19
AIR HANDLING UNIT START-UP
S
WITCHING ON THE
A
IR
H
ANDLING
U
NIT
Before first switching on of your Air Handling Unit, verify all previously done actions with below check-list:
Air Handling Unit is connected to the ducts
Air Handling Unit is connected to the heating and cooling media sources
All water coils are filled with water and vented
DX coil is properly connected to the DX compressor
Electric heater is properly connected to mains
All peripheral control elements are properly installed on the AHU and crossed to the switchboard
All inspection panels of the AHU are closed and locked
Base Air Handling Unit is properly connected to the mains
If above check list is positively passed, start the Air Handling Unit using main power switch (Figure 29).
Figure 29 - Main power switch of the Air Handling Unit
S
TART
-
UP BY MEANS OF THE
HMI
B
ASIC
In this chapter the basic AHU operations with use of HMI Basic interface will be demonstrated.
L
OOK OF THE
HMI
B
ASIC AND FUNCTION BUTTONS
The HMI Basic interface is equipped with the following control
elements (Figure 30):
LCD display
Mode button
– located in left-upper corner
Time schedule button (clock pictogram)
– located in left center
Adjustment knob with button
– combined knob and button in one
located in center of the interface below the LCD display
On/Off button (On-Off pictogram) located in the right center
Fan speed button (Fan pictogram)
– located in the right-upper corner
Figure 30 demonstrates the look of the HMI Basic for the Air Handling
Unit in Off mode. Besides the Off message, the current time and day
of the week will be displayed (for time and calendar settings refer
Installation, Operation and Maintenance Manual VENTUS COMPACT
VVS021c-VVS150c [EN]
or
Installation, Operation and Maintenance
Manual VENTUS Supended VVS005s-VVS030s [EN].
T
URNING THE
A
IR
H
ANDLING
U
NIT INTO
O
N MODE
To change the Air Handling Unit into On mode, press and hold the
button (Figure 31).
The interface look will change. Instead of Off message, the temperature
of the leading temperature sensor will be displayed. Current time and
day of the week will be be still displayed.
Mind, that putting the AHU into the ON
mode doesn’t mean starting the
fans. This will come in next step.
Air Handling Unit main power switch
Figure 30 - HMI Basic interface. Off mode
Figure 31 - Air Handling Unit in On mode