CARRIER Package Units(both Units Combined) Manual L0605138

User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides

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Page Count: 32

£n to the Expertg

Installation Instructions

NOTE: Read the entire instruction manual before starting the

installation.

NOTE: Installer: Make sure the Owner's Manual and Service

Instructions are left with the unit after installation.

TABLE OF CONTENTS

Page

SAFETY CONSIDERATIONS ........................ 2

INTRODUCTION .................................. 2

RECEIVING AND INSTALLATION ................ 2-16

Check Equipment ................................. 2

Identify Unit ................................... 2

Inspect Shipment ................................ 2

Provide Unit Support .............................. 2

Roof Curb ..................................... 2

Slab Mount .................................... 2

Ground Mount ................................. 2

Provide Clearances ................................ 2

Rig and Place Unit ................................ 7

Inspection ..................................... 7

Introduction .................................... 7

Use of Rigging Bracket ........................... 7

Select and Install Duc_vork .......................... 9

Converting Horizontal Discharge Units to Downflow

(Vertical) Discharge Units ......................... 9

Provide for Condensate Disposal ..................... 9

Install Electrical Connections ....................... 11

High- Voltage Connections ....................... 11

Routing Power Leads Into Unit .................... 11

Connecting Ground Lead to Ground Screw .......... 11

Routing Control Wires .......................... 11

Accessory Installation ........................... 16

Special Procedures for 208-v Operation ............. 16

PRE-START-UP .................................. 17

START-UP ....................................... 17

Unit Start-Up ................................ 17-23

Sequence of Operation ............................ 20

Check for Refrigerant Leaks ........................ 20

Start-Up Adjustments ............................. 20

Checking Cooling and Heating Control Operation ..... 20

Checking and Adjusting Refrigerant Charge .......... 22

Refrigerant Charge ............................. 22

No Charge .................................... 22

Low Charge Cooling ............................ 22

To Use Cooling Charging (;harts ................... 22

Indoor Airflow and Airflow Adjustments ............ 22

Defrost Control .................................. 22

Quiet Shift .................................... 22

Defrost ...................................... 22

Emergency Heat/Cool Mode ........................ 22

Fig. 1-Unit 50CR

A05307

MAINTENANCE ............................... 24-28

Air Filter ....................................... 25

Indoor Blower and Motor .......................... 25

Outdoor (;oil, Indoor Coil, and Condensate Drain Pan .... 25

Outdoor Fan .................................... 25

Electrical Controls and Wiring ...................... 26

Refrigerant Circuit ................................ 26

Indoor Airflow .................................. 26

Metering Devices-TXV & AccuRater Piston .......... 26

Pressure Switches ................................ 26

Loss-of-Charge Switch ........................... 27

High-Pressure Switch ............................. 27

Copeland Scroll Compressor (Puron (_:Refrigerant) ....... 27

Refrigerant System ............................... 27

Refrigerant ................................... 27

Compressor Oil ................................ 27

Servicing Systems on Roofs with Synthetic Materials ... 27

Liquid-Line Filter Drier ......................... 28

Puron (R-410A) Refrigerant Charging .............. 28

System Information ............................... 28

Loss-of-Charge Switch ......................... 28

Check Defrost Thermostat ........................ 28

TROUBLESHOOTING ............................. 28

START-UP CHECKLIST ........................... 28

SAFETYCONSIDERATIONS

Installationandservicingofthisequipmentcanbehazardousdueto

mechanicalandelectricalcomponents.Onlytrainedandqualified

personnelshouldinstall,repair,orservicethisequipment.

Untrainedpersonnelcanperformbasicmaintenancefunctionssuch

ascleaningandreplacingairfilters.Allotheroperationsmustbe

performedbytrainedservicepersonnel.Whenworkingonthis

equipment,observeprecautionsintheliterature,ontags,andon

labelsattachedto orshippedwiththeunitandothersafety

precautionsthatmayapply.

Followallsafetycodes.Installationmustbeincompliancewith

localandnationalbuildingcodes.Wearsafetyglasses,protective

clothing,andworkgloves.Havefireextinguisheravailable.Read

theseinstructionsthoroughlyandfollowallwarningsorcautions

includedinliteratureandattachedtotheunit.

Recognizesafetyinformation.Thisisthesafety-alertsymbolZ_X

When you see this symbol on the unit and in instructions or manuals.

be alert to the potential for personal injury.

Understand these signal words: DANGER. WARNING, and

CAUTION. These words are used with the safety-alert symbol.

DANGER identifies the most serious hazards which will result in

severe personal injury or death. WARNING signifies hazards which

could result in personal injury or death. CAUTION is used to

identify unsafe practices which may result in minor personal injury

or product and property damage. NOTE is used to highlight

suggestions which will result in enhanced installation, reliability, or

operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect

switch. Turn off accessory heater power switch if applicable.

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in unit component

damage.

Puron (R-410A) systems operate at higher pressures than

standard R-22 systems. DO NOT use R-22 service

equipment or components on Puron (R-410A) equipnmnt.

Ensure service equipment is rated for Puron (R-410A).

INTRODUCTION

The 50CR heat pump is fully self-contained and designed for

outdoor installation. Standard units are shipped in a

horizontal-discharge configuration for installation on a

ground-level slab. Standard units can be converted to downflow

(vertical) discharge configurations for rooftop applications.

RECEIVING AND INSTALLATION

Step 1--Check Equipnmnt

IDENTIFY UNIT

The unit model number and serial number are printed on the unit

informative plate. Check this information against shipping papers.

INSPECT SHIPMENT

Inspect for shipping damage while unit is still on shipping pallet. If

unit appears to be damaged or is torn loose from its anchorage, have

it examined by transportation inspectors before removal. Folavard

claim papers directly to transportation company. Manufacturer is

not responsible for any damage incurred in transit. Check all items

against shipping list. Immediately notify the nearest Carrier Air

Conditioning office if any item is missing. To prevent loss or

damage, leave all parts in original packages until installation.

Step 2--Provide Unit Support

For hurricane tie downs, contact distributor for details and PE

Certificate (Professional Engineering) if required.

ROOF CURB

Install accessory roof curb in accordance with instructions shipped

with curb (See Fig. 2). Install insulation, cant strips, roofing, and

flashing. Ductwork must be attached to curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical

for a water tight seal. Install gasketing material supplied with the

roof curb. Improperly applied gasketing also can result in air leaks

and poor unit performance.

Curb should be level to within 1/4 in. (See Fig. 3). This is necessa U

for unit drain to function properly. Refer to accessory roof curb

installation instructions for additional information as required.

SLAB MOUNT

Place the unit on a solid, level concrete pad that is a minimum of 4

in. thick with 2 in. above grade. The slab should extend

approximately 2 in. beyond the casing on all 4 sides of the unit (See

Fig. 4). Do not secure the unit to the slab except when required by

local codes.

GROUND MOUNT

The unit may be installed either on a slab or placed directly on the

ground if local codes permit. Place the unit on level ground prepared

with gravel for condensate discharge.

Step 3--Provide Clearances

The required minimum service clearances are shown in Fig.6 and 7.

Adequate ventilation and outdoor air must be provided. The

outdoor fan draws air through the outdoor coil and discharges it

through the top fan grille. Be sure that the fan discharge does not

recirculate to the outdoor coil. Do not locate the unit in either a

corner or under an overhead obstruction. The minimum clearance

under a partial overhang (such as a normal house overhang) is 48 in.

above the unit top. The maximum horizontal extension of a partial

overhang must not exceed 48 in.

IMPORTANT: Do not restrict outdoor airflow. An air restriction at

either the outdoor-air inlet or the fan discharge may be detrimental

to compressor life.

Do not place the unit where water, ice. or snow from an overhang

or roof will damage or flood the unit. Do not install the unit on

carpeting or other combustible materials. Slab-mounted units

should be at least 4 in. above the highest expected water and runoff

levels. Do not use unit if it has been under water.

base_ [[[ .......

/Screw _ @

/(NOTE A) _§

/slur, :';allg_ "_ _ WOOd nailer*_Fla

I u0p, ______41K ilFdbRooz urb.

[ It:i:::tl _ Insulation(field

Roofing m_, II supphed)

/ field supplied II.

\II vs!:!tl II_ Ductwork

\ __Jtl H field supplied]

Roof Curb for Small Cabinet

Note A: When unit mounting screw is used,

retainer bracket must also be used.

Roof Curb for Large Cabinet

Note A: When unit mounting screw is used,

retainer bracket must also be used.

Retlm opening

(BXC)

deck paq

Sho_

Suppod

Long

Suppod

E D

R/A

Insulated

deck pan

_Gasket around_

duct

Gasket around

outer edge \

'N\\

S/A

UNIT SIZE

500R024-036

500R042-060

NOTES:

ODS CATALOG A B

NUMBER IN. (aM) IN. (aM)

CPRFCURB006A00 8 (203) 11 (279)

CPRFCURB007A00 14 (356) 11 (279)

CPRFCURB008A00 8 (203) 16-3/16 (411)

CPRFCURB009A00 14 (356) 16-3/16 (411)

1. Roof curb must be set lip for unit being installed.

IN. (MM)

16-1/2 (419)

17-3/8 (441)

IN. (MM)

28-3/4 (730)

40-1/4 (1022)

IN. (MM)

30-3/8 (771)

41-15/16 (1065)

IN. (MM)

44-5/16 (1126)

44-7/16 (1129)

A05308

IN.(aM)

45-15/16 (1167)

46 - 1/16 (1169)

46-1/16 (1169)

2. Seal strip nlust be applied, as required, to unit being installed.

3. Dimension in ( ) are in millimeters.

4. Roof curb is made of 16 gauge steel.

5. Table lists only the dimensions, per part nmnber, that have changed.

6. Attach ductwork to curb (flmlges of duct rest on curb).

7. Insulated pmlels: I in. thick fiberglass 1 lb. density.

8. Dimensions are in inches.

9. When unit mounting screw is used (see Note A). a retainer bracket must be used as well. This bracket must also be used when required by code for hurricane or seismic

conditions. This bracket is available throt_gh Mierometl.

Fig. 2- Roof Curb Dimensions

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

A-B B-C A-C

1/4 1/4 1/4

Fig. 3 - Unit Leveling Tolerances

C99065

EVAR COIL COND. COIL

Fig. 4 - Slab Mounting Detail

Fig. 5 - Corner Weights (Lbs.)

CORNER WEIGHTS (SMALL CABINET)

Unit

Total Weight

Corner Weight 1

Corner Weight 2

Corner Weight 3

Corner Weight 4

024 030

349 349

70 70

54 54

84 84

141 141

036

373

150

"uO

CORNER WEIGHTS (LARGE CABINET)

Unit

Total Weight

Corner Weight 1

Corner Weight 2

Corner Weight 3

Corner Weight 4

042 048

438 463

88 98

68 61

106 127

177 177

C99096

A06114

O6O

499

1O7

136

186

[33R]

406 5

16001

§480

SUPPLY

TOP VIEW

_T98 6

63144]

FUL OUViR e

BRAN EI

/96[0 75] N P T

X R2 060 8T D P

3266

5703

[2245

l- 42 T

1_ 681

[iEB5i i

8310

[B2 72i

LEFT SIDE VIEW

11938

! £O_PRESSOR SLOWER, ELECTRIC RDAT

& ELECTRICAL ACCESS PANEL

1226 3

148 28]

FRONT VIEW

UNil

5OSROR4

5OCBORO

5BCR038

ELECTRICAL

C_ARACTERiSTiCS

208 230 I60

ROS/RRO 1 60, 2081230 R 60

208/230 l 60 ZOS/230 R 60

UNiT WT UNIT NEIGBT i CENTER OF GRAVIIY MNIIN

349 1158 3 9911i3902) I §OBO[£OO] 4S9B[193i 1 447 O[iT6]

349 ilRS 3 991113902i i 5OBO[ROO] 4S90[195i i 4470[i_6]

373 i169R %419i4/02] i 508 01200] R556[140i i RR02{iSO]

DONNER WEGT LBS /_G

ABC s

024 70/3 7 54/24 5 84138 ' 14!/64 0

050 70 3 54/D4 5 84/38 il4 /64 0

056 513 2_iRB/26 3

REQUIRED CLEARANCES TO DOMBU$_BLE MAlL MiiLiMETPRS [iNi

lOP O_ UNIT ...................... 3566 [i4OO}

DUCT SIDE O? U_iT ............. 50 8 iROOi

S_SE OPPOSITE SUCTS ........................ 3566 [_4OO}

BOTTOM OF UNIT ..................... 12 7 (050]

ELECiRIC HEAl PANEL ...................... 9i44 [3600}

NED. REQ_RED CLEARANCES.

