Throw pattern expanded to corners, which ensures pleasant room conditions even with higher cooling capacities.
Compact CAV/VAV chilled beam with 4-way air distribution for suspended ceilings. Ensures silent and pleasant room conditions even with higher cooling capacities.
The primary supply air enters the plenum of the Halton Rex Expander chilled beam, from which it is 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.
Fig.1. Operating principle of 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 panel and the heat exchanger.
Halton Air Quality (HAQ) control
Halton Air Quality (HAQ) control is used for adjusting or controlling the rate of the additional supply airflow in a room space. In normal conditions, fresh supply air is provided through the nozzles. Whenever additional air is needed (boost/VAV function), the HAQ control opens and provides more air. VAV stands for Variable Air Volume.
The HAQ control can also be used as a Constant Air Volume (CAV) damper, that is, it can be used for adjusting the k-factor to achieve the correct airflow with a certain pressure level. This removes the need for changing or plugging the nozzles of the Halton Rex Expander chilled beam.
Fig.2. VAV function: Supply air from nozzles (normal mode)
Fig.3. VAV function with HAQ control: Supply air from nozzles and HAQ control (boost mode).
Fig.4. Manual actuator of HAQ control
Fig.5. Electric actuator of HAQ control
Feature | Description |
---|---|
Airflow rate | Max. airflow rate < 35 dB: 57 l/s or 205 m³/h (RXP/E-1200) |
Dimensions | 600×600 mm or 1200×600 mm |
Water pressure drop |
Max. 18.6 kPa (RXP-1200, waterflow 0.1 kg/s) |
Cooling capacity | Up to 1700 W (RXP/E-1200, 100 Pa, 57 l/s, water inlet 14°C, water mass flow 0.1 kg/s, supply air 16°C) |
Weight | 10–22 kg |
Typical static pressure | 50–100 Pa |
Water temperature | 14–20°C (must be above dew point) Heating: 22–60°C |
Category |
Feature |
Option |
Description |
Size and orientation
|
Product length |
600, 1200 |
Two different lengths. Nominal width is always 600 mm. |
Duct connection
|
S2, R2, L2 |
Factory-positioned straight, right, or left Ø 125 mm. Position can be changed on site. See Fig. 1. |
|
S3, R3, L3 |
Ø 160 mm. Factory-positioned straight, right, or left. Position can be changed on site. See the figure below. Note: Only available if L=1200 and nozzle type=E. |
||
Cooling
|
Coil type
|
C |
Cooling coil. Connection pipes Ø 12 mm. |
H |
Cooling and heating coil. Connection pipes: 4 x Ø 12 mm. |
||
Airflow |
Nozzle type |
C, D, E |
3 options for different airflow or k-factor needs. Nozzle C is the smallest and nozzle E the largest. |
Halton Air Quality (HAQ) control |
NA |
No HAQ. K-factor is determined by nominal size and nozzle selection (CAV). | |
MA |
Manually adjustable CAV control of additional airflow. Standard air from nozzles, additional air from HAQ. |
||
MO |
Motorised VAV control of additional airflow. Standard air from nozzles, additional air from HAQ. |
Fig.1. Duct connection: Spigot positions left, straight, right
For more detailed information on the order code, see section Order code.
Halton Workplace WRA is part of the Halton Workplace solution offering.
Fig. 1: Halton Workplace WRA room automation controller integrated to Halton Rex Expander (RXP) chilled beam
Halton Workplace WRA is a controller especially designed for controlling the automation system of office spaces and meeting rooms. It is used for controlling the ventilation airflow, room temperature, and indoor air quality.
The Halton Workplace WRA room automation package consists of a controller unit and optional components depending on customer needs: a wall panel and sensors for temperature, CO2, occupancy, pressure, and condensation.
There are options available for the controller unit and wall panel, depending on the number of controls and sensors required. The Halton Workplace WRA room automation controller is always combined with other Halton products for adaptable and high-level indoor climate.
The Halton Workplace WRA room automation controller operates with Variable Air Volume (VAV) dampers and active chilled beams of the Halton Workplace system. These are used for adjusting the ventilation airflow, room temperature, and indoor air quality in office spaces.
Each room unit in an office space can have its own dedicated Halton Workplace WRA room automation controller, or a single controller can control multiple room units. The Halton Workplace WRA room automation controller can automatically adjust the system according to the indoor environment level preferred by users. Each room unit having its own dedicated controller brings maximum flexibility.
