Viessmann SCU224 Manuel de service télécharger pdf (Page 36)

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SCU224

Now the controller is ready for operation with typical

settings to suit the selected system layout.

The settings made in the commissioning menu can be

changed later on in the corresponding adjustment channels.

Additional functions and options can of course be individu-

ally adjusted as well (see chap. 4.2).

5. Maximum tank temperature

Î Adjust the desired maximum tank temperature

S MX / S1MX / S2MX:

Maximum tank temp.

Adjustment range:

40 ... 200 °F [4 ... 95 °C]

Arr 10:

40 ... 190 °F [4 ... 90 °C]

in steps of 2 °Ra [1 K]

Factory setting:140 °F [60 °C]

Note:

The controller is also equipped with a non-

adjustable emergency shutdown function, which

will shut the system down if the tank reaches

200 °F [95 °C].

6. Minimum pump speed

Î Adjust a minimum speed for the pump

nMN, n1MN, n2MN:

Pump speed control

Adjustment range:

30 ... 100

in steps of 5 %

Factory setting: 30

Note:

If loads which are not speed-controlled (e.g.

valves) are used, the value must be set to 100 % for

the respective relay.

Completing the commissioning menu

After the last channel of the commissioning menu has been

adjusted and conﬁrmed, the controller asks for conﬁrma-

tion of the adjustments.

Î To conﬁrm the adjustments made in the commissioning

menu, press button 3

Conﬁrmation enquiry

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Viessmann SCU224 Manuel de service Page 36