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SS-APG008-EN

13

Refrigerant Piping Examples

Figure 6.

TTA cooling-only unit and TWE air handler

Figure 7.

TTA cooling-only unit and matched indoor coil (typical arrangement)

Installation notes:

1

If the total length of the liquid line exceeds 80 ft 
(24 m), remove the liquid-line filter drier from 
the TTA and install a new one (

Table 2, p. 20

) at 

the TWE air handler.

1

If the total length of the liquid line exceeds 80 ft 
(24 m), remove the liquid-line filter drier from 
the TTA and install a new one (

Table 2, p. 20

) 

near the indoor coil.

2

Provide one expansion valve (TXV) per 
distributor; see 

Table 4, p. 21,

 for 

recommendations.

Содержание TTA240F Series

Страница 1: ...nd Component Selection for TTA and TWA Split Systems 6 20 Tons Using Refrigerant 410A Model Numbers TTA073D TTA090D TTA120D TTA120E TTA120F TTA150E TTA180E TTA180F TTA240E TTA240F TWA073D TWA120D TWA1...

Страница 2: ......

Страница 3: ...ent our customers and the air conditioning industry All technicians who handle refrigerants must be certified The Federal Clean Air Act Section 608 sets forth the requirements for handling reclaiming...

Страница 4: ...e is a risk of arc or flash technicians MUST put on all necessary Personal Protective Equipment PPE in accordance with NFPA70E for arc flash protection PRIOR to servicing the unit Failure to follow re...

Страница 5: ...f airflow and that provide no more than 45 percent ventilation outdoor air Prospective applications outside this operating envelope including low ambient process and 100 percent outdoor air applicatio...

Страница 6: ...es 2 Equipment Placement 3 Line Sizing Routing and Component Selection 5 Liquid Lines 5 Line Sizing 5 Routing 5 Insulation 5 Components 5 Gas Line 7 Line Sizing 7 Routing 7 Insulation 8 Components 8 E...

Страница 7: ...accumulated over years of observation demonstrates that the lower the refrigerant charge the more reliably a split air conditioning system performs Any amount of refrigerant in excess of the minimum...

Страница 8: ...thin the piping circuit Oil movement through the piping wasn t a concern nor is it today because oil is miscible in liquid refrigerant at normal liquid line temperatures The historic and traditional 6...

Страница 9: ...interconnecting refrigerant line by the shortest and most direct path so that line lengths and riser heights are no longer than absolutely necessary Use only horizontal and vertical piping configurati...

Страница 10: ...iew Figure 2 Allowable elevation difference Cooling only TTA above indoor unit Figure 3 Allowable elevation difference TWA heat pump above indoor unit Figure 4 Allowable elevation difference TTA or TW...

Страница 11: ...tion In fact heat loss from the liquid line improves system capacity because it provides additional subcooling If the liquid line is routed through a high temperature area such as an attic or mechanic...

Страница 12: ...icating ability Use the Installation manual charging curves not the sightglass to determine proper charge levels Expansion Valve The expansion valve is the throttling device that meters the refrigeran...

Страница 13: ...ard the indoor coil Do not install riser traps With field supplied air handler coils what appears to be a riser trap is located at the coil outlet see Figure 5 for an example This piping arrangement w...

Страница 14: ...ngs and joints to verify that the system is leak free insulate the gas lines to prevent heat gain and unwanted condensation Components Adding a gas line filter is unnecessary provided that good refrig...

Страница 15: ...ual distributors 10 2 5 Each TXV should be selected for 5 tons Example 2 10 ton coil one refrigerant circuit with two distributors and a 60 40 coil split 10 x 6 6 and 10 x 4 4 One TXV should be sized...

Страница 16: ...r to the third party Simply stated this means that when a compressor turns on it shouldn t turn off until the expansion valve comes under control And once the compressor turns off it should be allowed...

Страница 17: ...roblems Finally hot gas bypass uses excessive amounts of energy by preventing the compressors from cycling with fluctuating loads Trane now has several years of successful experience with Evaporator D...

Страница 18: ...e for use with R 410A Suction lines 3 1 8 OD must use type K or thicker wall Discharge lines liquid lines heat pump vapor lines and hot gas bypass lines 1 3 8 OD and smaller of type L copper are suita...

Страница 19: ...length of the liquid line exceeds 80 ft 24 m remove the liquid line filter drier from the TTA and install a new one Table 2 p 20 at the TWE air handler 1 If the total length of the liquid line exceeds...

Страница 20: ...cal arrangement shown in cooling mode 1 For applications where the length of the liquid line exceeds 80 ft 24 m and the heat pump will start in the cooling mode remove the liquid line filter driers fr...

Страница 21: ...s one thermal expansion valve TXV and one check valve See Table 3 and Table 4 p 21 for recommendations 2 For applications where the length of the liquid line exceeds 80 ft 24 m and the heat pump will...

Страница 22: ...ble 3 p 21 2 Provide one expansion valve TXV per distributor TWA heat pumps only Provide one check valve for each expansion valve 3 Pitch the gas line leaving the coil so that it slopes away from the...

Страница 23: ...er 10 feet 1 cm per 3 m 4 Arrange the gas line so that suction gas leaving the coil flows downward past the lowest gas header outlet before turning upward Use a double elbow configuration on all lower...

Страница 24: ...3 p 21 2 Provide one expansion valve TXV per distributor TWA heat pumps only Provide one check valve for each expansion valve 3 Pitch the gas line leaving the coil so that it slopes away from the coil...

Страница 25: ...nch per 10 feet 1 cm per 3 m 4 Arrange the gas line so that suction gas leaving the coil flows downward past the lowest gas header outlet before turning upward Use a double elbow configuration on all...

Страница 26: ...eder valve w core LIQUID LINE LIQUID LINE Tube diameter in 1 2 5 8 1 2 1 2 1 2 1 2 1 2 5 8 1 2 5 8 Filter drier DHY01123 DHY01232 DHY01123 DHY01123 DHY01123 DHY01123 DHY01123 DHY01131 DHY01123 DHY0113...

Страница 27: ...6 3 8 VAL08459 1 2 VAL08460 5 8 VAL01722 Valve body VAL01483 valve core COR00006 valve cap CAP00072 The heat pump products require two filters and two check valves one set oriented for liquid in the...

Страница 28: ...r Number SS APG008 EN Date October 2009 Supersedes New Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice O...

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