Carel k.Air, Руководство пользователя, Страница: 77 / 192

77
Functions k.air +030220981 rel. 1.2 - 01.12.2020
9.18 F ans
k.air manages up to two fans, one for supply and one for return, which may be:
• On/off ;
• Modulating;
• 3-speed modulating;
• Modulating EBMpapst via Modbus;
• Modulating Ziehlabegg via Modbus;
The return fan is optional, and if enabled it will be the same type as the supply fan. The confi guration is available on screen Ac01
and subsequently in menu B.Fans.
The following table summarises the control functions available
Type C ontrol D escription
On/Off - The fans are activated when the unit is switched on
3-speed modulating
-
The supply fan operates at three speeds (confi gured under B.Fans), selected on
Th-Tune or PGD, while the return fan operates at a percentage off set from the
supply fan.
Modulating and
modulating via Modbus Fixed speed The supply fan works at a fi xed speed set in menu B.Fans, while the return fan ope-
rates at a percentage off set from the supply fan. When the unit is switched on, the
fans are activated at the set speed.
Static pressure Each fan has PID control based on the pressure transducer reading and a set point
available in the set point menu
Flow-rate Each fan has PID control based on the pressure transducer reading, converted to air
fl ow-rate, and a set point available in the set point menu
CO2 air quality
(additional option) Air quality management using the fans is an additional option that can be com-
bined with fi xed speed, static pressure or fl ow-rate control. The fans will gradually
increase air fl ow according to the air quality control request. See the chapter on Air
quality control.
Freecooling
(additional option) Freecooling using the fans is an additional option that can be combined with fi xed
speed, static pressure or fl ow-rate control. The fans will gradually increase air fl ow
according to the request form the fi rst stage of main temperature control. See the
chapter on freecooling/freeheating.
Tab. 9.ai
R if D escription D ev Min Max UoM D ir Modbus BAC net
FANS
Ba0 1 Only for mask usage TRUE 0 1 - R DI701 BV1159
Fan regulation type (0: Static pressure; 1: Air fl ow; 2: Fixed speed) 2 0 2 - R/W HR1491 PIV299 2
Supply fan confi guration error - 0 1 - R DI702 BV1160
Ba0 3 Enable air quality regulation for fans FALS E 0 1 - R/W CS245 BV245
Enable air quality regulation for fresh air OR mixing damper FALS E 0 1 - R CS289 BV289
Air Quality - Fans PID parameters - Proportional gain 1.0 0.0 999.9 - R/W HR1492 AV2993
Air Quality - Fans PID parameters - Integral time 60 0 999 - R/W HR1493 PIV299 4
Ba1 5 Enable fan regulation in case of FreeCooling/FreeHeating FALS E 0 1 - R/W CS247 BV247
Ba2 7 Fan fi xed speed request 30.0 0.0 100.0 % R/W HR1507 AV3008
(0 = SPEED1; 1= SPEED2; 2= SPEED 3) Three speed fan request in
fi xed speed regulation 2 0 2 - R/W HR1508 PIV300 9
3 speeds fan type enabled - 0 1 - R DI704 BV1162
Three speed fan limit 1 33.0 0.0 Fans
Three-
Speed 2 % R/W HR1509 AV3010
3 speeds fan type enabled - 0 1 - R DI704 BV1162
Three speed fan limit 2 66.0 Fans
Three-
Speed 1 Fans
Three-
Speed 3 % R/W HR1510 AV3011
3 speeds fan type enabled - 0 1 - R DI704 BV1162
Three speed fan limit 3 100.0 Fan-
sThree-
Speed 2 100.0 % R/W HR1511 AV3012
Ba3 0 Fan air quality minimum request 10.0 0.0 100.0 % R/W HR1512 AV3013
Ba3 3 Fan temperature regulation PID parameters - Proportional gain 8.0 -999.9 999.9 - R/W HR1513 AV3014
Fan temperature regulation PID parameters - Integral time 120 0 65535 - R/W HR1514 PIV301 5
Ba3 6
Proportional gain 8.0 0.0 999.9 - R/W HR1515 AV3016
Integral time 120 0 999 - R/W HR1516 PIV301 7
Dead band 0.0 -999.9 999.9 - R/W HR1517 AV3018
Supply air fl ow deadband 0.0 0.0 3000.0 m^3/ h R/W HR1518 AV3019
Dead band 0.0 -999.9 999.9 - R/W HR1517 AV3018
Tab. 9.aj