Carrier 50XP024300, 50XP036300, 50XP048300, 50XP060300 Installation Guide

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Page 1

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation.

NOTE: Installer: Make sure the Owner's Manual and Service Instructions are left with the unit after installation.

TABLE OF CONTENTS

PAGE

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

RECEIVING AND INSTALLATION ................. 2-13

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

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

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

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

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

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

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

Field Fabricate Ductwork ............................ 2

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

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

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

Installation ...................................... 7

Connect Condensate Drain ........................... 8

Install Duct Connections ............................. 9

Configuring Units for Downflow (Vertical) Discharge .... 9

Install Electrical Connections ........................ 10

High-Voltage Connections ........................ 10

Special Procedures for 208-v Operation .............. 11

Control Voltage Connections ....................... 11

Easy Select _ - 50XP ............................ 11

Standard Connection ............................. 13

Transformer Protection ........................... 13

PRE-START-UP ................................... 13

START-UP ..................................... 16-17

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

Start-Up Cooling Section and Make Adjustments ........ 16

50XP Start-Up ................................... 16

Checking and Adjusting Refrigerant Charge ........... 16

Indoor Airflow and Airflow Adjustments ............. 17

50XP Sequence Of Operation ...................... 17

MAINTENANCE ................................ 19-22

Air Filter ........................................ 20

Evaporator Blower and Motor ........................ 20

Condenser Coil, Evaporator Coil, and Condensate

Drain Pan ....................................... 20

Condenser Fan ................................... 21

Electrical Controls and Wiring ....................... 21

Refrigerant Circuit ................................. 21

Evaporator Airflow ................................ 21

Metering Devices-TXV & AccuRater cR)Piston ........... 21

Pressure Switches ................................. 21

Loss-of-Charge/Low-Pressure (Air Conditioner Only) .... 21

High-Pressure Switches ............................ 21

Copeland Scroll Compressor (Puron cR)Refrigerant) ........ 21

Refrigerant ...................................... 22

Turn to the Expertg

C99064

Fig. 1 - Model 50XP

Compressor Oil ................................... 22

Servicing Systems on Roofs with Synthetic Materials ...... 22

Liquid-Line Filter Drier ............................ 22

Puron (R-410A) Refrigerant Charging ................. 22

TROUBLESHOOTING .............................. 22

START-UP CHECKLIST ............................ 22

SAFETY CONSIDERATIONS

Improper installation adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified

installer or agency must use factory-authorized kits or accessories when modifying this product Refer to the individual instructions

packaged with the kits or accessories when installing. Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.

Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes, the current editions of the National Electrical Code (NEC) NFPA 70.

In Canada refer to the current editions of the Canadian electrical

Code CSA C22.1.

Recognize safety information. This is the safety-alert symbol Z_. When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand these signal words; DANGER, WARNING, and CAUTION. These

words are used with the safety-alert symbol. DANGER identifies

Page 2

the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and

property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

The power supply (volts, phase, and hertz) must correspond to that specified on unit rating plate.

INTRODUCTION

The 50XP units are fully self-contained, and designed for outdoor installation (see Fig. 1). See Fig. 2 and 3 for unit dimensions. All

unit sizes have discharge openings for both horizontal and down- flow configurations, and are factory shipped with all duct openings

covered. (]nits may be installed either on a rooftop, ground-level cement slab, or directly on the ground if local codes permit. See

Fig. 4 for roof curb dimensions.

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before installing or servicing system, always turn off main power to system. There may be more than one disconnect

switch. Turn off accessory heater power switch if

applicable,

UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could result in personal iniury or

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

standard R-22 systems. DO NOT use R-22 service equipment or components on Puron (R-410A) equipment. Ensure service equipment is rated for Puron (R-410A).

IMPORTANT: The gasketing of the unit to the roof curb is critical for a water tight seal. Install gasketing material supplied with the roof curb. Improperly applied gasketing also can result in

air leaks and poor unit performance. Curb should be level to within 1/4 in. (6 mm) (see Fig. 8). This is

necessary for unit drain to flmction properly. Refer to accessory roof curb installation instructions for additional information as

required.

SLAB MOUNT

Place the unit on a solid, level concrete pad that is a minimum of 4 in. (102 mm) thick, with 2 in. (51 mm) above grade. The slab

should extend approximately 2 in. (51 mm) beyond the casing on

all 4 sides of the unit. Do not secure the unit to the slab except

when required by local codes.

GROUND LEVEL

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 -- Field Fabricate Ductwork

Secure all ducts to roof curb and building structure on vertical

discharge units. Do not connect ductwork to unit. For horizontal

applications, unit is provided with flanges on the horizontal

openings. All ductwork should be secured to the flanges. Insulate

and weatherproof all external ductwork, joints, and roof openings

with counter flashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be insulated

and covered with a vapor barrier. If a plenum return is used on a

vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes. A minimum clearance is not

required around ductwork. Cabinet return-air static shall not exceed -.25 in. wc.

Step 4 -- Provide Clearances

The required minimum operating and service clearances are shown in Fig. 2 and 3. Adequate ventilation and condenser air must be

)rovided.

RECEIVING AND INSTALLATION

Step 1 -- Check Equipment

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

informative plate. Check this information against shipping papers. INSPECT SHIPMENT

Inspect for shipping damage while unit is still on shipping pallet. If unit appears to be damaged or is torn loose from its anchorage,

have it examined by transportation inspectors before removal. Forward claim papers directly to transportation company.

Manufacturer is not responsible for any damage incurred in transit. Check all items against shipping list. Immediately notify the

nearest equipment distribution office if any item is missing. To prevent loss or damage, leave all parts in original packages until

installation.

Step 2 -- Provide Unit Support

For hurricane tie downs, contact distributor for details and PE (Professional Engineering) Certificate, if required. ROOF CURB

Install accessory roof curb in accordance with instructions shipped with curb (see Fig. 4). Install insulation, cant strips, roofing, and

flashing. Ductwork must be attached to curb.

[]NIT HAZARD

Failure to follow this caution could result in equipment damage.

Do not restrict condenser airflow. An air restriction at either the outdoor-air inlet or the fan discharge can be detrimental

to compressor life.

The condenser fan draws air through the condenser coil and discharges it through the top fan grill. Be sure that the fan

discharge does not recirculate to the condenser coil. Do not locate the unit in either a corner or under an overhead obstruction. The

minimum clearance under a partial overhang (such as a normal house overhang) is 36-in. (914 mm) above the unit top. The maximum horizontal extension of a partial overhang must not

exceed 48 in. (1219 mm). 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, tile, or other combustible materials.

Page 3

UNIT

50XPO24 5OXPOBO BDXPOBE

705

[R78]

INOO011

OUTDOORCOIL

i m

CORNER WEIGHT LBSIHO

"I' "2" "3 .... 4"

024 62/28 49/22 7a/34 123156

030 62128 50/23 75134 125157

OSH 66/30 53124 79/3H 132/60

ELECTRICAL

CHARACTERISTICS

208-230-I-60, 2081230-3-60 208-230-:-60, 2081230-3-H0

208-R30-i-HO, 2081230-3-60

UNIT WT UNIT HEIGHT CENTER OF GRAVITY MMIIN

LBS HG 'AT' Y Z

308 i40 i091714298: 44761176] 45721180] 312 I42 :142514498: 495B[19B] 44761176] 4572[:80] 330 i50 :193314698: 533412101 5OBO[2OO] 4420[:761

REQIJIPN_:)CLEARANCES TO _'BBLE MAR-

TOP OF UNIT ............................................. 3556 [1400]

DUCT SIDE OF UNIT ......................................... 508 [HO0]

SIDE OPPOSITE DUCTS ............................. 3556 [1400]

BOTTOM OF UNIT ........................ O 0 [0001

ELECTRIC HEAT PANEL .................................... 9144 [3600]

N_C. I_.I_QIJII_ Cl.EARANCE&

BETWEEN UNITS, POWER ENTRY SIDE ....................... 10668 [4ROO]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .......... 9140 [3600]

UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWERENTRY SIDE .......... 1066 8 [4200]

REO_JlREDCL,.E&RANOE FOR O_A"IIOI_ AND S_VlCll&3

EVAP COIL ACCESS SIDE ................... 9140 [H6 OH]

POWER ENTRY SIDE ..................................... 9140 13600]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP ................................................ 12192 [48H0]

SIDE OPPOSITE DUCTS ........................... 9140 [36 00]

DUCT PANEL ............................. 3048 [1200]_

_MINIMUM DISTANCES:IF UNIT IS PLACED LESS THAN 3048 [iHO0] FROM WALL

SYSTEM,THEN SYSTEM PERFORMANCEMAYBE COMPROMISED

DIMENSIONS IN [] AHE IN INCHES

MILLIMETERS [IN]

TOP ViEW

1985

[3 441

FIELD ENTRY--

SERVICE PORTS

[oG_I

11939

[4700]

.=.