MiLLiMETDRS [i_]

BETWEEN UNTIE, POWER ENIRY SiBE .............. 10668 [4200_

UNIT AND UNGROSNSDD SURPACBS, POWER ENTRY SIDE ..... 9140 [3800i

UNII AND BLOCK OR CONCNDTE WALLS AND OTHER

GROUNSES SURFACES, POWER ENTRY SIDE ............. 10668 [4E00i

REQUIRED CLEARANCE FOR OF'_ATION AND SERVICING

MiLLiMETERS [i_i

EVAP DOll ASCBSS SiDE ....................... 9140 [3600]

PO_ER ENIRY SISE ....... 9i40 [3600}

(EXCEPT FOR NED RDOUIREMENTS)

UNIt TOP .......... 9!40 [3600}

S;SE OPPOSITE SUETS ...................... 9140 [3600}

DUCT PANDL 304 8 [i2 00]=

=_INiMU_ D[SIA_CESziP U_iT _S PLACEO LESS INAN 304 8 [12 00i PROM WALL

SYSTDM,TNE_ STETS# PERFORMANCE MAYSE COMPROMISES

BI_4ENSIONS iN [] ARE IN INSBES

22 R [0 88] BIA HOLE

CONTROL ENTRf_ \

2 ST62

[10 87] IR4T

t issoi

87/

{3 43} L_:LID`

[4 S11

RIGHT SIDE VIEW

"''"'_--" i•

i"SUPeL_

BUCT j

4020 OPENING j,

[IV 8Si i

ll7 7

- 50 4 I_L'"/ L

[0201

898 - _

[3 63]

8496

[9 83]

! ! :t I

650 6

[21 67] i

_ _ 649 6 _-

[9¸83)

REAR VIEW

Fig.6 - 50CR024-036 Unit Dimensions

AO5299

355 8

i 114 01]

i RETURN

I0907

142 941

FIELD ENTRY_

SERVICE PORTS \

FULl¸lOUVER •

TOP VIEW

LEFT SIDE VIEW

I 1193t

[4700]

44 3

i[I 74i

F_LL LO_VE_

A •

UNIT

50CR042

50CR0_8

50CRO_O

ELECIRICAL

CHARACTER_S_ICS

208 230 ] 60, 808/230 3 60

208 230 _ 60, E08/230 3 60

I 208230160, 208/230 3 60

J__Jg£T WT UNII HEGHI CENER OF GRAVITY MMIiN

'2 I'k ,i,, ,.°,, ,,, ol,o,o,,ool., o.,,,

CORNER _E GiT LBS /1(6

A 8 ] C O

88/39 9i68/30 8 106/40 ii_77/80 2

_i1 611277 127157 _ 177/80 ]

REQUIRED CLEARANCES TO COMBUSTIBLE NATL

M/LL/M[iERS [IN)

TOP OF _NI/ 355 _ i_4 00!

DUCT SIO[ Or 8_iT ................ 5O 8 12 00}

SiDE OPPOSIT[ DUCTS........................ 355_ 1i4001

_01TOM OF _NiT ................................ 127 1050}

ELEC/RIC _EAT PANEL 9_ 4 136 00/

I_EC. REQ_RfD EI.EARANEEE.

MILLIMETERS IiNi

_EY_EEN 8N/iS. PO_ER EN/RY SiSE 1066 8 _42 00_

UNIT ANO UNGROUNDEDSURFACES< ?O_ER ENTRY S_E .... 014 0 130 00/

UNiT _0 BLOC_ OR CONCRETE _LLS AND OTHER

GRBUNDE_ $_RFACES POWfR ENTRY SiDE ............. /066 8 14_00}

REQUIREDCL_RANCE FUR OPI_RATItll AND S[!tVI_NG _ILtI_ETERS [iNI

EVAP COIL ACCESS S/bE ......................... 914¸0 13600i

POW[R ENTRY SIOE 914 0 _36 00/

(EXCEPT £OR NEC REOUIREMENTS)

UNiT TOP.................................... 914¸0 136001

SiDE OPPOSITE _UCTS ............. 914¸0 13600}

DUC/ PANEL 30_8 lie 00/1

_iNI_UM 01STANCES:IF UNIT IS PLACED LESS TH_N 304_ [1200] _RO_ _ALL

SYSTE_.IHEN SESTEM PERFORMANCEMAYBE COM?RO_ISED

070 2

i8442]

COMPRESSOR, _LOWER, ELECTRIC BEAT

& EIESTRICAL ACCESS PANE{

................................ 12263 ...................... _,4

1_8281

445 [I 75] OIA _o--a

PO_ER ENIRY \

OIMENSiONS iN [1AR£ iN {NCRES

• rgLi LOUVER

4070

I_EBU}

FRONTVIEW RIGHTSIDEVIEW

L_m__ _

31 I)_CT , 3"

_---87 E!_-347 5

[343] [13 68]

_35_2 _ _35/2

{13831 {13 837

REAR VIEW

Fig. 7 - 50CR042-060 Unit l)imensions

A05300

Step 4--Rig and Place Unit

Rigging and handling of this equipment can be hazardous for many

reasons clue to the installation location (roofs, elevated structures,

etc.).

Only trained, qualified crane operators and ground support staff

should handle and install this equipment.

When working with this equipment, observe precautions in the

literature, on tags, stickers, and labels attached to the equipment, and

any other safety precautions that might apply.

Training for operators of the lifting equipment should include, but

not be limited to. the following:

1. Application of the lifter to the load. and adjustment of the

lifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.

3. Condition of the load as it relates to operation of the lifting

kit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and work

gloves.

INSPECTION

Prior to initial use, and at monthly intervals, all rigging brackets and

straps should be visually inspected for any damage, evidence of

wear. structural deformation, or cracks. Particular attention should

be paid to excessive wear at hoist hooking points and load support

areas. Brackets or straps showing any kind of wear in these areas

must not be used and should be discarded.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect

switch. Turn off accessory heater power switch if applicable.

Tag disconnect switch with asuitable warning label.

UNIT FALLING HAZARD

Failure to follow this warning could result in personal injury

or death.

Never stand beneath rigged units or lift over people.

INTRODUCTION

The lifting/rigging bracket is engineered and designed to be

installed only on Small Packaged Products. This bracket is to be

used to rig/lift a Small Packaged Product onto roofs or other

elevated structures.

USE OF RIGGING BRACKET

Field Installation of Ri_in_ Bracket

1. If applicable, remove unit from shipping carton. Leave top

shipping skid on the unit for use as a spreader bar to prevent

the rigging straps from damaging the unit. If the skid is not

available, use a spreader bar of sufficient length to protect the

unit from damage.

2. Remove 4 screws in unit corner posts.

3. Attach each of the 4 nmtal rigging brackets under the panel

rain lip (See Fig. 8). Use the screws removed in step 2 above

to secure the brackets to the unit.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

Rigging bracket MUST be under the rain lip to provide

adequate lifting.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

Do not strip screws when re-securing the unit. If a screw is

stripped, replace the stripped one with a larger diameter screw

(included).

Ri_,_in_/Liftin_ of Unit

1. Bend top of brackets down approximately 30 degrees from

the corner posts.

2. Attach straps of equal length to the rigging brackets at

opposite ends of the unit. Be sure straps are rated to hold the

weight of the unit (See Fig. 9).

3. Attach a clevis of sufficient strength in the middle of the

straps. Adjust the clevis location to ensure unit is lifted level

with the ground.

4. After unit is securely in place detach rigging straps. Remove

corner posts, screws, and rigging brackets then reinstall

screws.

UNIT FALLING HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

When straps are taut, the clevis should be a minimum of 36

inches above the unit top cover.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

Rigging brackets for one unit use only, When removing a

unit at the end of its useful life, use a new set of brackets.

After the unit is placed on the roof curb or mounting pad. remove

the top crating. On 50CR060 units only, 2 wire ties fastened to the

outdoor coils and reversing valve/accumulator assembly must be

cut. Remove the left and front louvered panels and corner post to

access wire ties. The wire tie to be cut on the left is located

approximately 4 in. down the tube sheet. The wire tie to be cut on

the right is located approximately 6 in. down the tube sheet.

nDETAIL A

Fig. 8 - Rigging Bracket Under Unit Rain Lip

C03017

MINIMUM HEIGHT: 36

UNIT HEIGHT

SEE DETAIL

A06113

UNIT SIZE

500R024

500R030

500R036

500R042

500R048

50CR060

MAXIMUM SHIPPING WEIGHT

372

395

462

485

521

169

179

210

22O

236

Fig. 9-Suggested Rigging

Step5--SelectandInstallDuctwork

The design and installation of the duct system must be in accordance

with the standards of the NFPA for installation of non-residence

type air conditioning and ventilating systems, NFPA 90A or

residence type. NFPA 90B and/or local codes and ordinances.

Select and size ductwork, supply-air registers, and return air grilles

according to ASHRAE (American Society of Heating,

Refrigeration. and Air Conditioning Engineers) recommendations.

The unit has duct flanges on the supply- and return - air openings on

the side of the unit.

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury

or death.

For vertical supply and return units, tools or parts could drop

into ductwork, therefore, install a 90 degree turn in the return

ductwork between the unit and the conditioned space. If a 90

degree elbow cannot be installed, then a grille of sufficient

strength and density should be installed to prevent objects

from falling into the conditioned space. Units with electric

heaters require 90 degree elbow in supply duct.

When designing and installing ductwork, consider the following:

1. All units should have field-supplied filters or accessory filter

rack installed in the return-air side of the unit.

Recommended sizes for filters are shown in Table 1.

2. Avoid abrupt duct size increases and reductions. Abrupt

change in duct size adversely affects air performance.

IMPORTANT: Use flexible connectors between ductwork and

unit to prevent transmission of vibration. Use suitable gaskets to

ensure weather tight and airtight seal. When electric heat is installed,

use fireproof canvas (or similar heat resistant material) connector

between ductwork and unit discharge connection. If flexible duct is

used. insert a sheet metal sleeve inside duct. Heat resistant duct

connector (or sheet metal sleeve) must extend 24-in. from electric

heater element.

3. Size ductwork for max cooling air quantity (400 cfm/ton).

4. Seal, insulate, and weatherproof all external ductwork. Seal,

insulate and cover with a vapor barrier all ductwork passing

through conditioned spaces. Follow latest Sheet Metal and

Air Conditioning Contractors National Association

(SMACNA) and Air Conditioning Contractors Association

(ACCA) minimum installation standards for residential

heating and air conditioning systems.

5. Secure all ducts to building structure. Flash, weatherproof,

and vibration-isolate duct openings in wall or roof

according to good construction practices.

CONVERTING HORIZONTAL DISCHARGE UNITS

DOWNFLOW (VERTICAL) DISCHARGE UNITS

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect

switch.Turn off accessory heater power switch if applicable.

1. Open all electrical disconnects and install lockout tag before

starting any service work.

