Halton Rex Expander (RXP) – Chilled beam Overview Compact CAV/VAV chilled beam with 4-way air distribution for suspended ceilings. Ensures silent and pleasant room conditions even with higher cooling capacities. Application area • Cooling and ventilation in offices, hospital rooms, schools, and public spaces. • Can be used in Halton’s demand-based ventilation systems. Key features • Active chilled beam with 4-way air distribution. • Adjustable airflow using manual CAV or motorised VAV, with the Halton Air Quality (HAQ) control. • Throw pattern expanded to corners, which ensures pleasant room conditions even with high cooling capacities. Operating principle The primary supply air enters the plenum of the Halton Rex Expander chilled beam, from which it is 1 Halton reserves the right to alter products with

diffused into the room through the nozzles and supply slots. The air jets from the nozzles induce ambient room air efficiently through the heat exchanger, where the air is cooled by means of the cool water circulating in the heat exchanger. The supply slots direct the air jets horizontally along the ceiling surface, which prevents the feeling of draught. the Halton Rex Expander chilled beam In figure Operating principle of the Halton Rex Expander chilled beam, the blue arrows show the supply air coming through the supply slots. The red arrows show the ambient room air going through the front...

air from nozzles (normal mode) HAQ control: Supply air from nozzles and HAQ control (boost mode)

Manual actuator of HAQ control

Quick selection Airflow Fig. 1. Airflow ranges for Halton Rex Expander without HAQ/with HAQ closed Fig. 2. Airflow ranges for Halton Rex Expander with HAQ @60 Pa, 125 mm spigot Cooling capacity

Fig.1: Halton Rex Expander parts

Description (material, colour options) Dimensions and weight The dimensions are given in millimetres (mm).

Weight: Product Dry mass (excl. water) [kg]

Specification The product must fulfil the following requirements: Structure • Integral recirculation air path through the perforated front panel. • Front panel removable to allow general maintenance and cleaning. • Front panel removable without special tools. • Four-directional air distribution. • Unit width 595 mm, height 220 mm. • Inlet duct diameter 125 mm. • Duct connection position changeable without special tools. • Measurement tap to allow airflow measurement. • Pipework’s maximum operating pressure 1.0 MPa. Materials • Plenum, frame, and front panel manufactured from galvanised steel....

Because there are no moving parts in the Halton Rex Expander chilled beam, no anti-vibration protection is needed when installing the unit or when connecting the unit to supply air or water circuit connections. It is recommended that the main pipelines of the cooling and heating water circuits are installed above the level of the heat exchanger to enable venting of the pipework. The maximum operating pressure for chilled/hot water pipework is 1.0 MPa. Commissioning Adjustment of the cooling capacity The recommended cooling water mass flow rate is 0.02–0.10 kg/s, resulting in a temperature rise...

control included, also the position of the HAQ control must be taken into account. The chamber pressure can be measured from a measurement tap under the front panel. The total airflow rate is calculated using the formula below. Total airflow rate Airflow rate [l/s] or [m³/h Measured static chamber pressure [Pa] Determined according to the table below [l/s]. If calculating m³/h, multiply by 3.6.

Example: The measured static chamber pressure is 70 Pa for RXP/E-600, and the position of the HAQ control is 3. The total airflow rate is 4.1*V(70) « 34.3l/s.

RXP/S-L-E, TC-AQ-CO-ZT S = Nozzle type C Nozzle C D Nozzle D E Nozzle E L = Length 600 or 1200 E = Duct connection S2 Straight / 125 mm R2 Right / 125 mm L2 Left / 125 mm Other options and accessories TC = Cooling / Heating functions (Coil type) C Cooling AQ = Halton Air Quality (HAQ) control NA Not assigned (CAV) MA Manual (adjustable CAV) MO Motorised (VAV) CO = Colour SW Signal white (RAL 9003) W Pure white (RAL 9010) X Special colour ZT = Tailored product N No Y Yes (ETO) Order code example RXP/E-1200-S2, TC=C, AQ=NA, CO=SW, ZT=N