7.2.4.1
Variant of peak load 1
Control peak load by relay
A relay output is available for connecting the peak loadfan. The setting for
“
peak loadon
”
is the point (percentage of the control
range) at which the secondfan is connected. The speedof the fan 1 increases constantly up to the switch-on point.
On reaching the connection point the relay for the peak loadfan switches on andthe speedof the
rst fan is reduced to an
adjustable minimum value. Then the speed of the
rst fan increases to maximum.
Diagram: Peak loadfan via relay K3
Zuschaltpunkt
trigger point
(variabel)
100
100
0
100
0
Geregelte Gruppe
group controlled
nM
[%]
R
[%]
1
Ungeregelte Gruppe
group not controlled
2
3
5
4
17.09.2008
v_dia_spila_relais.vsd
1 Regulated group
2 Unregulated group
3 Connection point (variable)
4 Peak load min.
5 Max. load On
nM Motor speed
R Pband
Example: Connection Max. loadover Relays K3
M
1~
M
1~
N
N
U1
U2
L1
L1
31
32
K3
PTE-6/10AHQX-L
17.09.2008
v_anschl_spila_relais.vsd
2
1
1~ 230 V
50/60 Hz
1 Fan 1: continuously regulated
2 Peak load fan: IO Setup Function K3 = Code 4
7.2.4.2
Variant of peak load 2 and 3
Control peak load via 0
–
10 V
Variant 2
A regulatedfan anda regulatedpeak loadfan
with differ-
ent quantities of air
. After the
rst fan has reachedthe
connection point of the peak load fan, this holds its speed.
The second(smaller) fan switches on andis slowly turned
up.
Variant 3
A regulatedfan anda regulatedpeak loadfan
with equal
quantities of air
. The speedof fan 1 (on the regulator )
increases to a percentage of the control range (switch-on
point peak loadfan). Then fan 1 andthe peak loadfan
(output 0
–
10 V) are set to a value at which both fans
convey about the same amount of air as fan 1. previously
alone. Both fans run parallel to maximum power from here
on.
Example: Connection Max. loadover output 1 (0 - 10 V)
M
1~
N
U1
U2
L1
PTE-6/10AHQX-L
17.09.2008
v_anschl_spila_analog_out.vsd
1
1~ 230 V
50/60 Hz
A 1 GND
M
1~
N
U1
U2
L1
PKE.. / PXET..
2
1~ 230 V
50/60 Hz
E
GND
1 Fan 1: continuously regulated
2 Fan 2: continuously regulated: Peak load_ IO Setup = Code 15
Operating Instructions
UNIcon / Acontrol
The Installation menu
L-BAL-E051-GB 1035 Index 003
Part.-No. 00163311-GB
22/83