Example diagram for determining the
required pump setting for Vito-
clima 200-C, type OC212
A
Range of the required flow
rate
BCD
Points of intersection deliv-
ery pressure/pump curves
(1)
Stage 1: lowest throughput
(2)
Stage 2: average through-
put
(3)
Stage 3: highest throughput
Explanations to the example diagram
Required heating or cooling water throughput
(min./max.) for Vitoclima 200-C, type OC208:
Heating mode: 1162/1742 l/h
Cooling mode: 1270/1903 l/h
Calculated available delivery pressure:
0.35 bar
Result:
Starting from 0.35 bar (
≙
3.5 m head) in this diagram, the points of intersection
B
and
D
with the pump curves for stage 1 and 3 lie
outside
the range of the
required flow rate.
The point of intersection
C
with the pump curve for stage 2 lies
within
the
range of the required flow rate.
Therefore, set the pump to stage 2.
Adjusting the pump rate
Danger
Touching 'live' components can result in the transfer of dangerous body
currents.
Isolate the unit from the power supply, check that it is no longer 'live' and
safeguard against unauthorised reconnection.
1.
Remove the pump cover (for pump
position, see
D
in the figure on
page 5).
2.
Position rotary selector
D
to the
required pump stage (
A
= stage 1;
B
= stage 2;
C
= stage 3).
3.
Fit the pump cover.
Further details regarding the individual steps
(cont.)
17
Commissioning, inspection, maintenance
5692
695
GB
Summary of Contents for OC208HM
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