【 Weak current College 】 ground heating engineering solutions to common problems

Floor heating technology is a certain scientific and technological content of new building installation technology, the negligence of any engineering, construction capability shortfalls, the overall impact of project quality, will leave for the user's use. Therefore the floor heating system in operation prior to commissioning work is important, in the few years of work I summarizes some resolve to debug issues tips for your reference.
First, the leakage

In the debugging process leakage problems appear relatively more, if you are prescribed the loading pipe parts with SOAP and water leakage and pressure test to detect and easily law resolution. If you find a subtle heating pipe indoor leakage phenomenon, so how can you accurately identify leaking point is critical. First under construction drawings to determine which loop leakage, and single-loop suppression experiments to confirm that the loop overall regulatory requirements for removal of re-coil, taking into account the serious loss of planing on ground, cons, or copper beam joints leak points, but not the simple way to avoid the effect later promoted across the system running, to tenants have trouble; if a user is found in the decoration of this proposal is to reduce the loss of a simple connection method.

Indoor water proof requirements of bathroom and kitchen in the laying of floor radiant heating pipe, due to construction on the basis of each province, and City Hall, issued by the engineering construction standard of the low-temperature radiant floor heating in the technical specification for application did not specify that if the construction unit of the construction process is not perfect, real estate developer knowledge is inadequate, debugged stage individual waterproof room prone to leaks, water-proof room once, water will shun the room around the infiltration and Shun polystyrene Board insulation layer has poured into the Interior, plus floors to the road again the gap to the downstairs seepage. In this issue on my company based on past successful experience in construction, take the following approach:

1. waterproof in warm regions of cement mortar protection cushion construction has been completed, the laying of polystyrene Board insulation, wall-plate margin dimensional ≥ 100mm, no telescopic belt along the wall expansion, door Department without polystyrene Board insulation, door Department thermal water-stop strip coil set, after conducting site pipe laying indoor overall pouring concrete fill layer, thereby increasing the concrete fill layer and wall and door local ground paste strength, dense and wholeness, on humid conditions has a barrier effect.

2, the waterproofing layer over floor heating concrete fill layers above the entrance to the Office conducting coil parts set the Strip, so basically solved the toilet water flows to the problem of indoor water intrusion.

Second, the heating temperature too low

If the heating pipe drawings design and length with space heating requirements, with regard to check from the system.
1, the building is in a location near heat sources.
2. main system pressure pipeline meets 0.4MPa above.
3, main line filters and drop filter is blocked, the ball valve is open.
4. whether waste gas pipeline valve opened in place.
5. diversity water for gas.
6. the road is clear. geothermal energy tubes
7, risers in the backwater spread rumours is blocked.
8, gas pipes the valve is opened in place, is clear.
9. water intake in charge of directing the temperature reaches the temperature design requirements.
10. check pipes and riser connections is level.
Now cite two examples:
Example 1:

During debugging, a range of indoor heating warm are not reach the design temperature, from the unit heating effect, in the above article, most likely is the second issue, i.e. the unit in charge of road from trench is relatively far away, coupled with the lack ofcompetent pressure, causing slow circulation, into large temperature differences in the backwater, thus affecting the room temperature.
Fine-tuning suggestions: 1. open the big main line valve inlet valve and the backwater. 2. If the above methods
Does not work, you can set the cell parts fit small gas valve, on 3-5 days. 3. where such measures still does not work, you must consider increasing the main system pressure pipeline, i.e. the building landlord backwater channels plus pump (power according to the specific circumstances), to force the loop.
Example 2:
A household in the system during debugging found insufficient floor heating room heating, after much effort tracking survey, finding the reasons for as follows:

In the not to take any additional measures, the measured water temperature is between 40-43 ° c, the living room temperature up to 17 ° c, up to 14 North bedroom temperature 15 ° c, South» bedroom temperature up to 11 ~ 12 degrees centigrade.

Fine-tuning measures: the system sets the service for single-branch water tanks with circulation pump, the purpose is to enhance thermal cyclic pressure pipeline network. Measured water temperature is between 40-43 ° c, up to a temperature of 18 ° c in the living room, bedroom temperature up to 15 North ~ 16 ° c, up to 12 South bedroom temperature ~ 13 degrees centigrade. The average temperature of 1 ° c, the effect is not evident, therefore excluding insufficient thermal cyclic pressure pipeline network.
Fine-tuning measures II: the system sets the service for single-branch water tanks directly after being work South bedroom loops, measured, South the bedroom temperature increase of 2 ° c.

Fine-tuning measures: measures taken in one of three loops at the same time increase of 1 per loop flow meters, flow measurements. The result: the living room to 0.172m3/h, North bedroom to 0.175m3//h, South bedroom a 0.162m3//h. The conclusion is: three loops are not blocked, but velocity is low, should increase the circulation pump flow.
Analysis: design North-South problem correction factor does not exist, the coil spacing is not a problem because there is a problem on community planning, according to reflect South bedroom a day without sunshine, the resulting temperature enough,
To completely resolve work problems have to be broached heating surface, re-laying coil.

In floor heating system is running, there will be room temperature is too high, there may be two reasons: one is the outdoor weather parameter is higher than the design parameters for the return water temperature not be adjusted;Design of coil spacing is too thick. If the former adjustment for backwater temperature; if the latter, it is recommended that appropriate down main line inlet valve and the backwater valve; if single-family temperature is too high, then appropriately down work into, backwater valve.

To sum up, in order to achieve good heating effect needs from design, materials, construction, and strictly control checks, to ensure that the floor heating system commissioning, running well, you must choose a powerful, has extensive construction experience of professional floor heating for their overall operations, control, responsible, so as to avoid future trouble.