King

Smart Heating Solutions

New Product Release: KRF-24V-KIT Wireless RF Thermostat System

Introducing the King KRF-24V-KIT, a smart, wireless solution designed for virtually any HVAC setup, eliminating the need for wiring between the HVAC unit and the thermostat. This system offers better comfort through better engineering.

Heat Kit Includes:

  • KRFTP-B: 7-Day Programmable RF Thermostat
  • KRFR-24V: 24V AC or DC HVAC Relay

KRF-24V-KIT

Wireless 24V Multi-System RF Thermostat Kit For 24V HVAC Control

This 7-Day Programmable 24V RF Thermostat communicates wirelessly using a 915 MHz signal with a 24V AC or DC relay wired to the HVAC unit. It features a touch screen LCD display, a temperature range of 44°F to 90°F (7°C to 32°C), and display accuracy of ±1°F. The system supports wireless two-way communication and has a working distance of 98.5 feet.

Available optional wireless RF Sensors can further enhance control by limiting operation based on room occupancy, a window left open, or outdoor air temperature conditions.

Thermostat System Diagram Description:

The system diagram illustrates the wireless connection between the KRFTP-B thermostat and the KRFR-24V relay. The thermostat, powered by 24V DC or AA battery, communicates wirelessly via a 915 MHz RF signal to the KRFR-24V relay. The KRFR-24V relay is then hardwired to the Heat Pump or Conventional HVAC System. Optional RF accessories, such as the KRF-PIR-SENSOR (Occupancy), KRF-WINDOW-SENSOR (Window/Door), KRF-MASTER-SWITCH, and KRF-REPEATER, connect wirelessly to the system to provide advanced control features.

KRFTP-B Thermostat Visual Description:

The KRFTP-B thermostat features a touch screen LCD display. The display shows the current temperature as 60°F and the set temperature as 62°F. Icons indicate the system mode is 'Heat', the fan is 'On', and the current time is 1:17 PM. It also shows battery status, and icons for 'Schedule' and 'Leave' modes.

KRFR-24V HVAC Relay Visual Description:

The KRFR-24V is a compact HVAC relay unit. It has input terminals labeled 'C', 'R', 'Y1', 'G', 'W1', 'W2', 'Y2', and 'O/B'. It is designed for 24V AC/DC input and has contact ratings for HVAC stages (Stage 1, Stage 2), Fan, and Changeover. It also features a 'Reset' and 'Pair' button.

Customer Needs Addressed:

  1. Easy Installation: Since the thermostat communicates wirelessly with the HVAC relay, it can be installed anywhere in the room without the need for complex wiring between the thermostat and the HVAC System. This makes installation quick and easy, especially in retrofit scenarios or where running new wires is difficult or costly.
  2. Accurate Climate Control: Thermostats placed near drafts, sunlight, or vents can misread temperatures, causing uneven comfort. The ThermaLink's wireless design allows easy repositioning to a better spot for more accurate, consistent climate control—no rewiring needed.

Features and Benefits:

FeaturesBenefits
24V or Battery Powered ThermostatLow voltage (24V) is safer and doesn't require a dedicated circuit.
7-Day Programmable Heating/Cooling ScheduleMeets State Energy Code Requirements.
Thermostat & Relay Communicate Wirelessly using 915 MHz RF Signals*
*KRFR relay is hardwired to the HVAC unit
Lower installation costs - No wiring required between devices.
Optional Wireless RF Accessories: Master Switch, Occupancy or Door/Window SensorsSet back the entire apartment with push of a button or based on occupancy, etc.

Applications:

  • Multi-Family Apartments
  • Low-Income Housing
  • Office Buildings
  • Hotels & Hospitality
  • Single Family Homes
  • States With Strict Energy Codes
  • Healthcare Facilities

Specifications:

KRFR-24V (HVAC Relay)

  • Input Rating: 24Vac/24Vdc, 2A
  • Wireless Two-way Communication
  • Working Frequency: 915 MHz
  • Working Distance: 98.5 feet

KRFTP-B (Thermostat)

  • Power Source: 18 to 30 VAC, 50/60 Hz hardwired or 1 x AA Battery powered
  • 7-day programmable schedule
  • Touch Screen LCD display
  • Range: 44°F to 90°F (7°C to 32°C)
  • Display Accuracy: ± 1°F
  • Wireless Two-way Communication
  • Working Frequency: 915 MHz
  • Working Distance: 98.5 feet
  • Keypad lockout
  • Maximum Heat Temperature Limits: 44°F to 90°F

Optional RF Accessories:

  • KRF-PIR-SENSOR: RF Battery-powered Occupancy PIR Sensor for automatic temperature setback when room is unoccupied. Setback Options: (44°F - 65°F).
  • KRF-WINDOW-SENSOR: RF Battery-powered Window Sensor Operation for automatic temperature setback when window or door is left open. Setback Options: (44°F - 65°F).
  • KRF-MASTER-SWITCH: RF Battery-powered Master Setback Switch. Manual switch to setback all systems that are paired to the switch upon exiting the building. Setback Options: (44°F - 65°F).
  • KRF-REPEATER: 5V USB-C Powered RF Signal Amplifier designed to amplify RF data signals in order to extend the range of the wireless transmission.
  • KRF-OUTDOOR-SENSOR: Outdoor Temperature Sensor, Battery Powered, For KRFTP Thermostat.

Ordering Information:

Complete Kit

MODELUPCDESCRIPTION
KRF-24V-KIT70426RF Thermostat Kit, w/ KRFTP-B Programmable BP Thermostat, KRFR-24V HVAC Relay

Order A'la Carte

MODELUPCDESCRIPTION
KRFTP-B70134Programmable Battery Powered Multi-System RF Thermostat
KRFR-24V7013620A Heat Relay, 120V or 240V

Optional Accessories

MODELUPCDESCRIPTION
KRF-PIR-SENSOR70152PIR Sensor, Battery Powered, For KRFTP Thermostat
KRF-OUTDOOR-SENSOR70153Outdoor Temperature Sensor, Battery Powered, For KRFTP Thermostat
KRF-REPEATER70154RF Repeater, USB Powered, For KRFTP Thermostat
KRF-WINDOW-SENSOR70155Window/Door Sensor, Battery Powered, For KRFTP Thermostat
KRF-MASTERSWITCH70156Master Switch, Battery Powered, For KRFTP Thermostat

Warranty:

2-Year Limited Warranty

King Electrical Manufacturing Company

9131 10th Avenue South, Seattle, WA 98108

Phone: 206.762.0400 | Fax: 206.763.7738

www.king-electric.com

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