Application Guide

APP-APG013-EN Date: September 2010

Low Outdoor Operating TemperatureUnit MountingMinimum ClearancesRefrigerant Piping Limitations

Trane XL16i heat pumps and cooling units

Non-Communicating XL16i split systems

The purpose of this bulletin is to provide cumulative application criteria as related to the Trane XL19icooling units and heat pumps.

This bulletin discusses:I. Off season cooling operationII. Compressor crankcase heat applicationIII. Unit mountingIV. Minimum operating clearancesV. Refrigerant piping limitations

ISSUED BY:Product Training and Application DepartmentTraneTyler, Texas

POSITION STATEMENT :Trane has always recommended installing Trane approved, matched indoor and outdoor systems.The benefits of installing approved matched systems are maximum efficiency, optimum performance,and best overall system reliability

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,

may result in minor or moderate injury. It may also be used to alert against unsafepractices.

CAUTION – Indicates a situation that may result in equipment or property-damage-

only accidents.

Warnings and Cautions may appear throughout this manual. Read these carefully.

Section I - Off Season Cooling OperationThe Trane XL16i may be operated in the cooling mode to 55oF as shipped from the factory. These unitsshould only be matched with AHRI listed air handling units and furnace coils. Trane AHRI ratedsystems only include indoor coils with factory supplied non - bleed TEV’s.Please refer to table 1 when determining if the XL16i will operate at the specified conditions as well asrequired accessories.

Evaporator Defrost Control Kits (EDC)AY28X079 - Cooling only

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A0001E6306RTT4 103THCCYAB 062TKSKYAB A0001E6306RWT4yrotcaFdellatsnI

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A0001E8406RTT4 103THCCYAB 062TKSKYAB A0001E8406RWT4yrotcaFdellatsnI

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Figure 1 -Climatic Zones for United StatesSection II - Compressor Crankcase Heat Requirements for Split Heat Pumps:

Compressor crankcase heat is required in Climatic Zones 1, 2,and 3 for all heat pump applications.Reference Table 2 for crankcase heater selection.

Low ambient applications and natural air movement resulting from prevailing wind may impact the HVACsystem’s ability to maintain a reasonable operating head pressure; therefore, when applying any split systemcondensing unit or heat pump unit where cooling mode operation is required below 450F, provisions shouldbe made to deter prevailing winds from naturally flowing across the outdoor unit’s coil. The effects ofprevailing winds become more evident as the wind speed increases and the outdoor ambient tempera-ture decreases. Section A describes one method of constructing a windshield.

Windshields:

NOTES:National Electrical Code requires minimum three feet clearance from the service panel. Some localbuilding departments will allow a removable panel in front of the unit service access area. Other-wise the distance between the windshield and the unit’s service access is required to be a minimumof three feet. Please reference page 15 of this document for National Electric Code information.

A) Fence construction.1) Height shall not exceed the top of the unit more than indicated in figure 2.2) Free air passages shall be sized at no greater than 300 FPM velocity.3) Free air passages shall be cut at the lower portion of the fence.4) Fence may also be undercut to allow free air passage provided grass, vegetation, or debris willnot obstruct the free air passage.5) Shrubbery shall not be planted within one foot of the fence.6) If removable panel is utilized, the distance from the unit’s service panel to the removablepanel may be reduced to 2.0 feet. (3.0 feet if geographical location’s design outdoor dry bulbis greater than 1050 F.)

Keep unit panels clear from snow build-up during system operation.

Figure 2 - Windshield Design

Typical wiring when using the evaporator defrost control (EDC) for operation as specified on page 3.Figure 3 - Cooling Split System and AY28X079 Evaporator Defrost Control

R

Y1

Y2

G

W

W2

B

Red (R)

BK

Y2

Green (G)

White (W1)

White (W2)

White (W3)

Blue (B)

R

Y 2

Y 1

G

W1

X2

B

O

EDR-1

EDC

EDR

Y 1

Red (R)

Y

BKGreen (G)

White (W1)

White (W2)

White (W3)

Blue (B)

EDC

Figure 4 - Heat Pump Split System and AY28X084 Evaporator Defrost Control

4TTX6 4TEEThermostat

4TEE

Warning! High voltage present in the outdoor unit and indoor unit. Assure high voltagepower is disconnected using lockout / tag-out procedures if applicable prior to con-necting low voltage wiring.

