Proper use of heating cables for water

By Admin | Equipment.
22 April 2016
No, even good (modern) heating cables without thermostat for continuous, reliable and economical operation are not suitable, including "samregi"

«Samregi»

"Samreg" or self-regulating heating cable for pipes from freezingof water.Their cling closely to the outside of the pipes (or tubes inside), insulate and include the network and then they are heated tube and prevent water from freezing in them.

Features

What "samreg" self-regulating cable - cheap advertising.Andrew checked out one of the best cables Nelson LT at t = 0 ° C and at t = 10 ° C the difference in power consumption is only 15%.That

- At elevated temperature (of water) to the value when the warming is no longer necessary (plus 10C), the cable continues to warm and pointless waste of a resource of the cable (and these cables is not forever) and electricity (only 15% lessthan zero).Andrew studied the characteristics and some other heating cables ("samregov") - they are not fundamentally different.


Conclusions
For any heating cable should be put off further subsystem, for example - the thermostat (aka - "heat sensors").



following forum member "Home and Cottage" Andrew tells how to collect the heat tracing system for water



If the heating cable is installed on top of the plumbing pipe that runs from the land into the house, his replacement,in case of failure, it becomes a big problem.Even if this problem is easily solved (for example, a cable inside the heated pipe), the reliability of the system (especially in cold weather) still has a very high priority.

winter of 2009-2010, a huge number of people pozamerzali aqueducts.Therefore, as its purpose, it assumes a maximum durability of the heating system.

Sami heating cables have a limited durability, so if they contain as little as possible, then their lifespan will increase accordingly.Energy consumption is also important (especially the permanently turned on heating).

main idea

If the temperature of the pipe is close to t of water in the well or well, it means that it does not make sense and warm, or rather even harmful.Therefore, the shutdown temperature of the cable should be slightly less than the winter (lowest) temperature of the water in your well / well.

How to make the "right" heating system pipes

winter (very cold) water in the well or the well has a temperature t.We take it for clarity equal to - 5 degrees.Take high-quality, durable heating cable (does not matter - "samreg" or not, the main thing - the period of his life and quite a number of on-off), place it along the pipe as it is necessary.There, close to the tube in the cold in its place (probably - on the lower quarter of the distance between the ground and the floor of the house) set the thermostat sensor, and on the thermostat (located in the house) set t turn on 2-3 degrees off and t 34 degrees.

Teploizoliruem entire tube (with the sensor) insulation with a minimum thickness of 20mm (in fact, the more, the better for your wallet in the future).And rightly connect all this to 220V.

get the most optimal variant of the heated tube on the criteria of the resource consumption of electricity and cable.When using the internal heating cable is fundamentally nothing has changed.

If you use a cable without a thermostat (including - "samreg"), the result - cost overruns, as the energies and resources of the cable.And - many times compared to the method described above.

On the choice of the heating cable power

With that Andrew did not understand, but if you do everything "right", then he believes in the power saving is almost meaningless.If the cable is mounted into the pipe, then it is enough heating - 10 W / m, and if the outside, then - 17 W / m.

About thermostat and thermal sensors

Ideally needs a small sealed sensor with remote digital thermostat in the house.If you do not take into account the reliability, there would be perfect: the thermostat TP-35M, or - thermostat TSTAB.Both are designed for DIN-rail.

how not to do
  • Do not, for example, apply the "Resistive Cable Nelson EasyHeat" for heating pipes coming from the well or wells in the house.Why is that?Because there is only turned off when the cable 13 degrees.And at such a high temperature wells, according to Andrew never happen.This means that the cable is always included!And off it manually, for example, in the spring at risk of freezing pipe cold night.
  • temperature sensor should not be installed in the vicinity of the heating cable, otherwise the system will not work properly.It should be put on the opposite side of the pipe heating cables, and carefully insulated from the heating cable (but not from the pipe).
  • Do not use a heater that can get wet (wool), and you can not give the land to compress the insulation.In either case, it is almost cease to insulate.It is possible to use, for example, polyethylene foam top clad rigid pipe.For example, the pipe diameter of 30-50 mm dress regular "stocking" and puts it all into the sewer pipe diameter of 110mm.
Control System Health

Availability thermostat LED "heating" is essential for the control of the entire heating system - frosty winter morning before the first use light water "heating" are supposed to burn, and then do not use a small amount of watermaybe go out for a while.This means that the system is working properly.

also temporarily changing temperature on-off thermostat ("customizing" them under the pipe t) you can watch the switching on / off the indicator.

Andrew claims that his theory is supported by an eight-year practice of using the system.


Posted party forum "Home and Cottage" Andrew
Editor: Roman Adamov