RF1A-OT Wireless Receiver Operating Instructions
CAUTION! Before commencing any work on the electrical connections, you must first disconnect the device from the mains. None of the 230V connections must be live until the installation has been completed and the housing is closed. Only qualified electricians or authorised service staff are permitted to open the terminal box. There are parts that carry mains voltage behind the cover. The terminal box must not be left unsupervised when open. (Prevent non specialists and especially children from gaining access to it.) Ensure that this wireless enabled receiver is installed 1 metre from any metallic object, television, radio or wireless internet transmitter.
Contents
- 1. Specifications & Wiring
- 2. Mounting
- 3. Installation
- 4. Button / LED Description
- 5. Resetting the RF1A-OT Receiver
- 6. Connecting the RFRP-HW-OT Thermostat to an RF1A-OT Receiver
- 7. Disconnecting the RFRP-HW-OT Thermostat from an RF1A-OT Receiver
1. Specifications & Wiring
Specifications
- Power Supply: 200 - 240Vac 50-60Hz
- Contact Rating: 250 Vac 10(3)A
- Ambient Temp: 0~45°C
- Automatic Action: Type 1.C.Q
- Appliance Class: Class II appliance
- Pollution Degree: Pollution degree 2
- Rated Impulse Voltage: Resistance to voltage surge 2500V; as per EN 60730
- IP Rating: IP20
Wiring Diagram
The internal wiring diagram for the RF1A-OT shows connections for the Mains Supply: Live (L), Neutral (N), and OpenTherm (OT). Terminals are numbered 1, 2, 3. Terminal 1 is L, Terminal 2 is N, Terminal 3 is OT. A note indicates that if mains voltage output is required, terminals L and 2 must be electrically linked. A critical warning states not to connect mains voltage to OpenTherm terminals.
Mains Supply Connection
Connect the mains supply to the appropriate terminals (L and N). Ensure all connections are secure and that mains voltage is not present at the OpenTherm terminals.
2. Mounting
The RF1A-OT receiver should be wall mounted in an area within 20 metres distance of the wireless thermostat. It is important that the receiver is mounted more than 1 metre away from metallic objects, televisions, radios, or wireless internet transmitters, as these can affect communication. The receiver should also be installed at least 1 metre from any other electronic devices such as radios, TVs, microwaves, or wireless network adaptors.
- The unit can be fitted to:
- Recessed conduit boxes
- Surface mounting boxes
3. Installation
Slacken the fastening screw on the bottom of the receiver with a philips screwdriver. The receiver is hinged and can be opened 180 degrees. Mount the unit as described in Section 2. Wire the unit as described in Section 1. Close the receiver and tighten the fastening screw.
4. Button / LED Description
Controls
- [Connect Button]: Used to initiate the wireless pairing process.
- [Manual Override Button]: Manually overrides the system.
- [Reset Button]: Resets the RF1A-OT receiver.
Indicators
- [System ON Green LED]: Indicates system status.
- [Wireless Connect Red LED]: Indicates wireless connection status.
LED Status Descriptions
OT Connection Normal Operation
| Status | Green LED | Red LED |
|---|---|---|
| RF1A-OT On | ON | OFF - will flash when communicating via RF |
| RF1A-OT Off | OFF | ON - will flash when communicating via RF |
OT Communication Error
| Status | Green LED | Red LED |
|---|---|---|
| RF1A-OT On | Constant Flash | OFF |
| RF1A-OT Off | Constant Flash | ON |
RF Communication Error
| Status | Green LED | Red LED |
|---|---|---|
| RF1A-OT On | ON | Constant Flash |
| RF1A-OT Off | OFF | Constant Flash |
Summary
| Status | Green LED | Red LED |
|---|---|---|
| RF Communication Error | OFF or ON | Constant Flash |
| OT Communication Error | Constant Flash | OFF or ON |
| Normal Operation RF1A On | ON | OFF or Flashing |
| Normal Operation RF1A Off | OFF | ON or Flashing |
5. Resetting the RF1A-OT Receiver
Press the [Reset Button] located on the side of the receiver. The RF1A-OT receiver is now reset.
6. Connecting the RFRP-HW-OT Thermostat to an RF1A-OT Receiver
Note: If you are installing a CP4-HW-OT, the RFRP-HW-OT thermostat and the RF1A-OT receiver will have a pre-established RF connection, so it is not necessary to carry out the RF connection process below.
On the RF1A-OT Receiver:
Press the [Connect Button]. The red light will begin to flash.
On the RFRP-HW-OT Thermostat:
Press the [Connect Button]. The thermostat will show "nOE" followed by "---". Once an RF connection has been established, the thermostat will show 'r01' on the LCD screen. Press the 'OK' button to finish the process. The thermostat is now connected to the RF1A-OT receiver.
7. Disconnecting the RFRP-HW-OT Thermostat from an RF1A-OT Receiver
This can be done from either the thermostat or the receiver.
7.1 On the RFRP-HW-OT Thermostat:
Press the [Connect Button]. The thermostat will begin to search through the RF channels. Press and hold the 'Copy' button for 10 seconds. 'Adr' will appear on the screen of the thermostat. Press the 'OK' button twice to complete the unpairing process. The thermostat RFRP-HW-OT is now disconnected from the receiver RF1A-OT.
7.2 On the RF1A-OT Receiver:
Press the [Connect Button]; the red light will flash. (Red & green lights may flash if used as a hub receiver). Press and hold the [Connect Button] for approximately 10 seconds. The RF connection is now cleared.
EPH Controls Contact Information:
EPH Controls Ireland: technical@ephcontrols.com | www.ephcontrols.com
EPH Controls UK: technical@ephcontrols.com | www.ephcontrols.co.uk
Document Reference: 20221005_RF1A_OT_RFRP-HW-OT_OpIns_PK
