RDH Recessed Over Door Heaters 3kW to 9kW
Applications
The RDH Recessed Over Door Heater is designed for use above frequently opened doors to limit the loss of heated air and the ingress of cold air. Typical installations include shops, entrance halls and workshop / warehouse doors.
The purpose designed mounting arrangement allows the RDH to be fitted within the ceiling space or over door bulkhead provided adequate provision is made for the incoming airflow.
Features
- 3kW, 4.5kW, 6kW and 9kW units available.
- special in-ceiling or bulkhead mounting.
- selection of heat and fan only with remote switch unit.
- complete with grille frame for a neat installation.
- outlet grille and frame have white powder coated finish.
- over temperature cut out with power off reset.
- can be mounted from above or below ceiling.
Specification
| Cat no | Watts | Volts | Heater | Grille | Wt kgs |
||||
| Length A mm |
Height H mm |
Depth mm |
Length B mm |
Width mm |
Depth mm |
||||
| RDH-3000 | 3000 | 230 | 570 | 210 | 120 | 625 | 145 | 30 | 6.0 |
| RDH-4500 | 4500 | 230 | 570 | 210 | 120 | 625 | 145 | 30 | 6.0 |
| RDH-6000 | 6000 | 230 | 800 | 210 | 120 | 855 | 145 | 30 | 13.0 |
| RDH-9000 | 9000 | 230/400 | 1170 | 210 | 120 | 1225 | 145 | 30 | 16.0 |
Installation
The heaters are designed to take their input air from the ceiling void it is therefore imperative that a suitably sized inlet grille is provided within the ceiling or enclosure. The minimum clearance to the top inlet grille is 20mm, to the back 30mm and to the front inlet grille 100mm. If one inlet grille is at its minimum dimension the other must have an unrestricted airflow. For optimum effect the heater should be mounted as close as possible to the top of the doorway. The maximum recommended mounting height is 2.3m for 3kW, 2.8m for 4.5, 6.0 and 9.0kW units.
It is recommended a frame is provided around the ceiling opening, The adjustable brackets then allow fixing to the top of this frame or to the face of the ceiling. Alternatively holes are provided in the top of heater for drop rod fixings.
The grille frame is fixed directly to the ceiling to provide a decorative finish.
3kW, 4.5kW and 6kW units are only suitable for connection to a 230V single phase power supply. The 9kW is suitable for both a 230V single phase or 400V three phase and neutral supply.
Connection should be made to a suitably fused power supply via the Remote Switch unit. 4.5kw, 6kW and 9kW must be connected directly to the power distribution board. Connections should be via a 2 pole switched connection unit having a contact separation of at least 3mm in all poles.
All Electrical connections should be made by a suitable qualified person in accordance with the latest edition of the IEE Requirements for Electrical Installation (BS 7671:1992)
- Download rdh 3000 installation instructions (.pdf)
- Download rdh 4500 installation instructions (.pdf)
- Download rdh 6000 installation instructions (.pdf)
- Download rdh 9000 installation instructions (.pdf)
Control
Heat output and fan only control is achieved with the remote switch unit.
RDH-3000 fan only with 1kW, 2kW and 3kW.
RDH-4500 fan only with 2.25kW and 4.5kW.
RDH-6000 fan only with 3kW and 6kW.
RDH-9000 fan only with 4.5kW and 9kW.