Carrier 24ABR318A0030010, 24ABR318G0030010, 24ABR324A0031010, 24ABR360A0032010, 24ABR360G0032010 Installation Guide
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Installation Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS ....................... 2
INSTALLATION RECOMMENDATIONS ............. 2
INSTALLATION .............................. 3 - 10
Step 1 - Check Equipment & Jobsite ............... 3
Step 2 - Install on Solid Pad ...................... 3
Step 3 - Clearance Requirements .................. 3
Step 4 - Operating Ambient ...................... 3
Step 5 - Install TXV ......................... 3 - 4
Step 6 - Make Piping Connections .............. 4 - 7
Step 7 - Make Electrical Connections ............ 7 - 8
Step 8 - Compressor Crankcase Heater ............. 8
Step 9- Install Electrical Accessories .............. 8
Step 10 - Start-Up ........................... 8 - 9
Step 11 - Check Charge ......................... 10
Step 12 - Final Checks .......................... 10
CARE AND MAINTENANCE ...................... 10
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A05341
Fig, 1 - 24ABR*
*Shown with dense coil guard option
NOTE: Read the entire instruction manual before starting the
installation.
SAFETYCONSIDERATIONS
Improperinstallation,adjustment,alteration,service,
maintenance,orusecancauseexplosion,fire.electricalshock,or
otherconditionswhichmaycausedeath,personalinjury,or
propertydamage.Consultaqualifiedinstaller,serviceagency,or
yourdistributororbranchforinformationorassistance.The
qualifiedinstalleroragencymustusefactory-authorizedkitsor
accessorieswhenmodifyingthisproduct.Refertotheindividual
instructionspackagedwiththekitsoraccessorieswheninstalling.
Followallsafetycodes.Wearsafetyglasses,protectiveclothing,
andworkgloves.Usequenchingclothforbrazingoperations.
Havefire extinguisheravailable.Readtheseinstructions
thoroughlyandfollowallwarningsor cautionsincludedin
literatureandattachedtotheunit.Consultlocalbuildingcodes
andNationalElectricalCode(NEC)forspecialrequirements.
Recognizesafetyinformation.Thisisthesafety-alertsymbolZ_S
Whenyouseethissymbolontheunitandininstructionsor
manuals,bealerttothepotentialforpersonalinjury.Understand
thesesignalwords;DANGER.WARNING,andCAUTION.
Thesewordsareusedwiththesafety-alertsymbol.DANGER
identifiesthemostserioushazardswhichwillresultin severe
personalinjuryordeath.WARNINGsignifieshazardswhich
couldresultinpersonalinjuryordeath.CAUTIONisusedto
identifyunsafepracticeswhichwouldresultinminorpersonal
injuryorproductandpropertydamage.NOTEis usedto
highlightsuggestionswhichwillresultinenhancedinstallation,
reliability,oroperation.
INSTALLATIONRECOMMENDATIONS
NOTE:Insomecasesnoiseinthelivingareahasbeentracedto
gaspulsationsfromimproperinstallationofequipment.
1.Locateunitawayfromwindows,patios,decks,etc.where
unitoperationsoundmaydisturbcustomer.
2.Ensurethatvaporandliquidtubediametersare
appropriateforunitcapacity.
3.Runrefrigeranttubesasdirectlyaspossiblebyavoiding
unnecessaryturnsandbends.
4.Leavesomeslackbetweenstructureandunittoabsorb
vibration.
5.Whenpassingrefrigeranttubesthroughthewall,seal
openingwithRTVorotherpliablesilicon-basedcaulk.
(SeeFig.2.)
6.Avoiddirecttubingcontactwithwaterpipes,ductwork,
floorjoists,wallstuds,floors,andwalls.
7.Donotsuspendrefrigeranttubingfromjoistsandstuds
witharigidwireorstrapwhichcomesindirectcontact
withtubing.(SeeFig.2.)
8.Ensurethattubinginsulationispliableandcompletely
surroundsvaportube.
9.Whennecessary,usehangerstrapswhichare1in.wide
andconformtoshapeoftubinginsulation.(SeeFig.2.)
10.Isolatehangerstrapsfrominsulationby usingmetal
sleevesbenttoconformtoshapeofinsulation.
NOTE: Avoid contact between tubing and structure
ELECTRICALSHOCKHAZARD
Failuretofollowthiswarningcouldresultinpersonal
injuryordeath.
Beforeinstalling,modifying,orservicingsystem,main
electricaldisconnectswitchmustbein theOFF
position.Theremaybemorethan1disconnectswitch.
Lockoutandtagswitchwithasuitablewarninglabel.
OUTDOORWALL-- ,NDOORWAL 7
SULATION___ VAPOR TUBE
THROUGH THE WALL
HANGER STRAP
(AROUND VAPOR
TUBE ONLY) _,/_ _ INSULATION
1" MIN. ---_1 I_-- L LIQUID TUBE
Fig, 2 - Piping Installation
Outdoor unit contains system refrigerant charge for operation
with ARI rated indoor unit when connected by 15 ft. of
field-supplied or factory accessory tubing. For proper unit
operation, check refrigerant charge using charging information
located on control box cover and/or in the Check Charge section
of this instruction.
