CARRIER Package Units(both Units Combined) Manual L0801131

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

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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 ........................ 1

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

RECEIVING AND INSTALLATION ................ 2-12

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 ................................ 6

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

Inspection ..................................... 6

Use of Rigging Bracket ........................... 6

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

Install Flue Hood .................................. 8

Install Gas Piping ................................. 9

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

Configuring Units for Downflow (Vertical)

Discharge ..................................... 9

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

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

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

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

Heat Anticipator Setting ......................... 12

Transformer Protection .......................... 12

PRE-START-UP .................................. 12

START-UP AND TROUBLESHOOTING ........... 12-19

Check for Refrigerant Leaks ........................ 12

Start-Up Heating & Make Adjustments ............... 13

Check Heating Control .......................... 13

Check Gas Input ............................... 13

Adjust Gas Input ............................... 13

Check Burner Flame ............................ 14

Airflow and Temperature Rise ..................... 14

Heating Sequence of Operation .................... 14

Limit Switches ................................ 18

Rollout Switch ................................ 18

Start-Up Cooling & Make Adjustments ............... 18

Checking Cooling Control Operation ............... 18

Checking & Adjusting Refrigerant Charge ........... 18

Indoor Airflow and Airflow Adjustments ............ 19

Cooling Sequence of Operation .................... 19

MAINTENANCE ............................... 23-25

Air Filter ....................................... 23

Indoor Blower and Motor .......................... 23

Flue Gas Passageways ............................. 23

Induced Draft (Combustion Air) Blower ............... 24

A99338

Fig. 1 - Unit 48SD

(Low NOx Model Available)

Limit Switch .................................... 24

Burner Ignition .................................. 24

Main Burners ................................... 24

Outdoor Coil, Indoor ('oil, & Condensate Drain Pan ..... 24

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

Electrical Controls and Wiring ...................... 25

Refrigerant Circuit ................................ 25

Indoor Airflow . ................................. 25

Metering Devices-

Thermostatic Expansion Valve .................... 25

AccuRater _" Piston ............................. 25

Liquid Line Strainer .............................. 25

TROUBLESHOOTING .......................... 25-27

START-UP CHECKLIST ........................... 25

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be hazardous due to

mechanical and electrical components. Only trained and qualified

personnel should install, repair, or service this equipment.

Untrained personnel can perform basic maintenance functions such

as cleaning and replacing air filters. All other operations must be

performed by trained service personnel. When working on this

equipment, observe precautions in the literature, on tags, and on

labels attached to or shipped with the unit and other safety

precautions that may apply.

Follow all safety codes. Installation must be in compliance with

local and national building codes. Wear safety glasses, protective

clothing, and work gloves. Have fire extinguisher available. Read

these instructions thoroughly and follow all warnings or cautions

included in literature and attached to the unit.

Recognize safety information. This is the safety-alert symbol _.

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

be alert to the potential for personal injury. Understand these signal

words: DANGER. WARNING. and CAUTION. These words are

used with the safety-alert symbol. DANGER identifies the most se-

rious 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 en-

hanced installation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect

switch. Turn off accessory heater power switch if applicable.

FIRE, EXPLOSION, ELECTRICAL SHOCK AND

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury

or unit damage.

A qualified installer or agency must use only

factory-authorized kits or accessories when modifying this

product.

PERSONAL INJURY AND ENVIRONMENTAL

HAZARD

Failure to relieve system pressure could result in personal

injury and/or death.

1. Relieve pressure and recover all refrigerant before servicing

existing equipment, and before final unit disposal. Use all

service ports and open all flow-control devices, including

solenoid valves.

2. Federal regulations require that you do not vent refrigerant

into the atmosphere. Recover during system repair or final unit

disposal.

INTRODUCTION

The 48SD unit (see Fig. 1) is a fully self-contained, combination

Category I gas heating/electric cooling unit designed for outdoor

installation (See Fig. 3 and 4 for unit dimensions). All unit sizes

have return and discharge openings for both horizontal and

downflow configurations, and are factory shipped with all

downflow duct openings covered. Units may be installed either on

a rooftop, a cement slab, or directly on the ground if local codes

permit (See Fig. 5 for roof curb dimensions).

Models with an N in the fifth position of the model number are

dedicated Low NOx units designed for California installations.

