Additional functions
50
After-running time
During the start phase, the pumps may repeatedly switch on and off for a long time, espe-
cially with solar and heating systems with long hydraulic system lines. This response can be
reduced by using a speed control or increasing the pump after-run time. After access of the
sub menu
PnL
the display for the after-running time for output 1 is visible:
(Setting range: 10 sec to 9 min; 0 = no after-running time)
E.g.:
t1.3
- after-running time of output 1 is 30 seconds.
E.g.:
t13
- after-running time of output 1 is 3 minutes.
A short tap at the yellow key “
Eingabe
” switches to the after-running time of output 2. Set-
ting ex works for all outputs is 0 (t10, t20, t30, t40).
Hystereses
Hysteresis means the difference between switch-on and switch-off tem-
perature. I.e. a thermostat with hysteresis 10K, which is set to 70°C, switches off at 70°C and
switches on again at 60°C. Hystereses in UVR 64 are not constant, but they change accord-
ing to the temperature and can be set from 1 to 9 K per 64°C.
H13
– hysteresis of switch function 1 (diff1) is 3K per 64°C.
ew
= H13
H25
- hysteresis of switch function 2 (diff2) is 5K per 64°C.
ew
= H23
H3
…diff3
H4
…diff4
H5
…min1
H6
…min2
H7
…max1
H8
..max2
ew
= H3 to H8 : 3K/64°C
H93
- hysteresis of switch function 9 (max3) is 3K per 64°C.
ew
= H93
HA5
- hysteresis of switch function 10 = A (max4) is 5K per 64°C.
ew
= HA3
The advantage of hystereses change according to the temperature is, that different con-
sumers resp. tanks can be used with same settings. Thus a swimming pool with maximum
temperature of 30°C gets a lower hysteresis than a buffer with maximum temperature of
90°C.
Example:
Maximum for pool is set to 30°C, hysteresis = 3K/64°C (=ex works).
The hysteresis at 30°C results to approximately the half – therefore ca. 1.5K. Feed is blocked
at 30°C and is enabled at approx. 28.5°C.
Hystereses of difference values diff 1 to 4 refer to the colder sensor. E.g. if the colder sensor
has 64°C, the output will be switched on exceeding the difference
diff
+ hysteresis 3K and
switched off falling below the difference
diff
.