2. Remove side duct covers to access bottom return and supply

knockouts.

NOTE: These panels are held in place with tabs similar to an

electrical knockout.

3. Use a screwdriver and hammer to remove the panels in the

bottom of the composite unit base.

4. Ensure the side duct covers are in place to block off the

horizontal air openings (See Fig. 11).

Step 6--Provide for Condensate Disposal

NOTE: Ensure that condensate-water disposal methods comply

with local codes, restrictions, and practices.

The units dispose of condensate through a 3/4 in. NPT female fitting

that exits on the compressor end of the unit. Condensate water can

be drained directly onto the roof in rooftop installations (where

permitted) or onto a gravel apron in ground level installations.

Install a field-supplied condensate trap at end of condensate

connection to ensure proper drainage. Make sure that the outlet of

the trap is at least 1 in. lower than the drain-pan condensate

connection to prevent the pan from overflowing. Prime the trap with

water. When using a gravel apron, make sure it slopes away from the

unit.

If the installation requires draining the condensate water away from

the unit, install a field-supplied 2-in. trap at the condensate

connection to ensure proper drainage. Condensate trap is available

as an accessory or is field-supplied. Make sure that the outlet of the

trap is at least 1 in. lower than the unit drain-pan condensate

connection to prevent the pan from overflowing. Connect a drain

trough using a minimum of field-supplied 3/4 -in. PVC or

field-supplied 3/4 -in. copper pipe at outlet end of the 2 -in. trap

(See Fig. 12). Do not undersize the tube. Pitch the drain trough

downward at a slope of at least i in. for every 10 ft. of horizontal run.

Be sure to check the drain trough for leaks. Prime the trap at the

beginning of the cooling season start-up.

UNIT SIZE

NOMINAL CAPACITY (ton)

OPERATING WEIGHT (lb.)

Compressor

Refrigerant (R-410A) Quantity (lb.)

REFRIGERANT METERING DEVICE

ORIFICE OD (in.)

OUTDOOR COIL

Rows...Fins/in,

Face Area (sq. ft,)

OUTDOOR FAN

Nominal Cfm

Diameter

Motor HP (RPM)

INDOOR COIL

Rows...Fins/in,

Face Area (sq. ft,)

INDOOR BLOWER

Nominal Airflow (Cfm) Comfort

Efficiency

Max

Size (in,)

Motor HP (RPM)

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto)

Return-Air Filters (in.)*

Throwaway

_Required filter sizes shown are based on the larger of tile ARI

Table 1--Physical Data -Unit 50CR

024 030 036 042 048 060

2 2-1/2 3 3-1/2 4 5

350 350 373 440 463 499

Scroll

7.5 8 9.5 t0.8 11.5 14.0

TXV

0.035 (2) 0.038 (2) 0.038 (2)0.035 (2)

2...21

12.3

27O0

I/8 (825)

3...15

3.7

2...21

12.3

27OO

1/8 (825)

3...15

3.7

2...21

13.6

280O

I/8 (825)

4...15

3.7

2...21

15.4

28O0

I/8 (825)

3...15

4.7

0.088 (Left OD Coil)

0.046 (Right OD Coit)

2...21

17.2

3300

I/4 (1100)

4...15

4.7

0,042 (Left OD Coil)

0.052 (Right OD Coil)

2...21

19.4

3300

I/4 (1100)

4...17

5.7

Variable based on Comfort Roll back (see User Interface instructions for more information).

700 875 1050 1225 1400 1750

800 1000 1200 1400 1600 2000

10xt0 10x10 tlx10 1tx10 1tx10 1tx10

1/2 t/2 3/4 3/4 3/4 1

650 -+ 15

420 -+25

20-+ 5

45-+ 10

20x24x1 20x24x1 24x30x1 24x36x1 24x36x1 24x36x1

Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ftiminute

for throwaway type or 450 ft/'mimee for high capacity type. Air filter pressure drop for non standard filters must not exceed 0.og in. wg.

USER

INTERFACE

TOP COVER

_FROM

GASLINE

DISCONNECT

PER NEC*

*NEC - NATIONAL ELECTRICAL CODE

Fig. 10 - Typical Installation

A06091

Ducl Covers

Fig. 11 - 50CR with Duct Covers On

A05301

1" (25mm) MIN,

cg9013

Fig, 12 -Condensate Trap

Step 7--Instan Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

The unit cabinet must have an uninterrupted, unbroken

electrical ground to minimize the possibility of personal injury

if an electrical fault should occur. This ground may consist of

an electrical wire connected to the unit ground screw in the

control compartment, or conduit approved for electrical

ground when installed in accordance with NEC, ANSI/NFPA

American National Standards Institute/National Fire

Protection Association (latest edition) (in Canada, Canadian

Electrical Code CSA C22.1) and local electrical codes.

HIGH-VOLTAGE CONNECTIONS

The unit must have a separate electrical service with a

field-supplied, waterproof disconnect switch mounted at, or within

sight from the unit. Refer to the unit rating plate, NEC and local

codes for maximum fuse/circuit breaker size and minimum circuit

amps (ampacity) for wire sizing (See Table 2 for electrical data).

The field-supplied disconnect may be mounted on the unit over the

high-voltage inlet hole (See Fig. 6 and 7).

If the unit has an electric heater, a second disconnect may be

required. Consult the Installation, Start-Up, and Service

Instructions provided with the accessory for electrical service

connections.

Operation of unit on improper line voltage constitutes abuse and

may cause unit damage that could affect warranty.

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the unit

being installed.

i. Make all electrical connections in accordance with NEC

ANSI/NFPA (latest edition) and local electrical codes

governing such wiring. In Canada. all electrical

connections must be in accordance with CSA standard

('22. i Canadian Electrical Code Part i and applicable local

codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between

field-supplied electrical disconnect switch and unit. DO

NOT USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within operating

voltage range indicated on unit rating plate. On 3-phase

units, ensure phases are balanced within 2 percent. Consult

local power company for correction of improper voltage

and/or phase imbalance.

4. Insulate low-voltage ``vires for highest voltage contained

within conduit when lo``v-voltage control ``vires are in same

conduit as high-voltage ``vires.

5. Do not damage internal components when drilling through

any panel to mount electrical hard``vare, conduit, etc.

ROUTING POWER LEADS INTO UNIT

Use only copper wire between disconnect and unit. The high

voltage leads should be in a conduit until they enter the duct panel;

conduit termination at the duct panel must be watertight. Run the

high-voltage leads through the power entry knockout on the power

entry side panel. See Fig. 6 and 7 for location and size. For

single-phase units, connect leads to the black and yellow ,,vires ; for

3 -phase units, connect the leads to the black, yellow, and blue wires.

CONNECTING GROUND LEAD TO GROUND SCREW

Connect the ground lead to the chassis using the ground screw in the

wiring splice box (See Fig. 14 and 17).

ROUTING CONTROL POWER WIRES

For detailed instruction on the low voltage connections to the User

Interface (UI), refer to the UI installation guide.

Form a drip-loop with the control leads before routing them into the

unit. Route the low voltage control leads through grommeted,

low-voltage hole provided into unit (See Fig. 6 and 7). Connect user

interface leads to unit control power leads as shown in Fig. 14.

The unit transformer supplies 24-v power for complete system

including accessory electrical heater. A fuse is provided in the 24-v

circuit on the control board (See Fig. 19); see the caution label on

the transformer. Transformer is factory wired for 230-v operation.

If supply voltage is 208-v, rewire transformer primary as described

in Special Procedures for 208-v Operation section.

UNIT SIZE

024

030

036

042

048

060

V-PH-HZ

208/230-1-60

208/230-1-80

208/230-1-60

208/230-3-80

208/230-1-60

208/230-3-60

208/230-1-60

208/230-3-60

208/230-1-60

208/230-3-80

Table 2--Electrlcal Data--50CR

VO LTAG EELECTRIC HEAT SINGLE POINT POWER

RANGE

MIN MAX

t87 253

187 253

t87 253

187 253

COMPRESSOR OFM IFM

FLA FLA NOMINAL

RLA LRA kW*

-/-

3.8/5

13.5 61 .O 0.9 4.3 5,4/7,2

7.5/10,O

-/-

3,8/5

15.9 73.0 0.9 4.3 5.4/7.2

7.5/10.0

-/-

3.8/5

18.9 83.0 0.9 8.8 5.4/7.2

7.5/10.0

11.3/15.0

-/-

3,8/5,0

12.2 77.0 1.8 6.8 7,5/1 O,O

11.3/15.0

-/-

3.8/5.o

5.4/7.2

22.4 t05.0 0.9 6.8 7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.o

15.4 88.0 0.9 8.8 7,2/10.0

tl.3/15,0

15.0/20.0

-/-

3,8/5,0

5.4/7.2

21.3 109.0 1.6 8.8 7,5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

14.7 91.0 1.6 8.8 7,5/10.0

tl.3/15.0

15.0/20.0

-/-

3,8/5,0

5.4/7.2

26,9 145.0 1.5 9.t 7,5/10.0

tl.3/15.0

15.0/20.0

-/-

3,8/5,0

17.6 123.0 1.5 9.1 7,5/10.0

11.3/15.0

t 5, 0/20.0

FLA

-/-

18.1/20.8

26.0/30.0

36.1/41.7

-/-

18.1/20.8

28.0/30.0

38.1/41.7

-/-

18.1/20,8

28.0/30.0

36.1/41.7

54.2/62.5

-/-

10.4/12,0

20.8/24.1

31.3/36.1

-/-

18.1/20,8

28.0/30.0

36.1/4t .7

54.2J82.5

72.2/83.3

-/-

10.4/12,0

20.8/24.1

31.3/36.1

41.6/48.0

-/-

18.1/20.8

28.0/30.0

36.1/41.7

54.2J82.5

72.2/83.3

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.8/48.0

-/-

18.1/20.8

28.0/30.0

38.1/41.7

54.2J82.5

72.2/83.3

-/-

10.4/12,0

20.8/24.1

31.3/38.1

41.6/48.0

SUPPLY

MCA MOCP

22,1/22.1 30/30

44.8/48.1 50/50

54.8/59.6 60/60

67,2/74.2 70/80

25.1/25.1 30/30

47.8/51.1 50/60

57,6/82.6 60/70

70.2/77.2 80/80

29.5/29.5 35/35

52,1/55.6 60/60

82,0/87.0 70/70

74.7/81.6 80/90

97.2/107.7 100/110

23.7/23.7 30/30

38.7/38.7 45/45

49,7/53.7 50/60

82.7/88.8 70/70

35.7/35.7 45/45

58,3/81.7 70/70

88.2/73.2 80/80

80.8/87.8 90/90

108,4/118.8 110/125

128.0/139.9 150/150

27.0/27.0 35/35

40,0/42.0 50/50

53.0/57.0 80/60

66.0/72.1 70/80

78,9/86.9 80/90

35.0/35.0 45/45

57.6/61.1 70/70

87.5/72.5 80/80

80.2/87.1 90/90

102.7/118.2 110/125

125.3/139.2 150/150

28.8/26.8 35/35

89.8/41.8 50/50

52.8/56.8 80/60

65.9/71.9 70/80

78.7/86.7 80/90

44.2/44.2 80/60

68.8/70.3 80/90

78.7/81.7 90/1 O0

89.4/96.3 100/110

ttl.9/122.4 t25/125

184.5/148.4 150/150

34.8/34.6 40/40

47.6/49.6 60/60

60.7/84.7 70/70

73.7/79.7 80/80

86.6/94.6 90/1 O0

LEGEND ,, @US

FLA -- Full Load Amps

LRA -- Locked Rotor Amps Lw

MCA -- MinimumCircuitAmps

MOCP -- Maximum Overcurrent Protection

RLA -- Rated Load Amps

NOTES:

1. In compliance with NEC (National Electrical Code) requirements

for multimotor and combination load equipment (refer to NEC

Articles 430 and 440, the overcurrent protective device for the

unt sha be Power Supply fuse. The CGA (Canadian Gas

Association) units may be fuse or circuit breakeE

2. Minimum wire size is based on 60 C copper wire. Ifother than

60 Cwire is used, or if length exceeds wire length in table,

determine size from NEC.