B

Y2

R

Y2

Y1

X2

B

O

Thermostat4TWX6

Y low - Not used

Y low - Not used

O

O

Note: Remove factoryinstalled jumper between Rand BK at the fan controlboard. Connect R to O onthe terminal strip. These terminalson the AHU / Gas furnace must bejumpered together. Please refer tothe equipment’s installation manualfor complete control wiring.

Drawing for illustration purposes only

Section III- Unit Mounting:This section describes appropriate methods for mounting and securing the XL16i. However, if these unitsare to be mounted in a region where high winds are an issue, a Trane BAYECMT*** extreme conditionsmounting kit may be utilized. In regions where seismic restraint is a requirement, consultation with andapproval from a local P.E. may be required for the restraining method. All methods of restraint are subjectto be approved by the authority having jurisdiction. (reference figures 3 and 4 for base pan layout)

A. When mounting or securing the Trane XL16i condensing units please observe the following:1. If the unit is to be supported from the edge, the supporting material must extend two inches

minimum under the perimeter of the unit’s base.2. The middle of the unit shall be supported.3. There are no mounting holes in the base-pan. If securing the unit to a pad, plate or rails, the base-pan

may be drilled through.4. Washers shall be placed in between the fastener head and the base-pan.5. For hurricane or high wind applications, if using the BAYECMT*** kit, the bolt hardness and

diameter is specified in the BAYECMT*** installation guide.a) Bolt length is determined by the authority having jurisdiction and / or local P.E.b) Mounting surface and weight shall be determined by the authority having jurisdiction and / orlocal P.E.c) For non-ground installations, refer to a local P.E.d) A local P.E. may be required if the BAYECMT*** kit is used or not.

BASE PAN MOUNTING HOLE LOCA TIONS(location only, holes must be drilled)

If supporting the base pan from the perimeter, the support mustextend under the base pan at least 2”. Trane recommends support-ing the middle of the base pan with a cross member.

supportunit

center

Figure 5 - Illustration of pad mount Figure 6

Section IV - Minimum Operating ClearancesThis section discusses installing the XL16i condensing unit where spacing is limited. When installingTrane outdoor units in a location where clearance to other units, walls, fences, etc. is limited, theconcerns listed below must be addressed:

1. System Operation - Adequate airflow must be provided into and away from the condensing inorder to enable appropriate heat transfer.2. System Serviceability - Sufficient working space must be allowed for the HVAC service techni-cian to perform service and routine maintenance on the condensing unit. Furthermore, space mustbe allowed for major component change out in the event of a failure. Working space is determinedby the Local, State and National Codes. (See National Electric Code Table 110.26 for explanation.)3. Space Maintenance - Appropriate space surrounding the unit is required for maintenance of thegrounds where the units are positioned.4. State, Local Codes, and National Codes shall prevail. Consult the authority having jurisdictionbefore installation to assure compliance.

Many projects require consideration of minimum clearances between outdoor units and adjacent walls,fences and other units. The obstruction in question is usually one of the following:

1. One or more walls of an adjacent building.2. Fences or barriers provided to reduce sound transmission or visually screen the equipment.3. Other outdoor units in a multi-unit installation.4. A combination of the above.5. Overhangs

The prime considerations involved in establishing minimum clearances are:1. Adequate airflow to the outdoor coil with minimum recirculation.2. Service access to the equipment.3. Compliance with the National Electric Code and other applicable codes.4. Design temperature - Design temperatures greater than 105F require additional consideration.

I. In order to ensure adequate airflow reaches the condensing unit, size free air passages at 300 feetperminute maximum velocity. Condensing unit airflow values are available in table 4.

II. The importance of providing proper service access to equipment cannot be overemphasized. TheHVAC service technician’s job may be performed with greater ease and lower cost if adequateservicespace is allowed.

III. Knowledge of the National Electric Code and other codes that apply to the job site location is anecessity to satisfy local inspectors. These codes are in place for serviceability as well as safety.

IV. Be sure to read all provisions and footnotes contained in this document.

V. Where ASHRAE design temperatures exceed 105F, minimum operating clearances may increase.

A. Installation of single XL16i unit under a deck.1. Single XL16i units may be installed under a deck providing the following criteria are met:

a) 3 feet minimum top clearance is provided.b) 3 feet away from obstructions such as a wall, or shrubbery on two sides.c) The other two sides left unobstructed.d) Decking material overhanging the unit not to exceed two feet on two sides.e) Serviceability - Adequate space provided for annual service and maintenance. NationalElectric Code (NEC) requires minimum 3 feet service clearance for personnel safety. Thisdistance may be increased under certain conditions. Please refer to the most current edition ofthe National Electric Code for moreinformation. Page 15 of this document contains someNEC information.f) Condensing unit shall be set on firm foundation independent from building structure, notdirectly on ground surface. (Figure 7 through 11 for illustration purposes only)g) Consult with local building department to assure the installation will comply with localcode before installing the equipment.

Illustrations provided to designate required clearances. Trane recommends mounting / setting the unit ona pad that is independent of the structure. Reference section III of this document

Figure 7 - Minimum Clearance Illustration for under deck applications

3’ Minimum clearance from 2 sides of unit to walls

2’ feet maximumoverhang fromside of unit to deck.

3’ minimumfrom top ofunit to deck

Outdoor Unit

SIDE VIEW

Front View

3’ minimum fromside of unit towall of home

Outdoor Unit

2’ maximumdeck overhang

to side of unit

Illustrations provided to designate required clearances

Illustrations provided to designate required clearances. Trane recommends mounting / setting the unit on a pad that isindependent of the structure. Reference section III of this document

Figure 8 - Minimum clearance front view illustration for under deck applications

Figure 9 - Minimum clearance side view Illustration for under deck applications

Wall of home

Patio Edge

Deck Edge

2’ Maximum overhangfrom side of unit toedge of deck

2’ Maximum overhangfrom side of unit toedge of deck

3’ Minimum Clearancefrom side of unit to

wall of structure

Outdoor Unit

Outdoor wallof home

Deck Edge

TOP VIEW

ISOMETRIC VIEWIllustrations provided to designate required clearances. Trane recommends mounting / setting the unit on

a pad that is independent of the structure. Reference section III of this document

Figure 10 - Minimum clearance top view Illustration for under deck applications

Figure 11 - Minimum clearance isometric view Illustration for under deck applications

B. Single XL16i condensing unit / heat pump in a corner with unrestricted top clearance1) For locations where the design ambient temperature is below 105F:

a) 1.5 feet clearance from both walls.b) Other two sides left unrestricted

2) For locations where the design ambient temperature exceeds 105F:a) 2.0 feet clearance from both walls.b) Other two sides left unrestricted.

3) If unit is located in such a way that service panel is facing the walla) NEC requires minimum 3 feet between the unit and the wall 1) This space may be increased to 3 1/2 feet. Consult the National Electric Code for more information regarding minimum clearances for working spaces.

C. Installation of two or more XL16i units where two adjacent walls form a corner.1) For locations where the design ambient temperature is below 105F:

a) Corner unit shall have1.5 feet clearance from both walls.b) 3.0 feet clearance in between units. ( if service panels face each other, this clearance may beincreased to 4.0 feet per NEC)c) 2.0 feet clearance from other side to any obstruction

2) For locations where the design ambient temperature exceeds 105F:a) 2.0 feet clearance from both walls.b) 3.0 feet clearance in between units. ( if service panels face each other, this clearance may beincreased to 4 feet per NEC)c) 2.0 feet clearance from other side to any obstruction.

3) If unit’s are located in such a way that the service panels are facing the walla) NEC requires minimum 3.0 feet between the unit and the wall 1) This space may be increased to 3 1/2 feet. Consult the most current edition of the National Electric Code for more information regarding minimum clearances for working spaces.

SERVICE ACCESS PANEL SIDE

Service Panel

Service Panel

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-1.5

’-m

in

-1.5

’-m

in

-1.5’-m i n

-1.5

’-m

in

-1.5

’-m

in

-1.5

’-m

in

-1.5’-m i n

-3.0’-m i n

-3.0’-m i n

Figure 12 Figure 13

Figure 14

D. Single XL16i condensing unit / heat pump in a fenced corner with unrestricted top clearance1) For locations where the design ambient temperature is below 105F:

a) 1.5 feet clearance from both walls.b) 2.0 feet fence clearance - openings shall be provided to allow free air passage to unit. ( Free airpassage shall be sized @ 300 FPM Velocity)c) Service access shall be 3.0 feet minimum

2) For locations where the design ambient temperature exceeds 105F:a) 2.0 feet clearance from both walls.b) 3.0 feet clearance from fence - openings shall be provided to allow free air passage to unit.(Free air passage shall be sized @ 300 FPM Velocity)c) Service access shall be 3.0 feet minimum.