, FULL LOUVER

............]i

LEFT SiDE VIEW

T T

[32 7R]

_724

570 3 ERR 45]

L42 7

[ 6B]

[2 85]

" _ " 22R[O_T_E_ _

L 81 :

COMPRESSOR, BLOWER, ELECTRIC HEAT & ELECTRICAL ACCESS PANEL

12265

[48281

[3:43]

FRONT ViEW

FULL LOUVER

5505

[H1.67]

L POiER E_IT_Y [ : ]

222

[481]

L ...................... IL

SUPPLY DUCT • OPENING

[983]

RIGHT SiDE VIEW REAR ViEW

50XPHO0017

[983]

Page 4

UNIT

15391 11349]

3558 #_--114D13558 1

[1Aoll /l

! UETURNJ _W"/sUPRLY/ I_

I 'IIII OPTIONAL I I OPTIONAL

704 [B771 4066 IIII RETURN I I SUPPLY

[1601] AIR I AIR

INDOOR COIL

OPENING I OPENING

IIII

llll

IIII

50XPO42 50XPO48 5OXPOBO

CORNER WEIGHT LBS/HG

"1' "2" "3 .... 4"

042 78135 62128 93/42 155170

048 84138 68/31 101146 109177

060 93/42 75134 112/51 187/85

CHARACTERISTICS G

ELECTRICAL J UL35iBIT _

208-230-1-0%2081230-3-60 176 208-230-1-60, 2081230%%0 422 I 192

BEQ_JI_ CI,,,_AR/84CES TO _S'I'U.I_ MAR,..

TOD OF UNIT ............................................. 3550 [i400]

DUCT SIDE OF UNIT ......................................... 508 [200]

SIDE OPPOSITE DUCTS ......................... 3556 [1400]

BOTTOM OF UNIT ........................... O O [OOO]

ELECTRIC HEAT PANEL ................................... 9144 [3600]

NEC. REQIJIR_:)CLEARANCE&

BETWEEN UNITS, POWER ENTRY SIDE ........................ 10068 [4200]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .......... 9140 [3600]

UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, ROWERENTRY SIDE ............. 1066 8 142 001

RE(_JIRIB) CI..EARANCE FOR OPiE_A'BOI_ AND SB_VlClr_3

EVAP COIL ACCESS SIDE .................... 914 0 [3600]

POWER ENTRY SIDE ........................................ 9140 [3600]

(EXCPT FOR NEC REQUIREMENTS)

UNIT TOP................................................ 12192 [4800]

SIDE OPPOSITE DUCTS ................. 9140 [36 DO]

DUET PANEL ............................................. 5048 [1200D

_MINIMUM DISTANCES:IF UNIT IS PLACED LESS THAN 3048 [1200] FROM WALL

/ t 1i1

OUTDOOR COIL _/

UNIT HEIGHT CENTER OF GRAVITY MM/IN

1091714298] 49531195] 4476[176] 45721180] 1142514498] 49551195] 44761i761 45721180]

I208-230-1-60, 208/230-3-60 467 22

"AI' 533412i0] 50801200] Z

1!93314098] 44201176]

SYSTEM,THEN SYSTEM PERFORMANCE MAYBE COMPROMISED

DIMENSIONS IN [] ARE IN INCHES

MILLIMETERS [IN]

MILLIMETERS [[N]

TOP VIEW

.=.

10906 [42941

SERVICE PORTS

•__ i¸

L,' I'I , 2_

4% J /]

I,/o,:!;_;s!_T=L_32_

x 220 [088] DP [12 95]

11231 [44 221

LEFT SIDE VIEW

FIELD ENTRY--

620 2 [24 42]

_722

F 11959

[4700]

]

JI.::Ta

[284]

COMPRESSOR, BLOWER, ELECTRIC HEAT _

& ELECTRICAL ACCESS PANEL

12263 [4828]

FRONT VIEW

75] DIA HO

445 [I POWER ENTRY_

_ 326_ _

809 [342]

1220 [481]

FULL LOUVER

[0881DIA HOLE

CONTROL ENTRY

RIGHTSIDE VIEW

402 0

[1583]

1177

[465]

SUPPLY RETURN DUCT DUCT

OPENING OPENING

_872 3475

351 2

[13 83] [ 383]

REAR VIEW

I 50XP500018

Page 5

ase

/ Screw -___

/ (NOTE A) -_

/ *Gasketina_ _

[/ ou_a?_le_;g_g _ _]1 ..............................

1_ Wood nailer*\

[ Flashing field Ill_l II \

I supplied _ _Jll_il_ R°°fcurb* I

ll_iiiill_ Insulation(field

I Roofing mate_al tl_!i_ II supphed) /

/ base

/ ,,,scrtw_

/ ,.(NOTE A) -_H

/ *Gask_tin"g .._, _

Woodnai,er*

I Flashing field Ill'Ill

I supplied _ JIl_l _ Roofcurb*

l Roofing mate_al supplied)

tl_su_ation (f!e_d

/l_:iill II _auctwork [

\ II ,ie,dsupp,ed/

Roof Curb for Small Cabinet

Note A:When unit mounting screw is used

retainer bracket must also be used.

Supply opening

(Bx c)

\ o_1111 f'_d supplied /

]I_!_IP -- Ductw°rk t

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

Long

Suppo_

Retu'n opening

(Bx c)

50XP UNIT SIZE

024-036

ROOF CURB

042-060

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. Roof curb is made of 1d-gauge steel.

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

5. Insulated panels: 1-in. (25mm) thick fiberglass 1 lb. (.45 kg) density.

ODS CATALOG NUMBER

CPRFCURB006A00 CPRFCURB007A00

CPRFCURB008A00 CPRFCURB009A00

Support

Fig. 4 - Roof Curb Dimensions

Insulated Gasket around deck pan outer edge.

IN, (MM)

8 (203)

14 (356)

8 (203)

14 (356)

IN. (MM)

11 (279) 11 (279)

16-3/16 (411) 16-3/16 (411)

IN. (MM) 16-1/2 (419) 16-1/2 (419)

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

C00076

IN, (MM)

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

40-1/4 (1022) 40-1/4 (1022)

Page 6

Unit* 024 024 030 030

Ib kg Ib kg

Rigging 319 145 323 147 Weight

NOTE: See dimensional drawing for corner weights

SMALL CABINET

036 036 042 042 048 048

Ib kg Ib kg Ib kg

341 155 Rigging 399 181 433 196

Unit*

Weight

Fig. 5 - Rigging Weights

•/,1 w/IONAL, ---_----- SUPPLY !111

t RETURN

IIIII AIR i1111!OPENING//)__ i \_ .._ AIR Illl'

((Ill /' l(i\ _ ( __ j(II

UII! II [1!1

J,.lllll l'If(l,_ @ _ l fillllll

OPENING !! II

II II

,,,,, ,,.., /,// II',',

LARGE CABINET

060

478

060

217

2" (51 mm

___=__= ,//

EVAP. COIL COND. COIL

Fig. 6 - Slab Mounting Details

Step 5 -- 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.)

Follow all applicable safety codes. Wear safety shoes and work gloves.

UNIT FALLING HAZARD Failure to follow this warning could result in personal

iniury, death or property damage. When installing the unit on a rooftop, be sure the roof will

support the additional weight.

Never stand beneath rigged units or lift over people.

Only trained, qualified crane operators and ground support staff should handle and install this equipment.

When working with this equipment, observe precautions in the literature, on tags, stickers, and labels attached to the equipment,

and any other safety precautions that might apply.

A08465

INSPECTION

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

and straps should be visually inspected for any damage, evidence of wear, structural deformation, or cracks. Particular attention should be paid to excessive wear at hoist hooking points and load

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

areas must not be used and should be discarded.

DUCTS

y 5527")

SEAL STRIP MUST BE IN

PLACE BEFORE PLACING

PLACE _" (48.28")

BASEPAN SLOT (BELOW HANDHOLDS) BEFORE RIGGING

UNIT ON ROOF CURB

C99015

Fig. 7 - Suggested Rigging

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal iniury/death or property damage.

Rigging brackets for one unit use only. When removing a unit at the end of its useful life, use a new set of brackets.

Never exceed 200 lb. (91 kg) per bracket lifting force.

ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal

iniury or death. Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect switch. Turn off accessory heater power switch if applicable. Tag disconnect switch with a suitable warning

label.

Page 7

MAXIMUM ALLOWABLE

DIFFERENCE in. (mm)

A-B

1/4 (6.35)

Fig. 8 - Unit Leveling Tolerances

B-C ArC

1/4 (6.35) 1/4 (6.35)

INSTALLATION

6. Remove unit from shipping carton. Leave top shipping skid on the unit as a spreader bar to prevent the rigging

straps fromdamaging the unit. If the wood skid is not available, use a spreader bar of sufficient length to protect

unit from damage.

7. Position the lifting bracket assembly around the base of the unit. Be sure the strap does not twist.

8. Place each of the 4 metal lifting brackets into the rigging holds in the composite unit base.

9. Thread lifting bracket strapping around bottom perimeter of unit as follows:

a. Open lever of tension buckle (ratchet type).

b. Feed strapping through tension buckle (See Fig. 9).

A07925

DETAIL A

UNIT HEIGHT

SEE DETAIL A/

A08005

Fig. 10 - Lifting Point

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

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal iniury/death or property damage.

Rigging bracket MUST be under the rain lip to provide adequate lifting.

FEED _

C99067

Fig. 9 - Belt Threading

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.

10. Tighten the tension buckle until it is taut. Lifting brackets must be secure in the rigging holds.

11. Attach field-supplied clevis or hook of sufficient strength to hole in the lifting bracket (See Fig. 10).

12. 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. 10).

13. Position lifting point directly over the unit's center of gravity.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal iniury/death or property damage.

