Viessmann SCU224 User Manual page 25

SCU224
Adjustment Channels
Channel Description
Arr x System
DT O x Switch-on temperature difference
DT F x Switch-off temperature difference
DT S x Nominal temperature difference
RIS x Rise control R1
n1MN x Minimum pump speed R1
S MX x Maximum tank temperature
n2MN s Minimum pump speed R2
Emergency temperature collector
EM x
Emergency temperature collector if ODB is activated:
OCC x Option collector cooling
CMX x* Maximum collector temperature
OSYC x Option system cooling
DTCO x* Cooling switch-on temperature difference
DTCF x* Cooling switch-off temperature difference
OSTC x Option tank cooling
OHOL x* Option holiday cooling
THOL x* Holiday cooling temperature
OCN x Option minimum limitation
CMN x* Minimum collector temperature
OCF x Option antifreeze
CFR x* Antifreeze temperature
O TC x Option tube collector
TCST x* OTC starting time
TCEN x* OTC ending time
TCRU x* OTC runtime
TCIN x* OTC standstill interval
DT3O s Switch-on temperature difference 3
DT3F s Switch-off temperature difference 3
DT3S s Nominal temperature difference 3
RIS3 s Rise control R2
MX3O s Switch-on treshold for maximum temperature
MX3F s Switch-off treshold for maximum temperature
MN3O s Switch-on treshold for minimum temperature
MN3F s Switch-off treshold for minimum temperature
ODB x Drainback option
tDTO x* ODB switch-on condition - time period
tFLL x* ODB filling time
tSTB x* ODB stabilization time
MAN1 x Manual operation R1
MAN2 x Manual operation R2
LANG x Language
UNIT x Temperature unit
RESE x Reset - back to factory defaults
W0050100 Version number
Legend:
Symbol
x Channel is available
x* Channel is available if the corresponding option is activated.
s Channel is specifically available in this system layout
Specification
Factory setting Page
8 39
12.0 °Ra [6.0 K] 39
8.0 °Ra [4.0 K] 39
20.0 °Ra [10.0 K] 39
4 °Ra [2 K] 39
30 % 39
140 °F [60 °C] 40
30 % 26
270 °F [130 °C] 40
200 °F [95 °C] 40
OFF 41
230 °F [110 °C] 41
OFF 41
41
40.0 °Ra [20.0 K]
30.0 °Ra [15.0 K] 41
OFF 42
OFF 42
110 °F [40 °C] 42
OFF 42
50 °F [10 °C] 42
OFF 42
40.0 °F [4.0 °C] 42
OFF 44
07:00 44
19:00 44
30 s 44
30 min 44
12.0 °Ra [6.0 K] 26
8.0 °Ra [4.0 K] 26
20.0 °Ra [10.0 K] 26
4 °Ra [2 K] 26
140.0 °F [60.0 °C] 27
136.0 °F [58.0 °C] 27
140.0 °F [60.0 °C] 27
150.0 °F [65.0 °C] 27
OFF 45
60 s 45
5.0 min 45
2.0 min 45
Auto 46
Auto 46
En 46
°C 46
46
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