Systemair RDR User Manual

RDR

CAV Controller

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Table of Contents

Description ........................................................3

Dimensions ........................................................5

Ordering Codes ......................................................6

Technical Parameters ..................................................7

Installation ........................................................11

Maintenance .......................................................13

Transport, Storage and Operation ............................................14

Supplement ........................................................15

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Description

RDR is a constant air volume flow controller with mechanical type of operation (no need for auxiliary energy or
actuation). It is intended to control the constant air flow independently of the duct air pressure in the range of 50 Pa to
250 Pa. The constant air flow value can be set by a shifting dial within a range dependent on the size and configuration
of the product. The cartridge type casing fits into the circular ducts of 80 mm up to 250 mm in diameter. Foreseen
usage in residential premises, offices etc.

Highlights

• Easy adjustment

• Simple and quick installation

• Available from 80 mm to 250 mm

• Self-adjusting with high precision

Design

RDR is a cartridge type controller for insertion into the circular duct. The flow control part is made from polymer
material. The casing material on nominal sizes of ø 80 mm to ø 125 mm is polymer, on nominal sizes of ø 150 mm to ø
250 mm is galvanized steel. A rubber gasket on the casing secures air-tight and stable installation in the duct.

The air flow volume is controlled by the system composed from a dynamic pressure reactive damper, a calibrated
spring and an adjustment mechanism with a position arresting screw.

The controller can operate in horizontal and in vertical installation position.

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Product Parts

Components of RDR

Legend

1 Sleeve with lip seal
2 Shim (according to the airflow)
3 Regulator casing
4 Piece of regulation
5 Air flow setting and fixing screw

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Dimensions