Do not strip screws when re-securing the unit. If a screw is stripped, replace the stripped one with a larger diameter screw (included).

UNIT FALLING HAZARD Failure to follow this warning could result in personal

injury/death or property damage. When straps are taut, the clevis should be a minimum of 36

in. (914 mm) above the unit top cover.

Page 8

Table 1 - Physical Data - Unit 50XP

UNIT SIZE NOMINAL CAPACITY (ton)

SHIPPING WEIGHT (Ib) SHIPPING WEIGHT (kg)

COMPRESSORS

Quantity

REFRIGERANT (R-410A)

Quantity (lb.) Quantity (kg)

REFRIGERANT METERING DEVICE

OUTDOOR COIL

Rows...Fins/in,

Face Area (sq ft)

OUTDOOR FAN

Nominal Cfm Diameter (in.)

Diameter (mm)

Motor Hp (Rpm)

INDOOR COIL

Rows...Fins/in,

Face Area (sq ft)

INDOOR BLOWER

Nominal Cooling Airflow (Cfm) 800 1000 1100 1400 1400 1750

Size (in.) 10x10 10x10 1lx10 1lx10 1lx10 1lx10 Size (mm.) 254x254 254x254 279.4x254 279.4x254 279.4x254 279.4x254

Motor HP (RPM) 1/2 (1050) 1/2 (1050) 3/4 (1000) 3/4 (1075) 3/4 (1075) 1.0 (1040) HIGH-PRESSURE SWITCH 650 +/- 15 (psig) Cut-out Reset (Auto) 420 +/- 25

LOSS-OF-CHARGE / LOW-PRESSURE 20 +/- 5 SWITCH (Liquid Line) (psig) cut-out Re- 45 +/- 10

set (auto)

RETURN-AIR FILTERSt$

Throwaway Size (in.) 20x20x1 20x24x1 24x30x1 Throwaway Size (mm) 508x508x25 508x610x25 610x762x25

1- Required filter 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 ft/minute for throwaway type or 450 ft/minute for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 IN. W.C..

$ If using accessory filter rack refer to the filter rack installation instructions for correct filter sizes and quantity.

024 030 036

2 2-1/2 3

356 360 378

161 163 171

042 048 060

3-1/2 4 5

436 470 515 198 213 234

Scroll

7.3 8.0 9.5 10.7 11.25 13.2

3.3 3.6 4.3 4.9 5.1 6.0 TXV

2...21 2...21 2...21 2...21 2...21 2...21

11.95 12.0 13.6 15.4 17.4 19.3

2350 2700 2350 2800 3300 3300

22 22 22 22 22 22

558.8 558.8 558.8 558.8 558.8 558.8

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

3...15 3...15 4...15 3...15 4...15 4...17

3.7 3.7 3.7 4.7 4.7 5.7

Step 6 -- Connect Condensate Drain

NOTE: When installing condensate drain connection be sure to comply with local codes and restrictions.

Model 50XP disposes of condensate water through a 3/4 in. NPT fitting which exits through the base on the evaporator coil access

side (See Fig. 2 and 3 for location). Condensate water can be drained directly onto the roof in rooftop

installations (where permitted) or onto a gravel apron in groundlevel installations. Install a field-supplied condensate trap at end of condensate connection to ensure proper drainage. Make sure

that the outlet of the trap is at least 1 in. (25 ram) lower than the drainpan condensate connection to prevent the pan from

overflowing (See Fig. 11). When using a gravel apron, make sure it slopes away from the unit.

1" (25 mm) MIN.

A08001

Fig. 11 - Condensate Trap

Connect a drain tube using a minimum of 3/4 -in. PVC or 3/4 -in. copper pipe (all field-supplied) at the outlet end of the 2-in. (51 ram) trap. Do not undersize the tube. Pitch the drain tube

downward at a slope of at least 1-in. (25 ram) for every 10ft (3 m) of horizontal run. Be sure to check the drain tube for leaks. Prime

trap at the beginning of the cooling season start-up.

Table 2 - Minimum Airflow for Safe Electric Heater Operation

(Cfm)

SIZE

024 030 036 042 048 060 800 1000 1200 1400 1600 2000

Step 7 -- Install Duct Connections

The unit has duct flanges on the supply- and return-air openings on the side and bottom of the unit. For downshot applications, the

ductwork can be connected to the roof curb (See Fig. 2 and 3 for connection sizes and locations).

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

ensure weathertight and airtight seal. When electric heat is installed, use fire proof 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.

(610 ram) from the unit discharge connection flange into the ductwork.

Page 9

CONFIGURING UNITS FOR DOWNFLOW(VER- TICAL) DISCHARGE

ELECTRICALSHOCK HAZARD Failure to follow this warning could result in personal

injury or death. Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect switch. Turn off accessory heater power switch if

applicable. Tag disconnect switch with a suitable warning

label.

1. Open all electrical disconnects before starting any service work.

2. Remove side duct covers to access bottom return and supply knock out covers (See Fig. 13).

3. To remove supply and return duct covers, use screwdriver and a hammer.

4. If unit ductwork is to be attached to vertical opening flanges on the unit base (jackstand applications only), do so at this

time. Collect ALL screws that were removed. Do not leave screws on rooftop as permanent damage to the roof may

occur.

........y .......................................

I I

SUPP_ RETURN DUCT DUCT

OPENING OPENING

Fig. 12 - Supply and Return Duct Opening

C99011

VERTICAL DUCT COVERS

C99012

Fig. 13 - Vertical Duct Cover Removed

5. It is recommended that the unit base insulation around the perimeter of the vertical return-air opening be secured to

the unit base with alunfinum tape. Applicable local codes may require alunfinum tape to prevent exposed fiberglass.

6. Cover both horizontal duct openings with the duct covers shipped on the unit from the factory. Ensure opening is

air-and watertight.

7. After completing unit conversion, perform all safety checks and power up unit.

NOTE: The design and installation of the duct system must be in

accordance with the standards of the NFPA for installation of

nonresidence-type air conditioning and ventilating systems, NFPA

90A or residence-type, NFPA 90B; and/or local codes and

ordinances.

8. Select and size ductwork, supply-air registers, and return-air grilles according to American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE)

recommendations.

9. Use flexible transition between rigid ductwork and unit to prevent transnfission of vibration. The transition may be

screwed or bolted to duct flanges. Use suitable gaskets to ensure weathertight and airtight seal.

10. All units must 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.

11. Size all ductwork for maximum required airflow (either heating or cooling) for unit being installed. Avoid abrupt

duct size increases or decreases or performance may be affected.

12. Adequately insulate and weatherproof all ductwork located outdoors. Insulate ducts passing through unconditioned

space, and use vapor barrier in accordance with latest issue of Sheet Metal and Air Conditioning Contractors National

Association (SMACNA) and Air Conditioning Contractors

of America (ACCA) nfininmm installation standards for heating and air conditioning systems. Secure all ducts to

building structure.

13. Flash, weatherproof, and vibration-isolate all openings in

building structure in accordance with local codes and good building practices.

Page 10

Step 8 -- Install Electrical Connection

ELECTRICALSHOCK HAZARD Failure to follow this warning could result in personal

iniury or death. The unit cabinet must have an uninterrupted, unbroken

electrical ground. This ground may consist of an electrical wire connected to the unit ground screw in the control compartment, or conduit approved for electrical ground when installed in accordance with NEC, ANSI/NFPA 70

American National Standards Institute/National Fire Protection Association (latest edition) (in Canada, Canadian

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

[]NIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the

unit being installed.

1. Make all electrical connections in accordance with NEC ANSI/NFPA 70 (latest edition) and local electrical codes

governing such wiring. In Canada, all electrical connections must be in accordance with CSA standard

C22.1 Canadian Electrical Code Part 1 and applicable local codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between field-supplied electrical disconnect switch and unit. DO

NOT USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within operating voltage range indicated on unit rating plate.

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 for maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for

wire sizing. The field-supplied disconnect switch box may be mounted on the

unit over the high-voltage inlet hole when the standard power and low-voltage entry points are used (See Fig. 2 and 3 for acceptable

location). See unit wiring label and Fig. 14 for reference when making high

voltage connections. Proceed as follows to complete the connections to the unit.

Single phase units:

1. Run the high-voltage (L1, L2) and ground leads into the control box.

2. Connect ground lead to chassis ground connection.

HIGH VOLTAGE r" POWER LEADS [ca, . . . (SEE UNITWIRING <[

LABEL) Le_

. ""LPowER

-uzn . - I SUPP

FIELD-SUPPLIED

CONTROL BOX

LOW-VOLTAGE POWER LEADS-

(SEE UNIT

WIRING LABEL)

LEGEND

Field Control-Voltage Wiring

Field High-Voltage Wiring .......

Fig. 14 - High- and Control-Voltage Connections

3. Connect L1 to pressure lug connection 11 of the compressor contactor.

4. Connect L2 to pressure lug connection 23 of the compressor contactor.

Three phase units:

1. Run the high-voltage (L1, L2, L3) and ground leads into the control box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the lines side of the contactor.

4. Connect field LI to black wire on connection 11 of the compressor contactor.

5. Connect field wire L2 to yellow wire on connection 13 of the_compressor contactor.

6. Connect field wire L3 to Blue wire from compressor.

GND

SPLICE BOX

SPECIAL PROCEDURES FOR 208-V OPERATION

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before installing or servicing system, always turn off main power to system. With disconnect switch open, move yellow

wire from transformer (3/16 in.) terminal marked 230 to terminal marked 208. This retaps transformer to primary

voltage of 208 vac.