These models meet the California maximum oxides of nitrogen

(NOx) emissions requirements of 40 nanograms/joule or less as

shipped from the factory and must be installed in California Air

Quality Management Districts or any other regions in North

America where a Low NOx rule exists.

NOTE: Low NOx requirements apply only to natural gas

installations.

RECEIVING AND INSTALLATION

Step 1--Check Equipment

IDENTIFY UNIT

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

information 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. 5). Install insulation, cant strips, roofing, and

flashing. Ductwork must be attached to curb.

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

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

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

and poor unit performance.

Curb should be level to within 1/4 in. (6.4 mm). This is necessary

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

installation instructions for additional information as required.

SLAB MOUNT

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

in. (102 mm) thick with 2 in. (51 mm) above grade (See Fig. 2). 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 rec uired by local codes.

EVAR COIL COND. COIL

c9g096

Fig. 2 - Slab Mounting Details

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--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.

.=.

86 1

i339]

406 5

116 OO]

OUiDOOR

_79R 5 -

[3i4_i

_\ _42 7

19 0[675i R PT

X??O GEEP

G31 O

[3272}

168)

_S26

i i [12 85]

12 85

LEFT SIDE VIEW

i i OTROORCOiLQ

NROOR COiL _

TOP VIEW

11939

[4TONi

,c_, , i

. J

1 nJ

- X

COMPRESSOR, GLOWER, GAG PARTI110N _

& ELSCTRICAL ACCESS PANEL

12263

[48 2G]

FRONTVIEW

=A'

ELECTRKAL I UNiT WT I UM]I MEiGH] I CENTER O_ GRAVITY MM/iN i

UN!T CHARACTERISTICS i LG I _G 'A'_ I _ T 2

L 4ESGO]BO40 ................... ...... lg41414_O] 59181233] 40391159] 3937[1551 i

486D024040/060 208/230 1 60 i 343 Ii56 5080[20 Oi 43181170] 447 0[/7 5] ]

48SDO30040/060

805

i {3 i71

_53 3

[6 D4}

REQ_RED CLEARANCES TO COMBUSTIBLE MATL.

M_[L/_ETERS I/N]

toP OF UNIT ........................................... 3§56 [i4OD]

GUCT SIDE OF UNIT 608 _2 DO]

G!GE ORPOS]IE I)GC;S ............................ 3556 _14 oR]

BOTTOM Of UNiT ........................... BOO [OOO]

FiOE PANEL 9i4 4 i36 OOi

NEC. REOUIRED CLEARANCE& _[[LIMETERS [IN]

RETW6EN URNS, PO_ER ENTRY SiD6 ................... IR668 142D0]

UNIT AND _RGROUNDED SURFACES, POWER ENTRY SIDE 914 O i36 OR]

MN_] AND BLOCK OR CO_CREiE WALLS ANG OTHER

GROUNDED SURFACES, POWER ENTRY SiDE .......... 1066¸8 _4200]

REO_RED CLEARANCE FOR OPERATION AIED SERE_IN6

_IL[_ETERS [IN]

EVAP COIL ACCESS SIGE ............................. 9140 _36 oR]

POWER ENTRY SiDE .......................... ID668 14200]

{EXCEPT FOR NEC REOUINE_ENTS)

MNiT TOP .............................................. _2162 _GOo]

SiDE OPPOSITE DMCTS......... 914 6 i36RO]

GUCT ?ANEi ........................... 304¸8 i12061_

_M_NIMU_ GISTANCES:I£ UNN #S PLACED LESS THAN 304 8 [i2 OO] £RO_ WALL

SYGTE_THEN SYSTEM PERTOR_AMGE MAYBE GO_PROMiSEG

DIMENSIONS [N El ARE [N iNCHES

_116 S

[4 581

G221088i G_A NOIE-\

CONTROL ENTRY \

i23 8

[4871

N 456¸2

[1796]

313 0

[/232]

4_ 8

[184]

628

[2 OGi

i22 2

[4 G1]

RIGHTSIDEVIEW

13481

RETURN

GMGT

2496 _ _ 2496

_9 831 i9 831

REAR VIEW

-I

o6 6

16 01]

OLI O00R --80 5

i [3 17]

II}S

{6 851

[] iNDOOR (CiL_ t _\

\ OUTDOOR COIL

TOP VIEW

1_96 6

{4_ 941

Fi[LD _I4TRI ¸

STITV[Cii PORi

I I .,_\: %°

620 2

[24 42]

{i68}

[i 95

{44 22]

................................................/i_3 9 ................................................