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%. Use the following formula to determine

the percentage of voltage imbalance

% Voltage imbalance

= 100 x max voltage deviation from average voltage

average voltage

. Heater capacity (kW) based on heater voltage of 208v & 240v.

If power distibution voltage to unit varies from rated heater

voltage, heater kW will vary accordingly.

EXAMPLE: Supply voltage is 230-3-60.

A B C AB = 228 v

BC = 231 v

AC = 227 v

Average Voltage = 228 + 231 + 227

= 68._6

=229

Determine maximum deviation from average voltage.

(AB) 229- 228 = 1 v

(BC) 231 - 229 = 2 v

(AC) 229- 227 = 2 v

Maximum deviation is 2 v.

Determine percent of voltage imbalance

% Voltage Imbalance = 100 x --

229

= 0.8%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

immediately.

C03014

Fig. 13 - Electrical Data Legend

User Interface

Humidifier

(Optional)

Infinity Control Board

Outdoor Air Therrnisto[

(if used)

LEGEND

Field Control-Voltage Wiring

Fig. 14 - Control Voltage Wiring Connections

A05302

UN!T COMPO_£N_ ARRANGEMENT

IZ3

............LEGEND

k_S PR[SS_£ES_]gC_

_VS _lXrSl_ WlVU

,o_s

2 SEE_RIC_P_GESro_ USE_I_TE_E _ S_BSAS[S

r_ SEO_CE C_D _TUZ_

G G

_E_!ZED _E EN_RGJZ_

D } > SW!TCH SETTINGS

co.,r_ss_, orr m_,

_,r,os, _, ,e,,,_,e ,o,,_, ,, _r ,s cosr_

!50CR500007 ] 7.0

Fig. 15 -Wiring SchematicsISOCR Single Phase

A05304

COSTROL BOARD

BkN --

)viDooii_41_COmPONEnT ARRANGEMENT

_, ............LEGEND

_o_P _O_ESSO__o_o_

--* FIEL_ pO_R _RING _P l_IO0 /AN _00

G G 1

E_ERGIZ_D _E E_ER_IZ_O CLOSES O_E_

_AT

150CR500005]5.0

Fig. 16 -Wiring Schematics-50CR Three Phase

A05259

GROUNDSCREW

(INSPLICEBOX)

SINGLE-PHASE

CONNECTIONS

TO DISCONNECT

PER NEC

GROUND

LEAD

L1 ......

3-PHASE L3

CONNECTIONS

LEGEND

NEC - National Electrical Code

- - - Field Wiring

_,_ Splice Connections

-- _BLK--

- - _YEL--

- -- _BLU--

NOTE: Use copper wire only.

Fig. 17 - Line Power Connections

C99057

Fig. 18 - Control Plate

AO530S

The low-voltage circuit is fused by a board-mounted automotive

fuse placed in series with transformer SEC1 and R circuit. The C

circuit of transformer circuit is referenced to chassis ground through

a printed circuit run at SEC2 and metal control board mounting

eyelets. Check to be sure control board is mounted securely using

both factory-installed screws.

ACCESSORY INSTALLATION

A. Accessory Electric Heaters

Electric heaters may be installed in 50CR per instructions supplied

with electric heater package. See unit rating plate for

factory-approved electric heater kits.

NOTE: Units installed without electric heat should have a

factory-supplied sheet metal block-off plate installed over heater

opening. This reduces air leakage and formation of exterior

condensation.

B. Outdoor Air Thermistor (OAT)

A 2-screw terminal strip is provided for connection of an outdoor

temperature thermistor. This strip is marked OAT.

NOTE: While the installation of an outdoor temperature sensor

using the Infinity control board OAT terminals is optional, certain

Infinity features (ComfortHeat, electric heat lockout, auto humidity

control) will be lost.

OAT input is used to supply outdoor temperature data for system

level functions and for temperature display on User Interface.

Using two ,,vires of field-supplied thermostat wire cable, wire one

lead of thermistor to one screw terminal and the other lead to

remaining screw terminal: there is no polarity to be observed. It is

strongly recommended that two ,,vires be used to connect the

thermistor to eliminate noise interference in temperature reading. If

there are not two spare ,,vires available in cable, one wire may be

used to connect thermistor to OAT screw terminal 1 and the other

lead of the thermistor can be wired to 24-vac COM (C) wire. OAT

screw terminal 1 is terminal located closest to the ABCD system

communications and is marked with a small number 1 next to the

terminal strip.

NOTE: Mis-wiring OAT inputs will not cause damage to either

Infinity control or thermistor. If the thermistor is wired incorrectly,

no reading will appear at User Interface. Re-wire thermistor

correctly for normal operation.

C. Humidifier Connections

The Infinity control board terminal marked HUM is provided for

low voltage (24-vac) control of a humidifier. No humidistat is

required as User Interface monitors indoor humidity. When

commanded to operate humidifier, the unit control will energize the

HUM output to turn humidifier on and de-energize HUM output to

turn humidifier off. Wire HUM and C terminals directly to

humidifier as shown in Fig. 14.

SPECIAL PROCEDURES FOR 208-V OPERATION

Be sure unit disconnect switch is open.

Disconnect the yellow primary lead from the transformer. See unit

wiring label. (See Fig. 15, 16 and 18)

Connect the yellow primary lead to the transformer terminal labeled

200-v.

SEO-2

}

SEO-1 o

Fig. 19 - Detail of Printed Circuit Board

PRE- START- UP

A03169

FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death and/or property damage.

1. Follow recognized safety practices and wear protective

goggles when checking or servicing refrigerant system.

2. Do not operate compressor or provide any electric power

to unit unless compressor ternainal cover is in place and

secured.

3. Do not remove compressor terminal cover until all

electrical sources are disconnected and tagged.

4. Relieve and recover all refrigerant from system before

touching or disturbing anything inside terminal box if

refrigerant leak is suspected around compressor terminals.

5. Never attempt to repair soldered connection while

refrigerant system is under pressure.

6. Do not use torch to remove any component. System

contains oil and refrigerant under pressure.

7. To remove a component, wear protective goggles and

proceed as follows:

a. Shut off electrical power to unit and install lockout

tag.

b. Relieve and reclaim all refrigerant from system

using both high- and low-pressure ports.

c. Cut component connecting tubing with tubing

cutter and remove component from unit.

d. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to torch

flame.

Use the Start-Up Checklist supplied at the end of this book and

proceed as follows to inspect and prepare the unit for initial start- up:

1. Remove all access panels.

2. Read and follow instructions on all DANGER, WARNING,

CAUTION. and INFORMATION labels attached to, or

shipped with unit.

3. Make the following inspections:

a. Inspect for shipping and handling damages, such as

broken lines, loose parts, disconnected wires, etc.

b. Inspect for oil at all refrigerant tubing connections and on

unit base. Detecting oil generally indicates a refrigerant

leak. Leak test all refrigerant tubing connections using

electronic leak detector, or liquid-soap solution. If a

refrigerant leak is detected, see following Check for

Refrigerant Leaks section.

c. Inspect all field- and factory-wiring connections. Be

sure that connections are completed and tight.

d. Ensure wires do not touch refrigerant tubing or sharp

sheet metal edges.

e. Inspect coil fins. If damaged during shipping and

handling, carefully straighten fins with a fin comb.

4. Verify the following conditions:

a. Make sure that outdoor fan blade is correctly positioned

in fan orifice (See Fig. 24).

b. Make sure that condensate drain pan and trap are filled

with water to ensure proper drainage.

c. Make sure that all tools and miscellaneous loose parts

have been removed.

5. Compressors are internally spring mounted. Do not loosen

or remove compressor holddown bolts.

6. Each unit system has two Schrader-type ports, one low-side

Schrader fitting located on the suction line, and one

high-side Schrader fitting located on the compressor

discharge line. Be sure that caps on the ports are tight.

START-UP

Step 1--Unit Start-Up

NOTE: Always check high- and low-voltage supply to the unit

components. Check the integrity of the plug receptacle connections

and unit wiring harness prior to assuming a component failure.

A. LED Description:

LEDs built into Infinity " control board provide installer or service

person information concerning operation and/or fault condition of

the unit control and ECM motor. This information is also available

at the system user interface in text with basic troubleshooting

instructions. Careful use of information displayed will reduce the

need for extensive manual troubleshooting.

The amber LED located at bottom center of control adjacent to

motor harness plug is Motor Status LED and it is labeled MOTOR.

A second amber LED located in upper right center of control

adjacent to System Communications connector (A,B,C,D) is the

System Status LED and it is labeled STATUS. The green LED

labeled COMM is also located adjacent to System Communications

connector, below STATUS LED, and is used as an indicator of

system communications status. Status Codes will be displayed on

the STATUS LED using the following protocol:

1. The number of short flashes indicates first digit of code.

2. The number of long flashes indicates second digit of code.

3. A short flash is 0.25 seconds on. A long flash is i second on.

4. The time between flashes is 0.25 seconds.

5. The time between last short flash and first long flash is 1

second.

6. The LED will be off for 2.5 seconds before repeating code.

B. Control Start-Up and System Communications

Troubleshooting:

On power up, green COMM LED will be turned off until successful

system communications are established (this should happen within

10 seconds). Once conmmnications with User Interface are

successful, COMM LED will be lit and held on. At the same time,

amber STATUS LED will be lit and held continuously on until a

request for operating mode is received. The STATUS LED will be

on any time unit is in idle mode.

If. at any time, communications are not successful for a period

exceeding 2 minutes, the Infinity control will only allow emergency

heating or cooling operation using a common thermostat and the R,

C, Y. O, W terminal strip connections and will display Status (;ode

16, System Communication Fault, on amber STATUS LED. No

further troubleshooting information will be available at User

Interface until communications are re-established.

If COMM LED does not light within proper time period and status

code is not displayed;

1. Check system transformer high- and low-voltage to be sure

the system is powered.

2. Checkfuseoncontrolboardtobe sureitisnotblown. Iffuse

is open, check system wiring before replacing it to be sure a

short does not cause a failure of replacement fuse.

If COMM LED does not light within proper time period and status

code is displayed,

1. Check system wiring to be sure User Interface is powered

and connections are made A to A, B to B, etc. and wiring is

not shorted. Mis-wiring or shorting of the ABCD

communications wiring will not allow successful

communications.

NOTE: Shorting or mis-wiring low-voltage system wiring will not

cause damage to unit control or user interface but may cause low

voltage fuse to open.

C. ECM Motor Troubleshooting

The ECM motor used in this product consists of two parts: the

control module and the motor winding section. Do not assunre

motor or module is defective if it will not start. Use the designed-in

LED information aids and follow troubleshooting steps described

below before replacing motor control module or entire motor.

Motor control module is available as a replacement part.

VERIFY MOTOR WINDING SECTION

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

After disconnecting power from the ECM motor, wait at least

5 minutes before removing the control section. Internal

capacitors require time to discharge.

Before proceeding to replace a motor control module:

1. Check motor winding section to be sure it is functional.

2. Remove motor control module section and unplug winding

plug. Motor shaft should turn freely, resistance between any

two motor leads should be similar and resistance between

any motor lead and unpainted motor end should exceed

100,000 ohms.

3. Failing any of these tests, entire ECM motor must be

replaced.

4. Passing all of the tests, motor control module alone can be

replaced.

MOTOR TURNS SLOWLY

1. Low static pressure loading of blower while access panel is

removed will cause blower to run slowly. Particularly at low

airflow requests. This is normal, do not assume a fault exists.