3) If unit is located in such a way that service panel is facing the walla) NEC requires minimum 3 feet between the unit and the wall 1) This space may be increased to 3 1/2 feet. Consult the National Electric Code for more information regarding minimum clearances for working spaces.

Service Panel

Service Panel

-1.5’-m i n

-1.5

’-m

in

-1.5

’-m

in

-1.5’-m i n

123456123456

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123123123123123

123123123123123

-2.0

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-3.0’-m i n

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Single Unit - Solid FenceSolid Fence: Fence height not to exceed top of unit. Provide openings in fence that will allow maximum 300 FPM air velocity.These openings shall be located at the lower portion of the fence. If acceptable, the lower portion of the fence may be cut toprovide open bottom clearance provided that debris, grass and vegetation will not obstruct air passageway.

* If removable panels are used and acceptable to local inspection agency, the clearance to the removablepanel may be reduced to 2.0 feet

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opening size @300 FPM maximumvelocity

Figure 15 Figure 16

Figure 17

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Multiple Units Solid Fence

* If removable panels are used and acceptable to local inspection agency, the clearance to theremovable panel may be reduced to 2.0 feet

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123456123456123456

opening size @300 FPM maximumvelocity

SERVICE ACCESS PANEL SIDE*

-2.0

’-m

in

-2.0

’-m

in

-2.0

’-m

in

-1.5’-m i n

-3.0’-m i n

-3.0’-m i n

E. Installation of two or more XL16i units where two adjacent walls form a fenced corner1) For locations where the design ambient temperature is below 105F:

a) Corner unit shall have1.5 feet clearance from one wall and 2.0 feet clearance from the other wall.b) 3.0 feet clearance in between units.c) NEC requires 3 feet clearance for service. This may be reduced to 2.0 feet if removable panelsare used.d) Free air passage shall be cut in order to allow maximum 200 FPM air velocity

2) For locations where the design ambient temperature exceeds 105F:a) Corner unit shall have 2.0 feet clearance from one wall and 2.5 feet clearance from the otherwall.b) 3.5 feet clearance in between units.c) NEC requires 3 feet clearance for service. This may be reduced to 2.5 feet if removable panelsare used.

3) If unit’ s are located in such a way that the service panels are facing the walla) NEC requires minimum 3.0 feet between the unit and the wall 1) This space may be increased to 3 1/2 feet. Consult the most current edition of the National Electric Code for more information regarding minimum clearances for working spaces.

Solid Fence: Fence height not to exceed top of unit. Provide openings in fence that will allow maximum 300 FPM air velocity. Theseopenings shall be located at the lower portion of the fence. If acceptable, the lower portion of the fence may be cut to provide openbottom clearance provided that debris, grass and vegetation will not obstruct air passageway.

-3.0

’-m

in

-3.0

’-m

in

-3.0

’-m

in

-1.5’-m i n

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Figure 18

Figure 19

Service Panel

-3.0’-m i n

-6.0

”-m

in3

.0’-

min

3.0’ minunrestricted top clearance shallbe provided.

Service Panel

-3.0’-m i n

-6.0

”-m

in-3

.0’-

min

3.0’m i n

-6.0

”-m

in

-3.0

’-m

in

3.0’m i n

unrestricted topclearance shallbe provided.

Service Panel

-6.0

”-m

in

-3.0

’-m

in

3.0’m i n

G. Installation of a multiple condensing units / heat pump units with one side facing wall, fence, orother obstruction with fr ee air space on top using the BAYVDTA*** ver tical air discharge kit.

1) For locations where the ASHRAE design ambient temperature is below 110oF:a) 6.0 inches clearance on 1 side. Three feet minimum clearance required from other threesides from any obstructions.b) Service access side requires 3 feet minimum clearance. Consult Local, State, andNational Electric Codes for minimum service clearance.

