Table of Contents
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Application Guide
Split System Air Conditioners
Odyssey™
Tube Size and Component Selection
TTA and TWA (6-25 Tons)
(TTA Models)
TTA0724*A/D
TTA0904*A/D
TTA1204*A/C/D
TTA1504*D
TTA1804*C/D
TTA2404*C/D
TTA3004*C
(TWA Models)
TWA0724*A/D
TWA0904*A/D
TWA1204*A/D
TWA1804*D
TWA2404*D
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning
equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person
could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment.
April 2020
S S A A F F E E T T Y Y W W A A R R N N I I N N G G
S S S S - - A A P P G G 0 0 0 0 9 9 G G - - E E N N
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Summary of Contents for American Standard Odyssey TTA Series
- Page 1 Application Guide Split System Air Conditioners Odyssey™ Tube Size and Component Selection TTA and TWA (6-25 Tons) (TTA Models) TTA0724*A/D TTA0904*A/D TTA1204*A/C/D TTA1504*D TTA1804*C/D TTA2404*C/D TTA3004*C (TWA Models) TWA0724*A/D TWA0904*A/D TWA1204*A/D TWA1804*D TWA2404*D S S A A F F E E T T Y Y W W A A R R N N I I N N G G Only qualified personnel should install and service the equipment.
- Page 2 P P R R O O P P E E R R L L Y Y R R A A T T E E D D F F O O R R I I N N T T E E N N D D E E D D V V O O L L T T A A G G E E . . SS-APG009G-EN ©2020 American Standard...
- Page 3 I I n n t t r r o o d d u u c c t t i i o o n n W W A A R R N N I I N N G G W W A A R R N N I I N N G G E E x x p p l l o o s s i i o o n n H H a a z z a a r r d d ! ! F F o o l l l l o o w w E E H H S S P P o o l l i i c c i i e e s s ! ! F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w c c o o u u l l d d r r e e s s u u l l t t i i n n...
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Page 4: Table Of Contents
Table of Contents Overview ........5 Line Sizing . -
Page 5: Overview
Overview The TTA and TWA, 6 – 25 ton condensing unit product Figure 1. Interconnecting refrigerant lines in a typical split air-conditioning system line (specific model numbers are listed on the cover) has been designed for use only with R-410A and POE oil. -
Page 6: Suction Lines
O O v v e e r r v v i i e e w w because oil is miscible in liquid refrigerant at normal refrigerant and POE oil. These minimum velocities are liquid-line temperatures. The historic and traditional 6 reflected in the line sizes listed in the component psid liquid line pressure drop had the unintended selection summary tables, see Parts chapter. -
Page 7: Refrigerant Piping Guidelines
O O v v e e r r v v i i e e w w Refrigerant Piping Guidelines Figure 2. Allowable elevation difference: TTA above indoor unit Contact manufacturer for review Figure 3. Allowable elevation difference: TWA above indoor unit Contact manufacturer for review Figure 4. -
Page 8: Line Sizing, Routing, And Component
Line Sizing, Routing, and Component Selection “Refrigerant Piping Examples,” p. 16 provides located at the TTA/TWA and one located at the illustrations of TTA/TWA split system component evaporator. , lists suitable expansion valves. arrangement. Use them to determine the proper, Liquid Filter Drier relative sequence of the components in the refrigerant lines that connect the TTA/TWA outdoor unit to an... -
Page 9: Gas Line
L L i i n n e e S S i i z z i i n n g g , , R R o o u u t t i i n n g g , , a a n n d d C C o o m m p p o o n n e e n n t t S S e e l l e e c c t t i i o o n n Check Valves W W A A R R N N I I N N G G R R i i s s k k o o f f E E x x p p l l o o s s i i o o n n w w i i t t h h R R e e f f r r i i g g e e r r a a n n t t... -
Page 10: Insulation
L L i i n n e e S S i i z z i i n n g g , , R R o o u u t t i i n n g g , , a a n n d d C C o o m m p p o o n n e e n n t t S S e e l l e e c c t t i i o o n n piping arrangement, which isn’t a riser trap, is the N N o o t t e e : : This is not a trap, but is actually due to the result of two requirements:... -
Page 11: Expansion Valves
