User Guide

Installation and operating instructions Wilo-Stratos /-D/-Z 29
English
Control modes 'p-c, 'p-v and 'p-T:
9 Maintenance/service
All servicing should be performed by an authorized service representative!
These pumps are maintenance free, self-lubricated by the system fluid, and
have no seals to leak or couplings to break.
'p-c (fig. 7) 'p-v (fig. 6) 'p-T (fig. 8)
Operating
point on max.
speed curve
Draw a line from the operating point to the left.
Read set value Hs and set the pump in
accordance with this value.
Settings are to be
made by the infrared
device.
Operating
point in
control range
Draw a line from the
operating point to the
left. Read set point Hs
and set the pump in
accordance with this
value.
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.
Setting range H
min
, H
max
see type key (chapter 5.1) T
min
: 68…212°F
(+20...+100°C)
T
max
: 86…230°F
(+30...+110°C)
'T = T
max
-T
min
t
50°F (10°C)
Increase:
'HS/'T d 3.3ft/50°F
(10°C) H
min
, H
max
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.
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.