2) For locations where the ASHRAE design ambient temperature exceeds 110oF:Do not restrict any one side less than 1.0 feet. Refer to the unit’s installation manual or theminimum clearance section of this document for more information regarding unit clearances.

The example installations below require replacing the XLi WeatherguardTM Top with the appropriateBAYVDTA*** ver tical air discharge accessory kit from Trane.

Condensing units may be rotated so the service panels face each other, however, three feet minimum clearance shall be provided

1.0 feet minimumclearance required fromwall where ASHRAE designcondition exceeds 1100F

1.0 feet minimumclearance required fromwall where ASHRAEdesign condition exceeds1100F

F. Installation of a single condensing unit / heat pump with one side facing wall, fence, or otherobstruction with fr ee air space on top using the BAYVDTA*** ver tical air discharge kit.1) For locations where the ASHRAE design ambient temperature is below 110oF:

a) 6.0 inches clearance on 1 side. Three feet minimum clearance required from other threesides from any obstructions.b) Service access side requires 3 feet minimum clearance. Consult Local, State, andNational Electric Codes for minimum service clearance.

2) For locations where the ASHRAE design ambient temperature exceeds 110oF:Do not restrict any one side less than 1.0 feet. Refer to the unit’s installation manual or theminimum clearance section of this document for more information regarding unit clearances.

Figure 20

Figure 21

Section V - Minimum Clearances from Vents: (See Figure 21)This section deals specifically with installations in which a dryer vent, kitchen exhaust vent, or furnace vent islocated near the condensing unit / heat pump unit.

A. Condensing units and heat pumps shall be located not less than five feet from clothes dryer vents.1. Do not locate the condensing unit / heat pump unit directly below a clothes dryer vent.

B. Condensing units and heat pumps units shall be located not less than three from any kitchenexhaust vent.1. Do not locate the condensing directly under a kitchen exhaust vent.

C. Condensing units and heat pump unit shall be located not less than three feet vertically fromany natural gas appliance vent outlet or inlet in which the condensing unit / heat pump unit iswithin a 10 feet diameter of the appliance vent termination.

5’

3’

Dryer Vent

FurnaceVent

3’

5’

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Gutter or other acceptable means to prohibit directcontact by roof run-off water may be utilized ifclearance is not available from building structure.

Kitchen Exhaust Vent

D. Code Compliance:1. Local, State and National codes shall be adhered to for all installations.

E. Manufacturers Instructions:1. Always consult the manufacturer’s instructional manuals. These manuals contain informa-tion specific to the device or appliance being installed.

F. Vents other than discussed in this document:1. The intent of this document is not to discuss every possible venting device or all types ofgasses, vapors, and spaces that are mechanically vented or naturally vented by draft. Pleaseconsult local, state and national codes. In the absence of codes, or if the installer is unfamiliarwith local, state and national codes, a professional engineer or local building departmentshould be utilized as a resource.

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10’

Figure 22

Electrical Code Information

Compliance with Local, State, and National Codes is a must on every HVAC Installation. This pagediscusses the criteria regarding minimum working spaces as defined in the 2008 National Electric Code.The main concern is the safety of the HVAC service / maintenance person. Minimum working clearancesare specified in the National Electric Code (NEC) Article 110.26

For electrical equipment that from ground to power the voltage is 600 volts or less:The National Electric Code specifically states that service area around electrical equipment shall providesufficient access, and shall be properly maintained in order to permit safe operation and maintenance of theequipment. Table 110.26 as well as the figures beside the table describes the minimum clearance forproper service and access to electrical equipment.

Trane residential and light commercial condensing units ranging from 1 to 5 ton require access to the sideservice panel as indicated on the previous pages to gain access to the electrical controls.