2. Recheck airflow and system static pressure using User

Interface service screens with access panel in place.

NOTE: Blower motor faults will not cause a lockout of blower

operation. The unit control will attempt to run the blower motor as

long as User Interface maintains a demand for airflow. The unit

control will not operate electric heaters while a fault condition

exists. The unit control communicates with the motor at least once

every five seconds, even when the motor is idle. If, during operation.

the unit control does not communicate with the motor for more than

25 seconds, the motor will shut itself down and wait for

communications to be reestablished.

D. Using Motor LED in Troubleshooting

The MOTOR LED is connected to the blower motor

comnmnication line and works with the unit control microprocessor

and the STATUS LED to provide unit operation and

troubleshooting infornration. When the motor is commanded to

operate, the MOTOR LED will be turned on and will flash each time

instructions are sent to the motor. When the motor is commanded to

stop, the MOTOR LED will be turned off.

If the MOTOR LED is lit, flashing, and the motor is running, or if

the MOTOR LED is off and the motor is stopped, operation is

normal and no motor fault exists.

If the MOTOR LED is lit, flashing, and the motor does not run, or

if the MOTOR LED is off and the motor is running, check the

STATUS LED for the Status (;ode. Refer to the troubleshooting

instructions for the indicated Status Code in Section E, Unit

Troubleshooting.

E. Unit Troubleshooting

Unit faults indicated by flashing codes on the amber system

STATUS LED can be resolved using troubleshooting information

provided below. Codes are listed in order of their priority, highest

to lowest. Though multiple faults can exist at any time, only the

highest priority code will be displayed on STATUS LED. Clearing

the indicated fault when multiple faults exist will cause the next

highest priority Status (;ode to be flashed. All existing faults, as well

as a fault history, can be viewed at User Interface.

STATUS CODE 45, CONTROL BOARD TEST FAULT

Unit control has failed internal start-up tests and must be replaced.

No other service procedure will correct.

STATUS CODE 37, HEATER OUTPUT SENSED "ON" WHEN

NOT ENERGIZED:

Unit control is provided with circuitry to detect presence of a 24-vac

signal on electric heater stage 1 and stage 2 outputs.

If unit control detects a 24-vac signal on either heater stage output

and it is not supplying signal, Status (;ode 37 will be displayed on

STATUS LED. Unit control will turn off output and command

blower motor to supply an airflow determined to be safe for current

operation mode with electric heaters energized.

To find the fault:

1. Stop all system operations at User Interface and check heater

stage 24-vac outputs.

2. Disconnect electric heater at power and check heater wiring

for faults. See Status (;ode 36 for more information.

STATUS CODE 44. MOTOR COMMUNICATION FAULT

The MOTOR LED is connected to the blower motor

communication line and works with the unit control microprocessor

and STATUS LED to provide unit operation and troubleshooting

information.

When motor is commanded to operate, the MOTOR LED will be

turned on and will flash each time instructions are sent to the motor.

Whenthemotoriscommandedtostop,theMOTORLED,,villbe

turnedoff.TheMOTORLEDwill notflashto indicate

communicationswhenitisturnedoff.

Unitcontrolisconstantlycommunicatingwiththemotor,even

whenthemotorandMOTORLEDareoff.If motordoesnot

acknowledgereceiptofcommunications,thecontrolwilldisplay

Status(;ode44onSTATUSLEDandcontinueto try to

communicatewith the motor.If motoracknowledges

communication,statuscodewillbecleared.

IfMOTORLEDislitandflashingandmotordoesnotrun:

1.ChecktheSTATUSLED.IfSTATUSLEDisindicatinga

Status44code,checkthemotorwiringharnessforproper

connectiontocontrolandmotorreceptacles.

2.Checkmotorwiringharnesstobesureallwiringcomplies

withwiringdiagramdescription,makesacompletecircuit

fromconnectortoconnector,andisnotshorted.

3.Check12-vdclowvoltagesupplytomotoratpins1(+)and

2(-)ofmotorheaderconnectiontounitcontrol.

Ifallchecksarenormal,unitcontrolisgoodandcontrolmoduleon

motormayneedreplacement.CheckmotorandMotorControl

Modulefollowingtheinstructionsin SectionC,ECMMotor

Troubleshooting.

Shortedormis-wiringofthelowvoltagemotorharnesswiringwill

notcausedamagetounitcontrolortomotorcontrolmodule.

If theMOTORLEDisoff.STATUSLEDisindicatingaStatus

(;ode44andmotorisrunning:

1.Disconnectthemotorharnessattheunitcontrol.Ifmotor

continuestorun.unitcontrolisgoodandcontrolmoduleon

motormayneedreplacement.

STATUSCODE25,INVALIDMOTOR/MODEL SELECTION

On initial start-up, unit control shall poll motor for its size data and

check unit size data stored in unit control memory.

1. If motor size is incorrect for unit size or size data is invalid,

Status Code 25 will be displayed on STATUS LED.

2. If model size data is missing (as is the case when a

replacement control board is installed), system User

Interface will prompt installer to enter correct model size

from a list of valid sizes.

3. If motor size is incorrect for model size, motor must be

replaced with proper size motor. Unit control will not

respond to operation requests until this fault condition is

resolved.

STATUS (;ODE 26. INVALID HEATER SIZE

On initial power-up, unit control will write into memory electric

heater size as read from heater if heater is provided with Identifier

Resistor (IDR). Heater size must be valid for combination of indoor

and outdoor components installed. Unit control will read IDR value

connected to pins 1 and 2 of heater harness connector. If no resistor

is found, system User Interface will prompt installer to verify that no

heater is installed. Verifying that this is correct will establish that the

unit is operating without an electric heater accessory. Upon

choosing negative option, installer will be prompted to select heater

size installed from a list of valid heater sizes for unit size installed.

If heater ID resistor value read is invalid, Status Code 26 will be

displayed on STATUS LED.

If heater installed is equipped with a resistor connected to pins i and

2 of heater harness connector and status code 26 is displayed on

STATUS LED:

1. Check wiring harness connections to be sure connections are

secure.

2. If symptoms persist, disconnect wiring harness at unit

control board and check for a resistance value greater than

5000 ohms.

3. Check for proper wiring of resistor assembly.

4. Make sure heater size installed is an approved size for unit

and size installed.

NOTE: Unit control will not operate electric heater until this Status

Code is resolved. If the heater size is set through the User Interface.

the heater will be operated as a single stage heater. If staging is

desired, the IDR value must be read in by the unit control.

STATUS CODE 36. HEATER OUTPUT NOT SENSED WHEN

ENERGIZED

Unit control is provided with circuitry to detect presence of a 24-vac

signal on electric heater stage 1 and stage 2 outputs.

If unit control energizes either heater stage and does not detect the

24-vac signal on output, Status Code 36 will be displayed on the

STATUS LED, unit control will continue to energize heater

output(s) and adjust blower operation to a safe airflow level for

energized electric heat stage(s).

To find the fault:

1. Check for 24-vac on heater stage outputs. Unit control or

sensing circuit may be bad.

NOTE: It may be useful as an electric heater troubleshooting

procedure to disconnect the system communications to force Status

Code 16 enabling of emergency heat mode. It is difficult to know

which heater output is energized or not energized in normal

operation. When unit is operated in emergency heat mode using

electric heaters, both outputs are energized and de-engergized

together. Terminal strip inputs to control can then be connected R to

W to turn on both electric heat outputs. Heater output sensing

circuits can then be checked to resolve Status Code 36 or 37

problems.

STATUS CODE 41, BLOWER MOTOR FAULT

If MOTOR LED is lit and flashing and motor does not run:

1. Check STATUS LED. If STATUS LED is indicating Status

Code 41, motor control has detected that the motor will not

come up to speed within 30 seconds of being commanded to

run or that the motor has been slowed to below 250 rpm for

more than 10 seconds after coming up to speed. Motor

wiring harness and unit control are operating properly, do

not replace.

2. Check to be sure that the blower wheel is not rubbing the

housing.

3. Check motor to be sure that the motor shaft is not seized

(motor control module must be renroved and electronics

disconnected from windings to perform this check

properly).

4. Check motor windings section following instructions in

Section C, ECM Motor Troubleshooting.

If all these checks are normal, the motor control module may need

replacement.

STATUS CODE 16. SYSTEM COMMUNICATION FAULT

If, at any time, system communications are not successful for a

period exceeding 2 minutes, the unit control will only allow

emergency heating or cooling operation using a common

thermostat, and the R, C, Y. O, W terminal strip connections and,,vill

display Status code 16 on the amber STATUS LED (see section E,

Emergency Heating and Cooling Modes). No further unit

troubleshooting information will be available at the User Interface

until communications are re-established.

ChecksystemwiringtobesuretheUserInterfaceispoweredand

connectionsaremadeAtoA,BtoB.etc.,andwiringisnotshorted.

Mis-wiringorshortingoftheABCDcommunicationswiringwill

notallowsuccessfulcommunications.Correctingwiringfaultswill

clearthecodeandre-establishcommunications.

Shortingormis-wiringthelowvoltagesystemwiringwillnotcause

damagetounitcontrolortoUserInterfacebutmaycausethelow

voltagefusetoopen.

STATUS(;ODE46,BROWNOUTCONDITION

Ifthesecondaryvoltageofthetransformerfallsbelow15-vacfor

aperiodexceeding4seconds,StatusCode46willbedisplayedon

STATUSLEDandtheUserInterfacewillcommandthecontrol

boardtoturnoffYoutputcontrollingcompressor.

Whensecondaryvoltagerisesabove17-vacformorethan4

seconds,thebrownoutconditionisclearedandnormalsystem

operationwill resumesubjectto anyminimumcompressor

off-delayfunctionwhichmaybeineffect.Brownoutdoesnotaffect

blowerorelectricheateroperation.

STATUSCODE53,OUTDOORAIRTEMPERATURESENSOR

FAULT

IfanOATsensorisfoundatpower-up,inputisconstantlychecked

tobewithinavalidtemperaturerange.Ifsensorisfoundtobeopen

orshortedatanytimeafterinitialvalidation,Status(;ode53willbe

displayedatamberSTATUSLED.

CheckforfaultsinwiringconnectingsensortoOATterminals.

UsinganOhmmeter,checkresistanceofthermistorforashortor

opencondition.

Ifthermistorisshortedoropen,replaceit toreturnthesystemto

normaloperation.Iffaultisinthewiringconnections,correctingthe

faultwillclearthecodeandreturnthesystemtonormaloperation.

NOTE:Iffaultconditionisanopenthermistororawiringproblem

thatappearstobeanopenthermistorandthepowertotheunitis

cycledoff.thefaultcodewillbeclearedonthenextpower-upbut

thefaultwillremainandsystemoperationwillnotbeasexpected.

Thisisbecauseon power-up, the unit control cannot discern the

difference between an open sensor or ifa sensor is not installed.

Step 2--Sequence of Operation

The packaged heat pump is designed for installation with a

communicating User Interface. This unit will not respond to

commands provided by a common thermostat except under certain

emergency situations described in Step 1--Start-Up.

The User Interface uses temperature, humidity and other data

supplied from indoor and outdoor system components to control

heating or cooling system for optimum comfort. The unit will be

commanded by User Interface to supply airflow. The unit will

operate the indoor blower at requested airflow for most modes.

The nominal requested airflow will be 350 cfm per ton of nominal

cooling capacity as defined by unit size. Actual airflow request will

be adjusted from nominal using indoor and outdoor temperature

and indoor humidity data to optimize the system operation for

occupant comfort and system efficiency. Refer to User Interface

literature for further system control details.

Airflow during electric heater operation must be greater than a

minimum level for safe operation. If User Interface instructs unit to

turn on electric heat and the requested airflow is less than the

minimum level the unit control will override requested value.

