Carrier 50JZ036310, 50JZ042300, 50JZ048300, 50JZ060300, 50JZ036300 Installation Guide

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Page 1

HE_ATtNG & COOLING

ViSil "WWw.catTICr.CORI

Installation, Start-Up, and Service Instructions

NOTE: Read the entire instruction manual before starting the

installation.

This symbol --_ indicates a change since the last issue.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS ..................................................... l

Introduction .................................................................................... 4

Receiving and Installation .............................................................. 4

Check Equipment ...................................................................... 4

Provide Unit Support ................................................................ 4

Provide Clearances .................................................................... 6

Rig and Place Unit .................................................................... 6

Select and Install Ductwork ..................................................... 7

Provide for Condensate Disposal ............................................. 8

Install Electrical Connections ................................................... 8

PRE-START-UP .......................................................................... lO

START- U P ................................................................................... 16

Check for Refrigerant Leaks .................................................. 16

Start-Up Adjustments .............................................................. 16

Defrost Control ....................................................................... 19

MAINTENANCE ......................................................................... 21

Air Filter .................................................................................. 22

Indoor Blower and Motor ....................................................... 22

Outdoor Coil, Indoor Coil, and Condensate Drain Pan ........ 22

Outdoor Fan ............................................................................ 23

Electrical Controls and Wiring ............................................... 23

Refrigerant Circuit .................................................................. 23

Indoor Airflow ........................................................................ 23

Metering Devices-Accurater Piston ....................................... 23

Pressure Switches .................................................................... 23

Loss of Charge Switch ........................................................... 23

High-Pressure Switch .............................................................. 23

Copeland Scroll Compressor (Puron Refrigerant) ................. 23

Refrigerant System .................................................................. 24

System Information ................................................................. 24

TROUBLESHOOTING ............................................................... 25

Sta_-Up Checklist ........................................................................ 25

NOTE TO INSTALLER -- READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY before installing this unit.

Also, make sure the Owner's Manual and Service Instructions are left with the unit after installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be

hazardous due to system pressure and electrical components. Only trained and qualified personnel should install repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of cleaning coils and filters. All other operations should be performed

50JZ024-060

Single-Package Heat Pump Units

with Puron (R-410A) Refrigerant

C99064

Fig. 1--Unit 50JZ

by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags, and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher

available for all brazing operations.

Improper installation, adjustment, alteration, service, mainte- nance, or use can cause explosion, fire. electric shock, or

other occurrences, which could cause serious injury or death or damage your property. Consult a qualified installer or service agency for information or assistance. The qualified

installer or agency must use only factory-authorized kits or accessories when modifying this product.

Recognize safety information. TItis is the safety-alert symbol_. When you see this symbol on the product or in instructions or

manuals, be alert to the potential for personal injury. Understand the signal words -- DANGER, WARNING, CAU-

TION, and NOTE. Danger identifies the most serious hazards. which will result in severe personal injury or death. Warning

indicates a condition that could cause serious personal injury or

death. Caution is used to identify unsafe practices, which would 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.

Manufacturer rese_ve_ the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book t 4 PC t0t Catalo<j NO. 535_0020 Printed in U.S.A. Form 50JZ-2SI Pg 1 12-00 Re#aces: 50JZ-t SI

Page 2

_IlO 00]

• * i i

fULL LOUVER

{16 00)

TOP VIEW

_TOC_IilJ611IJEMA'iL

TOP OF UNII ................. )556 114 00]

DUCT SISE OF UNIT ..... 50 8 (2 001

SIDE OPPO$1f[ DUCTS .... 3556 [14¸001

BOT10H OF UNIT .......... 121 1050]

ELECTRIC H[_1 PANEL.............. g14 4 []6 00}

NE_ REOURm_

BETWEEN UNITS, POIII[R [NIRY Sll)[ ...... IOGG8 [47 OO}

UNI1 AND UNgROUNDEd) SURFACES, POW[_ ENTRY S_O[ ..... 914 0 [36 00}

UNI[ ANO BLOCK OR CONCRETE WALLS AND OIH[r

GROURD[II SURFACES, POWER ENTRY SIO[ ...... i0666 [42 00]

MILLIMETERS FIN]

MILL ll4[ TERS (IN]

SUPPLV

DUCl OPEniNG

249¸6

[983]

--5505

[2[ 67]

TURN

CT [NIN

19 6

[9 83]

REARVIEW

[VAP COIL ACCESS SIDE ........................ 914 0 [36¸00)

POWER [NTRT SIDE................ 9[4¸0 [3600]

(EXCEPT for N[C R[OUIREM[NTS}

UNIT TOP ...................... 914 0 [3600]

$1D[ OPPOSITE OUCTS .................... 91_0 [36,00]

DUCT PANEL........................ 304 8 [I?00]*

*MINIMUMDISTANCES IF UNIT IS PLACEDLESS THAN 304 8 [12 OOJFROIKWALL

SYSTEMT_[N SYSTEMP[RFOttMANC[MkYfi[ COMPROMISED

MILLIMETERS FIN]

.-.)

UNIT

50JZ024 50JZ030

50JZ036

FULL LOUV[_

?? ? 1o BBI OqA HOL£

C_tROL ZNtRt_

[10 8 I 13 _ T

fULL LOUV[R

I 1 , L

h_l?? ?

[4 811

LEFT SIDE VIEW FRONTVIEW RIGHT SIDEVIEW

ELECTRICAL CHARACTERISTICS

UNIT WEIGHT

Ib, kg

208/230-1-60 299 135.6 208/230-1-60,208/230-3-60 320 145.2

208/230-1-60,208/230-3-60, 460-3-60 328 148.8

UNIT HEIGHT

IN. (MM)

"A" X

35.02 (889,5) 19.0 (482,6)

37.02 (940.3) 20,0 (508.0) 37,02 (940.3) 20.0 (508.0)

CENTER OF GRAVITY

IN. (MM)

18.3 (463.6)

19.3 (489,0)

19.0 (482.6)

Fig, 2--50JZ024-036 Unit Dimensions

io 20

CC0160

16.0 (406.4)

17.6 (447.0)

16.5 (419.1)

Page 3

• = . , ,,

.j DIlL LOIIVER _L'

m <1

TOPVIEW

REOtlB_ _ lo COMBUSTIBLE MATL

TOP OF U_IT ........ 35_ IJ_ OO]

_UCT SIDE Of UNI1 SO B I_ 00} SIDE OPPOSITE DUCTS 35S 6 [14 001 BOttOMOf UNiT . i? 1 [o Sol

ELECTRIC HEAl PANEL ..... 914 4 [3b DO]

{_C• RB1URED CI_.ARANCES.

