RC845 Installation Instructions for Heat Pump Systems

RC845 - Installation Instructions

Heat Pump Add-On Fossil Fuel Relay

RC845

Application

The RC845 is designed to control either a gas, oil furnace burner or an electric furnace as well as the fan when adding a heat pump on an existing heating system.

The RC845 includes a low voltage dry contact output to activate the auxiliary heating system, and a line voltage contact output to control the fan operation.

When installed with an Aube heat pump thermostat (TH144HP), the installer can configure the auxiliary heat sequence to turn OFF the compressor (Y) on a call for auxiliary heat.

The RC845 combined with the TH144HP thermostat offers a complete integrated solution that simplifies installation and provides proper equipment operation.

Installation

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 in or on the electrical enclosure using the provided lock-nut (see Figure 1).

oWire the RC845 line voltage side as per Figure 2. The line voltage contact must be connected in parallel with the Plenum Thermostat, usually known as the Fan and Limit Controller (fan side). Connect as follows:

• RC845 black wire must be connected to L1 (hot).

• RC845 red wire must be connected to the fan side.

pConnect the RC845 low voltage terminals W, G and C to the corresponding terminals on the heat pump thermostat.

qConnect the RC845 Auxiliary Heat dry contact outputs (T, T) to:

•oil burner terminals T and T; or

•gas control terminals TH and TH; or

•electric heat furnace terminals R and W.

rOnce mounting and wiring have been completed, return power to the heating system and proof installation.

sTo proof installation, select the Emergency Heat mode on your thermostat. Increase the thermostat setpoint to activate the auxiliary heating system.

Allow system operation long enough to proof relay operation. Once installation has been proofed, disable the Emergency Heat mode and define setpoint for normal operation.

Operating Sequence

On a call for heat or cool, the heat pump thermostat (TH144HP) activates the G terminal; the RC845 activates the fan.

When auxiliary heat is required, the heat pump thermostat activates the W terminal; the RC845 dry contact outputs T, T closes to activate the auxiliary heat system.

NOTE: The RC845 line voltage contact is connected in parallel with the furnace fan and limit controller (fan side). When the thermostat setpoint has been reached, the fan may continue to run until the fan and limit controller setpoint is reached.

FIGURE 1

FIGURE 2

Installation on the side of an electrical box

1/2	400-277-000-B

RC845 specifications

Aube Technologies has made a significant impact in the realm of advanced temperature management and control solutions with its innovative product, the RC845. This model stands out due to its blend of cutting-edge technology, user-friendly design, and energy-efficient performance, aimed at providing precise temperature control for home and industrial settings alike.

The RC845 is especially noted for its ability to manage heating systems effectively. Equipped with a microprocessor-based control system, it ensures accurate temperature readings and adjustments. Users can expect a significant boost in efficiency, as the thermostat employs an advanced predictive algorithm that learns from the user’s habits and preferences. This feature allows the RC845 to make intelligent adjustments, minimizing energy consumption while maintaining a comfortable environment.

One of the main highlights of the RC845 is its versatility. It is compatible with various heating systems, including electric, hydronic, and forced air types, making it suitable for a wide range of applications. The thermostat can be easily configured to suit different setups, ensuring that it meets the specific requirements of each user’s heating system.

Additionally, the RC845 features a large, easy-to-read display that provides clear information at a glance, including current temperature and set points. The interface is intuitive, allowing users to navigate settings effortlessly. Moreover, the model offers programmable settings, enabling users to create schedules that reflect their daily routines, further optimizing energy efficiency and comfort.

In terms of installation, the RC845 is designed to simplify the process. Its compact size allows for easy placement, and it comes with a user-friendly manual that guides the installation with straightforward instructions. Whether for residential or commercial use, users can have peace of mind knowing that the RC845 can be set up quickly and efficiently.

Safety features are also paramount in the RC845’s design. It includes programmable limits and a fault detection system that warns users of any potential issues, ensuring that heating systems operate safely and effectively.

Overall, Aube Technologies’ RC845 thermostat exemplifies the perfect combination of technology, efficiency, and practicality. With its advanced features and user-oriented design, the RC845 stands out as an ideal solution for anyone looking to enhance their temperature control systems.