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

...

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

_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)

• = . , ,,

.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

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

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

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

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.

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.

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

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

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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:

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