Fig. 2: Halton Rex Expander (RXP) active chilled beams with HAQ control and PTS damper, controlled with Halton Workplace WRA room automation controllers in a double office room
In this configuration, two Halton Workplace WRA room automation controllers (type DXR2.E18-102A) control two Halton Rex Expander (RXP) active chilled beams. Each chilled beam has heating and cooling valves, motorised Halton Air Quality (HAQ) control, as well as integrated CO2, pressure, and condensation sensors. A Halton PTS single-blade damper is used for controlling the minimum operating mode. The system also includes an exhaust VAV damper, window switch control, external occupancy sensor and a wall panel (type QMX3.P37) with a temperature sensor and display. One Halton Workplace WRA room automation controller can individually control up to four terminal units, and there can be several Halton Workplace WRA room automation controllers in the room.
Fig. 13: Schematic drawing: Halton Rex Expander (RXP) chilled beam (4-pipe) controlled with Halton Workplace WRA room automation controller
Code | Equipment |
RC | Controller unit |
FG | Airflow damper actuator |
FC | Airflow measurement |
H | Water valve actuator |
CS | Condensation sensor |
OS | Occupancy sensor |
PE | Pressure sensor |
CO2 | CO2 sensor |
WP | Wall panel |
TE | Temperature sensor |
TI | Temperature display |
WS | Window switch control |
Fig. 14: Factory-installed Halton Workplace WRA room automation controller, type DXR2.E18-102A
For the wiring diagram of similar configuration, see the product page of Halton Workplace WRA room automation controller, section Installation information.
Note: For more information, see the product pages of the Halton Workplace WRA room automation controller
Water valve selection is done in Halton Workplace WRA room automation system package. Water valve sizing depends on the number of secondary and primary chilled beam units that are controlled with single controller. One water valve is used to control the whole chilled beam group cooling or heating operated by one room controller. Water valve is sized for whole group when there are multiple chilled beams controlled with single controller unit. There can be one primary chilled beam with room controller and up to three secondary chilled beams. Water valve sizing for 1-4 chilled beams is shown below.
Number of chilled beams (pcs.) | Water valve type | Size for cooling (DN) | Size for heating (DN) | Installation |
1 | ABQM | DN15 | DN15 | Integrated to chilled beam |
2 | ABQM | DN20 | DN15 | Loose |
3 | ABQM | DN20 | DN15 | Loose |
4 | ABQM | DN25 | DN15 | Loose |
Number of chilled beams (pcs.) | Water valve type | Size for cooling (DN) | Size for heating (DN) | Installation |
1 | VPP46.. | DN15 | DN15 | Loose |
2 | VPP46.. | DN20 | DN15 | Loose |
3 | VPP46.. | DN20 | DN15 | Loose |
4 | VPP46.. | DN25 | DN15 | Loose |
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
Product |
Inlet/outlet water temp. |
Room temp. |
Chamber pressure |
Water mass flow |
Airflow |
Capacity |
||
Water |
Air (18°C) |
Total |
||||||
RXP/C-600 |
15/17 |
25 |
75 |
0.032 |
10 |
269 |
81 |
350 |
RXP/D-600 |
0.038 |
14 |
315 |
114 |
429 |
|||
RXP/E-600 |
0.049 |
22 |
407 |
183 |
590 |
|||
RXP/C-1200 |
15/18 |
0.043 |
18 |
536 |
150 |
686 |
||
RXP/D-1200 |
0.054 |
25 |
676 |
211 |
887 |
|||
RXP/E-1200 |
0.063 |
41 |
790 |
343 |
1133 |
Fig.1. Halton Rex Expander parts
No. |
Part | Description (material, colour options) |
1 |
Front panel | Pre-painted galvanised steel Polyester-painted, white (RAL 9003 or 9010), with special colours available. |
2 |
Nozzles | Nozzle plate: galvanised steel |
3 |
HAQ control (optional) | Painted galvanised steel |
4 |
Actuator of HAQ control (optional) | Electric actuator (shown in the figure): connecting cable length 0.9 m |
Manual actuator: galvanised steel | ||
5 |
Plenum | Pre-painted galvanised steel Polyester-painted, white (RAL 9003 or 9010) |
6 |
Brackets | Galvanised steel |
7 | Spigot | Galvanised steel |
8 | Frame | Pre-painted galvanised steel Polyester-painted, white (RAL 9003 or 9010), with special colours available. |
9 | Connection pipes | Copper. Ø 12 mm with a wall thickness of 0.9–1.0 mm, fulfilling the requirements of European Standard EN 1057:1996. |
10 | Coil/Heat exchanger | Pipes: copper Fins: aluminium |
The dimensions are given in millimetres (mm).