[47 00]

= ' {4 54i

i 2}0

j [0 9/i

{4 8,11

•i'"'

-_ 12263 "4

{46 26]

LEFT SIDE VIEW FRONT VIEW

REOUIRED CLEARANCES TO COP,_US'RBLE MATL IM q !1

1)1 Of N/ 35 6 4 0"1

0¢I S 4 0N I ................. :_08 ;00]

S!O[ 0 051 E L{TS .......... 356 14 00]

BOTO_ OF NT ............................. 0 00 0el]

UE PD!_EI I_ 4 56 DO]

NCC. REOUIRBO CLEARANCES.

L M I]

[ & H WI S [8_'[R HTR 68 ........ n66 6 4F )]

'_ T At U!GROW@ B UR;AC S, CWR q ! ...... 914. 36 00]

'/ T Af8 800{ O ':O'/¢P [ _/'A 8 q@ O [R

':)U/Oi S:.</,I iO_i I'/HY 6]1 i06_, 8 I} I

REOUIRED CLEARANCE FOR OPERATION AND SERVICING !, I M F S f]

OL ASS I E..................... 014 0 fl I:'0]

Ol_[ E R/ SI E ...... I(,6¢ 8 42 0 ]

( >6 I I E N i O[ I I I t411 I 6

I'9 ,8 i I

S['{ Of 18S/ ( tC S 40;36 001

8UCT [A[I ....................... 08 i2 68 _

II t !4W< DIST#NCES IF U T S PL&CED LESS TH_ 3848 [12 00] fROM _NALL

SY6i[!_ lHi_ 8 S I i_ilTIORMANCi _kAYS[ COMPITOf4iSED

IM[NS_O_5 i '_ [] A[[ i_ i!CIIS

28 61i 13] )IA K 0 -_

[8 26]

[}4}]

--3:,i _TI_

f/38}

REAR VIEW

f[ tlii

I)b(:

OFEIJi!i6

J i _ L_

S47 3 _'

i13 62} _351 2

[13 83]

HVAOunit

/(NOTE A) _11

/0,=4

' Wood nailer*

/Flashing field

I_I::!i:_ _nsulati°9 (field

I Roofing rr, aterial It_-;!_'YII sopp,,ed>

/ '_e'ds_Pp"e_- lC_J:!IIIL

Roof Curb for SmMI Cabinet

Note A: When unit mounting screw is used,

retainer bracket must also be used.

/ ,,,_%w _.<_

i 1tl

' Wood nailer*

/Elasl_ing field _od nailer*

IY_ /lnsulati£9 (f!eld

\ field -- -II: iitllL

Roof Curb for Large Cabinet

Note A: When unit mounting screw is used,

retainer bracket must also be used.

Retu n opel_lrlg

(BXO)

Long

SuppoEt

Short

Support

R/A

\\ _Gasket around

\\ duct

S/A

Insulated Gasket around

deck pan outer edge X

UNIT SIZE

48SD018-036

48SD042-060

NOTES:

ODS CATALOG A B

NUMBER IN. (aM) IN. (aM)

CPRFCURBOO6AOO 8 (203) 11 (279)

CPRFCURBOO7AOO 14 (356) 11 (279)

CPRFCURBOO8AOO 8 (203) 16-3/18 (411)

CPRFCURBOO9AOO 14 (356) 16-3/16 (411)

[. Roof curb lnust be set tip for ullit being installed.

IN. (MM)

16-1/2 (419)

17-3/8 (441)

IN. (MM)

28-3/4 (730)

40-1/4 (1022)

IN. (MM)

30-3/8 (771)

41-15/16 (1065)

41-15/18 (1065)

IN. (MM)

44-5/16 (1126)

44-7/16 (1129)

A05308

iN.(MM)

45-15/16 (1167)

48 - 1/18 (1169)

46-1/18 (1169)

2. Seat strip nlusr be applied, as required, to unit being installed.

3. Dimensions are in inches.

4. Dimension in ( ) are in millimeters.

5. Roof curb is made of 16 gauge steel.

6. Attach dtlctwork to curb (flanges of duct rest oi1 ctlrb),

7. Inadated panels: I in. (25 ram) thick fiberglass 1 lb. density.

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

conditions. This bracket is available through Micrometl.