NOTE: Once the compressor has started and then has stopped, it

should not be started again until 4 minutes have elapsed. The

cooling cycle remains "on" until the room temperature drops to

point that is slightly below the cooling control setting of the user

interface. Additionally, there is a 5-minute compressor delay built

into the control for heat pump heating mode.

Step 3--Check for Refrigerant Leaks

Locate and repair refrigerant leaks and charge the unit as follows:

1. Use both high- and low-pressure ports to relieve system

pressure and reclaim remaining refrigerant.

2. Repair leak following accepted practices.

NOTE: Install a bi-flow filter drier whenever the system has been

opened for repair.

3. Check system for leaks using an approved method.

4. Evacuate refrigerant system and reclaim refrigerant if no

additional leaks are found.

5. Charge unit with Puron (R-410A) refrigerant, using a

volumetric-charging cylinder or accurate scale. Refer to unit

rating plate for required charge.

Step 4_Start-Up Adjustments

Complete the required procedures given in the Pre-Start-Up

section before starting the unit. Do not jumper any safety devices

when operating the unit. Do not operate the unit in cooling mode

when the outdoor temperature is below 40°F (unless accessory.

low-ambient kit is installed). Do not rapid cycle the compressor.

Allow 5 min. between "on" cycles to prevent compressor damage.

CHECKING COOLING AND HEATING CONTROL

OPERATION

Start and check the unit for proper control operation as follows:

1. Place room UI SYSTEM switch or MODE control in OFF

position. Observe that blower motor starts when FAN mode

is placed in FAN ON position and shuts down within 60 sec

(030-060 size) or 30 sec (024 size) when FAN MODE

switch is placed in AUTO position.

2. Place system switch or MODE control in HEAT position. Set

control above room temperature. Observe that compressor.

outdoor fan, and indoor blower motors start. Observe that

heating cycle shuts down when control setting is satisfied.

3. When using an automatic changeover room thermostat.

place both SYSTEM or MODE control and FAN mode

switches in AUTO positions. Observe that unit operates in

cooling mode when temperature control is set to "call for

cooling" (below room temperature), and unit operates in

heating mode when temperature control is set to "call for

heating" (above room temperature).

IMPORTANT: Three-phase, scroll compressors are direction

oriented. Unit must be checked to ensure proper compressor

3-phase power lead orientation. If not corrected within 5 minutes.

the internal protector will shut off the compressor. The 3-phase

power leads to the unit must be reversed to correct rotation. When

turning backwards, the difference between compressor suction and

discharge pressures may be dramatically lower than normal.

BPS

OUTDOOR COIL

LEGEND

HPS - High Pressure Switch

LCS - Loss of Charge Switch

Accurate#Metering Device

] Arrow indicates direction of flow

Bypass

Position

TXV in Meterin(

Position

LCS

INDOOR COIL

Fig. 20 -Typical Heat Pump Operation, Cooling Mode

C03011

HPS

LEGEND

HPS - High Pressure Switch

LCS - Loss of Charge Switch

AccuratePMete_ing Device

] Arrow indicates direction of flow

OUTDOOR COIL

_,-- .4

Metering

Position

TXV in Bypass

Position

LCS

Fig. 21 - Typical Heat Pump Operation, Heating Mode

INDOOR COIL

C03012

CHECKING AND ADJUSTING REFRIGERANT CHARGE

The refrigerant system is fully charged with Puron (R-410A)

refrigerant and is tested and factory sealed.

NOTE: Adjustment of the refrigerant charge is not required unless

the unit is suspected of not having the proper R-410A charge. The

charging label and the tables shown refer to system temperatures and

pressures in cooling mode only. A refrigerant charging label is

attached to the outside of the service access door. If charge level is

suspect in heating mode, reclaim all refrigerant and charge to

informative plate amount. (This information may be obtained from

the physical data table also.) The charging label and the tables

shown refer to system temperatures and pressures in cooling mode

only. A refrigerant charging label is attached to the outside of the

service access door.

IMPORTANT: When evaluating the refrigerant charge, an

indicated adjustment to the specified factory charge must always be

very minimal. If a substantial adjustment is indicated, an abnormal

condition exists somewhere in the cooling system, such as

insufficient airflow across either coil or both coils.

REFRIGERANT CHARGE

The amount of refrigerant charge is listed on the unit rating plate

and/or the physical data table. Refer to the Refrigeration Service

Techniques Manual. Refrigerants Section.

NO CHARGE

Check for leak. Use standard evacuating techniques. After

evacuating system, weigh in the specified amount of refrigerant

(refer to system rating plate).

LOW CHARGE COOLING

Use Cooling Charging Chart (Fig. 22). Vary refrigerant until the

conditions of the chart are met. Note that charging charts are

different from type normally used. Charts are based on charging the

units to correct subcooling for the various operating conditions.

Accurate pressure gauge and temperature sensing devices are

required. Connect the pressure gauge to the service port on the

suction line. Mount the temperature sensing device on the suction

line and insulate it so that the outdoor ambient does not affect the

reading. Indoor air CFM must be within the nornral operating range

of the unit.

TO USE COOLING CHARGING (;HARTS

Take the liquid line temperature and read the manifold pressure

gauges. Refer to the chart to determine what the liquid line

temperature should be.

NOTE: If the problem causing the inaccurate readings is a

refrigerant leak. refer to Check for Refrigerant Leaks section.

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

NOTE: Be sure that all supply- and return-air grilles are open. free

from obstructions, and adjusted properly.

Unit 50CR utilizes state of the art ECM (Electronic Computated

Motor) ID Blower Motors. See user interface instructions for

detailed information on adjusting airflow.

Step 5--Defrost Control

QUIET SHIFT

Quiet Shift is a field-selectable defrost mode, which will eliminate

occasional noise that could be heard at the start of defrost cycle and

restarting of heating cycle. It is selected by placing DIP switch 3 (on

defrost board) in ON position.

When Quiet Shift switch is placed in ON position, and a defrost is

initiated, the following sequence of operation will occur. Reversing

valve will energize, outdoor fan will turn off, compressor will turn

off for 30 sec and then turn back on to complete defrost. At the start

of heating after conclusion of defrost reversing valve will

de-energize, compressor will turn off for another 30 sec, and the

outdoor fan will stay off for 40 sec, before starting in the heating

mode.

DEFROST

The defrost control is a time/temperature control which includes a

field-selectable time period (DIP switch 1 and 2 on the board)

between defrost cycles of 30, 60, 90. or 120 minutes (factory set at

30 minutes).

To initiate a forced defrost, two options are available depending on

the status of the defrost thermostat.

If defrost thermostat is closed, speedup pins (J1) must be shorted by

placing a flat head screw driver in between for 5 sec and releasing,

to observe a complete defrost cycle. When the Quiet Shift switch is

selected, compressor will be turned off for two 30 sec intervals

during this complete defrost cycle, as explained previously. When

Quiet Shift switch is in factory default OFF position, a normal and

complete defrost cycle will be observed.

If defrost thermostat is in open position, and speedup pins are

shorted (with a flat head screw driver) for 5 sec and released, a short

defrost cycle will be observed (actual length is dependent upon the

selected Quiet Shift position). When Quiet Shift switch is in ON

position, the length of defrost is 1 minute (30 sec compressor off

period followed by 30 sec of defrost with compressor operation).

On return to heating operation, compressor will again turn off for an

additional 30 sec and the outdoor fan for 40 sec. When the Quiet

Shift is in OFF position, only a brief 30 sec cycle will be observed.

If it is desirable to observe a complete defrost in warmer weather, the

defrost thermostat must be closed as follows:

1. Turn off power to outdoor unit.

2. Disconnect outdoor fan motor lead from OF2 on control

board (See Fig. 23). Tape to prevent grounding.

3. Restart unit in heating mode, allowing frost to accumulate on

outdoor coil.

4. After a few minutes in heating mode, liquid-line

temperature should drop below closing point of defrost

thermostat (approximately 30°F).

NOTE: Unit will remain in defrost until defrost thermostat reopens

at approximately 80°F coil temperature at liquid line or remainder

of defrost cycle time.

5. Turn off power to outdoor and reconnect fan motor lead to

OF2 on control board after above forced defrost cycle.

NON-COMMUNICATING EMERGENCY COOLING /

HEATING MODE

This mode of operation is provided only in the case where the UI has

failed or is otherwise unavailable. If communications cannot be

established with the UI, the Infinity control board will enable the

following thermostat input terminals to allow simple thermostatic

control of the 50CR unit:

a. Y & O for cooling

b. W for electric heat (if applicable)

c. Y for heat pump heat

The Infinity control will respond to cooling and heating demands

with the maxinmm safe airflow based on electric heat size (if

applicable) and unit capacity.

Required Subcooling oF (oC! Required Lic_uid Line Temperature for a Specific Subcooling (R-4tOA!

Outdoor Ambient Temperature Required SubcooEng !°F) Required Subcooling (°C)

Model Size

O24

O30

O36

O42

O48

O60

CharqincLProcedure

t- Measure Discharge line pressure by attaching a gauge to the service port.

2- Measure the Liquid line temperature by attaching a temperature sensing

device to it.

3- insulate the temperature sensing device so that the Outdoor Ambient

doesn't affect the reading.

75 (24) 82 (25) 85 (29) 95 (35) 105 (4t) )ressurc

(peig) 5 10

tO,3 (5,7) 9,8(5,4) 9,4(5,2) 9(5) 8,6(4,7) t89 St 56

9,3(5.2) 8,8(4,9) 8,6(4,5) 7,8(4,3) 7(3,9) t96 63 58

t7,8 ( 9.8 ) 16,5(9.8) 18.8 t 9.2 ) t8.4 ( 8,8 ) 14,3(7,9) 203 88 81

t2,8 (7,1) 12.7 (7,t) 12,7(7,1) t2,6(7) 12.6(7) 210 68 63

t7,5 ( 9.7 ) 16.9(9,4) 16.6(9,2) t5.7 ( 8,7 ) 14,8(8.2) 217 70 65

13.7{7.8) t3 { 7.2 ) 13(7.2) 14.5(8.1) 11.5 ( 8.4 ) 224 72 87

231 74 69

238 76 71

245 77 72

252 79 74

260 81 78

268 83 78

276 85 80

284 87 82

Presstm

15 20 25 (kPa) 3 6 8 11 14

51 46 41 1303 16 13 11 8 5

53 48 43 1351 17 15 12 9 8

56 51 46 1399 19 16 13 10 8

58 53 48 1448 20 17 14 11 9

60 55 50 1498 21 18 15 13 10

62 57 52 1544 22 19 18 14 11

64 59 54 1598 23 20 18 15 12

66 61 56 1641 24 21 19 18 13

67 62 57 1689 25 22 20 17 14

69 64 59 1737 26 23 21 18 15

71 66 St 1792 27 25 22 19 16

73 68 53 1848 29 26 23 20 17

75 70 85 1903 30 27 24 21 19

77 72 87 1958 31 28 25 22 20

4- Refer to the required Subcooling in the table based on the model size and 292 89 84

the Outdoor Ambient temperature.

5- Interpolate if the Outdoor ambient temperature lies in between the table

values, Extrapolate if the temperature lies beyond the table range.

6- Find the Pressure Value in the table corresponding to the the measured

Pressure of the Compressor Discharge line.

