136
n
min
EN/06.2019/G57 © STULZ GmbH – all rights reserved
C7000 INSTRUCTIONS fOR a/C UNITS
time
Setpoint
standby
unit
supply air
pressure
on
off
fan speed
The supply air pressure is higher than the setpoint
The fan speed of all units in a zone is reduced to the minimum speed. As soon as the minimum speed is rea-
ched, the SAPSM delay is started. If the supply air pressure is still higher than the setpoint after the SAPSM
delay has elapsed, while the fans run with minimum speed, the standby unit, whose SAPSM delay has elapsed,
is switched off.
SAPSM delay
SAPSM delay
The SAPSM reacts on deviations from the supply air pressure setpoint as follows: