MAKING MODERN LIVING POSSIBLE. Thermostatic expansion valves, type T 2 and TE 2 REFRIGERATION & AIR CONDITIONING DIVISION.

Transcription

1 MAKING MODERN LIVING POSSIBLE Thermostatic expansion valves, type T 2 and TE 2 REFRIGERATION & AIR CONDITIONING DIVISION Technical leaflet

2 Contents Page Introduction Features Technical data Superheat Ordering: Components with flare flare connection Flare connections Orifice assembly with filter Components with flare solder connection Solder adaptor Orifice assembly with filter for solder adapter Capacity: R R407C R34a R4A / R Design - Function Identification Dimensions and weights DKRCC.PD.AA0.A2 / 520H659 Danfoss A/S (AC-DSL / SKT), 2-26

3 Introduction Thermostatic expansion valves regulate the injection of refrigerant liquid into evaporators. Injection is controlled by the refrigerant superheat. Therefore the valves are especially suitable for liquid injection in dry evaporators where the superheat at the evaporator outlet is proportional to the evaporator load. Features Large temperature range Equally applicable to freezing, refrigeration and air conditioning applications. Interchangeable orifice assembly easier stocking easy capacity matching better service. Rated capacities from 0.5 to kw (0.5 to TR) for R22. Can be supplied with MOP (Max. Operating Pressure) Protects the compressor motor against excessive evaporating pressure during normal operation. Stainless steel bulb Fast and easy to install. Good temperature transfer from pipe to bulb. Valves for special temperature ranges can be supplied. Technical data Max. temperature Bulb, when valve is installed: C Bulb, element not mounted: 60 C Min. temperature T 2 TE 2: 60 C Max. test pressure PT = 38 bar Max. working pressure PS/MWP = 34 bar MOP-points Refrigerant Range N 40 C +0 C Range NM 40 C 5 C Range NL 40 C 5 C Range B 60 C 25 C MOP-point in evaporating temperature t e and evaporating pressure p e +5 C / +60 F 0 C / +32 F 0 C / +5 F 20 C / 4 F R22 psig/ bar 60 psig/ bar 35 psig/ bar 20 psig/ bar R407C 95 psig/ bar R34a 55 psig/ bar 30 psig/ bar 5 psig/ bar R4A/R psig/9.3 bar 75 psig/ bar 50 psig/ bar 30 psig/ bar Superheat SS = static superheat OS = opening superheat SH = SS + OS = total superheat Q nom = rated capacity Q max = maximum capacity The standard superheat setting SS is 5 K for valves without MOP and 4 K for valves with MOP. The opening superheat OS is 6 K from when opening begins to where the valve gives its rated capacity Q nom. Static superheat SS can be adjusted with setting spindle. Example Static superheat Opening superheat Total superheat SS = 5 K OS = 6 K SH = = K Danfoss A/S (AC-DSL / SKT), 2-26 DKRCC.PD.AA0.A2 / 520H659 3

4 Ordering, components with flare flare connection Thermostatic element with sensor band, without orifice, filter cone, nuts Refrigerant Valve type Pressure equalization ) Capillary tube Connection Inlet outlet ) Range N 40 to +0 C Range NM 40 to 5 C Code no. Range NL 40 to 5 C Range B 60 to 25 C m in. in. mm mm Without MOP With MOP With MOP With MOP Without MOP With MOP R22 TX 2 Int. 3 / Z32 8Z3208 8Z3224 8Z3226 8Z3207 8Z3228 TEX 2 Ext. 3 / Z3209 8Z32 8Z3225 8Z3227 8Z320 8Z3229 R407C TZ 2 Int. 3 / Z3496 8Z356 TEZ 2 Ext. 3 / Z35 8Z357 R34a TN 2 Int. 3 / Z3346 8Z3347 8Z3393 8Z3369 R4A/ R507 TEN 2 Ext. 3 / Z3348 8Z3349 8Z3392 8Z3370 TS 2 Int. 3 / Z34 8Z34 8Z34 8Z3408 8Z34 8Z340 TES 2 Ext. 3 / Z34 8Z34 8Z3407 8Z3409 8Z34 8Z34 ) See the section "Flare connections". Flare connections Connection for copper tubing with outside diameter Reducer for copper tubing with outside diameter in. mm in. mm Code no. /4 6 L 3 / 8 0 L35 /2 2 L /4 6 L07 Example A TE 2 thermostatic expansion valve consists of two elements + flare nuts if required: thermostatic element orifice assembly and flare nuts When ordering one thermostatic expansion valve, TEX 2 with orifice, five code numbers are required: -off thermostatic element, 8Z3209 -off orifice assembly, off 3 / 8 in. flare nut, L35 -off / 2 in. flare nut, L -off / 4 in. flare nut, L Orifice assembly with filter Range N: 40 to +0 C Orifice no. Rated capacity in tons (TR) R22 R407C R34a R4A R507 Rated capacity in kw R22 R407C R34a R4A R507 Code no. 2 ) The rated capacity is based on: Evaporating temperature t e = +5 C for range N and t e = 30 C for range B Condensing temperature t c = +32 C Refrigerant temperature ahead of valve t l = +28 C Range B: 60 to 25 C Orifice no. Rated capacity in tons (TR) R22 R4A R507 Rated capacity in kw R22 R4A R507 Code no. 2 ) )These orifice assemblies cannot be used together with solder adapters. Please see adapter information on next page. 4 DKRCC.PD.AA0.A2 / 520H659 Danfoss A/S (AC-DSL / SKT), 2-26

5 Ordering, components with flare solder connection Thermostatic element with sensor band, without orifice, filter cone, nuts Refrigerant R22 R407C R34a R 4A/ R507 Valve type Pressure equalization 3 ) Capillary tube Inlet Flare TX 2 Int. 3 Connection Outlet ODF solder Range N 40 to +0 C Code no. Range NL 40 to 5 C Range B 60 to 25 C m in. / mm in. mm Without MOP MOP +5 C Mop 0 C Without MOP MOP 20 C /2 8Z328 8Z3287 8Z3357 8Z339 TX 2 Int Z33 8Z3308 8Z3366 8Z336 8Z3276 TEX 2 Ext. 3 /2 8Z3284 8Z3290 8Z3359 8Z3320 TEX 2 Ext Z33 8Z33 8Z3367 8Z3363 8Z3277 TZ 2 Int. 3 /2 8Z3329 TZ 2 Int Z35 8Z354 TEZ 2 Ext. 3 /2 8Z3446 8Z3447 TEZ 2 Ext Z35 8Z355 TN 2 Int. 3 /2 8Z3383 8Z3387 TN 2 Int Z3384 8Z3388 TEN 2 Ext. 3 /2 8Z3385 8Z3389 TEN 2 Ext Z3386 8Z3390 TS 2 Int. 3 /2 8Z344 8Z346 8Z3429 8Z348 8Z3420 TS 2 Int Z3435 8Z3423 8Z3436 8Z3425 8Z3427 TES 2 Ext. 3 /2 8Z345 8Z347 8Z3430 8Z349 8Z342 TES 2 Ext Z3422 8Z3424 8Z3437 8Z3426 8Z )TE valves with inch outlet have /4 inch pressure equalization. TE valves with mm outlet have 6 mm pressure equalization. Solder adaptor The adaptor is for use with thermostatic expansion valves T 2 and TE 2 with flare solder connections. When the adaptor is fitted correctly it meets the sealing requirements of DIN The adaptor offers the following advantages: The orifice assembly can be replaced. The filter can be cleaned or replaced. When using the solder adapter, a special orifice assembly is required. Please use the following tables to select both the appropriate adapter and orifice asembly. Only in this way can the sealing requirements of DIN 8964 be fulfilled. Solder adaptor for filter drier (FSA) may not be used in the T 2 inlet. Flare connections See previous page. Solder adaptor without orifice assembly and filter Connection ODF solder Code no. /4 in mm in mm 8-2 Filter for solder adaptor Description Code no. Filter excl. orifice assembly 8- Orifice assembly with filter for solder adaptor Orifice no. Code no For capacities see previous page. Danfoss A/S (AC-DSL / SKT), 2-26 DKRCC.PD.AA0.A2 / 520H659 5

6 Capacity Capacity in kw for range N: 40 C to +0 C Valve type TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- Orifice no. R Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 30 C Evaporating temperature 20 C Evaporating temperature 40 C Capacity in kw for range B: 60 C to 25 C Valve type TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX TX 2/TEX 2- TX 2/TEX 2- TX 2/TEX 2- Orifice no Evaporating temperature 25 C Evaporating temperature 40 C Evaporating temperature 60 C Evaporating temperature 30 C Evaporating temperature 50 C Correction for subcooling t sub Note: Insufficient subcooling can produce flash gas. The evaporator capacities used must be corrected if subcooling deviates from 4 K. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction factor below. Selections can then be made from the tables above. t u 4 K 0 K 5 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K Correction factor Example Refrigerant = R22 Evaporator capacity Q e = 5 kw Subcooling = 0 K Correction factor from table = 6 Corrected capacity = 5 : 6 = 2 kw 6 DKRCC.PD.AA0.A2 / 520H659 Danfoss A/S (AC-DSL / SKT), 2-26