CONTROL VOLTAGE CONNECTIONS

NOTE: Do not use any type of power-stealing thermostat. Unit control problems may result.

Use no. 18 American Wire Gage (AWG) color-coded, insulated (35 C minimum) wires to make the control voltage connections

between the thermostat and the unit. If the thermostat is located more than 100 ft (30 m) from the unit (as measured along the

control voltage wires), use no. 16 AWG color-coded, insulated (35

C minimum) wires.

FUSED DISCONNECT

2LKLD 2

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BRN_(C)

=GRA'_'W=2)'_1 ["0

A08475

Page 11

EASYSELECT'_-50XPEASYSELECTCONFIGURATION TAPSFOR50XP

EasySelecttapsareusedbytheinstallertoconfigureasystem.The ECMmotorusestheselectedtapstomodifyitsoperationtoa

pre-programmedtableofairflows. Theunitmustbeconfiguredtooperateproperlywithsystem

componentswithwhichitisinstalled.Tosuccessfullyconfigurea basicsystem(seeinformationprintedoncircuitboardlabellocated nexttoselectpins),movethe6 selectwirestothepinswhich

matchthecomponentsused.

a.AUXHEATkW/CFM-SELECTHEATERRANGE

FORSIZEOFELECTRICHEATERINSTALLED Installermustselecttheauxiliaryheatairflowapproved

forapplicationwithkWsizeheaterinstalled.Ifno heaterisinstalled,thisstepcanbeskipped.Eachselect

pinismarkedwitharangeofheatersforwhichairflow (alsomarked),isapproved.Forincreasedcomfort,select

thenarrowestkWrangematchingtheheatersize,for example,0-10for10-kWheater.Thisairflowmustbe

greaterthantheminimumforCFMforelectricheater applicationwiththesizesysteminstalledforsafeand continuousoperation.(SeeTables2&4-6forairflow

deliveryandminimumCFM.)Notethatairflowmarked istheairflowwhichwillbesuppliedinemergencyheat

modeandheatingmodeonairconditionerswhen electricheatistheprimaryheatingsource.Inheatpump

heatingmodewhenelectricheatersareenergized,the ECMwillrunthehigherofheatpumpheatingairflow

andelectricheaterairflowtoensuresafeheater operation.Thefactoryselectionisthelargestheater

rangeapproved(SeeFig.15,Aasindicated).

b. AC/HPSIZE-SELECTSYSTEMSIZEINSTALLED

Thefactorysettingforairconditionerorheatpumpsize isthesizewhichmatchesthemodelofpackagedunit

installed.Installershouldverifyairconditionersizeto ensurethatairflowdeliveredfallswithinproperrange

forthesizeunitinstalled.Thisappliestoalloperational modeswiththeexceptionofelectricheatmodes(See Fig.15,Basindicated).

c.SYSTEMTYPE-SELECTSYSTEMTYPE

INSTALLED Thetypeofsystemwillbefactoryselected(seebelow

fordetails): (1.)AC-Airconditioner(FactorySelectedfor50XP)

d.AC/HPCFMADJUST--SELECTNOMINAL,LOW,

ORHIGHAIRFLOW TheAC/HPCFMAdjustselectisfactorysettothe

High-Hi(NOMfor060)tap.TheCFMAdjust selectionsNOM/LOwillregulateairflowsuppliedfor

alloperationalmodes,exceptnon-heatpumpheating modes.HIprovides15percentairflowovernominal unitsizeselectedandLOprovides10percentairflow

belownominalunitsizeselected.CFMAdjustselection optionsareprovidedtoadjustairflowsuppliedtomeet

individualinstallationneedsforsuchthingsasnoise, comfort,andhumidityremoval(SeeFig.15,Das

indicated).

9 PINCONNECTOR

'CM F)RINTED CIRCUIT BOARD "_ /"

0aG 0_0 024 01_

cg_ _ I _, I _ I_ II1{_11R

Fig. 15 - Detail of SPP Printed-Circuit Board

e. ON/OFF DELAY- SELECT DESIRED TIME

DELAY PROFILE Four motor operation delay profiles are provided to

customize and enhance system operation (See Fig. 15, E

as indicated).

Selection options are:

(1.) The standard 90 sec off delay (Factory Setting) at

100 percent airflow in cooling mode.

(2.) A 30 sec cooling delay with no airflow/90 sec off delay at 100 percent airflow profile is used when it is desirable to allow system coils time to

heat-up/cooldown in coniunction with the airflow in cooling mode.

(3.) A no delay option used for servicing unit or when a thermostat is utilized to perform delay functions.

(4.) ENH, enhanced selection, provides a 30 sec cooling on delay with no airflow/plus 150 sec at 70 percent

airflow/no off delay for added comfort.

f. CONTINUOUS FAN-SELECT DESIRED FAN

SPEED WHEN THERMOSTAT IS SET ON CONTINUOUS FAN

(1.) LO speed-Factory setting, 50 percent cooling mode

airflow.

(2.) MED speed-Move connector to MED, 65 percent cooling mode airflow.

(3.) HI speed-Move connector to HI, 100 percent cooling mode airflow (See Fig. 15, F as indicated).

g. LOW-VOLTAGE CIRCUIT FUSING AND

REFERENCE The low-voltage circuit is fused by a board-mounted 5-amp automotive fuse placed in series with the

transformer SEC2 and the R circuit. The C circuit of the transformer is referenced to chassis ground through a

printed circuit run at SECI connected to metal standoff marked with ground symbol.

h. BASIC UNIT CONFIGURATION

The following basic configuration of the indoor motor will provide ARI rated performance of the System. This

BASIC CONFIGURATION should be used when the rated ARI performance is required, or if system

enhancements such as super dehumidify are not needed. (1.) AUX HEAT kW/CFM-Select the heater range for

the size of electric heater installed (skip this step if no heater is installed).

P P P I l/ /1 II1_, 11½

_/,, .......

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i......i.... Ili!ll

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12 PIN CONNECTOR

C01033

Page 12

(2.)AC/HP SIZE-Factory selected to match system size

installed, please verify. (3.) SYSTEM TYPE-Factory selected AC (50XP).

(4.) AC/HP CFM ADJUST-Select HIGH for 042 & 048, NOM for 036 & 060, and LO for 024 & 030.

(5.) ON/OFF DELAY-Select 0/90 profle. (6.) CONTINUOUS FAN-Select desired fan speed

when thermostat is set to continuous fan.

i. COMFORT OPTIONS-SUPER DEHUMIDIFY (See

Quick Reference Guide) The Super Dehumidify option is possible when this unit

is installed with a field supplied Thermidistat _ control (Super Dehumidify does not require an outdoor

temperature sensor). The following configuration is recommended for maxinmm cooling/dehumidifying

comfort: This configuration will improve the comfort provided by the air conditioning system if more humidity removal is desired. While providing this

improved comfort, the system will operate efficiently, but not at the published HSPF or ARI SEER efficiency.

The following system configuration is recommended

for maxinmm heating and cooling/dehumidifying comfort (See Fig. 15). (1.) AUX HEAT kW/CFM-Select the narrowest heater

range to match size of electric heater installed (skip this step if no heater is installed).

(2.) AC/HP Size-Factory selected to match system size installed, please verify AC selection.

(3.) SYSTEM TYPE-Select AC (for air conditioner system).

(4.) AC/HP CFM ADJUST-Select NOM (Lo for 060). (5.) ON/OFF DELAY-Select ENH profile.

(6.) CONTINUOUS FAN-Select desired fan speed when thermostat is set to continuous fan.

(7.) DEHUMIDIFY MODE-Remove Jl jumper to activate.

(8.) LOW VOLTAGE CONNECTIONS-Make connections as shown in ELECTRICAL

CONNECTIONS section. (9.) CONFIGURE THERMIDISTAT TM (or capable

zoning system)-Following its installation instructions for Super Dehumidify and Super Comfort Heat

operation. This configuration provides the following comfort enhancements:

(a.) A 30 sec blower on delay with 150 sec at 70 percent airflow to allow the indoor coil to warm up or cool

down before the blower is asked to deliver 100 percent airflow reducing the cold blow sensation at start up in

heating and allowing the indoor coil to more quickly reach wet coil operating conditions in cooling.

(b.) A no blower off delay eliminates cold blow which may be associated with running the blower after shut

down of the compressor and avoids reevaporation of condensed moisture after cooling/dehumidifying

operation. (c.) Lower airflow while the compressor is running to

reduce draft effects and increase heating air temperature and improved humidity control during cooling

operation. ACCESSORY INSTALLATION

a. ACCESSORY ELECTRIC HEATERS

Electric heaters may be installed with the 50XP units per instructions supplied with electric heater package.

See unit rating plate for factory-approved electric heater kits.

b. AUXILIARY TERMINALS

The AUX and HUM terminals on the Easy Select Board are tied directly to the G terminal, and provide a 24-v. signal whenever the G terminal is energized (See Fig.

15). During Super dehumidify mode, the G signal is not present and the auxiliary terminals are not energized. If the installation includes the use of the operating mode,

do not use these terminals to control accessories. See Electronic Air Cleaner and Humidifier sections for

further information.

