Setting The Pump Performance - Wilo Stratos Notice De Montage Et De Mise En Service

8.4 Setting the pump performance

During planning, the unit is designed for a specific duty point (hydraulic full-
load point for maximum heating power requirement calculated). During com-
missioning, the pump capacity (delivery head) must be set according to the duty
point of the unit. The factory setting does not comply with the pump capacity
required for the system. It is determined with the help of the pump curve dia-
gram for the selected pump type (from catalogue/data sheet).
See also Fig. 8 to 10.
Δp-c, Δp-v and Δp-T control modes:
Duty point on
maximum curve
Duty point within
the control range
Adjustment range H
Installation and operating instructions Wilo-Stratos/-D/-Z/-ZD
Δp-c (Fig. 9)
Draw from duty point towards the left.
Read off setpoint H
S
value.
Draw from duty point
towards the left. Read
off setpoint H and
S
set the pump to this
value.
H
,
min max
see catalogue
Δp-v (Fig. 8)
and set the pump to this
Go along the control
curve up to the max-
imum curve, then
move horizontally to
the left. Read off the
setpoint H and set
S
the pump to this
value.
Δp-T (Fig. 10)
The settings are to
be made by cus-
tomer service taking
the plant conditions
into account, via the
serial digital inter-
face or using an IR
operating and serv-
ice unit (accessory).
T : 20 ... 100 °C
min
T : 30 ... 110 °C
max
ΔT = T ≥
-T
max min
10 °C
Gradient:
ΔHs/ΔT ≤ 1 m/10 °C
H H
,
min max
Adjustment in
positive effective
direction:
> H
H
max min
Adjustment in
negative effective
direction:
> H
H
min max
English
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