Condition 1(3 ft min. for 151 - 600 V)

Condition 2(Space would increase to 3 1/2 ft for 151 - 600 V)

Condition 3(Space would increase to 4 ft for 151 - 600 V)

Minimum Clear Distance

Condition 1 Condition 2 Condition 3

NominalVoltage to

Gr ound

0-150 900 mm (3 FT) 900 mm (3 FT) 900 mm (3FT)

151-600 900 mm (3FT) 1 M (3.5FT) 1.2 mm (4FT)

Note: Where the conditions are as followsCondition 1 - Exposed live parts on one side and no live or grounded partson the other side of the working space, or exposed live parts on both sideseffectively guarded by suitable wood or other insulating materials. Insulatedwire or insulated bussbars operating at not over 300 volts to ground shall notbe considered live partsCondition 2 - Exposed live parts on one side and grounded parts on theother side. Concrete, brick, or tile walls shall be considered as grounded.Condition 3 - Exposed live parts on both sides of the work space (notguarded as provided in Condition 1) with the operator between.

Table 110.26(A)(1) Working Clearances

The table and figure below are excerpts from the National Electric Code 2002:

Reprinted with permission from NFPA 70-2008, National Electrical Code®, Copyright © 2008, National FireProtection Association. This reprinted material is not the complete and official position of the NFPA on thereferenced subject, which is represented only by the standard of its entirety.

National Electrical Code and NEC are registered trademarks of the National Fire Protection Association, Quincy, MA.

Electricswitchboard

150V nominalor less

Effectively Insulated

Electricswitchboard

150V nominalor less

Electricswitchboard

150V nominalor less

Electricswitchboard

150V nominalor less

ExposedLive Parts

ExposedLive Parts

ExposedLive Parts

Grounded parts, concrete, etc

3’

3’

3’

Figure 23

Required Opening = CFM / 300 FPMExample:Given:Qty of 2 units in an area surrounded by a fence on two sides and solid walls on the other two sides. Unitsare 4TTX6048E100A’s -Required:Determine free air opening space required in fence -Solution:4260 CFM X Qty of 2 = 8520 CFM8520 CFM / 300 FPM = 28.4 square feetThese two systems require 28.4 square feet of free air opening in the 2 fence sections surrounding the units.

*Table produced July 2010. For the most current information, please refer to specific equipment Product Data.

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A0001E8406XTT4 0624 A0001E8406XWT4 0624

A0001E0606XTT4 0674 A0001E0606XWT4 0674

XL16i Unit Dimensions

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A0001E6306XTT4 4 )8/735(9631 )4/173(649 )4/143(078 A0001E6306XWT4 4 )8/735(9631 )4/173(649 )4/143(078

A0001E8406XTT4 4 )8/735(9631 )4/173(649 )4/143(078 A0001E8406XWT4 4 )8/735(9631 )4/173(649 )4/143(078

A0001E0606XTT4 4 )8/735(9631 )4/173(649 )4/143(078 A0001E0606XWT4 4 )8/735(9631 )4/173(649 )4/143(078

Figure 24

Section V - Refrigerant PipingA. Purpose

1. Liquid line - The purpose of the liquid refrigerant line is to convey refrigerant, in the liquid state, fromthe outdoor unit to the indoor unit in the cooling mode and from the indoor unit to the outdoor unit in theheating mode.2. Vapor line - The purpose of the vapor line is to convey refrigerant in the vapor state and oil from theindoor unit to the outdoor unit in the cooling mode and from the outdoor unit to the indoor unit in theheating mode.

B. Limitations:1. The XL16i contains a single unloading compressor. Therefore, it is crucial that refrigerant lines areproperly sized and do not exceed the length set forth in the unit’s installation manual.2. Line length limits:

A. Vapor line = 80 feet linear length / of the linear length, 25 feet may be installed vertical.B. Liquid line = 80 feet linear length / of the linear length, 25 feet may be installed vertical.

3. No exceptions shall be allowed to these piping limitations.C. Explanation:

1. Refrigerant lines shall not exceed 80 feet total line length. / 25 feet of the 80 feet may be vertical. .2. Liquid sub-cooling may not be achieved on first stage if the liquid line exceeds 80 feet.3. Oil return may be sacrificed during first stage operation if the vapor line exceeds 80 feet.

25 Ft. Max

55 Ft. Max

80 Feet Max.

55 Ft. Max

25 Ft. Maxvertical

Figure 25

Trane6200 Troup HighwayTyler, TX 75707http://www.trane.com

Literature Order NumberFile Number APP-APG013-EN 09/10Supersedes XL16i-APG-ENStocking Location Electronic

Since Trane has a policy of continuous product improvement, it reserves the right to changedesign and specifications without notice