 minutes). The
set excess in % is effective after an OFF time of 10 hours (= 30 x 20 minutes).
Example: T.flow.set = 40 °C, Start excess = 10 %, OFF time 8 hours
The excess is initially +3.2 K and falls steadily to zero within 24 minutes.
➢ If T.flow min. standard is set lower than T.flow min., the higher value of T.flow min. will apply
in standard mode anyway.