Honeywell Home Pipe Stat - White - L641B1004
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Product Information
Full details
The Honeywell Home L641B1004 Pipe Stat is designed for homeowners and heating engineers seeking reliable low-limit or frost protection for heating and hot water systems. Its key benefit is providing essential temperature control to prevent freezing and maintain system efficiency, though its surface-mounting design may require specific installation considerations. This thermostat utilizes a bi-metal strip sensor to monitor pipe temperatures, offering a range of -10°C to 40°C and is particularly suited for pumped heating circuits.
All features
| Colour | White |
|---|---|
| Model Part Number | L641B1004 |
| Brand | Honeywell |
Extended Product Information
FAQs
What is the primary purpose of the Honeywell Home L641B1004 Pipe Stat?
Its primary purpose is to provide low-limit or frost protection for heating and hot water systems by monitoring pipe temperatures and activating the system when temperatures fall too low.
What is the operating temperature range of this thermostat?
The thermostat has an operating temperature range of -10°C to 40°C.
How is the thermostat installed?
It is designed for surface mounting and is typically clamped or tied directly onto the pipework or hot water cylinder.
Can this thermostat be used with any type of heating system?
It is ideal for pumped systems and is designed for domestic hot water cylinders and heating circuits where low-limit or frost protection is required.
Does this thermostat have a digital display?
No, the Honeywell Home L641B1004 Pipe Stat does not have a digital display; it uses a mechanical bi-metal strip sensor and an adjustment dial.
Who should install this thermostat?
Installation, including electrical wiring, should be performed by a qualified electrician or heating engineer to ensure safety and compliance with regulations.
Can I use this thermostat for full heating control?
No, this thermostat is specifically designed for low-limit and frost protection, not for full room or system temperature regulation.
Troubleshooting
Thermostat not activating the heating system when cold
Ensure the thermostat is correctly positioned on the pipe for good thermal contact. Verify the temperature setting is appropriate for the desired low-limit. Check electrical connections are secure and that power is supplied. Consult a qualified engineer if issues persist.
Heating system runs continuously despite warm temperatures
Check that the thermostat has not been set to an excessively high low-limit temperature. Ensure the sensor is not in direct contact with a heat source other than the pipework. Verify there are no wiring faults.
Inaccurate temperature readings
Confirm the thermostat is securely clamped to the pipe with no air gaps between the sensor and the pipe surface. Ensure the ambient temperature around the thermostat is not artificially high or low.
Pros and Cons
Pros
- Provides crucial frost and low-limit protection for heating systems.
- Simple and reliable mechanical operation with a bi-metal strip sensor.
- Designed for straightforward surface mounting on pipes or cylinders.
- Suitable for a wide range of ambient and system temperatures.
- Can be integrated with other Honeywell thermostats like the T4360A Frost thermostat.
Cons
- Requires manual installation and wiring by a qualified individual.
- Surface mounting may not be suitable for all pipe configurations or locations.
- Limited to basic low-limit and frost protection functions; not a programmable thermostat.
- The display is absent, meaning status is determined by system operation.
- Only suitable for specific applications (low limit/frost) rather than full heating control.
Setup, Compatibility & Care Instructions
Setup: This thermostat is designed for surface mounting. It should be securely attached to the pipework or cylinder using appropriate clamps or ties (not supplied) to ensure good thermal contact. The electrical connections should be made by a qualified electrician in accordance with relevant wiring regulations. The temperature setting is adjusted via a dial on the thermostat.
Compatibility: The L641B1004 is intended for use with low-limit or frost protection functions in domestic heating and hot water systems, particularly those that are pumped. It can be used in conjunction with other control devices, such as the T4360A Frost thermostat, for enhanced protection.
Care: The thermostat requires minimal care. Keep the area around the thermostat clean and free from dust or debris. Ensure the sensor has good contact with the pipe. Avoid using harsh cleaning chemicals; a slightly damp cloth is sufficient for cleaning the exterior.