ELECTRONIC AIR CLEANER CONNECTIONS The AUX1 and AUX2 terminals are not always energized

during blower operations, as described above. When using an electronic air cleaner with the unit, use Airflow

Sensor (See Air Cleaner Price Pages for Part Number).

The airflow sensor turns on electronic air cleaner when the blower is operating.

HUMIDISTAT

HUM 1R

(C)

HUM 2R

(G)

24-VAC TO HUMIDIFIER

HUMIDIFIER WIRING

A95317

Fig. 16 - Humidifier Wiring for 50XP

EASY SELECTD

BOARDTERMINALD

BLOCK

-- HUMIDISTAT

REMovE

JUMPER

A95316

Fig. 17 - Humidistat Wiring for De-Humidify Mode for 50XP

d. HUMIDIFIER/HUMIDISTAT CONNECTIONS Easy

Select Board terminals HUMI and HUM2 are provided

for direct connection to the low-voltage control of a humidifier through a standard humidistat (See Fig. 15).

These terminals are energized with 24-v. when G thermostat signal is present. (See Fig. 15, 16 & 17).

Alternately, the 24-v. signal may be sourced from the W

and C circuit board connections. When using a

Thermidistat Control, Zone Comfort Plus or Comfort Zone II, the 24-v. signal may be sourced directly from

the Thermidistat HUM terminal.

e. DEHUMIDIFY CAPABILITY WITH STANDARD

HUMIDISTAT CONNECTION Latent capacities for these units are better than average

systems. If increased latent capacity is an application requirement, the circuit board provides connection

terminals for use of a standard humidistat. The unit will detect the humidistat contacts opening on increasing

humidity and reduce its airflow to approximately 80 percent of nominal cooling mode airflow. This reduction will increase the

system latent capacity until the humidity falls to a level which causes the humidistat to close its contacts. When

the contacts close, the airflow will return to 100 percent of selected cooling airflow. To activate this mode,

remove jumper J1 and wire in a standard humidistat (See Fig. 15).

f. DEHUMIDIFY AND SUPER DEHUMIDIFY

CAPABILITIES

These models are capable of responding to a signal from indoor system control (thermostat, Thermidistat, zoning

Page 13

control)tooperateincomfortcontrolmodessuchas SuperDehumidifyMode.Consultliteratureprovided withindoorsystemcontroltodetermineifthese

operatingmodesareavailable,andtoseecontrolsetup instructions.Nospecialsetuporwiringofunitis

required.

STANDARDCONNECTION

Locate the seven low voltage thermostat leads in 24 volt splice box. See Fig. 14 for connection diagram. Run the low-voltage leads from the thermostat, through the control wiring inlet hole

grommet (Fig. 2 and 3), and into the low-voltage splice box. Provide a drip loop before running wires through panel. Secure

and strain relief all wires so that they do not interfere with operation of unit.

If an accessory electric heater is installed, low voltage leads from heater must be connected to factory supplied control leads from

Indoor Fan Board. Factory wires are provided for electric heat staging Wl and W2. If room thermostat has only one stage of

supplemental heat, connect white and gray wires shown in Fig. 14 to second stage heat field wire. Some electric heaters have four control wires (plus common wire). Consult unit wiring diagram

and electric heater wiring diagram for additional details. TRANSFORMER PROTECTION

The transformer is of the energy-limiting type. It is set to withstand a 30-second overload or shorted secondary condition.

1/8" (3 mm)MAXBETWEEN MOTORSHAFT MOTORAND FAN HUB

A08474

Fig. 18 - Fan Blade Clearance

PRE-START-UP

FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury, death or property damage.

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

2. Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and

secured.

3. Do not remove compressor terminal cover until all electrical sources are disconnected and tagged.

4. Relieve and recover all refrigerant from system before touching or disturbing anything inside terminal box if

refrigerant leak is suspected around compressor terminals.

5. Never attempt to repair soldered connection while refrigerant system is under pressure.

6. Do not use torch to remove any component. System contains oil and refrigerant under pressure.

7. To remove a component, wear protective goggles and proceed as follows:

a. Shut off electrical power to unit and install

lockout tag.

b. Relieve and reclaim all refrigerant from system

using both high- and low-pressure ports.

c. Cut component connecting tubing with tubing

cutter and remove component from unit.

d. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to flame.

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

1. Remove access panel.

2. Read and follow instructions on all 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, halide torch, or liquid-soap solution. If a refrigerant leak is detected,

see Check for Refrigerant Leaks section under Start-Up.

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

sure that connections are completed and tight.

d. d. Inspect coil fins. If damaged during shipping and

handling, carefully straighten fins with a fin comb.

Verify the following conditions:

a. Make sure that condenser-fan blade is correctly

positioned in fan orifice. Leading edge of condenser-fan blade should be 1/2 in. (13 mm) maximum from fan

orifice (see Fig. 18).

b. Make sure that air filter(s) is in place.

c. Make sure that condensate drain trap is filled with

water to ensure proper drainage.

d. Make sure that all tools and miscellaneous loose parts

have been removed.

Page 14

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A08460

Page 15

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A08461

Page 16

START-UP

CHECK FOR REFRIGERANT LEAKS Proceed as follows to locate and repair a refrigerant leak and to

charge the unit:

1. Locate leak and make sure that refrigerant system pressure has been relieved and reclaimed from both high- and

low-pressure ports.

2. Repair leak following accepted practices.

NOTE: Replace filter drier whenever the system has been opened for repair.

3. Charge unit with R-410A refrigerant, using a volumetriccharging cylinder or accurate scale. Refer to unit

rating plate for required charge.

START UP COOLING SECTION AND MAKE ADJUSTMENTS

UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the

unit being installed.

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 compressor when the outdoor temperature is below 55°F (13°C) (unless accessory low-ambient kit is installed). Do not rapid-cycle the compressor. To prevent compressor damage allow 5 minutes between "on" cycles.

50XP: START-UP IMPORTANT: Three-phase, scroll compressor units are

direction-oriented. These units must be checked to ensure proper compressor 3-phase power lead orientation. If not corrected within 5 minutes, the internal protector shuts off the compressor. The 3-phase power leads to the unit must be reversed to correct rotation. When turning backwards, scroll compressors emit elevated noise levels, and the difference between compressor suction and discharge pressures may be zero.

CHECKING COOLING CONTROL OPERATION Start and check the unit for proper cooling control operation as

follows:

1. Place room thermostat SYSTEM switch in OFF position. Observe that blower motor starts when FAN switch is

placed in ON position and shuts down when FAN switch is placed in AUTO position.

2. Place SYSTEM switch in COOL position and FAN switch in AUTO position. Set cooling control below room

temperature. Observe that compressor, condenser fan, and evaporator blower motors start. Observe that cooling cycle

shuts down when control setting is satisfied. The evaporator fan will continue to run for the selected off delay.

3. When using an auto-changeover room thermostat, place both SYSTEM and FAN switches in AUTO positions.

Observe that unit operates in heating mode when temperature control is set to "call for heating" (above room

temperature) and operates in cooling mode when temperature control is set to "call for cooling" (below room

temperature).

NOTE: Once the compressor has started and then has stopped, it will not start again until 5 minutes have elapsed. (The cooling

cycle remains "on" until the room temperature drops to point that is

slightly below the cooling control setting of the room thermostat. At this point, the thermostat "breaks" the circuit between

thermostat terminal R to terminals Y and G.) These open circuits de-energize contactor coil C and ECM board. The condenser and

compressor motors stop. After the time delay setting selected on the Easy Select board (See Easy Select Section), the blower motor

stops. The unit is in a "standby" condition, waiting for the next "call for cooling" from the room thermostat.

CHECKING AND ADJUSTING REFRIGERANT CHARGE

The refrigerant system is fully charged with R-410A refrigerant, tested, and factory-sealed.

[]NIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal iniury or equipment damage.

When evaluating the refrigerant charge, an indicated adjustment to the specified factory charge must always be very minimal. If a substantial adjustment is indicated, an abnormal condition exists somewhere in the cooling system, such as insufficient airflow across either coil or both

coils.

NOTE: Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper R-410A charge. The charging label and the tables shown refer to system

temperatures and pressures. IMPORTANT: When evaluating the refrigerant charge, an

indicated adjustment to the specified factory charge must always be very minimal. If a substantial adjustment is indicated, an abnormal

condition exists somewhere in the cooling system, such as insufficient airflow across either coil or both coils.

Refrigerant charge The amount of refrigerant charge is listed on the unit nameplate.

Refer to the Refrigeration Service Techniques Manual, Refrigerants section.

[]nit panels must be in place when unit is operating during charging procedures.

No charge

Check for leak. Use standard evacuating techniques. After

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

Low charge cooling Use Cooling Charging Chart (Fig. 21). Vary refrigerant until the

conditions of the chart are met. Note that charging charts are different from type normally used. Charts are based on charging

the units to correct subcooling for the various operating conditions. Accurate pressure gauge and temperature sensing devices are

required. Connect the pressure gauge to the service port on the suction line. Mount the temperature sensing device on the suction line and insulate it so that the outdoor ambient does not affect the

reading. Indoor air CFM must be within the normal operating range of the unit.

To use cooling charging charts Take the liquid line temperature and read the manifold pressure gauges. Refer to the chart to determine what the liquid line

temperature should be. NOTE: If the problem causing the inaccurate readings is a

refrigerant leak, refer to Check for Refrigerant Leaks section.

