Aube Technologies RC840 manual n Application, o Installation, p Typical Wiring Diagrams

RC840

Installation Guide

On/Off Switching Electric Heating Relay

nApplication

The RC840 Electric Heating Relay is designed to control a line voltage resistive load from a 24 V control signal.

The RC840 operates silently and can be installed in bedrooms, living rooms, or any other occupied area without disturbing occupants. On a call for heat, the relay is immediately activated; there is no delay. This increases temperature control and comfort.

NOTE: Not recommended for fast-cycling modulated regulation. For fast- cycling heating equipment, It is recommended to use the RT850 or RT850T (integrated 24 V transformer) Solid State Relay.

I

oInstallation

The RC840 must be installed in an area where the temperature is between -4°F and 140°F (-20°C and 60°C).

The RC840 can be installed on the side of an electrical box or a distribution panel or inside the wiring compartment of an electric baseboard.

For proper installation, use a screw and a washer.

pTypical Wiring Diagrams

Junction box	External 24V
	transformer
Black
Red

Low-voltage 2-wire thermostat

Load

You must provide an overload protection and disconnect as required.

Figure 1 : Connection to a 2-wire low voltage thermostat using a 24 V

external transformer

Junction box

External 24V transformer

Black

Red

Low-voltage 3-wire thermostat

Load

You must provide an overload protection and disconnect as required.

Figure 2 : Connection to a 3-wire low voltage thermostat using a 24 V

external transformer

On the side of	Inside the wiring compartment
an electrical box	of a baseboard

All wiring must comply with national and local electrical code regulations.

Installation should be carried out by an electrician.

Disconnect power supply before installing the relay to prevent electrical shock.

nSecure relay to the mounting surface using the two mounting brackets. Use the supplied lock nut to secure the relay to the junction box.

oWire the relay and connect according to typical wiring diagrams (refer to figures 1, 2 and 3).

pOnce mounting and wiring have been completed, return power to the heating system and test the installation.

q Increase the thermostat temperature to activate the relay. Allow

Junction box

Black

Red

Load

Junction box

Black

Red

Load

Low-voltage 2-wire thermostat

External 24V transformer

system operation long enough to proof installation. Once

installation has been proofed, set temperature to normal

setpoint.

You must provide an overload protection and disconnect as required. Transformer VA output = RC840 Quantity x 1.2 VA

Figure 3 : Connection to a 2-wire low voltage thermostat using a 24 V

external transformer and multiple relays

RC840 400-276-000-C 17/1/07 1/2