Stulz C7000 - Page 144

144
➊
➋
n
1
DT
0
DT
t
➍
➏
n
max Zone
m • n
max Zone
m
1
n
1
=
➊
➋
➍
➎
➏
➏
n
max
EN/06.2019/G57 © STULZ GmbH – all rights reserved
C7000 INSTRUCTIONS fOR a/C UNITS
Differential temperature control according to return air with CW standby Management
m : number of units in the zone
m
1
: number of running units in the zone
There are m units in a zone. If all m units are running, the minimum speed of each fan in each unit is n
max Zone
. If only
m
1
units are in operation (due to the failure of one unit), the minimum speed of each fan is n
1
.
Example: m = 7 ; m
1
= 6
n
1
= 7 • 60% / 6
n
1
= 70%
Return air temp.
Fan speed
Setpoint (return air or supply air)
For A/C units of the versions CW or ACW/GCW with CW cooling priority, which are assigned to a zone in com-
bination with a CW standby management, a control according to the following diagram is possible. The lower
fan speed of the proportional range is correspondingly raised in case of failure of an A/C unit.
fan 1 dtcstart 0,2
fan 1 dtcband 1
fan 1 nmax 95
fan 1 dtctype 1
zone 1 nmax 60
Config/Zone/more/more