7- Read across from the Pressure reading to obtain the Liquid line

temperature for a required SubcooEng

8- Add Charge if the measured temperature is higher than the table value,

79 74 89

300 91 88 81 76 71

309 93 88 83 78 73

318 95 90 85 80 75

327 97 92 87 82 77

336 99 94 89 84 79

345 101 98 91 86 81

354 103 98 93 88 83

364 105 100 95 90 85

374 107 102 97 92 87

384 108 103 98 93 88

394 110 105 100 95 90

404 112 107 102 97 92

414 114 109 104 99 94

424 116 111 106 101 96

434 118 113 108 103 98

444 119 114 109 104 99

454 121 116 111 106 101

464 123 118 113 108 103

474 124 119 114 109 104

484 126 121 118 111 106

494 127 122 117 112 107

504 129 124 119 114 109

514 131 126 121 118 111

524 132 127 122 117 112

534 134 129 124 119 114

Fig. 22 - Cooling Charging Table-Subcooling

2013 32 29 26 23 21

2088 33 30 27 24 22

2130 34 31 28 28 23

2192 35 32 29 27 24

2254 36 33 31 28 25

2318 37 34 32 29 26

2378 38 35 33 30 27

2440 39 36 34 31 28

2509 40 38 35 32 29

2578 41 39 36 33 30

2647 42 40 37 34 31

2718 44 41 38 35 32

2785 45 42 39 36 33

2854 46 43 40 37 34

2923 47 44 41 38 35

2992 48 45 42 39 36

3081 48 46 43 40 37

3130 49 47 44 41 38

3199 50 48 45 42 39

3268 51 48 46 48 40

3337 52 49 47 44 41

3408 53 50 47 45 42

3475 54 51 48 48 43

3544 55 52 49 48 44

3612 56 53 50 47 45

3681 56 54 51 48 45

C03027

Table 3--ECM Wet Coil Pressm_ Drop (in. wg)

UNIT STANDARD CFM (SCFM)

SIZE 600 700 800 9OO 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

024 0.005 0.007 0.010 0.012 0.015

030 0.007 0.010 0.012 0.015 0.018 0021 0024

036 0.019 0.023 0.027 0032 0037 0042 0.047

042 0.014 0.017 0020 0024 0027 0.031 0.035 0.039 0.043

048 0027 0032 0036 0.041 0.045 0.052 0.057 0.053 0.058

060 0.029 0.032 0.036 0.040 0.045 0.049 0.053

Table 4--Filter Pressure Drop Table (in. wg)

CFM

FILTER SIZE 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

20X20X1 0.05 0.07 0.08 0.1 0.12 0.13 0.14 0.15

24X30X1 0.05 0.6 0.07 0.07 0.08 0.09 0.1

24X36X1 0.06 0.07 0.07 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.14 0.14

Table 5--Electrlc Heat Pressure Drop Table

Small Cabinet: 024=036

GFM

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600

5 kw 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.08 0.07

7.2 kw 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.07 0.08 0.09

10 kw 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11

15 kw 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18

20 kw 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19

Table 6--Electric Heat Pressm'e Drop Table

Large Cabinet: 042-060

GFM

1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 21 O0 2200 2300 2400 2500

5kw 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12

7.2 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13

10 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13

15 kw 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15

20 kw 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16

o --- o

m r,o

_ --<:>-- O--C:)_

-<_ _ -C:>- -<=>-

o-C:D--

Speedup

Pins

-CZ3-

CESO1 30076-00

Quiet Defrost interval

Shift DIP switches

Fig. 23 -Defrost Control

MAINTENANCE

To ensure continuing high performance, and to nainimize the

possibility of premature equipment failure, periodic maintenance

must be performed on this equipment. This heat pump unit should

be inspected at least once each year by a qualified service person. To

troubleshoot unit. refer to Table 8, Troubleshooting (;hart.

NOTE TO EQUIPMENT OWNER: Consult your local dealer

about the availability of a maintenance contract.

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury

or death and possible unit component damage.

The ability to properly perform maintenance on this

equipment requires certain expertise, mechanical skills, tools

and equipment. If you do not possess these, do not attempt to

perform any maintenance on this equipment, other than those

procedures recommended in the Owner's Manual.

ELECTRICAL SHOCK HAZARD

Failure to follow these warnings could result in serious injury

or death:

1. Turn off electrical power to the unit before perfornring any

maintenance or service on this unit.

2. Use extreme caution when removing panels and parts.

3. Never place anything combustible either on or in contact

with the unit.

UNIT OPERATION HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Errors made when reconnecting wires may cause improper

and dangerous operation. Label all wires prior to

disconnecting when servicing.

Theminimummaintenancerequirementsforthisequipmentareas

follows:

1.Inspectairfilter(s)eachmonth.Cleanorreplacewhen

necessary.

2.Inspectindoorcoil,drainpan.andcondensatedraineach

coolingseasonforcleanliness.(;leanwhennecessary.

3.Inspectblowermotorandwheelforcleanlinesseachcooling

season.(;leanwhennecessary.

4.Checkelectricalconnectionsfortightnessandcontrolsfor

properoperationeachcoolingseason.Servicewhen

necessary.

StepI--Air Filter

IMPORTANT: Never operate the unit without asuitable air filter

in the return- air duct system. Always replace the filter with the same

dinmnsional size and type as originally installed. See Table 1 for

recommended filter sizes.

Inspect air filter(s) at least once each month and replace

(throwaway-type) or clean (cleanable-type) at least twice during

each cooling season and twice during the heating season, or

whenever the filter becomes clogged with dust and lint.

Step 2--Indoor Blower and Motor

NOTE: All motors are pre-lubricated. Do not attempt to lubricate

these motors.

For longer life, operating economy, and continuing efficiency, clean

accumulated dirt and grease from the blower wheel and motor

annually.

Step 4_Outdoor Fan

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit

components.

Keep the condenser fan free from all obstructions to ensure

proper cooling operation. Never place articles on top of the

unit.

1. Remove 6 screws holding outdoor grille and motor to top

cover.

2. Turn motor/grille assembly upside down on top cover to

expose fan blade.

3. Inspect the fan blades for cracks or bends.

4. If fan needs to be removed, loosen setscrew and slide fan off

motor shaft.

5. When replacing fan blade, position blade so that the hub is

1/8 in. away from the motor end (1/8 in. of motor shaft will

be visible) (See Fig. 24).

6. Ensure that set screw engages the flat area on the motor shaft

when tightening.

7. Replace grille.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Disconnect and tag electrical power to the unit before cleaning

and lubricating the blower motor and wheel.

Step 3--Outdoor (?oil, Indoor Coil, and Condensate

Drain Pan

Inspect the condenser coil. evaporator coil, and condensate drain

pan at least once each year.

The coils are easily cleaned when dry; therefore, inspect and clean

the coils either before or after each cooling season. Remove all

obstructions, including weeds and shrubs, that interfere with the

airflow through the condenser coil. Straighten bent fins with afin

comb. If coated with dirt or lint, clean the coils with a vacuum

cleaner, using the soft brush attachnmnt. Be careful not to bend the

fins. If coated with oil or grease, clean the coils with amild detergent

and water solution. Rinse coils with clear water, using agarden hose.

Be careful not to splash water on motors, insulation, wiring, or air

filter(s). For best results, spray condenser coil fins from inside to

outside the unit. On units with an outer and inner condenser coil, be

sure to clean between the coils. Be sure to flush all dirt and debris

from the unit base.

Inspect the drain pan and condensate drain line when inspecting the

coils. (;lean the drain pan and condensate drain by removing all

foreign matter from the pan. Flush the pan and drain trough with

clear water. Do not splash water on the insulation, motor, wiring, or

air filter(s). If the drain trough is restricted, clear it with a "plumbers

snake" or similar probe device.

Infinity Top

UNIT SIZE

024

030

036

042

048

060

"A" DIMENSION

Infinity

Fig. 24 - Fan Blade Clearance

A06035

Step 5--Electrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be

sure to turn off the electrical power to the unit.

Remove access panel to locate all the electrical controls and wiring.

Check all electrical connections for tightness. Tighten all screw

connections. If any smoky or burned connections are noticed,

disassemble the connection, clean all the parts, re-strip the wire end

and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace all the

panels. Start the unit, and observe at least one complete cooling

cycle to ensure proper operation. If discrepancies are observed in

operating cycle, or if a suspected malfunction has occurred, check

each electrical component with the proper electrical

instrumentation. Refer to the unit wiring label when making these

checks.

Balance Point Worksheet

CD o

C::t.

o° o 50

g,m

Bg- 4o

"- 30

:5 E

5 = 20

CO r-

-2O -10 0 10 20 30 40 50

Outdoor Air Temp (Deg F)

O60

048

042

036

030

024

Fig. 25 - 50CR Balance Point Worksheet

C03008

Step 6--Refi*igerant Circuit

Inspect all refrigerant tubing connections and the unit base for oil

accunmlation annually. Detecting oil generally indicates a

refrigerant leak.

If oil is detected or if low performance is suspected, leak test all

refrigerant tubing using an electronic leak detector, or liquid-soap

solution. If a refrigerant leak is detected, refer to Check for

Refrigerant Leaks section.

If no refrigerant leaks are found and low performance is suspected,

refer to Checking and Adjusting Refrigerant Charge section.

Step 7--Indoor Airflow

The heating and/or cooling airflow does not require checking unless

improper performance is suspected. If a problem exists, be sure that

all supply- and return-air grilles are open and free from

obstructions, and that the air filter is clean.

Step 8--Metering Devices-TXV & Accurater Piston

This unit uses 2 types of nmtering devices. The outdoor metering

device is a fixed orifice and is contained in the brass- hex body in the

liquid line feeding the outdoor coils. The indoor metering device is

a TXV-type device.

Step 9--Pressure Switches

Pressure switches are protective devices wired into control circuit

(low voltage). They shut off compressor if abnormally high or low

pressures are present in the refrigeration circuit. These pressure

switches are specifically designed to operate with Puron (R-410A)

systems. R-22 pressure switches must not be used as replacements

for the Puron (R-410A) system.

Fig. 26 - Refrigerant Circuit

C99097

Step 10--Loss-of-Charge Switch

This switch is located on the liquid line and protects against low

suction pressures caused by such events as loss of charge, low

airflowacrossindoorcoil,dirtyfilters,etc.Itopensonapressure

dropatabout20psig.Ifsystempressureisabovethis,switchshould

beclosed.Tocheckswitch:

1.Turnoffallpowertounit.

2.Disconnectleadsonswitch.

3.Applyohmmeterleadsacrossswitch.Youshouldhave

continuityonagoodswitch.

NOTE:Becausetheseswitchesareattachedtorefrigerationsystem

underpressure,it isnotadvisableto removethisdevicefor

troubleshootingunlessyouarereasonablycertainthataproblem

exists.Ifswitchmustberemoved,removeandrecoverallsystem

chargesothatpressuregaugesread0 psi.Neveropensystem

withoutbreakingvacuumwithdrynitrogen.

Stepll--High-Pressure Switch

The high-pressure switch is located in the discharge line and

protects against excessive condenser coil pressure. It opens at 650

psig.

High pressure may be caused by a dirty outdoor coil, failed fan

motor, or outdoor air recirculation.

To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohm meter leads across switch. You should have

continuity on a good switch.

Step 12--Copeland Scroll Compressor (Puron Refrigerant)

The compressor used in this product is specifically designed to

operate with Puron (R-410A) refrigerant and cannot be

interchanged.

The compressor is an electrical (as well as mechanical) device.

Exercise extreme caution when working near compressors. Power

should be shut off, if possible, for most troubleshooting techniques.

Refrigerants present additional safety hazards.

EXPLOSION, FIRE, ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death and/or property damage.

Wear safety glasses and gloves when handling refrigerants.

Keep torches and other ignition sources away from

refrigerants and oils.

The scroll compressor pumps refrigerant throughout the system by

the interaction of a stationary and an orbiting scroll. The scroll

compressor has no dynamic suction or discharge valves, and it is

more tolerant of stresses caused by debris, liquid slugging, and

flooded starts. The compressor is equipped with an anti-rotational

device and an internal pressure-relief port. The anti-rotational

device prevents the scroll from turning backwards and replaces the

need for a cycle protector. The pressure-relief port is a safety device,

designed to protect against extreme high pressure. The relief port

has an operating range between 550 and 625 psi differential

pressure.