B[TWE[_ UNITS, POWER ENIRY SIDE IOGI,8 [_2 OOI UNIT AND UNGROUNDED SURFACES POWERENTRI SiDZ 9_4 O 136 GO]

UNIT AND BLOC_ OR (ONCRZT£ WALLS AND OIH[R GROUNDED SURFACES, POWER ENTRT SIDE 106_ 8 {42 00)

Mit LIf4ETERS {IN]

WILLIW[1ERS [INI

4DE (I

115 831

II? 1 14 63]

SUPPLy R[TUNN I

DUCT - _UCI l"

OPENIN G OPENING

r i , , i jl

--8T 2 P,,-347 3

_35q ? _351 2

113831 [13 831

REAR ViEW

R£(ZURB) _ F_t (_/L'i'K_ A/_ SI_VII:IN6

_VAR COiL ACCESS SI_[ • • • _14 0 [36 00] _OWER ENTRY SIDE 914 0 {3_ 001 (EXC[P1 PO_ N_C R[OUlR[MENTSi

UNll TOP .......... _ 0 {3G 00}

_IDE OPPOSITE OUCTS ...... _14 0 [3_ OO]

bUC! PANEL ...... _04 8 {12 00]_

tMINIMU_ OlSIANCES IF UNIT I_ PLACZO LESS THAN 3Oa 8 I1200] FRO_ WALL

DIMENSIONS IN I] ARE IN INCHES

_ILLIMEFERS IIN]

UNIT

50JZ042 50JZ048 50JZO60

ELECTRICAL CHARACTERISTICS

208/230-1.60, 208/230-3.60, 460-3.60 350 158.8 208/230-1.60, 208/230-3-60, 460-3-60 365 161.0 208/230-1-60, 208_230-3.60, 460-3-60 428 194.1

Fig. 3--50JZ 042-060 Unit Dimensions

UNIT WEIGHT

lb. kg

UNIT HEIGHT

IN. (MM)

,,A,,

40.98 (1040.9) 40,98 (1040,9) 42,98 (1091.7)

_ULt LO_V{r

;_l lid _1 o,, .o_iI _ '-

i?? o --

RIGHT SIDE VIEW

CENTER OF GRAVITY

IN. (MM)

X Y Z

21,0 (533,4) 20.5 (520,7) 16.6 (421,6)

20.0 (508.0) 21,3 (539,8) 18,0 (457.2)

21.0 (533.4) 20.0 (508,0) 17.6 (447,0)

{o i_]

(300161

Page 4

1 2

CORNER WEIGHTS (SMALL CABINET) CORNER WEIGHTS (LARGE CABINET)

Unit

1. The power supply (volts, phase, and hertz) must correspond to

that specified on unit rating plate.

2. The electrical supply provided by the utility must be sufficient to handle load imposed by this unit.

3. This installation must conform with local building codes and with NEC (National Electrical Code). Refer to provincial and local plumbing or waste water codes and other applicable local

codes.

Before performing service or maintenance operations on system, turnoff main power to unit. Turn off accessory heater

power switch if applicable. Electrical shock could cause severe injmy or death.

Puron (R_I-10A) systems operate at higher pressures than standard R-22 systems. DO not use R-22 service equipment or components on Puron (R4 10A t equipment. Ensure service

equipment is rated for Puron (RMIOA)

Tbe 50JZ heat ptanp is fully self contained and designed for outdoor installation (See Fig. 1). 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.

Tnt_l W_inht

Comer Weight t Comer Weight 2

Comer Weight 3 Comer Weight 4

INTRODUCTION

299

63 62

118

30 36

63 64

74 76 56 58

127 130

FJg. 4_CornerWeights

Unit

N Total Weight

..j o

m Comer Weight 1

• Comer Weight 210

Step 1.---Check Equipment

IDENTIFY UNIT

The unit model number and serial number are stamped on the unit identification plate. Check this information against shipping pa-

pet's.

INSPECT SHIPMENT Inspect for shipping damage while unit is still on shipping pallet.

If unit appears to be damaged or is tom loose from its anchorage, have it examined by transportation inspectors before removal. Forward claim papers directly to transportation company• Manu- facturer is not responsible for any damage incurred in transit.

Check all items against shipping list. Immediately notify the nearest Carder 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

ROOF CURB

Install accessory roof curb in accordance with instructions shipped with curb (See Fig. 5). Install insulation, cant strips, roofing, and

flashing. Duetwork must be attached to curb.

IMPORTANT: The go.¢keting of the unit to the roof curb is critical for a watertight 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. 6). This is necessary for unit drain to function properly. Refer to accessory

roof curb installation instructions for additional information as required.

Comer Weight 3

Comer Weight 4

RECEIVING AND INSTALLATION

350

75 49

131

48 60

355 428

76 92 50 60

96 116

133 160

000071

Page 5

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.

R/A

_-_Gasket around'_

duct

\ /

\\, /

'\\ /

S/A

' \

Insulated deck pan

UNIT SIZE ODS CATALOG NUMBER iN. (MM)

50JZ024-036

50JZ042-060

NOTES:

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

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

3. Dimensions in ( ) are in millimeters.

4. Roof curb is made of 16-gage steel.

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

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

7. Insulated panels: 1-in. thick fiberglass 1 Ib 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 cede for hurdcane or seismic conditions. This bracket is available through Micromet[

--)

CPRFCURB006A00 8 (203) CPRFCURB007AO0 14 (356) CPRFCURB008AO0 8 (203) CPRFCURB009AO0 14 (356)

Fig. 5_Roof Curb Dimensions

IN. (MM)

11(279) 11(279)

163/16 (411) 16 3/16 (411)

Gasket around

outer edge \\

IN. (MM) 161/2 (419) 161/2 (419)

17 3/8 (441) 17 3/8 (441)

IN. (MM)

28-3/4 (730) 28-3/4 (730)

40-1/4 (1022)

C00076

Page 6

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

A-B B-C / A-C

t/4 1/4 1/4

C99065

Fig. 6---Unit Leveling Tolerances

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

4 in. thick with 2 in. above grade (See Fig. 71. The slab should extend approximately 2 in. beyond the casing on all 4 sides of the unit. Do not secure the unit to the slab except when required by

local codes.

Step 4_Rig and Place Unit

Rigging and handling of this equipment can be hazardous for many reasons due 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, obserxe precautions in the literature, on tags, stickers, and labels attached to the equipment,

and any other salety precautions that might apply. 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 d_nage, 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 an) kind of wear in these

areas must not be used and should be discarded.

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 Figs. 2 and

3. Adequate ventilation and outdoor air must be provided. The outdoor fan draws air through the outdoor coil and discharges it through the top fan grill. Be sure that the fan discharge does not

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

comer or under an overhead obstruction. The minimum clearance

under a partial overhang (such _s 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.

INSTALLATION

I. Remove unit from shipping carton. Leave top shipping skid on

the unit as a spreader bar to prevent the rigging straps from damaging the unit. If the wood skid is not available, use a spreader bar of sufficient length to protect unit from damage.

2. Position the lifting bracket assembly around the base of the unit. Be sure thestrap does not twist.

3. Place each of the 4 metal lifting brackets into the handholds in the composite pan.

4. Thread lifting bracket strapping around bot/om perimeter of

unit 0s follows: a. Open lever of tension buckle (ratchet type). b. Feed strapping through tension buckle as shown in Fig. 8. c. Pull strapping through tension buckle unit taut.

d. Snap lever down to lock strap in tension buckle. To release

strapping, squeeze safety latch, lift lever, and pull webbing outward.

5. Tighten the tension buckle until it is taut. Lifting brackets must be secure in the handholds.

6, Attach field-supplied clevis or hook of sufficient strength to

hole in the lifting bracket (See Fig. 91.

EVAI_ COIL COND. COIL

Fig. 7--Slab Mounting Detail

C90096

Page 7

HOOK

FEED

C99067

Fig. 8---Threading Belt

914-137"

136"-54")

SCALE0 250

tIGHTEN STRAPPING SECURELY WfTH TENSION BUCKLE

INSTALL SAFE I_" _TRAPS TO

RIGGING CLEVI_ AT 4 RIGGING BRACKET_

PLACE RIGGING BRACKET A_SEMBLY IN 4 HANO HOLES AND INSTALL TIE DOWN STRAP ARODND PERIMETER OF UNIT AND THROUGH

SPACE IN BRACKET ASSEMBLy

C99075

UNIT MAXIMUM WEIGHT A B

Size lb. kg in. mm. in, mm.

