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©2022 Trane

SS-APG008H-EN

Introduction

Read this manual thoroughly before operating or servicing
this unit.

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.

The three types of advisories are defined as follows:

WARNING

Indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation which, if
not avoided, could result in minor or moderate
injury. It could also be used to alert against unsafe
practices.

NOTICE

Indicates a situation that could result in equipment
or property-damage only accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and Carbon
(HCFCs). Not all refrigerants containing these compounds
have the same potential impact to the environment. Trane
advocates the responsible handling of all refrigerants-
including industry replacements for CFCs and HCFCs such
as saturated or unsaturated HFCs and HCFCs.

Important Responsible Refrigerant
Practices

Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified according to local rules. For
the USA, the Federal Clean Air Act (Section 608) sets forth
the requirements for handling, reclaiming, recovering and
recycling of certain refrigerants and the equipment that is
used in these service procedures. In addition, some states
or municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.

WARNING

Proper Field Wiring and Grounding
Required!

Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as
described in NEC and your local/state/national
electrical codes.

WARNING

Personal Protective Equipment (PPE)
Required!

Failure to wear proper PPE for the job being
undertaken could result in death or serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical
hazards, MUST follow precautions in this manual and
on the tags, stickers, and labels, as well as the
instructions below:

Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/
sleeves, butyl gloves, safety glasses, hard hat/
bump cap, fall protection, electrical PPE and arc
flash clothing). ALWAYS refer to appropriate
Safety Data Sheets (SDS) and OSHA guidelines
for proper PPE.

When working with or around hazardous
chemicals, ALWAYS refer to the appropriate
SDS and OSHA/GHS (Global Harmonized
System of Classification and Labelling of
Chemicals) guidelines for information on
allowable personal exposure levels, proper
respiratory protection and handling
instructions.

If there is a risk of energized electrical contact,
arc, or flash, technicians MUST put on all PPE in
accordance with OSHA, NFPA 70E, or other
country-specific requirements for arc flash
protection, PRIOR to servicing the unit. NEVER
PERFORM ANY SWITCHING, DISCONNECTING,
OR VOLTAGE TESTING WITHOUT PROPER
ELECTRICAL PPE AND ARC FLASH CLOTHING.
ENSURE ELECTRICAL METERS AND
EQUIPMENT ARE PROPERLY RATED FOR
INTENDED VOLTAGE.

Summary of Contents for Odyssey TTA0724 A Series

Page 1: ...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 June 2022...

Page 2: ...that is used in these service procedures In addition some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants Know the app...

Page 3: ...itutes or refrigerant additives WARNING Explosion Hazard Failure to follow instructions below could result in an explosion which could result in death or serious injury and equipment damage NEVER bypa...

Page 4: ...g Routing and Component Selection 9 Liquid Lines 9 Line Sizing 9 Routing 9 Insulation 9 Components 9 Gas Line 10 Line Sizing 10 Routing 10 Insulation 11 Components 11 Expansion Valves 12 Controls 13 H...

Page 5: ...r the evaporator inlet Operational problems can occur if these refrigerant lines are designed or installed improperly Figure 1 Interconnecting refrigerant lines in a typical split air conditioning sys...

Page 6: ...equation based formulas to predict the entrainment velocities of R 410A refrigerant and POE oil These minimum velocities are reflected in the line sizes listed in the component selection summary table...

Page 7: ...contact the manufacturer for review Figure 3 Allowable elevation difference TWA above indoor unit Not allowed for TWA units Note Regardless of orientation hot gas bypass HGBP lines are limited to 75...

Page 8: ...nits Note Route refrigerant piping for minimum linear length minimum number of bends and fittings Important Read Application Guide SS APG008 EN thoroughly before installing this unit Note All liquid p...

Page 9: ...or positioning the components in the liquid line Position the components as close to the indoor unit as possible The Component Selection tables found in Parts p 25 identify suitable components by part...

Page 10: ...th Refrigerant Line Failure to follow instructions could cause a refrigerant line to explode under pressure which could result in death or serious injury Liquid refrigerant trapped between two valves...

Page 11: ...promotes stable TXV operation Avoid Underground Refrigerant Lines Underground lines create risk due to refrigerant condensation during the off cycle installation debris inside the line including conde...

Page 12: ...nsure the condensing unit is capable of operating at these conditions 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...

Page 13: ...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...

Page 14: ...g applications To prevent evaporator freeze up our equipment typically includes Trane Frostat coil frost protection Like hot gas bypass the Frostat system protects the coil from freezing but it does s...

Page 15: ...OD and smaller of type L copper are suitable 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...

Page 16: ...enters the coil quickly turns to liquid The MCHE tube volume holds very little refrigerant so the refrigerant charge of the system is reduced However the tube volume is so small that if the flow of re...

Page 17: ...are a field installed option and no longer come standard from the factory Figure 8 TTA cooling only unit and matched indoor coil typical arrangement Notes 1 If the total length of the liquid line exce...

Page 18: ...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 from the TWA heat pump and install new f...

Page 19: ...and one check valve See Table 3 p 26 and for recommendations 2 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 liqui...

Page 20: ...s away from the coil by 1 inch per 10 feet 1 cm per 3 m 4 Use the DETINT to prevent oil and refrigerant migration when the unit is off The DETINT also serves to isolate the TXV bulb from suction heade...

Page 21: ...10 feet 1 cm per 3 m 4 Use the DETINT to prevent oil and refrigerant migration when the unit is off The DETINT also serves to isolate the TXV bulb from suction header conditions See Line Sizing Routi...

Page 22: ...xpansion valve 3 Pitch the gas line leaving the coil so that it slopes away from the coil by 1 inch per 10 feet 1 cm per 3 m 4 Use the DETINT to prevent oil and refrigerant migration when the unit is...

Page 23: ...e for each expansion valve 3 Pitch the gas line leaving the coil so that it slopes away from the coil by 1 inch per 10 feet 1 cm per 3 m 4 Use the DETINT to prevent oil and refrigerant migration when...

Page 24: ...m 4 Use the DETINT to prevent oil and refrigerant migration when the unit is off The DETINT also serves to isolate the TXV bulb from suction header conditions See Line Sizing Routing and Component Se...

Page 25: ...Unit TTA1804 D TTA1804 C TTA2404 D TTA2404 C TTA3004 C Refrigerant ckts 2 1 Manifold 2 1 Manifold 1 Manifold Minimum step tons 7 5 8 6 13 4 10 12 5 GAS LINE Tube diameter in Horizontal drops 1 1 8 1...

Page 26: ...products require two filters and two check valves one set oriented for liquid in the cooling direction and one set oriented for liquid in the heating direction For units with line lengths in excess o...

Page 27: ...urated at 90 F Discharge Saturated at 125 F Note When calculating refrigerant charge the first step is to determine the unit charge and if the unit charge includes the first 25 foot of pipe This infor...

Page 28: ...For more information please visit trane com or tranetechnologies com Trane has a policy of continuous product and product data improvements and reserves the right to change design and specifications...

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