Wilo Stratos Série Notice De Montage Et De Mise En Service page 51

Control systems p-c, p-v and p-T:
Operating point
on max.
characteristic
Operating point in
control range
Setting range
6.3 Selecting the control system
Unit type
Heating-/ventilation- and air conditio-
ning systems with a resistor in the trans-
fer part (heating radiator + thermostatic
valve) 50% of the total resistance
Circulation systems for drinking water
with a resistor in the generator circuit
50% of the resistance in the ascanding
pipe
p-c (Fig. 9)
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 ope-
rating point to the left.
Read set value Hs and set
the pump in accordance
with this value.
H , H see 1.2.1 type code
min max
System conditions
1. Two-pipe systems with thermostatic/zone valves
and low consumer authority
H > 4m
x
N
Very long distribution lines
x
Heavily choked branch shut-off valves
x
Branch differential pressure regulator
x
High pressure losses in those system parts
x
through which the total volume flows
(boilers/refrigerating machines, poss. heat ex-
changers, distribution line up to 1st junction)
2. Primary circuits with high pressure losses
3. Circulation systems for drinking water with ther-
mostatic controlled branch shut-off valves
p-v (Fig. 8)
Continue the standard line
until it meets the max. cha-
racteristics line, then conti-
nue horizontally to the left,
read set value Hs and set
the pump in accordance
with this value.
ENGLISH
p-T (Fig. 10)
Settings are to be made
by Customer Services
via the LON bus or
with the IR monitor ta-
king into account the
unit
conditions.
T : 20 ...90°C
min
T : 40 ... 110°C
max
T -T 10°C
max min
Increase:
Hs/ T 1 m/10°C
H , H
min max
Recommended
control system
p-v
45