50JZ024 321 145.6 19.0 482.6 18.25 463.6 50JZ030 342 155.2 20.0 508 19,25 489

50JZ036 I 350 158.8 20.0 508 19.0 482.6 80JZ042 372 168,8 21.0 533.4 20.5 520.7 50JZ048 377 171.0 20.0 508 21.25 539.8

50JZ060 450 204.2 21.0 533.4 20.0 508.0

Fig. 9--Suggested Rigging

7. Attach the 2 safety straps directly to the clevis or hook at the

4 rigging brackets. DO NOT attach the safety straps to the lifting brackets (See Fig. 9}.

8. Position lifting point directly over the tmit's center of _avity.

9. Lift unit. When unit is directly over the roof curb. remove the 2 safety straps. Lower the equipment onto the roof curb.

10. After the unit is placed on the roofcurb or mounting pad, remove [he top crating. On 50JZ060 units only, 2 wire ties fastened to the outdoor coils and reversing valve/accumulator assembly must be cut. Remove the left and front louver panels and corner post to access wire ties. The wire tie to he cut on the left is located approximately 4" down the tube sheet. The wire tie to be cut on the right is located approximately 6"

down the tube sheet.

Step 5--Select and Install Ductwork

The design and installation of the duct system must be in accordance with the standards of the NFPA for installation of

D_TAIL A

non-residence type air conditioning and ventilating systems, NFPA 9flA or residence type. NFPA 90B and/or local codes and ordi

nantes.

Select and size ductwork, supply-air registers, and return air grilles according to ASHRAE (Amefican Society of Heating, Refrigera

tion, and Air Conditioning Engineers) recommendations. The unit has duct flanges on the supply and return-air openings on

the side of the unit.

When designing and installing ductwork, consider the following:

For vertical supply and return units, tools or parts could drop into ductwork and cause serious injury or death. Install a 90

de_ee 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.

I. 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 perforroance.

IMPORTANT: Use flexible connectors between ductwork and unit to prevent transmission of vibration. Use suitable gaskets Io

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 cooling air quantity (cfm). The minimum air quantity for proper electric heater operation is listed in

Table 2. Heater limit switches may trip at air quantities below those recommended.

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) mini- mum installation standards for residential heating and air conditioning system_.

5. Secure all ducts to building structure. Flash, weatherprooL and

vibration-isolate duct openings in wail or roof according to good construction practices.

CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE UNITS

serious injury or death.

1. Open all electrical disconnects before starting any service

work.

2. Remove horizontal duct covers to access bottom return and

supply knock out panels.

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

bottom of the bzL_e pan.

Page 8

Table 1--Physical Data--Unit 50JZ

UNIT SIZE NOMINAL CAPACITY (ton) OPERATING WEIGHT (lb.)

COMPRESSOR QUANTITY

TYPE

REFRIGERANT

REFRIGERANT METERING DEVICE

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

ORIFICE ID (in.)

ORIFICE OD (in,)

OUTDOOR COIL

Rows.,. Fins/in.

face area (sq. ft.)

OUTDOOR FAN

Nominal Airflow (CFM)

Diameter

Motor HP (RPM)

INDOOR COIL

Rows._ Fins/in.

face area (sq. ft.)

INDOOR SLOWER

Nominal Airflow (CFM_

Size (in,)

Motor (HP)

HIGH-PRESSURE SWITCH (psig)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

RETURN-AIR FILTERS (in._"

• Required tilter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 if/minute for throwaway type or 450 if/minute for high-capacity type. Air tilter pressure drop for non-standard filters must not exceed 0.08 in. wg.

Cutout

Reset (Auto)

(Liquid Line) (psig)

Cutout

Reset (Auto)

throwaway

50JZ024 I 50JZ030 50JZ036 50JZ042 50JZ048 I 50JZ060

2 I 2-1/2 3 3-1/2 4 I 5299 320 328 350 355 428

SCROLL COMPRESSOR

R-410A

Accurater

7.0 8.9 9.3 9.5 10,6 12.4

0.061 0.061 0.067 0.073 0.076 0.088

0.032 (2) 0.040 (2) 0.040 (2) 0.038 (2) 0.046 (2) 0.052 (2)

2...17 2...17 2...17 2...J7 2..._7 2...17

8.5 10.3 10.3 13.5 13.5 15.4

2350 2350 2800 2500 3300 3300

22 22 22 22 22 22

1/8 (825) 1/8 (825) 1/4 (1100) 1/8 (825) 1/4 (1100) 1/4 (1100)

3...15 3...15 4...15 3...15 4...15 4,..15

3.7 3.7 3.7 4.7 4.7 / 5.7

10x10 10x10 10x10 11x10 11x10 11x10

800 1000 1200 1400 1600 / 1750

1/4 1/4 1/2 1/2 1/2 1

610 ± 15

420 ± 25

20± 5

45± 10

20x20x1f20x20Xli 20x2,xlf24x30 1f 24x30Xlf 2,x30x1

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

4. Reinstall the horizontal duct covers (Fig, 11) to block off the

horizontal air openings.

NOTE: Avoid abrupt duct size increases anti reductions. Abrupt change in duct size adversely affects air performance.

Step 6--Provide for Condensate Disposal NOTE: Ensure that condensate-water disposal methods comply

with local codes, restrictions, and practices.

The 50JZ 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 installa-

tions, 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 I 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. Conden,_ate trap is available as an accessory or is field supplied. Make sure that the outlet of the

trap is at least I 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-gupplJed 314 .in. copper pil)_ _ outh_l elt_ of _ 2 -in. (See Fig. 12). Do not undersize the tube. Pitch the drain trough

downward at a slope of at least 1 in. 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.

Step 7_nstall Electrical Connections

r_ 'kk_r:_ttLllT[d

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 lug

in tile_ontrol compartment, or conduit approved for electrica_

ground when installed in accordance with NEC, ANSI/NFPA American National Standards Institute/National Fire Protec-

tion Association (latest edition) iin Canada, Canadian Elec- trical Code CSA C22.1) and local electrical codes. Failure to

adhere to this warning could result in serious injury or death.

Page 9

Table 2_Minimum Airflow for Reliable Electric Heater Operation (Cfm)

SIZE 50JZ024 50JZ030 50JZ036 50JZ042 50JZ048 50JZ060

AIR FLOW (CFM) 800 1000" 1200 1400 1600 2000

• The 030 size mOdels must be run on medium or high speed when used in conjunction with 15 kW electric heataccessory

INDOOR

I THERMOSTAT

FROM SOURCE

Fig. 10--Typical Installation

1" MIN.

_t 2" MIN.

DISCONNECT PER NEC*

*NEC - NATIONAL ELECTRICAL CODE

C00063

TRAP

OUTLET

C99013

Fig. 12_Condensate Trap

Duct Covers

Fig. 11--50JZ with Duct Covers On

C00092

Page 10

Failure to follow these precautions could result in damage to the unit being installed:

I. Make all electrical connections in accordance with NEC

ANSI/NFPA Ilatest edition) and local electrical codes governing such wirthg. In Canada, all electrical connec-

tions must be in accordance with CSA standard C22.1

Canadian Electrical Code P,'u-t I and applicable local codes. Refer to unit wiring diag,am.

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 pbases are balanced within 2 percent. Consult local power company for correction of improper voltage and/or phase imbalance.

4, Insulate low-voltage wires for highest voltage contained

within conduit when low-voltage control wires are in same conduit as high-voltage wires.

5. Do not damage internal components when drilling through any panel to mount electrical hardware, conduit, etc.

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 3 for electrical data}. The field-supplied disconnect may be mounted on the unit o_'er the

high-voltage inlet hole (See Figs. 2 and 3). If the unit has an electric heater, a second disconnect may be

required. Consult the lnstullation, Start-Up, and Service Instruc-

tions provided with the accessory for electrical service connec- tions.

Operation of unit on improper line voltage constitutes abuse and

may cause unit damage that could affect warranty.

