Carel k.Air, Руководство пользователя, Страница: 52 / 192

52
Functions
k.air +030220981 rel. 1.2 - 01.12.2020
9.2.2 W arm up disabled
On start-up, the fresh air, exhaust and bypass dampers are opened completely. The next phase starts after a delay (opening
time - “Ca01”) to allow complete opening. If the return fan is fi tted, this is started, and the supply fan is then activated after the
“supply fan delay”. The unit then switches to steady state operation.
9.2.3 W arm up enabled
If the mixing damper is:
1. fi tted: it is opened completely;
2. absent: the fresh air and exhaust dampers are opened completely.
Then, if fi tted, the return fan is activated and after the “supply fan delay”, the outside air temperature is checked. If:
1. the outside air temperature is lower than the threshold: the heating/mixed coil, the bypass damper and the supply fan are
activated, at the percentage defi ned by the parameter, for the “Warm- up delay” time.
2. the outside temperature is higher than the threshold: normal control starts immediately.
After the warm-up phase, the unit switches to steady state operation.
Warm-up can also be enabled without an outside air temperature probe. In this case, the warm up will always be performed and
will end after a time equal to the “warm-up delay”.
R if D escription D ev Min Max UoM D ir Modbus BAC net
U N IT
Ac44 Enable warm up procedure during start up state FALSE 0 1 - R/W CS228 BV228
Low external temperature threshold for the activation of warm up procedure -1.0 - 99.0 99.0 °C R/W HR1329 AV2837
Settable delay between return and supply fan activation (seconds).
To be used only when warm up procedure is disabled 15 1 999 s R/W HR1330 PIV2838
Warm up delay time 15 1 60 s R/W HR1331 PIV2839
Warm up fan activation delay time 15 0 600 s R/W HR1332 PIV2840
Tab. 9.e
R if D escription D ev Min Max UoM D ir Modbus BAC net
DA M P E RS
Ca01 Damper opening time 120 0 65535 s R/W HR1639 PIV3134
Tab. 9.f
9.3 S hutdown
In the same way as when switching on, the k.Air software enables the unit to be switched off if at least one of the enabled
commands is set to OFF (PGD1/th-Tune, BMS, DI, Scheduler). Once the command is
received, the unit goes into shutdown status, during which the devices follow a specifi c sequence until the unit is completely
switched OFF. This sequence includes:
1. deactivation of the coils, electric heaters, heat recovery unit and compressor (following the ramps and/or timings)
2. deactivation of the fans after the post-ventilation time, counted from the end of phase 1.
3. closing of the dampers.
R if D escription D ev Min Max UoM D ir Modbus BAC net
FANS
Ba12
Fan post ventilation time 10 0 600 s R/W HR1500 PIV3001
Enabling the selection of the temperature regulation for the fans - 0 1 - R DI703 BV1161
Enable fan temperature regulation FALSE 0 1 - R/W CS246 BV246
Tab. 9.g
After the damper travel time (settable on screen Ca01), the unit will be OFF.
Note:
during the shutdown phase, certain confi guration parameters cannot be modifi ed in the same way as for normal
operation.