7 Capacity Capacity in kw for range N: 40 C to +0 C Valve type TZ 2/TEZ TZ 2/TEZ TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ TZ 2/TEZ TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ TZ 2/TEZ TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - TZ 2/TEZ 2 - Orifice no. R407C Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 30 C Evaporating temperature 20 C Evaporating temperature 40 C Correction for subcooling t sub Note: Insufficient subcooling can produce flash gas. The evaporator capacities used must be corrected if subcooling deviates from 4 K. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction factor below. Selections can then be made from the tables above. t u 4 K 0 K 5 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K Correction factor Danfoss A/S (AC-DSL / SKT), 2-26 DKRCC.PD.AA0.A2 / 520H659 7

8 Capacity Correction for subcooling t sub Note: Insufficient subcooling can produce flash gas. Capacity in kw for range N: 40 C to +0 C Valve type TN 2/TEN 2-0. TN 2/TEN TN 2/TEN TN 2/TEN TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2-0. TN 2/TEN TN 2/TEN TN 2/TEN TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2-0. TN 2/TEN TN 2/TEN TN 2/TEN TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2 - TN 2/TEN 2 - Orifice no. R34a Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 30 C The evaporator capacities used must be corrected if subcooling deviates from 4 K. The corrected capacity can be obtained by Evaporating temperature 20 C Evaporating temperature 40 C dividing the required evaporator capacity by the correction factor below. Selections can then be made from the tables above. t u 4 K 0 K 5 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K Correction factor DKRCC.PD.AA0.A2 / 520H659 Danfoss A/S (AC-DSL / SKT), 2-26

9 Capacity Capacity in kw for range N: 40 C to +0 C Valve type TS 2/TES 2-0. TS 2/TES TS 2/TES TS 2/TES TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2-0. TS 2/TES TS 2/TES TS 2/TES TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2-0. TS 2/TES TS 2/TES TS 2/TES TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - Orifice no. R4A / R Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 30 C Evaporating temperature 20 C Evaporating temperature 40 C Capacity in kw for range B: 60 C to 25 C Valve type TS 2/TES TS 2/TES TS 2/TES TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES TS 2/TES TS 2/TES TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES TS 2/TES TS 2/TES TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - TS 2/TES 2 - Orifice no Evaporating temperature 25 C Evaporating temperature 40 C Evaporating temperature 60 C Evaporating temperature 30 C 6.7 Evaporating temperature 50 C Correction for subcooling t sub Note: Insufficient subcooling can produce flash gas. The evaporator capacities used must be corrected if subcooling deviates from 4 K. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction factor below. Selections can then be made from the tables above. t u 4 K 0 K 5 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K Correction factor Danfoss A/S (AC-DSL / SKT), 2-26 DKRCC.PD.AA0.A2 / 520H659 9

10 Design Function General T 2 and TE 2 valves have an interchangeable orifice assembly. For the same valve type and refrigerant, the associated orifice assembly is suitable for all versions of valve body and in all evaporating temperature ranges. The charge in the thermostatic element depends on the evaporating temperature range. The valves can be equipped with internal (T 2) or external (TE 2) pressure equalization. External pressure equalization should always be used on systems with liquid distributors. The double contact bulb gives fast and precise reaction to temperature changes in the evaporator. It also makes fitting the bulb quick and easy. The valves are able to withstand the effects that normally occur with hot gas defrosting. To ensure long operating life, the valve cone and seat are made of a special alloy with particularly good wear qualities.. Thermostatic element (diaphragm) 2. Interchangeable orifice assembly 3. Valve body 4. Superheat setting spindle (see instructions) T 2 0 DKRCC.PD.AA0.A2 / 520H659 Danfoss A/S (AC-DSL / SKT), 2-26

11 Identification The thermostatic element is fitted with a laser engraving on top of the diaphragm. This engraving gives valve type (with code number), evaporating temperature range, MOP point, refrigerant, and max. working pressure, PS/MWP. The code refers to the refrigerant for which the valve is designed: X = R22 Z = R407C N = R34a S = R4A/ R507 45A Orifice assembly for T 2 and TE 2 The orifice assembly is marked with the orifice size (e.g. ) and week stamp + last number in the year (e.g. 74). The orifice assembly number is also given on the lid of its plastic container. Capillary tube label for T 2 and TE 2 The label gives the orifice size () and consists of the lid of the orifice assembly plastic container. It can easily be fastened around the expansion valve capillary tube to clearly identify the valve size. Orifice assembly and filter for T 2 and TE 2 Capillary tube label T 2 and TE 2 Dimensions and weights T 2 and TE 2 Flare flare Flare solder Solder adaptor Weight: 0. kg 0. lb Outlet A Equalization B Weight kg / lb Flare flare /2 flare /4 flare 0.3 / 0.7 Flare solder /2 solder 2 mm solder /4 solder 6 mm solder 0.3 / 0.7 ODF in. mm / / 8 0 Danfoss A/S (AC-DSL / SKT), 2-26 DKRCC.PD.AA0.A2 / 520H659

12 2 DKRCC.PD.AA0.A2 / 520H659 Danfoss A/S (AC-DSL / SKT), 2-26