ROUTING POWER LEADS fNTO 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 ISee Fig. 2 and 3 for location and size). When the leads are inside the unit. run leads up the high-voltage raceway to the line wiring splice box (See Fig. 13 through 15). For single-

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

wires (See Fig. 18).

CONNECTING GROUND LEAD TO GROUND LUG Refer to Fig. 18. Connect the ground lead to the chassis using the

ground lug in the wiring splice box. ROUTING CONTROL POWER WIRES (24-V)

Form a drip-loop with the thermostat leads before routing them intu the unit. Route the thermostat leads through grommeted, low-voltage hole provided in unit into unit control power splice box (See Fig. 2 and 3). Connect thermostat leads to unit control

power leads as shown in Fig. 17. The unit transformer supplies 24-v power for complete system

including accessory electrical heater. An automatic-reset circuit breaker (See Fig. 19) is provided in the 24-v circuit; see the caution label on the transformer or Fig. 20. Transformer is factory wired

lor 230-v operation. If supply voltage is 208-v, rewire transformer primary, as described in Special Procedures for 208-v Operation

section.

SPECIAL PROCEDURES FOR 208-V OPERATION

I. Be sure unit disconnect switch is open.

2. Disconnect the yellow primary lead /w 110) from the trans-

former. See unit wiring label 1See Fig, 13 and 141.

3. Connect the yellow primary lead (wl i0) to the transformer

terminal labeled 200-v.

Indoor blower-motor speeds may need to be changed for 208-v operation. Refer to indoor airflow and airflow adjustments section.

PRE-START-UP

r.', LV/_q 2WE_

Failure to observe the following warnings could result in serious personal injury or death:

1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system.

2. Do not operatecompressor or provide any electric power to

unit unless compressor terminal cover is in place and secured.

3. Do not remove compressor terminal cover until all electri- cal sources are disconnected.

4. Relieve and recover all refrigerant from both high- and low-pressure sides of 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 refrig- erant system is under pressure.

6. Do not use torch to remove any component. System contains oil and refrigerant under pressure. To remove a component, wear protective goggles and proceed as follows: a. Shut off electrical power to unit. 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 neces-

sary. 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 refrig- erant 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. Inspect coil fins. If damaged during shipping and handling,

carefully straighten fins with a fin comb.

4. Verify the following conditions:

Page 11

Table 3--Electrical Data--50JZ

UNIT 50JZ V-PH-HZ RANGE

SIZE FLA FLA

VOLTAGE COMPRESSOR ODFM I IDFM

Min Max RLA LRA

024 208/230-1-60 167 253 13.5 61.0 0.9 2.0

208/230-1-60 187 253 15.9 73.0 0.9 21

030

206/230-3.-450 187 253 10.9 63.0 0.9 2.1

208/230-1-50 187 253 16.9 83.0 1.6 4.1

036

208/230-3-50 187 253 12.2 77.0 1.6 4.1

460-3_o0 414 506 5.8 35.0 0.9 2.0

208/230--1-50 187 253 22.4 105.0 0.9 4.1

042 208/230--3_0 187 253 15.4 88.0 0.9 4.1

4_0 414 506 7.3 39.0 0.9 2,0

208/230-1-60 187 253 21.3 108.0 1.6 4.1

048 208/230-3-60 187 253 14.7 91.0 1.6 4.1

460-,-3-60 414 506 7.2 4,8.0 0.9 2.0

208/230-1-50 187 253 27.6 158.0 1.5 6.2

060 208/230-3-60 187 253 19.2 137,0 1.5 6.2

460_3-60 414 506 9.0 62.0 0.9 3.2

ELECTRIC HEAT S(NGLE POINT POWER SUPPLY

I Nominal kW" FLA UNIT MCA

J- -/- 19.6/19.8

3.8/5.0 18.1/20.8 42.3/45.8

MAX FUSEOR CKT BKR MOCP

30/30

50/50

7.5/10.0 36.1/41.7 64.9/71.9

-/- -/- 22.9/22.9

3.8/5.0 161/20.8 45.4/48.9

30/30 50/50

7.5/10.0 36 1141.7 68.0/75.0

11.3/15.0 54.2/625 90.6/101.0

-/- -/- 16.6/16.6

3.8/5.0 10.4/12 0 29.7/31.7

7.5/10.0 20.8/241 42,7/46.7

11.3/15.0 31.3/36.1 55.7/61.7

-/* -/- 26.8/26.8

3.8/5.0 18.1/20.8 49.4/52.9

20/20 35/35 45/50

60/

40/40

60/60

7.6/10.0 36.1/41.7 72.0/78.9

11.3/15.6 54.2/62.5 94,5/105.0 /- -/- 21.0/21 .O

3.8/5.0 10.4/12.0 34.0/36.0

7.5/10.0 20.8/24.1 47.6/51.0

11.3/15.0 31.3/36.1 60.0/66.1

-/- -/- 10.2

5.0 6.0 17.7

10.0 12.0 25.2

15.0 18.0 32.7

-/- -/- 33.0/33.0

3.8/5.0 19.1/20.8 5,6.6/59.0

30/30

40/40

50/60

20 30

40/40 60/60

7.5/10.0 36.1/41.7 78.1/85,1

11.3/15.0 54.2/62.6 100.7/111.1

15.0/20.0 72.2283.3 123,3/137.2

-/o -/- 24.6/24.3

3.8/5.0 10.4/12.0 37.3/39.3

7.5/10.0 20.8/24.1 50.3/54.3

11.3/15.0 31.3/36.1 63.3/69.4

30/30 50/50

60/60

15.0/20.0 41.6/48.0 76.2/84.2

-/- -/- 12.0

5.0 6.0 19,5

10.0 12.0 27.1

15.0 18.0 34.6

20.0 24.1 42.1

-/- -/- 32.3/32.3

3O 35

40/40

3.6/5.0 18.1/20.6 54.9/58.4

7.5/10.0 36.1/41.7 77.5/84.4

11.3/15.0 54.2/62.5 100.0/110.5

15.0/20.0 72.2/83.3 122,6/136.5

-/- -/- 24.1/24.1

3,8J5/8 10.4/12.0 37,1J39.1

7.5/10.0 20.8/24,1 50,1/54.1

30/30

45/50

60/60

11.3/15.0 31.3/36.1 63.2/69.2

15.0/20.0 41.6/48.0 76.0/84.0

-/- -/- 11.9

5.0 6.0 19.4

16.0 12.0 26.9

15.0 18.0 34.5

20.0 24,1 42.0

-/- -/- 42,2/42,2

15 25

50/50

3.8/5,0 18.1120.5 643/68.2

7,5/10.0 36.1/41.7 87.3/94.3

11.3/15.0 54.2/62.5 109.9/120.3

15.0/80.0 72.2/83,3 132,5/146.4

-/- -/- 31.7/31.7

3.8/5.0 10.4/12.0 44.7/46.7

40/40

50160

7.5/10.0 20.8/24.1 57.8/61.8

11.3/15.0 31.3/36.1 70.8/76.6

15.0/'20.0 41.6/48.0 83,7/91.7

-/- -/- 15.4

5.0 6.0 22.9

10.6 12.6 30.4

15.0 18.0 37.9

20.0 24.1 45.4

20 30

40 50

70/80

100/110

-/70

80/80

100/t10

70/70

90/90

1101125

125/150

70/70 80/90

110/125

126/150

70/70 80/90

80/80 100/110 110/125 150/150

70/70 80/80

90/100

Page 12

Ff?_l _F

I ,N , ,,

-_. ,,,iI_ [

_! tlFp _"_L HEAN E

S(IPeL HE_l

FIELD THERMO ;T_T

,[E tJC,l [ _ $

,'I=_¸ BpN

A_ [_SS/3F I ELECIRI R!LT

[

.RI :..... : w,-: _ _ 'al: 6

UNI[ ,_,IPON[N[ _ER_N,;IMLN[

I__:L_J

I:E3 isq

F;:3

_116 PP[_

J . _

LEGEND

T[RM_N_L_¥_[[II t :RIUII fHAK[R

Ihli I _ MNII_[ NI,

_, UI.I_ I_ Mql_

k_i rl I: h[ _{ [ I i ,, ig :iN: I

i I _1 _ FI, [ _.l_ II :IFI r r ii _INIll i

i r iiipM i_1 ir,LiMr ]H_ M_I,_ i_ i, , _4 1! 5N [r I

rl.i ILLM kLL_rir_ INII _11 N _N_ "F NIII¢ t, IN r.F i T ,HI4r _1

11[ I[ I i_ MINH]

%. i.............. _"'1 tL_ .............................

