GB 6932-2015Domestic gas instantaneous water heater (English PDF)

3.2 Low calorific value netcalorificvalue Q

1 Under the standard condition 1m3 (or 1kg) complete combustion gas heat released, latent heat of the water vapor does not include the heat released.

3.3 Water temperature fluctuations temperaturefluctuation In the case where the water and the set water temperature remains constant, the difference between the maximum and minimum temperature of hot water.

3.4 Apply pressure appliedwaterpressure Water relative maximum and minimum values of the static pressure of the water heater can withstand normal operating manufacturer nameplate.

3.5 Heat load (heat flux) heatinput The fuel combustion heat released per unit time in the burner, i.e., the product gas of low heating value and the volume flow in the same state.

3.6 Nominal heat load (heat flux nominal) ratedheatinput Heat load under a predetermined reference atmospheric conditions. This value is the nominal value of the product nameplate, unit of kW (1kW = 3.6MJ/h).

3.7 Minimum heat load (minimum heat flux) minimumheatinput At a nominal gas pressure, thermal load is minimal when operating gas flow conditions.

3.8 Gas supply pressure gassupplypressure In the gas inlet of the water heater, measured relative static pressure at runtime.

3.9 Thermal efficiency thermalefficiency Effective use of incomplete combustion gas heat accounted for a percentage of the total heat release.

3.10 Hot water production capacity hotwaterproductioncapacity 0-2 gas condition, water heater at maximum heat load state, the water pressure was 0.1MPa, the conversion temperature Deltat = 25K Hot water per minute out of time.

3.11 Rated output hot water capacity ratedproductioncapacityofhotwater Product nameplate nominal value, hot water production capacity given by the manufacturer.

3.12 Water pressure watersupplypressure Measured at the inlet of a relative static pressure in normal use.

3.13 Flame-flamelift Burner flame from the fire hole to leave all or part of the phenomenon.

3.14 Tempering lightback Flame inside the burner ignites.

3.15 Huang Yan yelowflame (Contact with the cold body) to form a yellow flame at the top of the combustion flame cone.

4.1 Classification

4.1.1 The use gas type heater, and the mounting position to the exhaust mode, the intended use, the heating hot water circulation means for categorizing.

4.1.2 divided by type of gas used. artificial gas water heaters, gas heaters, water heaters LPG. Classification of various gas Code and the rated supply pressure are shown in Table 1. Table

1 Gas Category Code Type of gas Rated gas supply pressure/Pa Artificial gas 3R, 4R, 5R, 6R, 7R 1000 natural gas 3T, 4T, 6T 1000 10T, 12T 2000 LPG 19Y, 20Y, 22Y 2800

4.1.3 installation position and by way of the exhaust gas to the classification shown in Table 2. Table 2 and to the mounting position of the exhaust way classification Code Name schematic classification of content referred to Natural exhaust type From the combustion chamber when the air required by the exhaust pipe from However, the suction force of the flue gas to the outside row Flue D in FIG.

1 Forced exhaust When combustion air is taken from the desired chamber, through the action of the fan under Forced through the flue gas exhaust pipe to the outside row Q strong emission FIG. 2a),

b) Natural to exhaust Will exhaust pipe connected to the outdoor use of natural suction force chamber External air supply and exhaust fumes to the outside P balanced FIG 3a) Forced to exhaust An exhaust pipe connected to the outdoor will by forcing blower chamber External air supply and exhaust fumes to the outside G forced to exhaust FIG. 3b) FIG outdoor food Outdoor W can only be installed outdoors 4 FIG indoor NATURAL vent type 1

b) the wind type FIG

4.2 Model

4.2.1 Model Type Type hot-water heater is divided into food, heating, dual heater, condensing water heater.

4.2.2 hot water heater models

4.2.2.1 constitute

4.2.2.2 Code JS

--- represents domestic hot water gas instantaneous water heater for heating water.

4.2.2.3 Installation position and to exhaust mode D

--- Natural exhaust type; Q

--- forced exhaust; P

--- Natural to exhaust; G

--- forced to exhaust; W

4.2.2.4 main parameters The rated thermal load (kW) digits after rounding.

4.2.2.5 Characteristics No. We designed by the manufacturer, the number of bits is not limited. Example.

4.2.3 heating, water heaters, dual-use model

4.2.3.1 constitute

4.2.3.2 Code JN

--- represents a heating home heating gas water heater; JL

--- represents a domestic hot water heating and dual-use gas water heater.

4.2.3.3 installation position and to exhaust mode With 4.2.2.3.

4.2.3.4 cycle way K

4.2.3.5 main parameters The rated heat input (kW) after taking the whole digit.

4.2.3.6 Characteristics No. We designed by the manufacturer, the number of bits is not limited. Example.

4.2.4 condensing water heater models

4.2.4.1 constitute In addition to the code should be consistent with

4.2.3 heating hot water heaters, models constitute rules of dual-use water heaters.

