Viessmann SCU224 Manual de Serviço descarregar pdf (Página 17)

17 |

SCU224

4.1.8∆T-regulation

DT O:

Switch-on temperature

difference

Adjustment range

2,0 ... 40,0 °Ra

Factory setting 12.0

DT F / DT1F / DT2F / DT3F:

Switch-off temperature

difference

Adjustment range 1,0 ... 38,0°Ra

Factory setting 8,0°Ra

4.1.9Tankmaximumtemperature

If the adjusted maximum tank temperature is exceeded,

further heating of the tank is stopped so that damaging

overheating can be avoided. If the maximum tank temperature

is exceeded, the display will show the symbol

Please note: The controller is equipped with a security-

switch-off of the tank, which avoids further heating of the

tank if 203 °F is reached at the tank.

S MX / S1MX / S2MX:

Maximum tank temp.

Adjustment range 40 ... 203 °F

Factory setting 140 °F

Primarily the controller looks at the temperature difference

between the collector temperature sensor and the tank

temperature sensor. If the switch-on temperature difference

(DT O / DT1O / DT2O) is reached, the pump is activated.

If the adjusted switch-off temperature is underrun (DTF /

DT1F / DT2F), the controller switches-off.

Maximum temperature limitation

The controller is equipped with an independent tempe-

rature differential regulation for which minimum and

maximum temperature limations as well as corresponding

switch-on and -off temperatures can be separately adjusted.

Only possible for Arr = 2 and 8 (e.g. for solid fuel boilers or

heat exchange regulation).

If the adjusted value MX3O is exceeded, relay 2 will

be deactivated. When falling below MX3F, the re-

lay will be switched on again.

Reference sensor:

S3 by Arr 8 (TSTU)

S4 by Arr 2 (TST2)

Is the adjusted value MN3O underrun, relay 2 will be

deactivated. By falling below MN3F, the relay will be

switched on again.

Reference sensor:

S4 by Arr 8 (TFSB)

S3 by Arr 2 (TSTU)

Both switch on- and switch off temperature differences

DT3F and DT3O apply parallely for the maximal- and

minimal temperature limit.

MX3O / MX3F:

Maximum temperature limi-

tation

Adjustment range 30 ... 205°F

Factory setting

MX3O 140°F

MX3F 136°F

Minimum temperature limitation

MN3O / MN3F:

Minimum temperature limi-

tation

Adjustment range 30 ... 195°F

Factory setting:

Arr = 2

MN3O 40°F

MN3F 50F

Arr = 8

MN3O 140°F

MN3F 150°F

4.1.10 ∆T-controller (solid fuel boiler and heat exchange)

Please note: Switch-on temperature difference DT O must

be at least 2 °Ra higher than the switch-off tempe rature-

difference DF.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 23 24

Comentários a estes Manuais

Sem comentários

Viessmann SCU224 Manual de Serviço Página 17

Comentários a estes Manuais

Manuais e produtos relacionados com Medição, teste e controlo Viessmann SCU224