I IIMN[NT_I r ."]_IN .t,

_ N_TF I*l ! I_ H gN

i I P Hl_N _[F I' IIM VlI,_II r RID l[r.i I _ll

Fig. 13--Wiring Schematics

_N N_] il ,M_L i* DFT LI([I

/[_1 _{i ROST IWt_MO,T_T

C_152

Page 13

_l_i d_J ;'l b i ¸ !# . , u

: , :,MI¸ i _ _ ,

m ,j FUL ,_ IL_ - C)-II'C)

_Z_ _[T

• i _ q;

"i .'VvM

_- -_

_ Lr •

i _ ,, l.H_,

, i-,r

- CD-_CD

SCHEMATIC 208/230-3-60

IINI T MFr_NF!_I _fAF_[M[FI[

,MP

r I _

LEGEND

%:,. !,

r_rL .....

• _r

M_.r J, .

u_r

.,?,':'L .

Fig. 14--Wiring Schematics

DnJ

C00153

Page 14

AMF'

MltJlh_L kE I T

- 'C>'IO-O -_ - ° L. C_4_

-. C>IK:) - • -

.... _ lk " dkrj

- . _ _0 -_I _PN

SCHEMATIC 460-3-60

| | "=,

frEL_ _ _E _MC_ __

E( h _,_

' _,.....-I' 1

!'C'x

_ • 1 L "" I

G' _ - t_ pRN

..... - 7_ - , , "]

W_ WNT -- __ O I fgpN-

• b £ _ u. , 4 _/, @

W .11 _pN - -- . _ . __

-L _-- @

LEGEND

...................' " ' _ " ""°"..... -fl Fpfl'_'_I ....

..... _" " "r 'n't iJt e r_ rlent I q * Ih 'I H "_ / HI]/ ..t

,m,:. _r_' ,.... _2 " '_A_' " UU U U IuJU d WWU

_p _ _ i_ _ uJ U ILhH: III1LJ

,_ _ BRN

t'hn--

..--)

, ]L ] ,

..... ,_ ' 14

C_1_

FJg, 15---WJrJn 9 Schematics

Page 15

FLA -- Full Load Amps LRA -- Locked RotorAmps C US

MCA -- Minimum Circuit Amps MOCP -- Maximum Overcurrent Protection

RLA -- Rated Load Amps

*Heater capacity (K3N) based on heater voltage of 208v, 240v, & 480v.

If power distribution voltage to unit varies from rated heater voltage, heater KW will vary accordingly.

NOTES:

1. In compliance with NEC (National Electrical Code) requirements for multimotor and combination lead equipment (refer to NEC

Articles 430 and 440), the overcurrent protective device for the unit sha# be Power Supply fuse. The CG_ (CanaOfan Gas Association) units may be fuse or circuit breaker.

2. Minimum wire size is based on 60 C copper wire. If other than 60 C wire 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 _mbalance 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

LEGEND

average voltage

Fig. 16--Electrical Data Legend

EXAMPLE: Supply voltage is 460-3-60.

A B C AB = 452 v

AC = 455 v Average Voltage = 452 ÷ 464 ÷ 455

BC = 464 v

= 1371

= 457

Determine maximum deviation from average voltage.

(A8) 457 452=5v (BC) 464 457=7v

(AC) 457 455=2v

Maximum deviation is 7 v. Determir_ _ercent of v_ttage _'nbalance.

% Voltage Imbalance = 100 x 7

= 1.53%

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.

457

C99024

L._

@--

THERMOSTAT

AND SUBBASE

Fig. 17---Control Connections

SINGLE-PHASE CONNECTIONS

TO DISCONNECT

PER NEC

3-PHASE CONNECTIONS

LEGEND NEC - National Electrical Code

- - - Field Wiring Splice Connections

UNIT CONTROL POWER

G_R_Oq.MD__ =

LEAD I

L1 ~ _--- BLK--

[-2 ........ _'_ YEL-

L3 - - _-_BLU--

NOTE: Use copper wire only.

-_'_ BRN --

--_ ORN --

"J_-- RED --

SPLICE BOX

GROUND LUG

INSLPICE BO;_

C99056

24 V Circuit Breaker

24 Volt Compartment - J

099070

Fig. 19_Control Wiring Plate

TRANSFORMER CIRCU]T CONTAINS A MANUAL RESET OVERCURRENT PROTECTOR

IT WILL NOT AUTOMATJCALLY RESET

DISCONNECT POWER PRIOR TO

SERVICING

THIS COMPARTMENT MUST BE CLOSED

EXCEPT WHEN SERVICING

Fig. 18_lJne Power Connections

C99057

099058

Fig. 20---Transformer Label

Page 16

a. Make sure that outdoor-fan blade is correctly positioned in

fan orifice.

b. Make sure that air filter(s) is in place. c. Make sure that condensate drain pan and trap ,are filled with

water to ensure proper drainage.

d. Make sure that on the 060 size, only - the 2 wire ties

fastened to the outdoor coils and reversing

valve/accumulator have been remoxed.

e. Make sure that at] tools and miscellaneous loose parts have

been removed.

5. Compressors are internally spring mounted. Do not loosen or remove compressor hold-down bolts.

6. Each unit system has 2 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.

RILLE

I_'MAX BETVVEEN MOTORAND FAN HUB

MOTORSHAFT

C99009

Fig. 21--Fan Blade Clearance

START-UP

Using the Start-Up Checklist supplied at the end of this book,

proceed as follows:

Step 1--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 R_IOA refrigerant, using a volumetric- charging cylinder or accurate scale. Refer to unit rating plate for required charge.

Step 2--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 tunless accessory low-ambient kit is instailedL Do not rapid cycle the compressor. Allow 5 mth. between "on" cycles to prevent compressor damage.

CHECKING COOLING AND HEATING CONTROL OPERA- TION

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

I. Place room thermostat SYSTEM switch or MODE control in

OFT position. Observe that blower motor starts when FAN mode is placed in FAN ON position and shuts down within 60

sec 10304)60 size) or 30 sec (024 sizel 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 lemperature control is set to "call for Heating" (above room

temperature).

IMPORTANT: Three-phase. scroll compressors axe direction ori-

ented. Unit must be checked to ensure proper compressor 3-pha.se

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 dis- charge pressures may be dramatically lower than normal.

CHECKING AND ADJUSTING REFRIGERANT CHARGE The refrigerant system is fully charged with R-410A refrigerant

and is tested and factory sealed. hlOTE: Adjustment of the refrigerant charge is not required

unless the unit is suspected of not having the proper R_IOA 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 nameplate 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. If charge level is suspect in Heating mode, reclaim all refrigerant and charge to nameplate amount. (This information may be obtained from the physical data

table also.) IMPORTANT: When evaluating the refrigerant charge, an indi-

cated adjustment to the specified factory charge must always he

very minimal. If a substantial adjustment is indicated, an abnormal condition exists somewhere in the cooling system, such as insuf- ficient airflow across either coil or both coils.

