KFRLWE01 – Retrofit Motor for Angle Seat Valves (LoRaWAN)

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Product Description

The motor drive for angle seat valves (KFR valves) enables the retrofit of existing and already installed shut-off valves into remotely controllable smart devices, without interrupting the water supply or cutting into the water pipe.

The motor is powered by a 12V power supply and is completely water and dust protected (IP67) up to the power supply. Optionally, a battery pack is available for mains-independent operation.

Various adapter rings and a sophisticated connection system enable the use of the motor on all modern angle seat valves from DN15 to DN32. Thanks to an additional water sensor that plugs directly into the device, the motor can be used for leak protection without any additional radio connection.

Control: LoRaWAN Class C – after approx. 20 sec without LoRaWAN, the device automatically accepts LoRa-P2P commands from Aqua-Scope sensors.

Motor Drive Components

Abbr.	Component	Illustration
H	Handwheel
K	Inner Coupler
Ax	Adapter Rings (A1–A4)
D1, D2	Spacer Rings (12 mm, 24 mm)
Ws	Ball Bearing Seat
M	Motor with Button
G	Enclosure
N	Hold-down Bracket

Motor Drive Installation

Mounting on the Shut-off Valve

1. Loosen the screw in the center of the handwheel
2. Remove the handwheel
3. Select adapter A1–A4 (M17, M22, M27, M30)
4. Place ball bearing seat W1–W3 on the spindle (6×6, 7×7, 8×8 mm)
5. Secure the ball bearing seat with a screw
6. Add spacer rings D1/D2 if needed (12 or 24 mm, combinable to 26 mm)
7. Place the enclosure on top
8. Insert the inner coupler (transparent housing for visual inspection)
9. Secure the hold-down bracket with cable ties around the pipe
10. Place the motor head on the enclosure

Mind the Gears

When placing the motor head, ensure that the gears mesh correctly. If there is resistance, slightly rotate the motor.

Wilhelm Ewe GmbH Valves

Insert the split ring (E1+E2) into the 24 mm spacer ring instead of an adapter. Place the small spacer ring (DE) under the ball bearing seat for the grease chamber.

Custom Adapter

If no suitable adapter for the valve seat is available, one must be custom-fitted. Select an adapter that fits over the valve seat and fill the gap with a two-component resin (included with the motor):

1. Cut a piece of the compound with a utility knife
2. Knead until a uniform color is achieved
3. Fill the gaps between the adapter ring and valve base
4. After the resin has cured, use the now custom-fitted adapter ring

Making the Resin Removable

The resin will adhere firmly to the valve. If this is not desired, it helps to lightly coat the valve with oil. The cured adapter ring can then be easily removed.

Similarly, a ball bearing seat can be custom-fitted for a valve spindle with less than 6×6 mm square. Please ensure that the spindle is fitted exactly concentrically in the ball bearing seat.

Setting the End Positions

After the motor is installed and powered, it must determine the correct end positions for OPEN and CLOSE:

1. Manually turn the valve to the OPEN position before mounting the motor for the first time. The optimal OPEN position is approx. 2 turns toward CLOSE after reaching the stop in the OPEN direction (counterclockwise).
2. Power the motor.
3. Press the button once briefly. The motor moves briefly in both directions and detects whether it is in the OPEN or CLOSE position. The LED color indicates the detected position.
4. On the first CLOSE command (via button press or control command), the motor drives to the stop in the CLOSE position and then turns back very slightly – this gasket relaxation protects the rubber gasket in the valve.

Before First Start

The motor must be in the OPEN position when first powered on for automatic calibration to work correctly.

Enabling/disabling gasket relaxation:

If the rubber gasket has become brittle from prolonged closure or aging, the slight reverse turn may cause a leak. The function can therefore be disabled:

• Via app: In the "Configuration" section (when paired with an internet-capable sensor)
• Via button: Hold for 6 seconds (6× buzzer), then release
  • 2× beep + 2× green LED = active (factory default)
  • 3× beep + 3× green LED = disabled

Once the end positions are detected, the motor no longer drives hard against the endpoints but counts the rotations and approaches the endpoints gently.

External Wired Water Sensor

An optional wired flood sensor can be connected to the device. There is a connector on the power cable near the motor. Remove the blue rubber plug and plug in the sensor. Please press the connector firmly to ensure a waterproof connection.

