short description

Product description

• Very flat design.
• Modular system.
• Based on VDI 6022.
• Modbus & BACnet.
• Optional rail system for single inspection.
• Operating mode Mode 4: Constant volumetric flow operation. Constant air volumetric flow parameterised. 2 integrated sensors.

Features

• RLT Flat compact unit with PWT. Heat recovery > 80%.
• Ready to connect with integrated controller and automatic bypass.
• Easy to inspect thanks to inspection doors that open wide and can be removed.
• Device classification A1 according to DIN 4102 (non-combustible), ErP-compliant, VDI 6022-compliant.
• Compliance with the following directives: Machinery Directive 2006/42/EC (including Low Voltage Directive), EMC Directive 2014/30/EU, Ecodesign Directive 2009/125/EC (Regulation No. 1253/2014 – LOT6) , RoHS 2 Directive 2011/65/EU.

Application field

• Commercial buildings, public buildings, e.g. schools and nursery schools, office and residential buildings as well as sports facilities.

Housing

• Compact design as a frameless, thermal bridge-optimised sheet steel construction with 40 mm mineral wool insulation, powder-coated on the outside in RAL 7016.
• Can be serviced from underneath.
• Device classification A1 according to DIN 4102 (non-combustible).
• The exterior panels are powder-coated in RAL 7047.
• Inside:
• Galvanised sheet steel.
• Smooth interior surfaces.
• Concealed electrical cables.
• Separate outside technical compartment housing the electrical components and controls.
• Generously sized inspection openings allow single access to the filters and all next internal components at maintenance work.
• The inspection doors are equipped with pressure-adaptive sealing to adjust to the pressure conditions inside the unit.
• Stainless steel condensate tray with slope on all sides for safe drainage of condensate; all other components are made of galvanised steel, aluminium or stainless steel and are therefore hygienic in accordance with VDI 6022.
• Mounting brackets for ceiling installation with M10 threaded rods are attached at the side of the unit.

Fans

• Direct-drive, single-inlet EC centrifugal fans with backward curved impeller blades made of composite material for optimised efficiency and minimised noise level.
• Maintenance-free, sealed ball bearings with long-term lubrication.
• Attached directly in the front chamber, removable for complete cleanability in accordance with VDI 6022.
• Impeller made of high-strength composite materials with flow-optimised inlet nozzle made of galvanised sheet steel with pressure measuring connection.
• Statically and dynamically balanced impeller in accordance with DIN ISO 2190-11.
• Vibration tested in accordance with ISO 14694, maximum vibration intensity is 3.5 mm/s.
• EC external rotor motor with integrated control electronics without rare earth magnets, featuring highly efficient electronic commutation (EC), integrated thermal switch-off and speed control.
• EC technology is an environmentally friendly solution that guarantees low energy consumption for control and regulation of the operating point at volumetric flows of 10 to 100%. This results in low noise levels for improved acoustic comfort.
• Integrated blockage protection, phase failure detection, soft start, over-temperature protection electronics, motor undervoltage failure detection, power limitation, motor current limitation.
• The fans comply with current EMC directives and requirements regarding mains interference and EMC interference immunity.
• Fan protection class: IP 55, insulation class "F", humidity (F) / environmental protection class (H) H1. The motor's efficiency class exceeds class IE4.
• The fans are mounted on pull-out rails for single maintenance.

Heat recovery

• Highly efficient counter current plate heat exchanger. Efficiency > 80% according to DIN EN 13141-7.
• The outside air and exhaust air flows are guided past each other separately via parallel slats using the counterflow principle.
• The integrated bypass in the outside air/supply air flow ensures frost protection in the event of freezing and provides free cooling in summer.

Condensate tray

• Hygienically perfect condensate drain in the unit thanks to a stainless steel condensate tray with a slope on all sides, laser-welded. Positioned completely under the heat exchanger.

Bypass shutter

• Bypass valve for free cooling and frost protection.
• Manual adjustment possible with push button.
• The drive is overload-proof and maintenance-free.
• Power consumption during operation: 1.5 W; power consumption in idle mode: 0.4 W.
• Shutter drive and gears positioned outside the air flow, making it suitable for increased hygiene requirements in accordance with VDI 6022.
• Energy-saving, pre-wired shutter drive.
• The integrated bypass, located in the outside air/supply air flow, provides frost protection in the event of freezing and serves as free cooling in summer.
• If the unit is equipped with electrical pre-heating, the control system automatically selects the optimum solution.
• In summer, the bypass regulates the set supply air temperature by means of modulation.

