kotech's room temperature control system
Will lead the way in developing new technologies for a new heating culture.
Wireless Control System
Wireless Control System

This Control System can be readily installed in existing housing units or remodeled apartments, without need for any additional electrical-line work.
The installation process is simple.
The existing boiler temperature controllers are changed to wireless temperatures, and a battery-powered wireless temperature controller is installed in each room.
Finally, the manual valve of the hot-water distributor is changed to an electric valve.

System Configuration

Wireless Control System Configuration

KRC-500RF Color Living-Room Wireless Temperature Controller
KRC-500RF Color Living-Room Wireless
Temperature Controller
Control Mode
Temperature : 5℃ ~ 40℃, 1℃Unit
Intermittent heating : 3-4-5-6-9-12-15-20-25-30-60 min/hour
(Automatically set temp. at 30℃)
Timed heating : 24-hour timed heating possible for all rooms, time set by the hour

Specifications
Certified radio communication device (KDT-KRC-500RF)
Wireless communication : 447MHz, bidirectional 2400bps, 3-phase ID configuration,
crossed-lines prevention
Color graphic : 2.8inch TFT 65K Color touch screen, 32bit CPU embedded
Freeze protection : Automatically started when the current temp. drops below 5℃
Dimensions : 72 × 145 × 13mm

Characteristics
Can be easily applied to various heating structures (regional/individual)
without the need to add electric lines
Easy checking and control of the heating status of all rooms with the color screen
KRC-220RF Color Living-Room wireless Temperature Controller
KRC-220RF Color Living-Room wireless Temperature Controller
Control Mode
Temperature : 5℃ ~ 40℃(indoor temp.), 1℃Unit, ice prevention starts at 5℃
Intermittent heating :3-4-5-6-9-12-15-20-25-30-60 min/hour
(Automatically set temp. at 30℃)
OUT mode : Heating OFF when set to the Going OUT mode (autoset temp. at 5℃)

Specifications
Certified radio communication device (KDT-KRC-220RF)
Wireless communication : 447MHz, bi-directional 2400bps,
3 phase ID configuration, crossed lines prevention
Batteries : use approx. 1 year, Alkaline LR6(AA) × 2
Dimensions : 120 × 100 × 23mm

Characteristics
The power consumption during the waiting period is minimal (below approx 18uA)
Hence, the battery use time is long.
MC-3100RF Wireless Valve Control Box
MC-3100RF Wireless Valve Control Box
Specificaions
Boiler connections : Direct communication link with the boiler using the wireless
living-room temperature controller, or uses a repeater
[RB-300/RB-400P] to connect with the boiler room controller
Wireless communication : Communicates with the color living-room wireless
temperature controller. 447MHz bidirectional 2400bps.
3-phase ID configuration, crossed-lines prevention
Certified radio communication device [KDT-MC-3000RF]

* The specifications and characteristics are identical to those of MC-3000
MC-500RF Mini Wireless Valve Control Box
MC-500RF Mini Wireless Valve Control Box
Specificaions
Power : AC220±10% 50/60Hz, Power cord 1M
Temperature controllers : Connections for up to two wireless
Temperature controller (KRC-220RF)
Valve drivers : Choose between AC220V/AC21V - up to 2
Valve hardening prevention function : open 1 time / 72 hours
Wireless communication : 447MHz bi-directional 2400bps,
3-phase ID configuration. prevention of crossed lines
Certified radio communication device (KOT-MC-500RF)
Dimensions : 85 × 85 × 42mm

Characteristics
Perfect for installation in residential housings and officetels with under four zone
Can apply to vatious heating structures with different system conbinations
Creates lowcost systems.
RB-300/400P
RB-300/400P
Specificaions
Power : AC220V±10% 50/60Hz
Power cord : 1M
Connections for KRC-500RF
Boiler connection (RB-300) : Communication linkage or relay contact points
(NO-COM-NC)
Pump Control(RB-400P) : Pump under 600W
Dimensions : 62 × 85 × 42mm
KVA-300 Motorizing Valve
KVA-300 Motorized Zone Valve(Ball Type)
Power consumption : AC21V, 2.5W(While operating)
Motor/cord : AC magnet motor, VCTF 0.5㎟ × 31M
Rotational torque : 20kgf/cm
Permissible valve differential pressure : 4bar
Closing pressure : 10kg/㎠
Operating time : 15seconds - 15seconds (Open - Closed)
Valve Size : 15A, 15S (valve socket)

Special Feature
Electrically safe as it is operated at a low voltage (AC21V)
Easy manual control and identification of open/close state
No direction restraints, allowing free installation
KVA-400 Motorized Zone Valve(Disc Type)
KVA-400 Motorized Zone Valve(Disc Type)
Power consumption : AC21V, 2.5W(While operating)
Motor/cord : AC magnet motor, VCTF 0.5㎟ × 31M
Rotational torque : 20kgf/cm
Permissible valve differential pressure : 4bar
Closing pressure : 10kg/㎠
Operating time : 11seconds - 11seconds (Open - Closed)
Valve Size : 15A, 20A, 25A

Special Feature
Electrically safe as it is operated at a low voltage (AC21V)
Easy manual control and identification of open/close state
Comes with directions (install in the return pipe)