Viessmann SCU224 User Manual page 36

SCU224
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]
nMN, n1MN, n2MN:
Pump speed control
Adjustment range:
30 ... 100
in steps of 5 %
Factory setting: 30
Confirmation enquiry
36
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5. Maximum tank temperature
Î Adjust the desired maximum tank temperature
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
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
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).