RF1A-OT - Wireless Receiver

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

Important: Keep this document. Prior to operation, it is necessary to complete all required settings described in this section.

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
• Class II appliance
• Pollution degree: Pollution degree 2
• Rated Impulse Voltage: Resistance to voltage surge 2500V; as per EN 60730
• IP Rating: IP20

Internal Wiring Diagram Description:

The internal wiring diagram for the RF1A-OT shows terminals labeled L, N, OT, ON, COM, OFF. The MAINS SUPPLY connects to terminals L and N. For mains voltage output, terminals L and 2 must be electrically linked. Important: Do not connect Mains Voltage to 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 metal objects, as this will affect communication with the thermostat.

The receiver should also be installed at least 1 metre from any electronic devices such as radio, TV, microwave, or wireless network adaptor.

The unit can be fitted to:

1. Recessed conduit boxes
2. Surface mounting boxes

3. Installation

Slacken the fastening screw on the bottom of the receiver with a Phillips 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

The RF1A-OT receiver features several buttons and LEDs for operation and status indication.

Buttons:

• Connect button: Used to initiate the pairing process with the wireless thermostat.
• Manual override button: This button will manually override the system.
• Reset button: Located on the side of the receiver for resetting the device.

LED Indicators:

• System ON (Green LED): Indicates the system status.
• Wireless connect indicator (Red LED): Indicates wireless communication status.

Wireless Connect Process:

Once voltage has been applied, press the Connect button to initialise the pairing process with the wireless thermostat. Once pressed, the red and green LEDs will begin to flash.

Manual Override:

Pressing the Manual override button will manually control the heating system.

LED Description Table:

5. Resetting the RF1A-OT Receiver

To reset 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:

1. Press the Connect button.
2. The thermostat will show "nOE" followed by "---".
3. Once an RF connection has been established, the thermostat will show 'r01' on the LCD screen.
4. 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:

1. Press the Connect button. The thermostat will begin to search through the RF channels.
2. Press and hold the 'Copy' button for 10 seconds. 'Adr' will appear on the screen of the thermostat.
3. 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:

1. Press the Connect button; the red light will flash. (Red & green lights if using as a hub receiver).
2. Press and hold the Connect button for about 10 seconds; the receiver will then stop flashing.

The RF connection is now cleared.