REFRIGERANT CHARGE The amount of refrigerant charge is listed on the uait nameplate

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 evacu-

ating system, weigh in the specified amount of refrigerant (refer to system data plate).

LOW CHARGE COOLING Use Cooling Charging Charts (Figs. 25-30). 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 superheat 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 normal operating

range of the unit.

TO USE COOLING CHARGING CHARTS Take the outdoor ambient temperature and read the suction

pressure gauge. Refer to the chart to determine what the suction temperature should be.

Page 17

LEGEND

HPS - High Pressure Switch LCS - Loss of Charge Switch

:_ Accurater_ Metering Device

] Arrow indicates direction of flow

Fig. 22--Typical Heat Pump Operation, Heating Mode

OUTDOOR COIL

Metering

Position

_lJ

Bypass

pc_itlon

LCS

Mete(ing

INDOOR COIL

C00095

INDOOR COIL

Position

LEGEND HPS - High Pressure Switch

LCS - Loss of Charge Switch

___ Accurate¢' Metering Device

] Arrow indicates direction of flow

Fig. 23--Typical Heat Pump Operation, Cooling Mode

NOTE: If the problem causing the inaccurate readings is a

refrigerant leak. refer to Check for Refrigerant Leaks section. INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

Table 4 shows both heating and cooling airflows at various external static pressures. Refer to these tables to determine the

airflow for the system being installed. NOTE: Be sure that all supply-and return-air grilles are open, free

from obstructions, and adjusted properly. Airflow can be changed by changing the lead connection of the

blower motor.

LCS

Bypass Position

Unit 50JZ three-speed motors (except sizes 030 and 048) are

factory wired for low speed operation. Units 50JZ 030 and 048 are

factory wired for medium speed. For 208/230-v Motors:-- The motor leads are color-coded as

follows: 3-SPEED

Black = high speed Blue = medium speed

Red = low speed To change the speed of the blower motor (BM), remove the fan

motor speed leg lead from the blower relay IBRL This wire is attached to IGC terminal BM for single-phase and 3-phase units.

To change the speed, remove and replace with lead for desired blower motor speed. Insulate the removed lead to avoid contact

with chassis parts.

For 460-v GE Motors The motor leads are color coded as follows:

C00096

Page 18

Table 4--Wet Coil Air Delivery

Unit 50JZ 024-060 (Deduct 10 percent for 208-v)*

UNIT

024

030

036

042

048

06O

* Air delivery values are based onoperaf_ng voltage of 230-v or 460-v, wet coil, without filter or electric heater. Deduct l#ter and elect#t: heater pressure drop (see Tables

5 and 6) to obtain sta'6c pressure available for dueling.

NOTES:

1. DO not operate the unit at a cOOlingairflow that is less than 350 cfrn for each 12.000 Btuh of rated cooling capacity¸ Evaporator coil frosting may occur at ain3ows below

this point.

2. Dashes indicate portions oftable that are beyond the blower motor capacity or are not recommended.

3. Deduct 10 percent for 208-v.

MOTOR SPEED

Low

Med

High Cfm

Low

Med

High Cfm

Low

Med

High Cfm

Low

Med

High Cfm

Low

Med

High Cfm

Low

Med

High Cfm

Watts

Cfm

Watts

Cfm

Watts

watts

Cirri

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Cirn

Watts

Cfm

Watts

Cfm

Watts

Cfm

Watts

Clm

Watts

Cfm

Watts

0.0 0.1 0.2 0.3 275 273 271 270 923 844 754 669

276 276 272 963 929 781

375 377 371 362

1202 1170 1079 976

462 451 431 411

1374 1290 1205 1116

523 506 490 471

1500 1408 1301 1190

645 628 610

1474 1369 1267

660 639 524 611

1701 1659 1618 1576

620 600 586 574

1662 1621 1581 1540

763 747 729 709

1917 1868 1822 1774

597 592 578 526

2265 2190 2101 2033

754 730 707 687

2383 2282 2202 2134

901 876 856 838

2480 2383 2301 2233

EXTERNAL STATIC PRESSURE (iN. WG)

0.4 9.5 0.6 0.7 0.8 0.9 1.0

359 941

852

1982

353 350 347 341 876 814 737 622

447 439 431 423 968 869 765 659

354 350 884 807

469 449 435 428

1174 988 828 718

394 381

1020 916

449 426

1082 977

595 584 575

1169 1069 962

598 583 564 841 518 495 473

1531 1481 1425 1363 1293 1223 1154

704 675 645 614 582 550

1701 1631 1550 1460 1361 1256

806- 777 749 726

1708 1614 1521 1435

562 548 530 510 487

1496 1447 1392 1331 1263

686 661 634 606 577 547 517

1722 1662 1594 1515 1427 1330 1227

832 809 784 757 730 704 682

1914 1839 1757 1669 1577 1486 1402

460 452 445

1974 1869 1614

671 658 646 630 603 558 486

2070 2005 t935 1858 1771 1667 1576

813 785 755 723 696 681 687

2175 2122 2066 1998 1910 1788 1619

Table _FILTER PRESSURE DROP TABLE (In, wg)

FILTER SIZE CFM

20X2OX1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 -- -- 20 X 24 X 1 0,09 0.10 0.11 0.13 0.14 0.15 0.16

24X30X1 -- 0.07 0.08 0.11 0.12 0,13 0.1410.15 0.16 0.17 0.18

3-SPEED Black = high

Violet = jumper

Orange = medium

Red = low

To change the speed of the blower motor (BM), remove fan motor speed lead from the blower relay {BR_ and replace with the lead for the desired blower motor speed. The motor speed lead is

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 210012200 2300

0.09 ! 0.10

attached to terminal BM, For low and medium speeds, black must

be connected to the jumper wire. Insulate removed lead end to

avoid contact with chassis parts. To select high speed on 460-v GE

motors, separate the black female quick connect (QC) from the

jumper lead male quick connect (QC) and connecl the black lead

to the BR. Insulate the jumper to avoid contact with any chassis parts.

Page 19

--_ Table 6_ELECTRIC HEAT PRESSURE DROP TABLE Small Cabinet: 024-036CFM

500 600 700 800 900 1000 1100 1200 1300 1400

5 kW 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04

10 kW 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.00

15 kW 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 20 kW 0,00 0.00 0.02 0.04 0.06 0.08 0.09 O.11 0.13 0 15

ELECTRIC HEAT PRESSURE DROP TABLE

Large Cabinet: 042-060

CFM

11O0 1200 1300 1400 1800 1600 1700 1800 I gO0 2000 2100 2200 2300

5 kW

10 kW 15 kW

20 kW

0.0O 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10

0,00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.08 0.10 0.11

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

0.02 0,03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14

Balance Point Worksheet

Based on Indoor Entering Air of 70 F and Rated CFM

1500

0.06

0.10

0.16

0.17

24O0

0.11

0.12

0.14

0.15

1600

0.07

0.11

0.18

018

25O0

0.12

0.13

0.15

0.16

0 >,

_- 50

N 20

-10 0 10 17 20 30 40 47 50 Outdoor Air Temp (Deg F)

Fig. 24---50JZ Balance Point Worksheet

Step 3_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 swilch

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. Revers-

C00138

ing 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.

Page 20

(O24) 60 Hz COOLING CHARGING CHART

For use with units using R41Oa Retngerant

_tRE_ S

0_ 41I

:i ?4

55 18

55 13

15 ?