Page 17

Required Subcooting oF (oC) Required Liquid Line Temperature for a Specific Subcooling (R-410A)

Model Size

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

2- Measure the Liquid line temperature by attaching a temperature sensing device to it.

3- Insulate the temperature sensing device 8o that the Outdoor Ambient doesn'#affect the reading.

4- Refer to the required Subcooling in the table based on the model size and the Outdoor Ambient temperature.

5- Interpolate if the Outdoor ambient temperature lie8 in between the table values. Extrapolate if the temperature lie8 beyond the table range.

6- Find the Pressure Value in the table corresponding to the the measured Pressure of the Compre88or Discharge line.

7- Read acro88 from the Pressure reading to obtain the Liquid line temperature for a required Subcooling

8- Add Charge if the measured temperature i8 higher than the table value.

50xz500174 ] 534 134 129 124 119 114 3681 58 54 51 48 45

75 (24) 82 (28) 85 _ 95 (35) 105 H1) Pr_sur_ Pr@sur_

024 10.3(5.7) 9.8(5.4) 9,4(5.2) 9(5) 8,6(4.7) 189 61 56 51 46 41 1303 18 13 11 8 5 030 9.3(5.2) 8.8(4.9) 8,6(4.8) 7.8(4.3) 7(3.9) 198 63 58 53 48 43 1351 17 15 12 9 6

038 17.8(9.8) 16.8(9.3) 16.5(9.2) 15,4(8.8) 14.3(7,9) 203 66 61 56 51 46 139g 19 16 13 10 8 042 12.8(7.1) 12.7(7.1) 12.7(7.1) 12.6(7) 12,6(7) 210 68 63 58 53 48 1448 20 17 14 11 9

048 17.5(9.7) 16.9(9.4) 16.6(9.2) 15,7(8.7) 14.8(8,2) 217 70 65 60 55 50 1496 21 18 15 13 10 060 13.7(7.6) 13(7,2) 13(7.2) 14,5(8.1) 11.5(6,4) 224 72 67 62 57 52 1544 22 19 16 14 11

Charqinq Procedure 23t 74 69 64 5g 54 1593 23 20 18 15 12

Outdoor Ambient Temperature Required Subcooling (° R Required Subcooling (°C)

(p_ 5 10 15 20 25 (kPa) 3 6 8 11 14

238 76 71 66 61 56 1641 24 21 19 16 13 245 77 72 67 62 57 168g 25 22 20 17 14

252 79 74 69 64 59 1737 28 23 21 18 15 260 81 76 71 66 61 1792 27 25 22 19 16 268 83 78 73 68 63 1848 29 26 23 20 17 276 85 80 75 70 65 1903 30 27 24 21 19

284 87 82 77 72 67 1958 31 28 25 22 20 292 89 84 79 74 69 2013 32 29 26 23 21

300 91 86 8t 76 71 2068 33 30 27 24 22 309 93 88 83 78 73 2130 34 31 28 26 23

318 95 90 85 80 75 2192 35 32 29 27 24 327 97 92 87 82 77 2254 38 33 31 28 25

336 99 94 89 84 79 2316 37 34 32 29 26 345 101 96 91 86 81 2378 38 35 33 30 27 354 103 98 93 88 83 2440 39 36 34 31 28 364 105 100 95 90 85 250g 40 38 35 32 29

374 107 102 97 92 87 2578 41 39 38 33 30 384 108 103 98 93 88 2647 42 40 37 34 31 394 110 105 100 95 90 2716 44 41 38 35 32 404 112 107 102 97 92 2785 45 42 39 36 33

414 114 109 104 9g 94 2854 46 43 40 37 34 424 116 111 106 101 96 2923 47 44 41 38 35 434 118 113 108 103 98 2992 48 45 42 39 38 444 11g 114 10g 104 99 3061 48 46 43 40 37

454 121 116 111 106 101 3130 49 47 44 41 38 464 123 118 113 108 103 319g 50 48 45 42 39 474 124 119 114 109 104 3268 51 48 48 43 40 484 126 121 116 111 106 3337 52 49 47 44 41

494 127 122 117 112 107 3406 53 50 47 45 42 504 129 124 11g 114 10g 3475 54 51 48 46 43 514 131 126 121 116 111 3544 55 52 49 46 44

524 132 127 122 117 112 3612 56 53 50 47 45

Fig. 21 - Cooling Charging Table-Subcooling

C03027

INDOOR AIRFLOW AND AIRFLOW ADJUST- MENTS

NOTE: For cooling operation, the recommended airflow is 350 to 450 cfm for each 12,000 Btuh of rated cooling capacity.

Table 3 & 4 show 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.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Disconnect electrical power to the unit before changing blower speed.

Airflow can be changed by changing the selection pins. To change the speed of the blower motor (BM), change pin selection on the

Easy Select Board. 50XP SEQUENCE OF OPERATION

a. CONTINUOUS FAN

1. Thermostat closes circuit R to G-The Blower runs at continuous fan airflow.

b. COOLING MODE-LOW HUMIDITY

2. If indoor temperature is above temperature set point and humidity is below humidity set point, thermostat closes

circuits R to G, R to Y/Y2 and R to O-The unit delivers cooling airflow.

c. COOLING MODE-DEHUMIDIFICATION

1. If indoor temperature is above temperature set point and humidity is above humidity set point, thermostat or

Thermidistat closes circuits R to G, R to O, and R to Y/Y2 and humidistat or Thermidistat opens R to DH-The unit

delivers airflow which is approximately 80 percent of the nominal cooling airflow to increase the latent capacity of

the system. d. COOLING MODE-SUPER DEHUMIDIFY

OPERATION

(see quick reference guide) NOTE: The indoor control used, such as a Thermidistat, must be

capable of providing Super Dehumidify operation mode and control must be configured as outlined in its installation

instructions. Consult indoor control literature to determine if control is capable of providing Super Dehumidify inputs and for

configuration instruction.

1. If the indoor temperature is below the temperature set point and the humidity is above the humidity set point, the

Thermidistat closes circuit R to O, opens circuits R to DH and R to G, and cycles circuit R to Y/Y2. If circuit R to G is closed (24-v.), the motor will deliver airflow at the full

cooling or cooling plus dehumidify mode requested value. If circuit R to G is open (0-v.) for super dehumidify mode,

the motor delivers reduced airflow to maximize the humidity removal of the system while minimizing over

cooling.

Page 18

Table 3 - 50XP Cooling Dry Coil ECM Airflow Small Cabinet

UNIT SIZE

024

030

036

CFM ADJUST PIN SELECT

EXTERNAL STATIC

PRESSURE RANGE

COOLING

COOLING DEHUMIDIFY

COOLING

COOLING DEHUMIDIFY

COOLING

COOLING DEHUMIDIFY

0.0-0.39

8OO 715

1010

89O

1110

99O

LO PIN

0.4-0.69

725 670

920 845

1025

960

NOM PIN

0.7-1,0 0.0-0.39 0.4-0.69

885 805 715 695

825 1105 1030 795 890 865

970 1235 1175 910 990 975

0.7-1.0

73O 645

93O 825

1115

94O

HI PIN

0.0-0.39 0.4-0.69 0.7-1.0

990 930 855 795 775 745

1255 1160 1050 1010 980 925

1400 1355 1280 1125 1110 1085

Table 4 - 50XP Cooling & Heating Dry Coil ECM Airflow Large Cabinet

CFM ADJUST PIN SELECT LO PIN NOM PIN NOM PIN

UNIT SIZE EXTERNAL STATIC

042

048

060

UNIT STANDARD CFM (SCFM)

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

024 0.005 0.007 0.010 0.012 0.015 ...........

030 - 0.007 0.010 0.012 0.015 0.018 0.021 0.024 ........

036 - - - 0.019 0.023 0.027 0.032 0.037 0.042 0.047 ......

042 .... 0.014 0.017 0.020 0.024 0.027 0.031 0.035 0.039 0.043 - - -

048 ...... 0.027 0.032 0.036 0.041 0.046 0.052 0.057 0.063 0.068 -

060 ......... 0.029 0.032 0.036 0.040 0.045 0.049 0.053

PRESSURE RANGE

COOLING 1100 1225 1410

COOLING DEHUMIDIFY 980 980 1125

COOLING 1260 1400 1610

COOLING DEHUMIDIFY 1120 1120 1290

COOLING 1575 1750 2010

COOLING DEHUMIDIFY 1400 1400 1610

Table 5 - ECM Wet Coil Pressure Drop (in. wc)

0.1-1.0 0.1-1.0 0.1-1.0

Table 6 - Filter Pressure Drop Table (in. wc)

FILTER SIZE CFM

in.(mm) 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

20X20X1

(508X508X25)

20X24X1

(508X610x25)

24X30X1

(610X762x25)

5kw 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07

7.5 kw 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.07 0.08 0.09 10 kw 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11

15 kw 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.t2 0.14 0.t6 0.18 20 kw 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.tl 0.t3 0.t5 0.t7 0.t9

1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500

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

7,6 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13

10 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 16 kw 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15

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

0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 ...........

-- -- -- 0.09 0.10 0.11 0.13 0.14 0.15 0.16 ........

