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CNVA

Product catalog summary

General Description
The SCHAKO CNVA floor convectors are decentralized air-conditioners designed for energy-efficient air-conditioning in spaces like offices and public buildings. They are ideal for rooms with large glass facades and eliminate the need for visible radiators. Equipped with EC fans, they offer high efficiency and safety, available in three sizes with 15 standard variants.

Advantages/Customer Benefits
The CNVA convectors prevent cold air drops in winter and heat build-up in summer. They are compact, have adjustable screws, high performance, low sound emission, and minimal energy consumption. Maintenance is easy with removable parts and flexible connections.

Operation
The convectors draw room air through a fan, cool or heat it via a heat exchanger, and supply it back to the room. Control is managed by water-side valves and variable fan speeds.

Equipment Description
The housing is made of galvanized sheet steel with an anodized aluminum frame. The heat exchanger can be a 2-pipe or 4-pipe system, and the fan is a cross-flow type with ECM. The filter is synthetic with a fire classification of B1.

Construction and Dimensions
CNVA models vary in height and width, with customizable lengths up to 3000 mm. The heat exchanger's position depends on connection positions.

Accessories
Accessories include dummy pieces, primary air connecting pieces, flexible metal hoses, condensate pumps, control boards, and mounting options. Grilles and profiles come in different finishes.

Connections
Multiple connection options for water and primary air are available, with specific configurations for each model. Actuators and valves offer thermal and electronic control.

Regulation and Control System
The system is regulated using actuators and room temperature controllers, offering various control outputs and modes.

Models
Available in different models with varying dimensions and configurations to suit installation requirements.

Installation and Maintenance
Installation involves connecting to water and air sources, with maintenance facilitated by easy access to internal components.

Technical Data
Detailed specifications are provided for each model, including dimensions, weight, and water capacity.

Order Codes
Specific order codes detail the configuration and options available for different CNVA and CNVAZ models.

Specifications and Features
The regulation and control system includes presence detectors, dew point monitors, electrical heaters, and supply air temperature sensors. It supports automatic/manual heating/cooling mode switchover, adjustable parameters, and setpoint limits. The RDG160T model includes an infrared remote control receiver and a weekly switching program, while the RDG160KN model supports NX communication.

Control and Compatibility
When operating multiple CNVAs in parallel, load limits must be considered. A maximum of 10 CNVAs can be controlled by a thermostat if equipped with specific switching valves. The RDG160T controller is incompatible with the control board (-S1). Alarm signals from condensate pumps can be managed through specific connections.

Technical Data of Valves
Technical specifications for various valve models include connection types, flow rates, and pressure limits.

Electrical Junction Box
All convectors come with an IP65-rated electrical junction box, featuring a standard connecting plate or an optional control board for different operating modes. The control board supports three modes for managing heating, cooling, and fan speed using 0...10 V DC signals.

Models and Accessories
The CNVA series includes various models with options for connecting pieces, insulation, adjustable legs, and protective covers. Dimensions and installation recommendations are detailed for these components.

Condensate Pump
Technical data for the condensate pump includes a maximum delivery rate of 15 l/h, a delivery height of 2 m, and a power supply requirement of 220-240 V. The pump features overheating protection and an IP64 protection class.

Installation and Maintenance
The CNVA series is designed for horizontal mounting in false floors, with adjustable legs for precise alignment. Maintenance is facilitated by the ability to swivel the heat exchanger and remove internal parts without tools.

Performance Data
Detailed performance data for various CNVA models in both heating and cooling modes, including air and water temperature conditions, flow rates, and power consumption according to DIN EN 16430 standards.

Technical Specifications
Detailed technical specifications for the CNVA series focus on both heating and cooling systems. The CNVA-190 models are available in 2-pipe and 4-pipe configurations, with performance data outlined for various operational conditions.

Performance Data
Tables present performance data for the CNVA-190 models under different conditions. Key parameters include volumetric flow (V), total thermal capacity (Q), water flow volume (VW), water-side pressure loss (PaW), and sound power level (LWA). The data is categorized by fan speed percentages and nominal lengths.

Cooling and Heating Systems
The cooling system operates with air at 26°C and water at 16°C/18°C, while the heating system uses air at 20°C and water at 75°C/65°C, both according to DIN EN 16430 standards.