Fig. 25--Cooling Charging Chart, 50JZ 024 Units 82

(O361 60 Hz COOLING CHARGING CHART

For USe With UndS USu'_ R41Oa Refrigerant

1EMP

F C

'_ i / 22-2

i r

125 _2

115

IC6 4_

9_ _5

ia. 26---Coolina Charaina Chart. 50,,[Z 030UnCl_ 0083

(042) 60 HZ COOLING CHARGING CHART

For use with units using R410a Refrigerant

_T_E T_*_L_

3_0o0_

; C

125 :2

!_5 41

_5 29

"5 ;4

56 _3

_5 7

, L ..... _ _ ....... . .....

Fig. 27_Cooling Charging Chart, 50JZ 036 Units

DEFROST

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

field-selectable time period (DIP switch I 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 (J 1) must be shorted

by placing a flat bead screw driver in between for 5 sec and releasing, to observe a complete defrost cycle. When the Quiet

O084

55 _3

45 7

...... : .... ] ..... i ....

3O te _

COOO85

Fig. 28---Cooling Charging Chart, 50JZ 042 Units

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 posirion!. When Quiet Shift switch is

in ON position, the length of defrost is I minute (30 sec compre._or off period followed by 30 sec of defrost with com- pressor operation). On return to heating operation, compressor will

Page 21

(048) 60Hz COOLING CHARGING CHART

For use with units using R410a Refngerant

========================

i ! i ;!::LS_:i:?i?::

O_DO_

125 52

115 ,_

185 4

75 21

% I

(0_O) 60 HZ COOLING CHARGING CHART

For use with units using R41Oa Refngerant

Fig. 29--Cooling Charging Chart, 50JZ 048 Un_=°°86

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. 19). 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 (ap- proximately 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.

MAINTENANCE

To ensure continuing high performance, and to minimize 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 7. NOTE TO EQUIPMENT OWNER: Consult your local dealer

about the availability of a maintenance contract.

Fig. 30--Cooling Charging Chart, 50JZ 060 Un_i°°_7

I'_ 1}_'!:.I;] ,'117[_

The ability to properly perform maintenance on this equip-

ment 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 th,'m those

procedures recommended in the User's Manual FAILURE TO HEED THIS WARNING COULD RESULT IN SERI-

OUS INJURY OR DEATH AND POSSIBLE DAMAGE TO

THIS EQUIPMENT.

could result in serious injury

or death:

I. Turn off electrlcal power to the unit before performing any

maintenance or service on this unit.

2. Use extreme caution when removing panels and parts. As with any mechanical equipment, personal injury can result from sharp edges.

3. Never place anything combustible either on. or in contact with, the unit.

The minimum maintenance requirements for this equipment are as follows:

I. Inspect air filterls) each month. Clean or replace when

necessary.

2. Inspect indoor coil. drain pan, and condensate drain each cooling se_.son for cleanliness. Clean when necessary.

3. Inspect blower motor and wheel for cleanliness each cooling

season. Clean when necessary.

Page 22

--CS3-- --CSY--

Fig. 31--Defrost Control

4. Check electrical connections for tighmess and controls for

proper operation each cooling season. Service when neces- sal'y.

Step 1--Air Filter IMPORTANT: Never operate the unit without a suitable air filter

in the return-air duct system. Always replace the filter with the same dimensional size and type as originally installed. See Table

1 for recommended filter sizes.

Inspect air fiherls) at le:t_t 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 prelubricated. 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.

A99442

Step 3--Outdoor Coil, 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 sea.son. Remove all obstructions, including weeds and shrubs, that interfere with the airflow through the condenser coil.

Straighten bent fins with a fin comb. If coated with dirt or lint,

clean the coils with a vacuum cleaner, using the soft brush attachment. Be careful not to bend the fins. If coated with oil or

grease, clean the coils with a mild detergent-and-water solution. Rinse coils with clear water, using a garden 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

b_.se.

Inspect the drain pan and condensate drain line when inspecting the coils. Clean the drain pan and condensate drain by removing all foreign matter from the pan. Flush the pan and drain trough with

Page 23

clear water. Do not splash water on the insulation, motor, wiring, or air filter(sl. If the drain trough is restricted, clear it with a

"plumbers snake" or similar probe device.

Step 4.--Outdoor Fan

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 sctscrew 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. 21 ).

6. Ensure that setscrew engages the flat area on the motor shaft

when tightening.

7. Replace grille.

Step 5_Electrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be .ruJ_ 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 connecrous are

noticed, disassemble the connection, clean all the parts, restrip 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 instrumenta- tion. Refer to the unit wiring label when making these checkouts.

Step 6_Refrigerant Circuit

Inspect all refrigerant tubing connections and the unit base for oil accumulation annually. Detecting oil generally indicates a refrig-

erant 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, lfa problem exists, be

sure that all supply- and return-air grilles are open and free from obstructions, and that the alr f!lter is clean. When necessary, refer

to Indoor Airflow and Airflow Adjustments section to check the system airflow.

Step 8_Metering Deviees-Accurater Piston

This metering device is a fixed orifice and is contained in the brass hex-body in t/_ liquid line feeding the indoor and outdoor coils.

Step 9---Pressure Switches

Pressure switches are protective devices wired into cooWol circuit

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

C99097

Fig. 32--Refrigerant Circuit

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 he used as replacements for the Puron (R410A) system.

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 airflow across indoor coil, dirty filters, etc. It opens on a pressure

drop at about 20 psig. If system pressure is above this, switch

should be closed. 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.

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.

Step 11_igh-Pressure Switch

The high-pressure switch is located in the discharge /ine and protects against excessive condenser coil pressure. It opens at 610 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--Copelanfl Scroll Compressor (Puron Refriger- ant)

The compressor used in this product is specifically designed to

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

changed.

Page 24

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

Exercise extreme caution when working near compressors. Power should be shut off. if possible, for most troubleshooting tech

niques. Refrigerants present additional safety hazards.

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 i._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 50JZ. including the compressor oil needed, servicing systems on roofs containing

synthetic materials, the filter drier and refrigerant charging.

REFRIGERANT

¥_ [g_ArilL,]L

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. Gauge set. hoses, and recovery system must be designed to handle Puron. If you are unsure consult the equipment manufacturer. Failure to use Puron compatible servicing equipment or replacement components may result in property damage or injury.

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 MA- TERIALS

POE (polyolester) compressor lubricants are known to cause long

term damage to some synthetic roofing materials. Exposure. even if immediately cleaned up, may cause embrittle

ment (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 precantion._ to protect roofing. Proce-

dures which risk oil leakage include, but are not limited to, compressor replacement, repairing refrigerant leaks, replacing

refrigerant components such as filter drier, pressure switch, me- tering device, coil, accumulator, or reversing valve.

Synthetic Roof Precautionary Procedure

I. Cover extended roof working area with an impermeable

polyethylene (plasticl drip cloth or tarp. Cover an approximate

10 x 10 ft. area.

2. Cover 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 immediately under component(s! to be serviced and prevent lubricant run-offs

through the louvered openings in the base pan.

4. Perlorm required service.

5. Remove and dispose of any oil contaminated material per

local codes.

LIQUID LINE FILTER DRIER The biflow filler 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 remoxing 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 refrig- erant to flow from cylinder in upright position. For cylinders

equipped with a dip tube, charge Puron units with cylinder in

upright position and a commercial metering device in manifold

hose. Charge refrigerant into suction-line.

Step 14--System Information

TIME-DELAY RELAY The Time-Delay Relay (TDR) is a solid-state control, recycle

delay timer which keeps indoor blower operating for 60 sec on 030-060 sizes or 30 sec on 024 size after thermostat is satisfied.

This delay enables blower to remove residual cooling in coil after compression shutdown, thereby improving efficiency of system. The sequence of operation is that on closure of wall thermostat and at end of a fixed on delay of I sec, fan relay is energized. When thermostat is satisfied, an off delay is initiated. When fixed delay of 60 -+5 sec or 30 -+ 5 sec is completed, fan relay is de-energized and fan motor stops. If wall thermostat closes during this delay, "/'DR is reset and fan relay remains energized. TDR is a 24v device that operates within a range of 15v to 30v and draws about 0.5 amps. If the blower runs continuously instead of cycling off when

the fan switch is set on AUTO, the TDR is probably defective and must be replaced.

