Shut-down for Maintenance
The air conditioner can be switched off, e.g. for maintenance work, using BI or the
BACnet object. In this case, the shutdown sequence is started and the system
performs a controlled shutdown. The stop sequence is executed by activating the
input PrtOpModRIn or the BACnet object PltShD. These functions override all other
influences except the emergency control, protection control and operation via BI.
Available parameters
Current values
BACnet object
R/RW
Note
Plant start / stop state
PltSttStpSta
MVAL,397
R
1: off
2: Purge heating coil
3: Open dampers
4: Startup exhaust fan
5: Startup supply fan
6: Prepare normal operation
7: Normal operation
8: Cooldown el. Heater
9: Ramp down fans
10: Close dampers
11: Ramp down ERC
12: Power up delay
Initiate controlled shutdown
PltShdn
BVAL,266
RW
0:Inactive
1: Active
BI controlled shutdown
PrtOpModRIn
BI,85 (D1)
BI,102 (D2)
BI,119 (X3)
BI,136 (X8)
R
0: Inactive
1: Active
Basic settings
BACnet object
R/RW
Note
Delay time after power-on, startup step 2 DlyPwrUpHrv
PINTVAL,130
RW
s [min value 120 sec, if fire
dampers are used]
Timeout for water heating coil purge,
startup step 4
DlyMaxFrpSttUp
PINTVAL,109
RW
sec.
Runtime for outside air dampers, startup
step 5
DlyOnAflVntReq
PINTVAL,81
RW
sec.
Delay time for exhaust fan only, startup
step 6
DlyOnAflEhSta
PINTVAL,129
RW
sec.
Delay time supply fan ramp up, startup
step 7
TiSttUpSpdVnt
PINTVAl,104
RW
sec.
Delay time before normal operation,
startup step 8
DlyOnAirFlSta
PINTVAL,103
RW
sec.
Delay time cooldown electric heaters,
shutdown step 2
DlyOffAflHldH
PINTVAL,107
RW
sec.
Application functionalities
Start-up / shut-down sequence
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