The ADEMCO INC (HONEYWELL HOMES) Resideo Honeywell RC845/U is a fossil fuel relay designed for efficient operation in HVAC systems. This relay supports a fan contact rating of 22 amps, making it suitable for various heating applications. It operates at 120V with a 0.8 HP capacity and can handle up to 240V at 1.5 HP for auxiliary heating elements. Constructed with durable materials, this relay ensures reliable performance and compliance with industry standards. Ideal for use in residential and commercial heating systems, it provides seamless integration with existing setups.
22 A fan contact 120 V/0.8 HP 240 V/1.5 HP auxiliary heat contact 5 A/30 V
Residential Comfort/Combustion : Radiant Heating Controls : Heating Relays : Heat Pump Add-on Relay : RC845 : RC845/U
Add-on fossil fuel relay. Control gas, oil furnace burner or electric furnace.
Overview
Controls a gas, oil or electric furnace and the fan when adding a heat pump to an existing heating system
Features
- Compatible with most heat pump thermostats
- Compact size permits installation on or inside an electrical box
- Integrated design eliminates need for two-relay setup
- Clearly labeled wires and connections enable simple installation and servicing
- Low voltage dry contact output activates auxiliary heating system
- Line voltage contact output controls fan
- Terminal board connection enables easy installation
Product Specifications
- Application
- Control gas, oil furnace burner or electric furnace as well as the fan when adding a heat pump on an existing heating system
- Dimensions (in.)
- 3-7/32 in wide x 2-7/32 in. high x 1-13/32 in. deep
- Dimensions (mm)
- 82 mm wide x 56 mm high x 36 mm deep
- Includes
- Lock-nut
- Used With
- TH144 Series; TH146 Series
- Comments
- Compatible with most thermostats for heat pump add-ons on fossil fuel heating systems
- Item Type
- Product
- Electrical Ratings
- Inductive Load-- 0.8 HP @ 120 Vac, 1.0 HP @ 208 Vac (Fan Output), At full load-- 16 A @120 Vac, 12 A @ 240 Vac, At locked rotor-- 42 A @ 120 or 240 Vac
- Frequency
- 60 Hz
- Approvals, Underwriters Laboratories Inc.
- Approved
- Operating Humidity Range (% RH)
- 0 to 95% RH, non-condensing
- Temperature Ratings (C)
- -20 C to 60 C
- Temperature Ratings (F)
- -4 F to 140 F
- Shipping and Storage Temperature Range (F)
- -40 F to 175 F
- Shipping and Storage Temperature Range (C)
- -40 C to 80 C
- Approvals, Canadian Underwriters Laboratories Inc.
- Approved
- Weight (oz)
- 11.5 oz
- Weight (g)
- 326 g
- Input Voltage
- Fan Contacts: 120 Vac; 240 Vac
- Transformer
- Fan Contacts: 22 A @ 120/240 Vac; Aux. Heat Contacts: 5 A @ 30 V
- Terminal Wire size
- 12 AWG