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 prexsure gauges read 0 psi. Never open system

without breaking vacuum with dry nitrogen.

CHECK DEFROST THERMOSTAT There is a liquid header with a brans distributor and feeder tube

going into outdoor coil. At the end of 1 of the feeder tubes, there is a 3/8-in. OD stub tube approximately 3 in. long (See Fig. 33L

The defrost thermostat should be located on stub tube. Note that

there is only 1 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

Page 25

_FEEDERTUBE

3TUBE

DEFROST

THERMOSTAT

Fig. 33--Defrost Thermostat

NOTE: The defrost thermostat must be located on the liquid side

of the outdoor coil on the bottom circuit and as close to the coil as

possible•

TROUBLESHOOTING

Refer to the Cooling and Heating Troubleshooting Chart (See Table 7.) lor troubleshooting information.

START-UP CHECKLIST

Use the Start-Up checklist to ensure proper start up procedures ,are followed.

C99029

is a thermally actuated switch clamped to outdoor coil to sense its temperature. Normal temperature range Is closed at _ 0 -+ 3 F and

open at 80 ° -+ 5°F.

• _ o o

Page 26

HEAT PUMP WITH PURON---QUICK REFERENCE GUIDE

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

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

• Puron refrigerant cylthders manufactured pdor 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 sewice 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 manifoJd 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 holy compafibre with POE oils.

• Vacuum pumps wilt 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-ILne 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 valvec with wet cloth when brazing.

• A Puron liquid-line filter dner is requi_ed 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 a_ warnings, cautions, and bo/d text.

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

Page 27

SYMPTOM

Compressor andoutdoor fan

will not start

Compressor will not start but condenser fan

fulls

Three-phase scroll compressor (size 030-

060 units) may be a low pressure differential

Compressor cycles (other than normally satisfying thermostat)

Compressor operates continuously

Excess_ehead pressure

(Continued ne_ page)

Table 7--Troubleshooting Chart

CAUSE

Power Failure Fuse ffiown or circuit breaker tnpped

Defective thermostat, contacfor, transformer, control relay, defrost board, or high pressure or loss-

of-charge/low pressure switch thsuffic_ent line voffage Incorrect or faulty wiring

Thermostat setting too high

Units have a 5-minute time delay

Faulty wiring or loose connections in compressor

cttcuff Compressor motor burned out, seized, or

internal ovedoad 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 voitege

Blocked outdoor coil Defective run/start capacitor, overload or start

relay Defective thermostat

Faulty outdoor-fan motor or capacitor Damaged reversing valve

Restriction in refrigerant system Dirty air filter

U_t uncJersized for load Thermostat set too low Low refrigerant charge

Frosted coil with incorrect defrost operation

Air in system

Outdoor coil dirty or restricted Dirty air tilter

Dirty indoor or outdoor coil

Refrigerant overcharged

Air itt system

(Heat) Indoor air restricted or re_rcniatit_g

Indoor or outdoor air restdcted or air short-cycling

REMEDY

Call power company

Replace fuse or reset circuit breaker

Replace component

Determine cause and correct

Check widng diagram and rewire correctly

Lower thermostat setting below room temperature

CO NO]- bypass this compressor time

detey-wait for 5 minutes until time-delay

relay is deenergized

Check winng 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 refdgerant, evacuate system, and

recharge to capacities shown on nameplate Replace and determine cause

Determine cause and correct Determine cause and correct

Determine cause and replace Replace thermostat

Replace Determine cause and correct

Locate restriction and remove Replace filter

Decrease _oad or it_crease unit size

Reset thermostat Locate leak, repair, and recharge

Check defrost time settings Reset as necessary Check defrost temperature switch Replace as necessary

Recover refdgerant, evacuate system,

and recharge Clean coil or remove restriction

Replace filter Clean coil

Recover excess refrigerant Recover refrigerant, evacuate system,

and recharge Determine cause and correct

i Determine cause and correct

Page 28

Table 7--Troubleshooting Chart (Cont'd)

SYMPTOM

Head pressure too low

Excessive suction pressure

Su_ion pressure too low

Compressor runs but outdoor fan does not

IFM does not run

IFM operation is intermittent

IFM-Indoor Fan Motor

CAUSE

LOW retngeran( charge

Restriction in liquid tube

(Heat) OutdoOr coil frosted

(Cool) High Heat load Reversing valve hung up or leaking internally

Refhgerant overcharged

(Cool) Dirty air filter

(Heat) Outdoor coil frosted

LOW refdgerard charge Metehng device or tow side restricted

(Cool) Insufficient coil airflow

(Cool) Temperature too low in conditioned area

(Cool) Outdoor ambient below 40°F Filter-dder restricted

NC (normally oiosed) contacts on defrost board open Blower wheel not secured te shaft

Insufficient voltage at motor Power connectors not propedy seaJed

Water dripping into motor

Connectors not firmly sealed

REMEDY

Check for leaks, repair and recharge

Remove rest dction Move timer on con('r_ boar_ to 30 mirlutet;

between defrost cycles Check for source and eliminate

Replace valve

Recover exce_s refrigerant

Replace filter Move timer on control board to 30 minutes

between defrost cycles

Check for leaks, repair and recharge Remove source ol restdctior_

Increase air quantity Check filter-replace if necessary

Reset thermostat

Instell low-ambient kit Replace Check con_tlon of relay on beard

Replace it necessary Prc_pedy tighten b_ower whee_ to shaft

Determine cause and Correct Connectors shouJd s_ap eastiy: do not force

Vedfy proper ddp loops in connector wires Gently puti wires individually to be sure they are

crimped into the housing

Page 29

START-UP CHECKLIST

(REMOVE AND STORE IN JOB FILE)

I. PRELIMINARY INFORMATION

Model No .............................................................................................................................................................

Sedal No ..............................................................................................................................................................

Date .....................................................................................................................................................................

Technician ...........................................................................................................................................................

fl, PRE-START-UP

__ Vedfy that all packing materials have been removed from unit __ Remove all shipping holddown bolts and brackets per installation instructions

-- Make sure that - on the 060 size, only - the two wire ties fastened to the outdoor coils and reversing valvefaccumulator have been removed

__ Verify that condensate connection is installed per installation instructions __ Check all electrical connections and terminals for tightness __ Check that indoor (evaporator) air filter is clean and in place __ Vedfy that unit insfalla_fon is level

__ Check fan wheel propeller for location in housing and setscrew tightness

gl. START-UP

Supply Voltage: L1-L2 L?.-L3 L3-L1 Compressor Amps: Lf _ L2 __ L3

Indoor Fan Amps:

AIR TEMPERATURE

Outdoor-Air Temperature: DB

Return-Air Temperature: DB WS Heat Pump Supply Air: __

Electdc Heater Supply Air:

REFRIGERANT PRESSURES AND TEMPERATURES

Refrigerant Suction psig Refrigerant Discharge psig

Suction Line Temp* Discharge Line Tempt Liquid Line Temp:_ __ Verify Refrigerant charge using charging tables

__ Vedfy that 3-phase scroll compressor is rotating io correct direction.

• Measured at suction inlet to compressor t Measured at diSCha[ge oUtlet from compressor.

:_ Measured at liquid line leaving co,ldenser

Page 30

Page 31

Page 32

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and whhout incurring obligations.

PC 101 Catalog NO. 535-00020 Printed in U.S.A. Form 50JZ-2SI Pg 32 12_00 Replaces: 5OJZ-1SI