....... 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18

Table 7 - Electric Heat Pressure Drop Table

Small Cabinet: 024-036 cfm

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

Table 8 - Electric Heat Pressure Drop Table

Large Cabinet: 042-060 cfm

Page 19

9 PIN CONNECTOR --

ECM PRINTED CIRCUIT BOARD __

rm rm

EASYSELECT TM

SEC1 SEC2 l

AUX HEAT kW/CFM

a-J

O36 03O

,, SYSTEM TYPE Q_ DH

..... R

• ACiHP CFMADJUST ' _ W2

ON/OFF DELAY Q_ G

D__/_ BL_ _ L_ _ I_ I _ YI

E----,_ _ _ _ _÷ e C

_ Y/_

e' O

F__i A yE___LOI_I_1_ I _EL _ - _AUX224VAc_HUM2

7 =

Z]2 PIN CONNECTOR

1. Configuration Taps (See Installation Instructions, for detailed description)

A. AUX HEAT - Set for heater size if applicable D

B. AC/HP SIZE - Set for size of outdoor unit (Cooling Size)

C. SYSTEM TYPE - Select "AC" for Packaged AC Units

D. AC/HP CFM ADJUST - Select "LO" E. ON/OFF DELAY - Select "ENH" F. CONTINUOUS FAN - Select desired speed

2. Remove Jumper J1 to activate all dehumidify modes

3. Complete wiring and install outdoor temperature D sensor according to Installation Instructions

1. Set "DIP Switches" - Set the dip switches (back of D Thermidistat Control Board) appropriately for specific D system being installed.

2. Thermidistat Control Configurations

(See Thermidistat Control installation Instructions for detailed description)l]

* Option 5 (Variable Speed Indoor Motor) - Set to ON * Option 7 (Super Dehumidify) - Set to ON

* Option 17 - Select Programmable or non-programmable mode.

3. Set desired humidity level on fron of Thermidistat

(50 to 55 % RH recommended). For dehumidification in cooling, both "dhu" and "cool" must be displayed.

(EX:o-10for 10kW)D

Fig. 22 - ECM ID Blower Motor-Quick Reference Guide

e. ELECTRIC HEATING MODE

1. Thermostat closes circuit R to W/WI, or W2-The unit delivers the selected electric heat airflow. There are no on or

off delays.

f. HEATING MODE-SUPER COMFORT HEAT

OPERATION

NOTE: The indoor control used, such as a Thermidistat, must be capable of providing Super Comfort Heat operation mode and control must be configured as outlined in its installation instructions. The system must be installed with appropriate outdoor temperature sensor. Consult indoor control literature to determine if control is capable and for configuration instructions. Consult

indoor control instructions and sensor instructions for sensor installation details.

If the outdoor temperature is in the range of 12°F to 40°F (II°C to 4°C), the Thermidistat closes circuit R to Y/Y2 and opens

circuit R to G. If circuit R to G is closed (24-v.), the motor will deliver airflow at the full heating requested value. If circuit R to G

is open (0-v.) for maximum heating comfort, the motor delivers reduced airflow to maximize the temperature and minimize the

draft effect of the heated air leaving the unit.

C01034A

MAINTENANCE

To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic maintenance

must be performed on this equipment. This cooling unit should be inspected at least once each year by a qualified service person. To

troubleshoot heating or cooling of units, refer to tables at the back of the book.

NOTE: TO EQUIPMENT OWNER-Consult your local dealer

about the availability of a maintenance contract.

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal iniury or death and possible unit component damage.

The ability to properly perform maintenance on this equipment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment, other than those procedures recommended in the Owner's

Manual.

Page 20

ELECTRICALSHOCKHAZARD Failuretofollowthesewarningscouldresultinpersonal

injuryordeath:

1.Turnoffelectricalpowertotheunitbeforeperforming anymaintenanceorserviceonthisunit.

2.Useextremecautionwhenremovingpanelsandparts.

3.Neverplaceanythingcombustibleeitheronorincontact withtheunit.

UNITOPERATIONHAZARD Failuretofollowthiscautionmayresultin equipment

damageorimproperoperation. Errorsmadewhenreconnectingwiresmaycauseimproper

and

dangerousoperation.Labelall wirespriorto

disconnectingwhenservicing.

Theminimummaintenancerequirementsforthisequipmentareas follows:

1. Inspect air filter(s) each month. Clean or replace when necessary.

2. Each cooling season, inspect indoor coil, drain pan, and condensate drain for cleanliness. Clean when necessary.

3. Inspect blower motor and wheel for cleanliness and check lubrication each heating and cooling season. Clean when necessary.

4. Check electrical connections for tightness and controls for proper operation each heating and cooling season, Service

when necessary.

AIR FILTER

NOTE: 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 filter(s) at least once each month and replace (throwaway-type) or clean (cleanable-type) at least twice during

each heating and cooling season or whenever the filter(s) becomes clogged with dust and lint.

EVAPORATOR 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.

ELECTRICALSHOCK HAZARD

Failure to follow this warning could result in personal iniury or death.

Disconnect and tag electrical power to the unit before cleaning and lubricating the blower motor and wheel.

To clean the blower motor and wheel:

1. Remove and disassemble blower assembly as follows: a. Remove unit access panel.

b. Disconnect motor lead from blower relay (BR).

Disconnect yellow lead from terminal L2 of the contactor.

c. On all units, remove blower assembly from unit.

Remove screws securing blower to blower partition and slide assembly out. Be careful not to tear insulation in

blower compartment.

d. Ensure proper reassembly by marking blower wheel and

motor in relation to blower housing before disassembly.

e. Loosen setscrew(s) that secures wheel to motor shaft,

remove screws that secure motor mount brackets to housing, and slide motor and motor mount out of

housing.

2. Remove and clean blower wheel as follows: a. a. Ensure proper reassembly by marking wheel

orientation.

b. Lift wheel from housing. When handling and/or

cleaning blower wheel, be sure not to disturb balance weights (clips) on blower wheel vanes.

c. Remove caked-on dirt from wheel and housing with a

brush. Remove lint and/or dirt accumulations from wheel and housing with vacuum cleaner, using soft brush attachment. Remove grease and oil with mild

solvent.

d. Reassemble wheel into housing.

e. Reassemble motor into housing. Be sure setscrews are

tightened on motor shaft flats and not on round part of shaft.

f. Reinstall unit access panel.

3. Restore electrical power to unit. Start unit and check for

proper blower rotation and motor speeds during heating and cooling cycles.

CONDENSER COIL, EVAPORATOR COIL, AND CONDENSATE DRAIN PAN

Inspect the condenser coil, evaporator coil, and condensate drain pan at least once each year.

The coils are easily cleaned when dry; therefore, inspect and clean the coils either before or after each cooling season. Remove all

obstructions, including weeds and shrubs, that interfere with the

airflow through the condenser coil. Straighten bent fins with 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

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

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

snake or similar probe device. Ensure that the auxiliary drain port

above the drain tube is also clear.

Page 21

CONDENSER FAN

UNIT OPERATION HAZARD Failure to follow this caution may result in damage to unit

components. Keep the condenser fan free from all obstructions to ensure

proper cooling operation. Never place articles on top of the unit.

1. Remove 6 screws holding condenser grille and motor to top cover.

2. Turn motor/grille assembly upside down on top cover to expose the fan blade.

3. Inspect the fan blades for cracks or bends.

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

5. When replacing fan blade, position blade so that the hub is 1/8 in. (3 mm) away from the motor end (1/8 in. [3 mm] of

motor shaft will be visible).

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

7. Replace grille.

ELECTRICAL CONTROLS AND WIRING Inspect and check the electrical controls and wiring annually. Be

sure to turn off the electrical power to the unit.

Remove access panel to locate all the electrical controls and

wiring. Check all electrical connections for tightness. Tighten all screw connections. If any smoky or burned connections are

noticed, disassemble the connection, clean all the parts, restrip the wire end and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace the access panel. Start the unit, and observe at least one complete heating cycle and one complete cooling cycle to ensure proper

operation. If discrepancies are observed in either or both operating cycles, or if a suspected malfunction has occurred, check each

electrical component with the proper electrical instrumentation. Refer to the unit wiring label when making these checkouts.

NOTE: Refer to the heating and/or cooling sequence of operation in this publication as an aid in determining proper control operation

REFRIGERANT CIRCUIT Inspect all refrigerant tubing connections and the unit base for oil

accumulations annually. Detecting oil generally indicates a refrigerant leak.

UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could result in personal

injury or equipment damage. 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.

If no refrigerant leaks are found and low cooling performance is suspected, refer to Checking and Adjusting Refrigerant Charge

section. EVAPORATOR AIRFLOW

The heating and/or cooling air-flow does not require checking unless improper performance is suspected. If a problem exists, be

sure that all supply- and return-air grilles are open and free from obstructions, and that the air filter is clean. When necessary, refer to

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

METERING DEVICE-TXV

The indoor metering device is a TXV type device. PRESSURE SWITCHES

Pressure switches are protective devices wired into the control circuit (low voltage). They shut off compressor if abnormally high or low pressures are present in the refrigeration circuit. These

pressure switches are specifically designed to operate with Puron (R-410A) systems. R-22 pressure switches must not be used as

replacements for the Puron (R-410A) air conditioner. LOSS OF CHARGE/LOW-PRESSURE SWITCH

(AIR CONDITIONER ONLY)

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 ohmmeter 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 psig. Never open system without breaking vacuum with dry nitrogen.

