Stulz C7000 - Page 125

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© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS fOR A/C UNITS
EFC mode
The FC mode changes to the EFC mode, when the outside temperature is higher than the ECO start tempera-
ture and when the room temperature is above the setpoint.
In general the EFC mode is applied within the shaded area in the diagram below.
ECO
Start temp.
OT
ECO
Hysteresis
on
off
Anti-freeze
temp.
Max. sp. – basic sp.
RT1 – SP
Control factor =
Example: basic speed = nmax = 70%, Max speed = 100%, SP = 24°C, RT1 = 25°C
results in a control factor of 30.
SP RT
1
RT
EFC mode
Control in EFC mode
The room temperature is controlled by the airflow by modifying the fan speed. Starting from the basic speed
1
,
the fan speed is raised proportionally in relation to the temperature difference RT - SP up to maximum speed
1
.
The ECO louvers are fully opened.
You can set the room temperature RT
1 at which the fan shall reach 100% speed by setting the control factor
for the fan correspondingly. (see menu "components/air/fan/general)
Enabling
Fan speed
Max.speed
basic speed
EFC mode
FC mode
1
see Fan speed table