King Wireless 24V RF Thermostat Kit KRF-24V-KIT
For 24V HVAC System Control
Product Overview
The King Wireless 24V RF Thermostat Kit (KRF-24V-KIT) is a 24-Volt RF wireless thermostat platform designed for virtually every type of HVAC system. It is ideal for applications where there are insufficient wires, a broken wire, or for adding equipment like an add-on heat pump or a multi-stage system without the need to run additional wires.
The kit includes a 7-day programmable thermostat (KRFTP-B) that communicates wirelessly to a 24V relay (KRFR-24V) wired to the HVAC unit. The system supports optional RF sensors for added flexibility, allowing operation based on room occupancy or open windows/doors, and can also provide a master setback for all units in the building.
Key Features
- Kit includes KRFTP-B RF 24V RF Thermostat and KRFR-24V 24V RF HVAC relay.
- Wireless Two-way RF communication - 915 MHz.
- 24V HVAC control (Heating & Cooling).
- 7-day programmable schedule.
- Modes: Auto/Cool/Fan Only/Off/Heat.
- Range: 44°F to 90°F (7°C to 32°C).
- Accuracy: ± 1°F.
- Optimal start/stop functionality.
- Keypad lockout.
- Maximum cooling & heat temperature limits adjustable from 44°F to 90°F.
- Optional RF sensors for room occupancy or window/door status.
- 2 Year Limited Warranty.
System Diagram
The system diagram illustrates the KRFTP-B thermostat communicating wirelessly via RF 915 MHz to the KRFR-24V HVAC relay, which is connected to the 24V DC input of a Heat Pump or Conventional HVAC System. Optional RF accessories can be integrated into the system.
Ordering Information
Complete Kit
| MODEL | UPC | DESCRIPTION |
|---|---|---|
| KRF-24V-KIT | 70426 | RF Thermostat Kit, w/ KRFTP-B Programmable BP Thermostat, KRFR-24V HVAC Relay |
Order A'la Carte
| MODEL | UPC | DESCRIPTION |
|---|---|---|
| KRFTP-B | 70134 | Programmable Battery Powered Multi-System RF Thermostat |
| KRFR-24V | 70136 | 24V HVAC Relay, 24VAC/VDC, 2A |
Optional Accessories
| MODEL | UPC | DESCRIPTION |
|---|---|---|
| KRF-PIR-SENSOR | 70152 | PIR Sensor, Battery Powered, For KRFTP Thermostat |
| KRF-REPEATER | 70154 | RF Repeater, USB Powered, For KRFTP Thermostat |
| KRF-WINDOW-SENSOR | 70155 | Window/Door Sensor, Battery Powered, For KRFTP Thermostat |
| KRF-MASTER-SWITCH | 70156 | Master Switch, Battery Powered, For KRFTP Thermostat |
Engineering Specifications
KRFR-24V RF Thermostat Kit Specifications:
- Supply Voltage: 24V, 50-60Hz Rating: 0.5A
- Wireless Operation: Rf Connect Button
- Working Frequency: 915 MHz
- Heat Pump Control: (Heating and Cooling).
- Touch Screen: Touch Sensitive
- Temperature Display Range: 0°F to 95°F (-17°C to 35°C)
- Temperature Control Range: 44°F to 90°F (07° C to 32°C)
- Display Accuracy: ± 1°F
- Optimal Start/Stop: Ensures set temperature is reached at the scheduled time; Optimal Stop shuts down the system early upon PROG transition to save energy.
- Deadband: Adjustable 4 to 6 Degrees. (Default 5)
- Differential: adjustable from 0.5°F to 2.0°F (Default 1°F)
- 2nd Stage Offset: adjustable from 2°F to 5°F (Default 3°F)
- Heat Schedule Options: 5+2/5+1+1/7-Day (Default: 5+2)
KRFR-24V HVAC Relay Specifications:
- Input Rating: 24Vac/24Vdc, 2A
- Wireless Connect: Rf Connect Button
- Two-way Communication
- Working Frequency: 915 MHz
- Working Distance: 30 Meters (98.5 feet)
- Dimension: 120*40*28 mm
Available Optional Accessories Details
RF Battery-powered Occupancy PIR Sensor (KRF-PIR-SENSOR): For automatic temperature setback when room is unoccupied. Setback Options: (44°F - 65°F).
RF 5V USB-C Powered RF Signal Amplifier (KRF-REPEATER): Designed to amplify RF data signals to extend the range of wireless transmission.
RF Battery-powered Window/Door Sensor Operation (KRF-WINDOW-SENSOR): For automatic temperature setback when window or door is left open. Setback Options: (44°F - 65°F).
RF Battery-powered Master Setback Switch (KRF-MASTER-SWITCH): Manual switch to setback all systems paired to the switch upon exiting the building. Setback Options: (44°F - 65°F).