The Copeland scroll compressor uses Mobil 3MA POE oil. This

is the only oil allowed for oil recharge.

Step 13--Refrigerant System

This step covers the refrigerant system of the 50CR, including the

compressor oil needed, servicing systems on roofs containing

synthetic materials, the filter drier, and refrigerant charging.

REFRIGERANT

PERSONAL INJURY, UNIT OPERATION HAZARD

Failure to follow this caution may result in personal injury,

equipment damage or improper operation.

This system uses Puron (R-410A) refrigerant which has

higher operating pressures than R-22 and other refrigerants.

No other refrigerant may be used in this system. (_auge set,

hoses, and recovery system must be designed to handle Puron.

If you are unsure, consult the equipment manufacturer.

COMPRESSOR OIL

The compressor in this system uses a polyolester (POE) oil, Mobil

3MA POE. This oil is extremely hygroscopic, meaning it absorbs

water readily. POE oils can absorb 15 times as much water as other

oils designed for HCFC and CFC refrigerants. Take all necessary

precautions to avoid exposure of the oil to the atmosphere.

SERVICING SYSTEMS ON ROOFS WITH SYNTHETIC

MATERIALS

POE (polyolester) compressor lubricants are known to cause long

term damage to some synthetic roofing materials.

Exposure, even if inmmdiately cleaned up, may cause

embrittlement (leading to cracking) to occur in one year or more.

When performing any service that may risk exposure of compressor

oil to the roof. take appropriate precautions to protect roofing.

Procedures which risk oil leakage include, but are not limited to,

compressor replacement, repairing refrigerant leaks, and replacing

refrigerant components such as filter drier, pressure switch.

metering device, coil. accunmlator, or reversing valve.

Synthetic Roof Precautionary Procedure

1. (;over extended roof working area with an impermeable

polyethylene (plastic) drip cloth or tarp. (;over an

approximate 10 X 10 ft area.

2. (;over area in front of the unit service panel with a terry cloth

shop towel to absorb lubricant spills and prevent run-offs,

and protect drop cloth from tears caused by tools or

components.

3. Place terry cloth shop towel inside unit imnmdiately under

component(s) to be serviced and prevent lubricant run-offs

through the louvered openings in the unit base.

4. Perform required service.

5. Remove and dispose of any oil-contaminated material per

local codes.

LIQUID-LINE FILTER DRIER

The biflow filter drier is specifically designed to operate with Puron.

Use only factory-authorized components. Filter drier must be

replaced whenever the refrigerant system is opened. When

removing a filter drier, use a tubing cutter to cut the drier from the

system. Do not unsweat a filter drier from the system. Heat from

unsweating will release moisture and contaminants from drier into

system.

PURON (R-410A) REFRIGERANT CHARGING

Refer to unit information plate and charging chart. Some R-410A

refrigerant cylinders contain a dip tube to allow liquid

refrigerant to flow from cylinder in upright position. For

cylinders equipped with aclip tube. charge Pnron (_: units with

cylinder in upright position and a commercial nmtering device in

manifold hose. Charge refrigerant into suction line.

Step 14--System Information

LOSS-OF-CHARGE SWITCH

The loss of charge switch is a protective device wired into control

circuit (low voltage). It shuts off the compressor if abnormally low

pressures are present in the refrigeration circuit.

NOTE: Because these switches are attached to refrigeration system

under pressure, it is not advisable to remove this device for

troubleshooting unless you are reasonably certain that a problem

exists. If switch must be removed, remove and recover all system

charge so that pressure gauges read 0 psi. Never open system

without breaking vacuum with dry nitrogen.

CHECK DEFROST THERMOSTAT

There is a liquid header with a brass distributor and feeder tube

going into outdoor coil. At the end of one of the feeder tubes, there

is a 3/8-in. OD stub tube approximately 3 in. long (See Fig. 27). The

defrost thermostat should be located on stub tube.

NOTE: There is only one stub tube used with liquid header, and on

most units it is the bottom circuit.

The defrost thermostat signals heat pump that conditions are right

for defrost or that conditions have changed to terminate defrost. It

is a thermally-actuated switch clamped to outdoor coil to sense its

temperature. Normal temperature range is closed at 30 ° -+ 3°F and

open at 80 ° -+5°E

TROUBLESHOOTING

Refer to the Cooling and Heating Troubleshooting (;hart (Table 7)

for troubleshooting information.

START-UP CHECKLIST

Use the Start-Up Checklist at the back of this manual.

Defrost

Sensor_

Unit Top

Detail A

Fig. 27 - Defrost Sensor Location

A06068

HEAT PUMP WITH PURON

REFRIGERATION SECTION QUICK-REFERENCE GUIDE

Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipnaent and replacement components are

designed to operate with Puron. Puron refrigerant cylinders are rose colored.

• Puron refrigerant cylinders manufactured prior to March 1. 1999, have a dip tube that allows liquid to flow out of cylinder in

upright position. Cylinders manufactured March 1, 1999 and later DO NOT have a dip tube and MUST be positioned upside down

to allow liquid to flow.

• Recovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400.

• Puron systems should be charged with liquid refrigerant. Use a commercial-type metering device in the manifold hose.

• Manifold sets should be 750 psig high side and 200 psig low side with 520 psig low side retard.

• Use hoses with 750 psig service pressure rating.

• Leak detectors should be designed to detect HFC refrigerant.

• Puron, as with other HFCs. is only compatible with POE oils.

• Vacuum pumps will not remove moisture from oil.

• Only use factory-specified liquid-line filter driers with rated working pressures no less than 600 psig.

• Do not install a suction-line filter drier in liquid line.

• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.

• POE oils may cause damage to certain plastics and roofing materials.

• Wrap all filter driers and service valves with ,,vet cloth when brazing.

• A Puron liquid-line filter drier is required on every unit.

• Do not use an R-22 TXV.

•Never open system to atmosphere while it is under a vacuum.

• When system must be opened for service, break vacuum with dry nitrogen and replace filter driers.

• Do not vent Puron into the atmosphere.

• Observe all warnings_ cautions_ and bold text.

• Do not leave Puron suction line driers in place for more than 72 hrs.

Table 7 Troubleshooting Chart

SYMPTOM

Compressor and outdoor fan

will not start

Compressor will not start but condenser fan

rune

Three-phase scroll compressor (size 030-

060 unit) has a low pressure differential

Compressor cycles (other than normally satis-

fying) cooling/heating sails

Compressor operates continuously

Excessive head pressure

(Continued next page)

CAUSE

Power failure

Fuse blown or circuit breaker tripped

Defective contactor, transformer, control relay, defrost

board, or high-pressure, loss-

of-charge or low-pressure switch

REMEDY

Call power company

Replace fuse or reset circuit breaker

Replace component

Insufficient line voltage

Incorrect or faulty wiring

User Interface setting too low/too high

Units have a 5-minute time delay

Faulty wiring or circuit

Loose connections in compressor

Compressor motor burned out, seized, or

internal overload open

Defective run capacitor, overload, or PTC (positive

temperature coefficient) thermistor

One leg of 3-phase power dead

Low input voltage (20 percent low)

Scroll compressor is rotating in the wrong direction

Refrigerant overcharge or undercharge

Defective compressor

Insufficient line voltage

Blocked outdoor coil

Defective run/start capacitor, overload or start relay

Faulty outdoor fan motor or capacitor

Damaged reversing valve

Restriction in refrigerant system

Dirty air filter

Unit undersized for load

UI temperature set too low/too high

Low refrigerant charge

Frosted coil with incorrect defrost operation

Air in system

Outdoor coil dirty or restricted

Dirty air filter

Dirty indoor or outdoor coil

Refrigerant overcharged

Air in system

(Heat) Indoor air restricted or recirculating

Indoor or outdoor air restricted or air short-cycling

Determine cause and correct

Check wiring diagram and rewire correctly

Reset UI setting

DO NOT bypass this compressor time

delay wait for 5 minutes until time-delay

relay is de-energized

Check wiring and repair or replace

Determine cause

Replace compressor

Determine cause and replace

Replace fuse or reset circuit breaker

Determine cause

Determine cause and correct

Correct the direction of rotation by reversing the

3-phase power leads to the unit

Recover refrigerant, evacuate system, and re-

charge to capacities shown on rating plate

Replace and determine cause

Determine cause and correct

Determine cause and replace

Replace

Determine cause and correct

Locate restriction and remove

Replace filter

Decrease load or increase unit size

Reset UI setting

Locate leak, repair, and recharge

Check defrost time settings

Reset as necessary

Check defrost temperature switch

Replace as necessary

Recover refrigerant, evacuate system, and re-

charge

Clean coil or remove restriction

Replace filter

Clean coil

Recover excess refrigerant

Recover refrigerant, evacuate system, and re-

charge

Determine cause and correct

Table 7Troubleshooting ('hart (Cont'd)

SYMPTOM

Head pressure too low

Excessive suction pressure

Suction pressure too low

Compressor runs but outdoor fan does not

IFM does not run

iFM operation is intermittent

IFM Indoor Fan Motor

CAUSE

Low refrigerant charge

Restriction in liquid tube

(Cool) High Heat load

Reversing valve hung up or leaking internally

Refrigerant overcharged

(Cool) Dirty air filter

(Heat) Outdoor coil frosted

Low refrigerant charge

Metering device or low side restricted

(Cool) Insufficient coil airflow

(Cool) Temperature too low in conditioned area

(Cool) Outdoor ambient below 55°F

Filter drier restricted

NO (normally closed) contacts on defrost board

open

Blower wheel not secured to shaft

Insufficient voltage at motor

Power connectors not properly sealed

Water dripping into motor

Connectors not firmly sealed

REMEDY

Check for leaks, repair and recharge

Remove restriction

Check for source and eliminate

Replace valve

Recover excess refrigerant

Replace filter

Move timer on control board to 30 minutes between

defrost cycles

Check for leaks, repair and recharge

Remove source of restriction

Increase air quantity

Check filte_replace if necessary

Reset UI setting

Install low-ambient kit

Replace

Check condition of relay on board

Replace if necessary

Properly tighten blower wheel to shaft

Determine cause and correct

Connectors should snap easily; do not force

Verify proper drip loops in connector wires

Gently pull wires individually to be sure they are

crimped into the housing

I. Preliminary information

MODEL NO.:

SERIAL NO.:

DATE:

TECHNICIAN:

START=UP CHECKLIST

(Remove and Store in Job File)

IL PRE-START=UP (insert checkmark in box as each item is completed)

VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNiT

REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS

CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE)

CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE

VERIFY THAT UNIT INSTALLATION IS LEVEL

CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS

MAKE SURE THAT - (If Applicable) ON 060 SIZE PURON HEATPUMP ONLY, THE TWO WIRE TIES FASTEN

TO THE OUTDOOR COILS AND REVERSING VALVE/ACCUMULATOR HAVE BEEN REMOVED

ill. START-UP

ELECTRICAL

SUPPLY VOLTAGE

COMPRESSOR AMPS

INDOOR (EVAPORATOR) FAN AMPS

TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR

HEAT PUMP SUPPLY AIR

ELECTRIC HEAT SUPPLY AIR

PRESSURES

REFRIGERANT SUCTION

REFRIGERANT DISCHARGE

DB WB

PSIG SUCTION LINE TEMP*

PSIG DISCHARGE TEMPt

( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

*Measured at suction inlet to compressor

tMeasured at liquid line leaving condenser.

A05306

Manufacturer reserves the right to change_ at any time_ specifications and designs without notice and without obligations,

.32

Catalog No: 50CR-1SI

Replaces: New

CARRIER Package Units(both Units Combined) Manual L0605138

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