Ready-to-use solution for compact and modular AHUs

k.vent: ready-to-use solution for compact and modular AHUsThe most recent buildings comply with high energy efficiency requirements, reducing thermal exchange and, at the same time, maintaining correct air change.

Energy saving & system optimisationIntelligent control strategies to manage all active parts of the AHU, optimising functions and energy efficiency through PID optimising algorithms

The market requires specific ventilation units to guarantee indoor air quality in buildings and personal comfort, together with the highest energy efficiency.CAREL k.Vent is a unique controller solution that guarantees high efficiency for ventilation units, from simple heat recovery units up to complex AHUs with built-in refrigeration circuit.Regulation (EC) No. 1253/2014 of the July 7 2014, concerning the environmental specifications of ventilation units requires specific features mainly aimed at reducing the energy consumption of buildings.The new k.Vent solution is designed to meet the needs of all air handling

Connectivity Simple integration of BMS system fieldbus devices:• Bacnet™ TCP/IP• ModBus® Slave TCP/IP

Modular approach Modular architecture with simple addition of new contents.

units, the result of CAREL’s analysis and experience in air handling unit applications and following current and future market requirements. This new generation of controllers is based on the latest CAREL technology: a powerful platform and advanced control algorithms to interconnect and optimise control of every part of the AHU.The unique wizard that guides users through the configuration means no programming skills are required saving up to 70% of typical set-up time. The controller can be configured directly on the HMI or by a special PC configuration tool; fast upload directly from PC or USB KEY.

One fits allOne solution with hundreds of integrated configurations is the key to customisation. Selectable parameters and funtions mean k.Vent can be sued with any ventilation equipment, from small residential heat recovery units to complex industrial air handling units.

pGDE

BACnet™ModBus® Slave

th-Tune Supply fan Return fan

USB key

pGDX

Modbus®

Refrigeration circuit managementManagement of a refrigeration circuit (ON/OFF or BLDC compressor with compressor drives, electronic expansion valve) in combination with heat recovery.

0

100%

Request (%)

Supplytemp.

Setmixingrecoveryheating

devicereheat

Easy operationFast setting and configuration on the display or via PC using a wizard that guides uses through the configuration, saving almost 70 % time.

k.Vent can manage any of the following devices:

Featuresk.Vent exploits the benefit of the new generation of CAREL controllers:• 4 DIN modules• 24 Vac power supply• 2 embedded RS485 ports• Embedded USB port for service• BMS via plug-in card• Ethernet port & web server• Precisely engineered• Reliable operation• Extensive functions• High communication speed

2-100.00.0.0.0.0 1-100.00.0.0.0.00

Fan type:• ON/OFF• 0-10 V signal• EBM fan• Ziehl Abegg

Return control

Supply control

Economizer device

Reheater devices

Preheater devicesReversible devices

Cooling devices

Heating devices

Heat recovery control

Hardware

Humidifier:• evaporative• steam• IEC+DEC

Economizer:• none• yes

Reheater:• Hot water• Direct expansion• Electric heater

Preheater:• Hot water• Direct expansion• Electric heater

Reversible:• Hydronic• Direct expansion• BLDC• BLDC on 1st circuit• ON/OFF compressors• BLDC rooftop• BLDC on 1st circuit rooftop• ON/OFF compressors on rooftop

Main cooler:• Chilled water;• Direct expansion.

Main heater:• Hot water;• Direct expansion;• Electric heater;• Steam.

Heat recovery:• Supply only;• Supply + exhaust;• Enthalpy wheel;• Glycol;• Cross-flow plate.

pGDE

BACnet™ModBus® Slave

th-Tune Supply fan Return fan

USB key

pGDX

Modbus®

ControlTo calculate device capacity, a PID sequence is used.In heating mode with just one set point and different sets of PID parameters, the first request is calculated using a standard PID. The second request starts when the first has reached 100%. The set point for controlling the second device is the same, while the set of PID parameters are different.According to PID behaviour of the second device, the percentage of activation of the second device at start up should be equal to the ‘’offset’’, however thanks to the incremental PID, only the last calculated delta can be considered, meaning no bumps, and the second device will start at minimum output and then be controlled according to the PID parameters and supply temperature.

Example of PID sequence in heating

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Headquarters ITALYCAREL Asia - www.carel.comCAREL Australia - www.carel.com.auCAREL Central & Southern Europe - www.carel.comCAREL Czech & Slovakia - www.carel.comCAREL Deutschland - www.carel.deCAREL China - www.carel-china.comCAREL France - www.carelfrance.fr CAREL Korea - www.carel.comCAREL Ibérica - www.carel.esCAREL Ireland - www.carel.comCAREL Italy - www.carel.itCAREL India - www.carel.in

CAREL Japan - www.carel-japan.comCAREL Mexicana - www.carel.mxCAREL Middle East - www.carel.comCAREL Nordic - www.carel.comCAREL Russia - www.carelrussia.comCAREL South Africa - www.carelcontrols.co.zaCAREL Sud America - www.carel.com.brCAREL Thailand - www.carel.comCAREL Turkey - www.carel.com.tr CAREL U.K. - www.careluk.co.ukCAREL U.S.A. - www.carelusa.com

For more information

CAREL INDUSTRIES reserves the right to modify the features of its products without prior notice. All registered trademarks are the property of their respective owners.© CAREL INDUSTRIES 2018 all rights reserved.

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User interfaces

pLDPRO• Compact size • Same resolution as pGD1 (132x64) and

same graphic features (icons, two char sizes,…)

• pLAN connection (RJ11) • White backlight• Buzzer• Index of protection of front panel IP65• Operating temperature range: -20T60°C• Ideal as local unit display

pGDe

• Resolution: 132x64 pixel for PGDe• Display: back-lit• Index of protection: IP65• Operating temperature range: -20T60°C• Device status shown by customisable

icons• Cyrillic, Greek, Danish, Swedish,

Norwegian, …characters available• Different text mode types

th-TuneThe th-Tune room terminal is simple and intuitive, using the buttons and the knob on the front panel to set temperature/ operating modes/ time bands (with on-board clock).

System componentsElectrical panel

Remote control of high efficiency units

pGDX • 4,3’’ resistive touch (480x272)• Built-in temperature and humidity probe

(optional model)• pGD¹ emulation • pGD¹ drilling hole• 24 Vdc power supply• Modbus® protocol• Panel and wall mounting• Front USB port (Host)• Temp. & hum. probe (optional) • Operating range:

- Outdoor -20T60°C - Indoor 0T50°C

• IP65

K.Vent can be supplied in a complete electrical panel. CAREL’s production of electrical panels follows standardised and tested processes using components selected from the leading worldwide brands, guaranteeing the highest quality. The k.Vent solutions with panels can be fully customised according to project specifications.

tServiceDedicated application for maintenance personnel• real time monitoring of active alarms• detailed view of the installation• modifications to the configuration• analysis of historical behaviour

tDisplayDedicated application for site managers

• highlight any alarms• site detail with real time monitoring of operating conditions for on-site equipment• remote modification of system configuration

tTraceDedicated application for data analysts

• system performance charts• custom dashboard layout• scheduled reports