Order Code and Configuration
A comprehensive order code system allows customization of various aspects such as height, model variant, nominal length, housing position, grille type, and additional features like water connections and control options.

Construction and Materials
The CNVA convectors are constructed from galvanized sheet steel with aluminum frames and grille layers. Internal components are painted to RAL 9005, and units are equipped with EC motors for efficient fan operation. The design includes features for easy maintenance, such as tool-free fan removal and adjustable legs.

Additional Features
Standard features include a stainless steel condensate pan, adjustable legs, and a protective cardboard insert for transport. Optional features include various grille inserts, primary air connecting pieces, and condensate pumps.

Legend and Definitions
A legend explains the abbreviations and technical terms used, such as NL (Nominal Length), V (Volumetric Flow), Q (Thermal Capacity), and LWA (Sound Power Level).

Product Overview
The SCHAKO type CNVA is available as either a linear or roll-down grille, designed for heating and cooling applications with various models and configurations.

Models and Variants

Height options include 106 mm, 150 mm, and 190 mm, with corresponding widths.
2-pipe and 4-pipe registers are available for different heating and cooling needs.

Nominal and Total Length

Nominal lengths are 1150 mm, 2000 mm, and 2750 mm.
Total length must be specified with four digits, with a maximum of 3000 mm.

Grille and Frame Options

Grille layers are available in natural, black, and bronze anodised aluminium.
Options for linear and roll-down grille inserts in various finishes.

Connection Options

Various connecting piece diameters with or without rubber lip seals.
Primary air connecting pieces can be positioned laterally or at the front.
Water connections include several pre-equipped and valve set options.

Control and Accessories

Electric junction boxes with different control options.
End pieces and external coatings available for customization.
Adjustable legs and protective mounting covers offered.

Additional Features

Condensate pumps available for certain models.
Soundproofing bulkheads and cuts/bevel cuts for dummy elements.

Catalog excerpts

TECHNICAL DOCUMENTATION SCHAKO | Ferdinand Schad KG Steigstraße 25-27 D-78600 Kolbingen

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TECHNICAL DOCUMENTATION General description | Advantages/Customer benefits | Operation GENERAL DESCRIPTION The SCHAKO floor convectors CNVA as decentralised airconditioners enable energy-efficient and comfortable airconditioning of offices, public buildings, sales rooms and living spaces. The room air (1) to be air-conditioned is taken into the convector by the fan (4) via the slip-resistant grille and the filter, cooled or heated via the heat exchanger (3) and supplied again to the room (2) via the tread-resistant grille. The CNVA floor convectors are particularly suitable for rooms with large...

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TECHNICAL DOCUMENTATION Description of the equipment DESCRIPTION OF THE EQUIPMENT MODELS Housing • Made of galvanised sheet steel, painted on the inside and outside to RAL 9005 (black), with pre-marked connection openings for electrical and hydraulic connections on the right (-W2/-W4) and left (-W1/-W3), respectively. • Upper frame made of extruded anodised aluminium profiles E6/Ev1 (-G1). Other colours on request. • Spacer bridges made of galvanised sheet steel RAL 9005. Tread-resistant louvre grid • Extruded anodised aluminium profile. Painting optional: - Linear grille aluminium natural colour...

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TECHNICAL DOCUMENTATION Construction and Dimensions CONSTRUCTION AND DIMENSIONS WIDTH AND HEIGHT Figure 4: Width and Height of the CNVA HEAT EXCHANGER QUICK SELECTION CNVA-…-H2 Diagram 1: Heat exchanger quick selection NOMINAL LENGTH Figure 5: Nominal length (NL) of the CNVA

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TECHNICAL DOCUMENTATION Construction and Dimensions 2. Model Total length (LG) > Nominal length (NL) Heat exchanger on the right (-R) in all connection positions. Heat exchanger on the left (-L) in all connection positions. H (mm) W (mm) Heat exchanger Weight (kg) HeaAmount ting of water (l) Cooling NL=1150 mm 1. Standard model Total length (LG) = Nominal length (NL): • Heat exchanger on the right whenever connections are on the left (-S). • Heat exchanger on the left whenever connections are on the right (-S). The position of the heat exchanger in the housing depends on the position of the connections...