When the sensor head detects water:

• Audible signal sounds
• Valve closes automatically
• Red LED blinks (alarm)
• Alarm message is sent via radio

Once the sensor head is free of water, the alarm can be cleared:

• Hold button for 2 seconds, or
• Via radio (LoRaWAN command or app)

The flood sensor can be extended with a 1.5 m extension ALIEXT01 (available in the shop).

Device Operation

The device has a single button with a built-in tri-color LED. To switch the valve, you can click the button or hold the button for several seconds. The motor beeps every second as a counting aid.

info

The device is designed for outdoor use and prevents malfunctions from water droplets on the button. Therefore, please press the contactless button firmly, even for a short click.

Button Controls

Action	Function
1× click	Toggle motor (open ↔ close)
Hold 2 sec	Deactivate alarm
2× click	Send status report
3 sec + 1 click	Activate button lock
3 sec + 3 clicks	Deactivate button lock
4 sec + 1 click	Motor stays closed after sensor alarm (factory default)
4 sec + 2 clicks	Motor opens immediately after sensor alarm
6× click	Gasket relaxation on/off (2×beep+green = active, 3×beep+green = disabled)
10 sec + 5 clicks	Full motor reset (3×beep + 3× red LED = OK). Only needed for mode change (LoRaWAN ↔ P2P ↔ sensor pairing)

LED Signals

LED	Meaning
Green slow blinking	Valve open
Red slow blinking	Valve closed
Red+Green fast blinking	Motor is moving
Red blinking	Alarm
Red triple blinking	Motor is blocked
Yellow blinking	Searching for radio network

LoRaWAN Communication

See LoRaWAN Connection for setup, keys, and the complete Daisychain Protocol.

Supported Sensor Types

ID	Sensor	Unit
0x01	Temperature	1/10 °C (two's complement)

Alarm Types

ID	Alarm	Value
1	Flood sensor triggered	0x01/0x00
2	Frost risk	current temperature
3	Temperature out of range	current temperature

Configuration Parameters

No.	Parameter	Default	Description
1	Heartbeat	15 min	Reporting interval
2	Message Type	1	Confirmed
3	Temp. Unit	0	Celsius
4	Alarm Repeat	0x0301	—
5	Valve Exercise	0x0107	Every 7 days
6	Local Display	0x0101	LED + Buzzer
7	Temp. Threshold	10	1 °C
8	Motor Power	80%	50–100%
9	Valve Turns	10	Per calibration
10	Auto-Close on Flood	1	Active
12	RX Awake Time	500 ms	Low-Power
13	Sleep Interval	0	Off
14	Wakeup Reports	10	—
15	Second Key	1	Direct pairing
16	Auto-Detect Position	0	On first command
17	Gasket Relaxing	10	1/x turns back

Scope of Delivery

• Motor with power cable (150 cm)
• 4× adapter rings (M17, M22, M27, M30)
• 3× ball bearing seats (6, 7, 8 mm)
• Spacer ring + split ring for Ewe valves
• Bracket + 2 cable ties
• Main enclosure + internal coupler
• 2× spacer rings (12 mm, 24 mm)
• External flood sensor
• Power supply (150 cm)
• Replacement handwheel
• 57 g epoxy resin
• User manual

Technical Specifications

Motor Drive

Parameter	Value
SKU	KFRLWE01
Speed	15 rpm, max. 40 s open/close
Power	10.95 W
Gearbox	1:704, max. 4.5 Nm
Noise	<50 dB
Adapters	M17, M22, M27, M30
Valve Spindle	58–135 mm
Pipe Diameter	DN15–DN32
Weight	380–420 g
Dimensions	70 × 170–195 mm
Motor	~400 mA, standby ~50 mA (12V)
Protection Rating	IP67 (power supply IP20)
Operation	-20 to +60 °C
Storage	-30 to +70 °C
Minimum Wall Clearance	35 mm
Vertical Clearance	175 mm above pipe diameter
Vibration	<10 dB

Radio Communication

Parameter	Value
LoRaWAN	Class C, 868–869 MHz
Range	150–200 m
Activation	OTAA

Further Information

• LoRaWAN Connection
• Technical Support
• Declaration of Conformity
• Disposal Guidelines