Maintenance/Service - Wilo Stratos 1.25x3-20 Notice De Montage Et De Mise En Service

Control modes 'p-c, 'p-v and 'p-T:
Operating
point on max.
speed curve
Operating
point in
control range
Setting range

9 Maintenance/service

All servicing should be performed by an authorized service representative!
DANGER! Electrical shock hazard
Dangers caused by electrical energy must be avoided.
All electrical work must be performed after the electrical supply has been
disconnected and secured against unauthorized switching.
WARNING! Risk of scalding
At high water temperatures and system pressure close isolating valves
before and after the pump.
First allow pump to cool down.
These pumps are maintenance free, self-lubricated by the system fluid, and
have no seals to leak or couplings to break.
CAUTION! Possible damage of the pump
If the motor head is separated from the pump housing for servicing or repair
work, the O-ring situated between the motor head and pump housing must
be replace by a new one. When refitting the motor head, make sure the O-
ring is positioned correctly.
Installation and operating instructions Wilo-Stratos /-D/-Z
'p-c (fig. 7)
Draw a line from the operating point to the left.
Read set value Hs and set the pump in
accordance with this value.
Draw a line from the
operating point to the
left. Read set point Hs
and set the pump in
accordance with this
value.
H , H see type key (chapter 5.1)
min max
'p-v (fig. 6)
Continue the standard
line until it meets the
max. speed curve,
then continue
horizontally to the
left, read set point Hs
and set the pump in
accordance with this
value.
'p-T (fig. 8)
Settings are to be
made by the infrared
device.
T : 68...212°F
min
(+20...+100°C)
T : 86...230°F
max
(+30...+110°C)
'T = T t
-T
max min
50°F (10°C)
Increase:
'HS/'T d 3.3 ft/50°F
(10°C) H , H
min max
English
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