Fig.1. Halton Rex Expander dimensions (RXP-600)
Fig.2. Halton Rex Expander dimensions (RXP-1200)
Fig.3.Halton Rex Expander dimensions (RXP-1200 with duct connection Ø 160 mm)
Product |
AQ model |
Dry mass (excl. water) [kg] |
Water volume [l] |
RXP-600 |
NA |
10.5 |
0.5 |
MA |
11.4 |
||
MO |
11.6 |
||
RXP-1200 |
NA |
20.9 |
1.2 |
MA | 21.8 | ||
MO | 22.1 |
The product must fulfil the following requirements:
Structure
Materials
Packaging and identification
When planning the orientation of the Halton Rex Expander chilled beam, the location of the supply air and water circuit connections must be taken into account. The supply air spigot can be at either side of the unit or at the same end with the water connections. The location can be easily changed on site, if needed.
The location of the actuator of the HAQ control (optional) must also be taken into account to ensure access to the actuator. The actuator is located in the middle of the left side of the unit.
The Halton Rex Expander chilled beam can be attached directly to the ceiling surface (H = 220 mm) or suspended using threaded drop rods (8 mm). The brackets for ceiling installation are located at the sides of the unit.
Fig.1. Installation points of the RXP-1200 (RXP-600) chilled beam
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.
Adjustment of the cooling capacity
The recommended cooling water mass flow rate is 0.02–0.10 kg/s, resulting in a temperature rise of 1–4°C in the heat exchanger. To avoid condensation, the recommended minimum inlet water temperature of the heat exchanger is 14–16°C.
Adjustment of the heating capacity
The recommended heating water mass flow rate is 0.01–0.04 kg/s, resulting in a temperature drop of 5–15°C in the heat exchanger. The maximum inlet water temperature of the heat exchanger is 35°C.
Balancing and control of water flow rates
The water mass flow rates of the Halton Rex Expander chilled beam are balanced with adjustment valves installed on the outlet side of the cooling water loops. The cooling capacity of the Halton Rex Expander chilled beam is controlled by regulating the water mass flow rate.
Adjustment of the supply airflow rate
With a Halton Rex Expander chilled beam that does not have the Halton Air Quality (HAQ) control, the airflow depends on the chamber pressure and the selected nozzle. With the HAQ 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
where
qv Airflow rate [l/s] or [m³/h
Δpm Measured static chamber pressure [Pa]
k Determined according to the table below [l/s]. If calculating m³/h, multiply by 3.6.
Position of HAQ control |
Control signal voltage [V] |
RXP/C-600 |
RXP/D-600 |
RXP/E-600 |
RXP/C-1200 |
RXP/D-1200 |
RXP/E-1200 |
0 / no HAQ |
0-1 |
1.1 |
1.6 |
2.5 |
2.1 |
2.9 |
4.7 |
1 |
2 |
1.7 |
2.1 |
3.1 |
2.6 |
3.5 |
5.3 |
2 |
3 |
2.2 |
2.7 |
3.6 |
3.1 |
4.0 |
5.8 |
3 |
4 |
2.7 |
3.2 |
4.1 |
3.7 |
4.5 |
6.3 |
4 |
5 |
3.2 |
3.7 |
4.6 |
4.1 |
5.0 |
6.8 |
5 |
6 |
3.7 |
4.1 |
5.1 |
4.6 |
5.5 |
7.3 |
6 |
7 |
4.1 |
4.6 |
5.5 |
5.0 |
5.9 |
7.7 |
7 |
8 |
4.5 |
5.0 |
5.9 |
5.5 |
6.3 |
8.1 |
8 |
9 |
4.9 |
5.4 |
6.3 |
5.9 |
6.7 |
8.5 |
9 |
10 |
5.3 |
5.7 |
6.7 |
6.2 |
7.1 |
8.9 |
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*√(70) ≈ 34.3 l/s.
S = Nozzle type
C Medium
D Large
E Extra large
L = Length (mm)
600 or 1200
E = Duct connection
S2 Straight (Ø125)
R2 Right (Ø125)
L2 Left (Ø125)
S3 Straight (Ø160)
R3 Right (Ø160)
L3 Left (Ø160)
SP = System package
N No
Y Yes
TC = Cooling / Heating functions (Coil type)
C Cooling
H Cooling and heating
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)
System package Halton Workplace Room Automation (WRA)
Room exhaust VAV damper Halton Max One Circular (MOC)
Room exhaust VAV damper Halton Max Ultra Circular (MUC)
RXP/E-1200-S2, SP=N, TC=C, AQ=NA, CO=SW, ZT=N