Filter

• The heat recovery unit is equipped as standard with a highly efficient ePM1 50% panel filter at the outside air inlet and an ePM10 50% panel filter at the exhaust air inlet.
• The filters are always installed in front of the respective components to guarantee their protection.
• Filter signalling via pressure difference measurement on the outside air filter and exhaust air filter.

Rectangular duct connection

• Rectangular duct connections for connecting rectangular ducts with a 20 mm profile.
• The profile must be supplemented with a sealing strip.
• Connection size according to technical data.
• Transition adapters from square to round are available as accessories.

Shut-off dampers for outside air and outgoing air

• Outside air and outgoing air shutters in aluminium housing with gear drive and counter-rotating, plastic-mounted aluminium profile blades with sealing lip, tightness class 2 in accordance with DIN EN 1751.
• The shutter drive and gear wheels, which are located outside the air flow, are therefore suitable for increased hygiene requirements in accordance with VDI 6022.
• Outside air and outgoing air shutters can be ordered as an option. When ordered, the shutters are factory-fitted to the outside of the unit frame and the servomotor is electrically connected.
• Connection size according to technical data.

Technical compartment

• Separate, at-side mounted technical compartment housing the electrical components and controls. Access from below at an angle.
• Cable ends within the technical compartment are clearly numbered using cable identification at each connection point and in the enclosed connection diagram to prevent confusion.

Cable connection

• Plug & Play connection: 5-pin connector on the terminal block inside the separate, lockable technical compartment.
• Rated voltage according to technical data.
• Recommended residual current circuit breaker: Class B or B+, tripping residual current see technical data.
• Recommended fuses for mains connection: D-Type "slow-blow"; D-10,000 A – AC3.

Electrical wiring

• Industrially manufactured cable harness, clear cable routing and unobstructed access to components at maintenance, as well as optimum cleaning options for surfaces.
• Cable ends within the technical compartment are clearly numbered using cable identification at each connection point and in the enclosed connection diagram to prevent confusion.
• Neat cable routing to the components inside the unit.

Control

• Fully integrated, completely wired control unit including main switch with all-pole isolation. Control unit integrated into technical compartment.
• Integrated safety elements for all control and regulation functions tailored to the ventilation unit:
• Motor protection switch with phase failure detection
• Short-circuit protection with magnetic short-circuit release
• Circuit breaker 230 V, tripping characteristic class C
• IG service switch, 4-phase, IP 54, CE compliant
• Guarantee of electrical safety in accordance with the following guidelines:
• Machinery Directive 2006/42/EC (Low Voltage Directive included)
• EMC Directive 2014/30/EU and complete functional testing at factory.
• Ready for operation with service switch.
• Integrated switchable power unit 230 VAC / 24 V DC, 2.5 A.
• Time programming for weekly schedules including holidays and bank holidays for an entire year.
• Automatic summer and winter time changeover.
• Individual timetable for each day of the week plus separate holiday and bank holiday timetable.
• 24 different holiday periods/bank holidays can be set.
• A holiday period can range from a single day up to 365 consecutive days.
• Holiday plans take precedence over other schedules.
• There are 8 different menus available, one for each day of the week and an additional one for holidays.
• Holiday plans take precedence over other weekday schedules.
• Each weekday schedule has up to two individual usage times.
• Daily individual time programmes available for level 2 and level 1, each with up to two usage times.

Operating mode / Mode

• The integrated controller is factory-set to the ordered operating mode (mode).
• The required operating mode must be defined at the device order. This ensures reliable operation as none of the intervention in the device is necessary on site.
• Parameterised to: see mode according to technical data.

Alarm message

• Alarms are logged in the alarm list.
• The list shows the type of alarm, date and time, and alarm type.

Languages

• German, French, Russian, Dutch, English, Swedish.

Interfaces

• The following interfaces for integration into building control systems are available as a standard feature:
• Ethernet interface for:
• Modbus TCP/IP protocol
• BACnet/IP: BACnet-AAC (Advanced Application Controller) protocol
• RS 485 interface for:
• Modbus RTU

Control module

• The RLT air handling unit comes with a control module for wall installation/device mounting.
• The control module is wired and has a four-line, backlit LCD display.