4.2.4.2 Code

--- represents JSL condensing heating household water gas instantaneous water heater for heating water; Heating the JNL

--- represents a household condensation heating gas water heater; JLL

--- denotes a condensation type hot water supply and home dual-type gas instantaneous water heater's heating. Example 1. Example 2.

4.2.5 font format Type the characters that appear in all uppercase characters.

5.1.1 General Materials

5.1.1.1 during the normal life of the heater, the material should be able to withstand the contemplated mechanical, chemical and thermal effects.

5.1.1.2 material in contact with the gas and combustion products, should be corrosion resistant or corrosion-resistant after treatment.

5.1.1.3 combustion chamber housing should be made of metal material.

5.1.1.4 material involving water heater safety changes, its characteristics manufacturer shall be guaranteed.

5.1.1.5 in contact with an acidic material should be resistant to corrosion or condensate with a protective corrosion resistant coating.

5.1.1.6 prohibit the use of asbestos-containing materials.

5.1.2 Material in contact with the water

5.1.2.1 metallic material in contact with water, during the service life, the material should guarantee against corrosive effects, shall withstand the mechanical, chemical and thermal Movies Ring, and should not pollute the water.

5.1.2.2 plastic materials in contact with water during the service life, the material should meet the mechanical, physical and chemical performance requirements, UV resistance, aging, corrosion The impact should not pollute the water.

5.1.2.3 Other nonmetallic and auxiliary materials, rubber, sealants, adhesives and lubricants used in the moving parts in contact with water or the like, not dirty Dyed water quality.

5.1.3 Material gas line

5.1.3.1 piping system components should be corrosion resistant, m.p. than 350 °C metallic material or a non-combustible material (sealing, the lubricating material except).

5.1.3.2 made in copper or soft copper tube and to the surface treatment of carbon steel for a gas delivery tube, the inner tube surface for corrosion protection coating Layer treated to prevent corrosion of sulfide gas.

5.1.3.3 The materials used, such as oil seal, gasket, etc. In addition to meeting the performance requirements of a seal, the gas should be corrosion-resistant.

5.1.4 Materials burner

5.1.4.1 burner should be corrosion-resistant, metallic material melting point greater than 700 deg.] C or non-combustible materials, may not affect the use of the defect.

5.1.4.2 burner flame port portions of the above stainless steel or equivalent corrosion and temperature resistant materials should be used.

5.1.4.3 nozzle, nozzle carriage, adjustable air board should be made of metal or non-combustible materials deg.] C melting point greater than 500, and has a corrosion resistance. twenty one

5.1.4.4 ignition burner air supply pipe of a metal material is not less than the inner diameter 2mm, melting point greater than 500 deg.] C should be used.

5.1.5 heat exchanger material The heat exchanger is connected to the hot water heater and the combustion chamber, should be corrosion resistant, is greater than the melting point of the metal material 700 deg.] C.

5.1.6 material by means of the flue gas

5.1.6.1 NATURAL exhaust gas water heater exhaust pipe should be made of metal or corrosion resistant surface is corrosion-resistant material over the metal, Which should meet the corrosion UV and long-term outdoor use of anti-rust capability, the thickness of the metallic material should satisfy the necessary wind energy Force (lateral load is applied to 1.5kN/m2 in the exhaust pipe side). Shall not be used as a natural aluminum corrugated tube water heater exhaust gas exhaust pipe.

5.1.6.2 forced exhaust, natural to exhaust, forced exhaust pipe to the exhaust gas water heater is equipped with an exhaust pipe or to the thickness should be not less To

0.3 mm (nominal dimensions) and in the stainless steel of austenitic steel in 3280 GB/T , or the thickness not less than 0.8mm (nominal ruler Inch) carbon steel plate treated sided enamel, or equivalent level with more corrosion-resistant, flame temperature, and other material properties. The sealing member, the pad should be A flexible corrosion-resistant materials.

5.1.7 Case Material Corrosion-resistant materials should be used or a corrosion-resistant surface over which the sealing member, a flexible pad with corrosion-resistant materials. Outdoor hot Water trap housing should also conform to the requirements of UV resistance.

5.2 Structure General Structure 5.2.1

5.2.1.1 heater member should take into account the design and manufacture of safe, strong and durable, reliable overall structure, not during normal operation Due to damage or affect the use of functional failure.

5.2.1.2 portion of each connecting member (e.g., bolts, etc.) should be strong, reliable, food can be easily fixed to the wall or the floor, can not use Loose.

5.2.1.3 The water should penetrate into the gas passage.

5.2.1.4 can produce a self-tapping screw type can not be applied to the chips based on the gas communicating passage portion.

5.2.1.5 food designed to be easy to clean and service, parts of the surface should be smooth hand may contact mus...