Remak VCS User Manual

18
Air-Handling Unit Additional Operating Modes
If no operating mode is applied and the time schedule mode
is in the Stop state, the air-handling unit can be started from
additional operating modes. e user can use the following
additional operating modes to start the air-handling unit:
n Night chilling
n Temperature start-up
n Optimized start

Additional operating modes can be activated by the HMI-SG
controller in the List of Data Points in the section Settings –
Additional Operating Modes, Functions.
Control Application Starting Algorithm
Air-handling system operation safety is assessed first (fire
detection and operational safety of the air-handling devices).
en the operating modes and their priorities are assessed
(Manual, External, HMI-SG controller, BMS and time modes). If
no control mode is currently used, the air-handling unit can, but
may not, be put into one of the additional operating modes de-
pending on the user's option. All the operating modes and their
correlation are shown in the figure # 10 - "Operating modes".
e current operating mode can be monitored through the
HMI controller in the List of Data Points in the section Moni-
tor – Current Modes.
When the fans run and the air-handling unit is in operation,
two basic groups of parameters are used to control operation:
n Temperature mode
n Fan output (speed)
e fan output or speed can be set directly at levels corre-
sponding to the air-handling system configuration:
n Single-speed motor fans:
>> Stage1
n Two-speed motor fans:
>> Stage1 / Stage2
n All five-stage controlled fans:
>> Stage1 / Stage2 /
Stage3 / Stage4 / Stage5
See the chapter Fan Speed Control.
Figure 17 – Operating modes
Alarm A
State
Yes
No
Stop
Stop,Co1,EC1,...
Manual
Co1,EC1,Co2, ...
RUN
Co1,EC1,Co2, ...
HMI-SG (p. 125)
HMI TM, DM
Fans
(stage 1-5)
Comfort/
Economy
Auto
Auto
Auto
Auto
Stop
Passive
Active
Passive
Active
Passive
Active
Passive
External
control
Optimized
start
HMI-SG
contr.
BMS
Time
modes
Optimized
start
Temperature
start-up
Night
chilling
Night
turning
Temperature
start-up
Night
chilling
STOP
Night
turning
Additional Operating Modes

Remak VCS Specifications

General

Brand	Remak
Model	VCS
Category	Control Unit
Language	English