_,..._JOIST
SUSPENSION
A94026
IMPORTANT: Maximum liquid-line size is 3/8-in. OD for all
residential applications including long line.
IMPORTANT: Always install the factory-supplied liquid-line
filter drier. If replacing the filter drier, refer to Product Data
Digest for appropriate part number. Obtain replacement filter
driers from your distributor or branch.
INSTALLATION
STEP 1 --Check Equipment and Job Site
UNPACK UNIT
Move to final location. Remove carton taking care not to damage
unit.
Inspect Equipment
File claim with shipping company prior to installation if shipment
is damaged or incomplete. Locate unit rating plate on unit corner
panel. It contains information needed to properly install unit.
Check rating plate to be sure unit matches job specifications.
STEP 2 --Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad. tie
down bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in Fig.
3 to determine base pan size and knockout hole location.
For hurricane tie downs, contact local distributor for details and
PE (Professional Engineer) certification, if required by local
authorities.
On rooftop applications, mount on level platform or frame. Place
unit above a load-bearing wall and isolate unit and tubing set
from structure. Arrange supporting members to adequately
support unit and minimize transmission of vibration to building.
Consult local codes governing rooftop applications.
Roof mounted units exposed to winds may require wind baffles.
Consult the Application Guideline and Service Manual -
Residential Split System Air Conditioners and Heat Pumps for
wind baffle construction.
NOTE: Unit must be level to within .+2° (-+3/8 in./ft.) per
compressor manufacturer specifications.
STEP 3 --Clearance Requirements
When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 30-in. clearance to
service end of unit and 48 in. above unit. For proper airflow, a
6-in. clearance on 1 side of unit and 12 in. on all remaining sides
must be maintained. Maintain a distance of 24 in. between units.
Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.
3/8-in. Dia. Tiedown
STEP 4 --Operating Ambient
The minimum outdoor operating ambient in cooling mode is
55°F. and the maximum outdoor operating ambient in cooling
mode is 125°F.
STEP 5 --Install TXV
NOTE: Applies to non-TXV and Puron TXV indoor units
only. If installing a rated and approved indoor coil without a
factory installed R-22 TXV. remove and replace the fixed orifice
or Puron® TXV expansion device with an R-22 TXV.
The thermostatic expansion valve is specifically designed to
operate with R-22. Do not use a Puron® TXV. An existing
Puron® TXV must be replaced with a factory-approved TXV
specifically designed for R-22. Refer to Product Data Sheet for
the appropriate TXV kit number.
UNIT OPERATION HAZARD
0
Failure to follow this caution may result in equipment
damage or improper operation.
All indoor coil units must be installed with a hard shut
off R-22 TXV metering device.
IMPORTANT: If not factory installed, the TXV should be
mounted as close to the indoor coil as possible and in a vertical,
upright position. Avoid mounting the inlet tube vertically down.
Valve is more susceptible to malfunction due to debris if inlet
tube is facing down. A factory-approved filter drier must be
installed in the liquid line.
Installing TXV in Place of Piston
1. Pump system down to 2 psig and recover refrigerant.
2. Remove hex nut from piston body. Use backup wrench on
fan coils.
3. Remove and discard factory-installed piston. Be sure
Teflon seal is in place.
4. Reinstall hex nut. Finger tighten nut plus 1/2 turn.
NOTE: If the piston is not removed from the body, TXV will
not function properly.
View From Top
UNIT BASE PAN
DIMENSIONS
26 X 26
31 1/2 X 31 1/2
35 X 35
Fig, 3 - Tiedown Knockout Locations
On rooftop applications, locate unit at least 6 in. above roof
surface.
TIEDOWN KNOCKOUT LOCATIONS
A
9 1/S
9 1/8
9 1/g
B C
4 7/16 21 1/4
6 9/16 24 11/16
6 9/16 28 7/16
A05177
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Use a brazing shield and wrap TXV with wet cloth or
use heat sink material.
5. Install TXV on indoor coil liquid line. Sweat swivel
adapter to inlet of indoor coil and attach to TXV outlet.
Use backup wrench to avoid damage to tubing or valve.
Sweat inlet of TXV. marked "IN" to liquid line. Avoid
excessive heat which could damage valve.
6. Install vapor elbow with equalizer adapter to suction tube
of line set and suction connection to indoor coil. Adapter
has a 1/4-in. male connector for attaching equalizer tube.
7. Connect equalizer tube of TXV to 1/4-in. equalizer fitting
on vapor line adapter.
8. Attach TXV bulb to horizontal section of suction line
using clamps provided. Insulate bulb with field-supplied
insulation tape. See Fig. 4 for correct positioning of
sensing bulb.
9. Proceed with remainder of unit installation.
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