HIGH-PRESSURE SWITCH

The high-pressure switch is located in the discharge line and protects against excessive condenser coil pressure. It opens at 650 psig. High pressure may be caused by a dirty condenser coil, failed fan motor, or condenser air recirculation.

To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohmmeter leads across switch. You should have continuity on a good switch.

COPELAND SCROLL COMPRESSOR (PURON

REFRIGERANT) The compressor used in this product is specifically designed to

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

The compressor is an electrical (as well as mechanical) device. Exercise extreme caution when working near compressors. Power

should be shut off, if possible, for most troubleshooting techniques. Refrigerants present additional safety hazards.

If oil is detected or if low cooling performance is suspected, leak-test all refrigerant tubing using an electronic leak-detector,

halide torch, or liquid-soap solution. If a refrigerant leak is detected, refer to Check for Refrigerant Leaks section.

Page 22

EXPLOSIONHAZARD Failureto follow this warning could result in personal

iniury or death and/or property damage. Wear safety glasses and gloves when handling refrigerants.

Keep torches and other ignition sources away from

refrigerants and oils.

The scroll compressor pumps refrigerant throughout the system by the interaction of a stationary and an orbiting scroll. The scroll

compressor has no dynamic suction or discharge valves, and it is more tolerant of stresses caused by debris, liquid slugging, and

flooded starts. The compressor is equipped with an anti-rotational device and an internal pressure relief port. The anti-rotational

device prevents the scroll from turning backwards and replaces the need for a cycle protector. The pressure relief port is a safety device, designed to protect against extreme high pressure. The

relief port has an operating range between 550 and 625 psig differential pressure.

REFRIGERANT

UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could result in personal

injury or equipment damage. This system uses Puron (R-410A) refrigerant which has

manufacturer.

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. Gage 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 Copeland scroll compressor uses 3MAF POE oil. If additional

oil is needed, use Uniqema RL32-3MAF. If this oil is not availaMe, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC.

This oil is extremely hygroscopic, meaning it absorbs water readily. 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 SYN-

THETIC MATERIALS POE (polyolester) compressor lubricants are known to cause long

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

cracking) to occur in one year or more. When performing any service that may risk exposure of compressor oil to the roof, take

appropriate precautions to protect roofing. Procedures which risk

oil leakage include, but are not limited to, compressor replacement, repairing refrigerant leaks, replacing refrigerant components such

as filter drier, pressure switch, metering device, coil, accumulator,

or reversing valve.

Synthetic Roof Precautionary Procedure

1. Cover extended roof working area with an impermeable polyethylene (plastic) drip cloth or tarp. Cover an

@proximate 10 x 10 ft (3 x 3 m) area.

2. Cover area in front of the unit service panel with a terry cloth shop towel to absorb lubricant spills, 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 unit base.

4. Perform required service.

5. Remove and dispose of any oil contaminated material per local codes.

LIQUID LINE FILTER DRIER The filter drier is specifically designed to operate with Puron. Use

only factory-authorized components. Filter drier must be replaced whenever the refrigerant system is opened. When removing a filter

drier, use a tubing cutter to cut the drier from the system. Do not unsweat a filter drier from the system. Heat from unsweating will

release moisture and contaminants from drier into system. PURON (R-410A) REFRIGERANT CHARGING

Refer to unit information plate and charging chart. Some R-410A refrigerant cylinders contain a dip tube to allow liquid refrigerant to flow from cylinder in upright position. For cylinders equipped

with a dip tube, charge Puron units with cylinder in upright position and a commercial metering device in manifold hose.

Charge refrigerant into suction-line.

TROUBLESHOOTING

Refer to the Troubleshooting-Cooling chart (Table 9) for troubleshooting information.

Page 23

AIRCONDITIONERWITHPURON(R-410A)QUICKREFERENCEGUIDE

Puronrefrigerantoperatesat50-70percenthigherpressuresthanR-22.Besurethatservicingequipmentandreplacementcomponentsare designedtooperatewithPuron.Puronrefrigerantcylindersarerosecolored.

•Puron refrigerant cylinders manufactured prior to March 1, 1999, have a dip tube that allows liquid to flow out of cylinder in upright position. Cylinders manufactured March 1, 1999 and later DO NOT have a dip tube and MUST be positioned upside down to allow liquid to flow.

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

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

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

•Use hoses with 750 psig service pressure rating.

•Leak detectors should be designed to detect HFC refrigerant.

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

•Vacuum pumps will not remove moisture from oil.

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

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

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

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

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

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

•Do not use an R-22 TXV.

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

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

•Always replace filter drier after opening system for service.

•Do not vent Puron into the atmosphere.

•Observe all warnings, cautions, and bold text.

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

Page 24

Table 9 - Troubleshooting Chart

SYMPTOM

Compressor and outdoor fan will not start

Compressor will not start but condenser fan runs

Three-phase scroll compressor (50XP030-060)

makes excessive noise and there may be a low pressure differential

Compressor cycles (other than normally satisfy- ing thermostat)

Compressor operates continuously

CAUSE

Power Failure Fuse blown or circuit breaker tripped

Defective thermostat, contactor, transformer, con-

trol relay, high pressure or loss-of-charge switch

Insufficient line voltage

Incorrect or faulty wiring

Thermostat setting too high

Faulty wiring or loose connections in compressor

circuit

Compressor motor burned out, seized, or internal

overload open

Defective run/start capacitor, overload, start relay

One leg of 3-phase power dead

Scroll compressor is rotating in the wrong direction

Refrigerant overcharge or undercharge

Defective compressor

Insufficient line voltage

Blocked condenser

Defective run/start capacitor, overload or start relay

Defective thermostat

Faulty condenser-fan motor or capacitor

Restriction in refrigerant system

Dirty air filter Unit undersized for load

Thermostat set too low

REMEDY

Call power company

Replace fuse or reset circuit breaker

Replace component

Determine cause and correct

Check wiring diagram and rewire correctly

Lower thermostat setting below room temperature

Check wiring and repair or replace

Determine cause. Replace compressor

Determine cause and replace

Replace fuse or reset circuit breaker. Determine

cause Correct the direction of rotation by reversing two

of the 3-phase power leads to the unit. Shut down unit to allow pressures to equalize

Recover refrigerant, evacuate system, and re-

charge to capacities shown on nameplate

Replace and determine cause

Determine cause and correct

Determine cause and replace

Replace thermostat

Replace

Locate restriction and remove

Replace filter

Decrease load or increase unit size

Reset thermostat

Excessive head pressure

Head pressure too low

Excessive suction pressure

Suction pressure too low

Low refrigerant charge

Air in system

Condenser coil dirty or restricted

Dirty air filter Dirty condenser coil

Refrigerant overcharged

Air in system

Condenser air restricted or air short-cycling

Low refrigerant charge Restriction in liquid tube

High Heat load Refrigerant overcharged

Dirty air filter Low refrigerant charge

Metering device or low side restricted

Insufficient evaporator airflow

Temperature too low in conditioned area

Outdoor ambient below 55°F (13°C)

Field-installed filter-drier restricted

Locate leak, repair, and recharge

Recover refrigerant, evacuate system, and re-

charge Clean coil or remove restriction

Replace filter

Clean coil

Recover excess refrigerant

Recover refrigerant, evacuate system, and re-

charge Determine cause and correct

Check for leaks, repair and recharge

Remove restriction

Check for source and eliminate

Recover excess refrigerant

Replace filter

Check for leaks, repair and recharge

Remove source of restriction

Increase air quantity Check filter - replace if nec-

essary

Reset thermostat

Install low-ambient kit

Replace

Page 25

START-UP CHECKLIST

(Remove and Store in Job File)

I. Preliminary Information MODEL NO.: SERIAL NO.:

DATE: TECHNICIAN:

II.

PRE-START-UP (Insert check mark in box as each item is completed) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

()

REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS

()

CHECK ALL ELECTRICAL CONNECTIONS AND TERMINAL FOR TIGHTNESS

() ()

CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE VERIFY THAT UNIT INSTALLATION IS LEVEL

()

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

()

III. START-UP ELECTRICAL

SUPPLY VOLTAGE COMPRESSOR AMPS

INDOOR (EVAPORATOR) FAN AMPS TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR ELECTRIC HEAT SUPPLY AIR

PRESSURES

REFRIGERANT SUCTION REFRIGERANT DISCHARGE

( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS *Measured at suction inlet to compressor. J-Measured at liquid line leaving condenser.

IV. EASY SELECT SETTINGS FULL UNIT MODEL NUMBER:

ENTER AVAILABLE HEAT SETTINGS ENTER AVAILABLE AIRFLOW HEAT AIR PIN CONNECTION SETTING

TYPE PIN CONNECTION SETTING ADJUST PIN CONNECTION SETTING

(0/0 or 0/90 for gas/electric models) CONTINUOUS FAN PIN CONNECTION SETTING

EASY SELECT

Heat Settings

DB WB

PSIG SUCTION LINE TEMP*

PSIG DISCHARGE TEMPi-

AC I

Norm I

o/9o [

Lo [

AC HI_ Size

System Type I

HP-Comfort I HP EFF

AC/HP CFM Adjust

Lo I Hi

On/Off Delay

3O/_O/O J ENH

Med J Hi

Page 26

Manufacturer reserves the right to change, at any time, specification8 and design8 without notice and without obligations,

Catalog No:5OXP-04SI

Replaces: 50XP-3SI