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TECHNICAL DOCUMENTATION Construction and Dimensions EXPLODED DRAWING 1. Tread-resistant louvre grid 2. Spacer bridges 7. EC fan 3. Filter 4. Filter frame 5. Cover plate 6. Heat exchanger 8. Junction box 9. Housing 10. Adjustable legs Figure 9: Exploded drawing of the CNVA Construction subject to change No return possible

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TECHNICAL DOCUMENTATION Accessories │ Connections PRIMARY AIR CONNECTING PIECE Additional connecting piece for primary air entry with air diffuser plate (connection to room side). 3 1 Figure 13: Primary air connection pipe for CNVA Primary air connecting piece position • Without primary air connecting piece (-0) • Lateral left primary air connecting piece (-1) • Lateral right primary air connecting piece (-2) • Primary air connecting piece left front side (room side) (-3) • Primary air connecting piece right front side (room side) (4) • Primary air connecting piece centre dummy piece (-5) • Two...

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TECHNICAL DOCUMENTATION Connections Figure 15: Connection position for type H=106 Figure 17: Connection position for type H=190 DIMENSIONS OF THE WATER CONNECTIONS Figure 18: Dimensions of the water connections Figure 16: Connection position for type H=150

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TECHNICAL DOCUMENTATION Connections | ROOM TEMPERATURE CONTROLLER RDG160T (OPTIONAL) ACTUATORS Model STA • Actuating power 100 N. • Simple installation. • Standard version prewired. • Motion and position indicator. • Two-/ three-wire connecFigure 19: STA tion. • Pulse width modulation (PDM). • STA23: Actuator thermal, operating voltage AC 230 V, actuator signal 2-point. • STA73: Actuator thermal, operating voltage AC/DC 24 V, actuator signal 2-point or PDM. • Normally Closed (NC). Model SABNM • SABNM-LOG: Actuator thermal, operating voltage DC 24 V, control 0...10 V DC. Model SSA • Actuating...

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TECHNICAL DOCUMENTATION Regulation and control system | REGULATION AND CONTROL SYSTEM ELECTRICAL JUNCTION BOX CONTROL BOARD (OPTIONAL) All convectors are equipped with an electrical junction box with degree of protection IP65, including an electrical connecting plate with spring clamps (-S0) or alternatively with a control board likewise with spring clamps for three operating modes (-S1) Electric card for controlling the convector by means of 0...10 V DC signals. The control board has three operating modes, which can be selected by means of switches. Figure 22: Electrical junction box CONNECTING...

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TECHNICAL DOCUMENTATION Models MODELS CONNECTING PIECE FOR BAND DESIGN DIMENSIONS OF THE GRILLE INSERT WITH AND WITHOUT END PIECE Figure 25: Connecting piece for band design Thermal and acoustic insulation made of 3-mm polyethylene on the outside of the housing (-A3). Recommended for installation in false floors. Connecting pieces for band design. At the ends without end pieces Possible design with end piece on both sides (-E2), without end piece (-E0), right only (-ER) or left only (-EL). Figure 26: Total length of the tread-resistant grilles with or without end piece

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TECHNICAL DOCUMENTATION Models ADJUSTABLE LEGS PROTECTIVE MOUNTING COVER Dimensions of the adjustable legs • L=70 mm (-07), adjustable legs for adjusting the device height up to 60 mm. Fastening point on room side. • L=130 mm (-13), adjustable legs for adjusting the device height up to 120 mm. (Limited to device dimensions of type H=106). Fastening point on room side. • Threaded rod DIN913 M8 (S=4mm) As standard, the device is delivered with a cover of stable cardboard for protection against dirt and damage during transport and up to commissioning (-M1). Optionally, a protective mounting cover...

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TECHNICAL DOCUMENTATION Models Circuit diagram CONDENSATE PUMP Pump and small sensor housing for emptying the water of condensation formed in the cooling register. Drain Float block Condensate pan Condensate pump Figure 29: Condensate pump Technical data Max. delivery rate Max. delivery height Maximum pressure Electric power Power supply Alarm Overheating protection operating ratio Protection class Dimensions 15 l/h 2m 10 m 19 W 220-240 V NO/NC 5 A 70 °C 100% IP64 Pump block: 85x28x48 mm Float block: 78x38x37 mm Figure 31: Circuit diagram of condensate pump with connecting plate (S0) Table 7:...

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DISA-601
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