Expansion Valves Expansion valves meter refrigerant into the evaporator Each TXV should be selected for 5 tons. under controlled conditions. If there is too much E E x x a a m m p p l l e e 2 2 : : 1 1 0 0 - - t t o o n n c c o o i i l l ( ( o o n n e e r r e e f f r r i i g g e e r r a a n n t t c c i i r r c c u u i i t t ) ) w w i i t t h h refrigerant, the refrigerant will not completely vaporize t t w w o o d d i i s s t t r r i i b b u u t t o o r r s s a a n n d d a a 6 6 0 0 / / 4 4 0 0 c c o o i i l l s s p p l l i i t t and the remaining liquid will slug the compressor. -
Page 12: Controls
Controls The TTA/TWA unit is available with either ReliaTel™ or off, it should be allowed to stay off until the crank case thermostat control. It is important to understand that if heater has warmed up. the staging of compressors is turned over to a third System stability must be programmed in the third party, the compressor protection, provided through party system control. -
Page 13: Hot Gas Bypass
Hot Gas Bypass bypass, the EDC system protects the coil from freezing, Many years ago, hot gas bypass (HGBP) was successfully added to HVAC systems to correct a but it does so by turning off compressors when a number of operational problems. Hoping to avoid such sensor detects the formation of frost on the evaporator problems altogether, it eventually became common coil. -
Page 14: Remodel, Retrofit, Or Replacement
Remodel, Retrofit, or Replacement Inevitably, older condensing unit/evaporator systems These same lines sized at 1-5/8 OD or 2-1/8 OD must that are designed for use with a refrigerant other than use type K or thicker wall. R-410A will need to be upgraded. Due to the phase-out •... -
Page 15: Microchannel Heat Exchanger
Microchannel Heat Exchanger Condensers (MCHE) The microchannel heat exchanger (MCHE) condenser This design improves heat transfer and the refrigerant design is quite similar to the design of an automobile that enters the coil quickly turns to liquid. The MCHE radiator. Refrigerant is distributed to very small tube volume holds very little refrigerant, so the channels in a thin plate. -
Page 16: Refrigerant Piping Examples
Refrigerant Piping Examples Figure 7. TTA cooling-only unit and TWE air handler N N o o t t e e s s : : 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 () at the TWE air handler. - Page 17 R R e e f f r r i i g g e e r r a a n n t t P P i i p p i i n n g g E E x x a a m m p p l l e e s s Figure 9.
- Page 18 R R e e f f r r i i g g e e r r a a n n t t P P i i p p i i n n g g E E x x a a m m p p l l e e s s Figure 10.
- Page 19 R R e e f f r r i i g g e e r r a a n n t t P P i i p p i i n n g g E E x x a a m m p p l l e e s s Figure 11.
- Page 20 R R e e f f r r i i g g e e r r a a n n t t P P i i p p i i n n g g E E x x a a m m p p l l e e s s Figure 12.
- Page 21 R R e e f f r r i i g g e e r r a a n n t t P P i i p p i i n n g g E E x x a a m m p p l l e e s s Figure 13.
- Page 22 R R e e f f r r i i g g e e r r a a n n t t P P i i p p i i n n g g E E x x a a m m p p l l e e s s Figure 14.
- Page 23 R R e e f f r r i i g g e e r r a a n n t t P P i i p p i i n n g g E E x x a a m m p p l l e e s s Figure 15.
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Page 24: Parts
Parts Table 2. Component selection for TTA cooling microchannel units 6–25 tons Unit TTA0724*A TTA0724*D TTA0904*A TTA0904*D TTA1204*A TTA1204*D TTA1204*C TTA1504*D Refrigerant ckts 1 (Manifold) Minimum step (tons) 6.25 GAS LINE Tube diameter (in.) Horizontal (& drops) 1 1/8 1 1/8 1 3/8 1 1/8 1 3/8... - Page 25 P P a a r r t t s s Table 3. Component selection for TWA heat pump units 6–20 tons Unit TWA0724*A TWA0724*D TWA0904*A TWA0904*D TWA1204*A TWA1204*D TWA1804*D TWA2404*D Refrigerant ckts Minimum step (tons) 3.75 GAS LINE Tube diameter (in.) Horizontal (&...
- Page 26 P P a a r r t t s s Table 5. R-410A lbs charge per 100 ft Liquid Discharge Suction 0.04 1.25 0.18 5/16 0.07 2.15 0.31 0.12 3.45 0.51 0.22 6.43 0.94 0.36 10.33 1.51 0.53 15.42 2.26 0.74 21.42 3.14...
- Page 27 N N o o t t e e s s SS-APG009G-EN...
- Page 28 American Standard has been creating comfortable and affordable living environments for more than a century. For more information, please visit americanstandardair.com. American Standard has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.
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