Fig. 5 -Roof Curb Dimensions

Step 4--Provide Clearances

The required minimum operating and service clearances are shown

in Fig. 3 and 4. Adequate combustion, ventilation and condenser air

must be provided in accordance with section 5.3. Air for

Combustion and Ventilation, of the National Fuel Gas Code ANSI

(American National Standards Institute) Z223.1 or applicable

provisions of local building code. In Canada. follow sections 7.2,

7.3, or 7.4 or Can/CGA (Canadian Gas Association) B149

Installation Codes or applicable provisions of local building code.

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.

The condenser fan pulls air through the condenser coil and

discharges it through the top grille. 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 48-in. (1219 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 or other combustible materials. Slab-mounted units

should be at least 4 in. (102 mm) above the highest expected water

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

Step 5--Rig and Place Unit

Rigging and handling of this equipment can be hazardous for many

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

etc.).

Only trained, qualified crane operators and ground support staff

should handle and install this equipment.

When working with this equipment, observe precautions in the

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

any other safety precautions that might apply.

Training for operators of the lifting equipment should include, but

not be limited to. the following:

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

lifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.

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

kit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and work

gloves.

INSPECTION

The lifting/rigging bracket is engineered and designed to be

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

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

elevated structures.

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

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

must not be used and should be discarded.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

Rigging brackets for one unit use only. When removing a

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

USE OF RIGGING BRACKET

Field Installation of Ri_in_ Bracket (if not already installed)

1. Remove unit from shipping carton. Leave top shipping skid

on the unit for use as a spreader bar to prevent the rigging

straps from damaging the unit. If the skid is not available, use

a spreader bar of sufficient length to protect the unit from

damage.

2. Remove 4 screws in unit corner posts.

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

rain lip (See Fig. 6). Use the screws removed in step 2 above

to secure the brackets to the unit.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

Rigging bracket MUST be under the rain lip to provide

adequate lifting.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury/death or property damage.

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

stripped, replace the stripped one with a larger diameter screw

(included). When straps are taut, the clevis should be a

minimum of 36 in. (914 mm) above the unit top cover.

Ri_,_in_/Liftin_ of Unit

1. Bend top of brackets down approximately 30 degrees from

the corner posts.

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

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

weight of the unit (See Fig. 6).

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

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

with the ground.

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

the top crating, remove corner post screws and rigging brackets,

then re-install screws.

UNIT FALLING HAZARD

Failure to follow this warning could result in personal injury

or death.

Never stand beneath rigged units or lift over people.

Table1--Physical Data - Unit 48SD

UNIT SIZE 486D

NOMINAL CAPACITY (ton)

OPERATING WEIGHT (Ib)

(kg)

COMPRESSORS

REFRIGERANT (R-22)

Quantity (Ib)

(kg)

REFRIGERANT METERING DEVICE

Orifice ID (in.)

Part Number

CONDENSER COIL

Rows--Fins/in.

Face Area (sq ft)

CONDENSER FAN

Nominal Cfm

Diameter (in.)

Motor Hp

(Rpm)

EVAPORATOR COiL

Rows--Fins/in.

Face Area (sq ft)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Size (ram)

Motor Hp

(RPM)

FURNACE SECTION*

Burner Orifice No. (Qty--Dril[ Size) Natural Gas

Burner Orifice No, (Qty--Drill Size) Propane

RETURN-AIR FILTERS Throwaway (in.)T

(mm)

018040

290

132

Scroll

TXV

EA36YD097

024040 024060 030040

2 2 2-1/2

343 343 355

158 156 158

5.9 59 5.0

2.7 27 2.7

0.065 0.055 0070

030060 036060 036090 042060 042090

2-1/2 33 3-1/2 3-1/2

355 360 360 450 450

156 163 163 204 204

Scroll

80 L 72 7.2 78 I7.8

27 33 3.3 35 3.5

Aoou ater

0.070 0080 0080 0.084 0084

121 221 221 221 2.21 2..21 221 221 221

13.8 102 102 11.9 119 113.8 13.6 194 19.4

2200 2200 2200 2800 2800 3000 3000 3500 3500

22 22 22 22 22 22 22 22 22

1/8 _25) 1/8 (825) 1/8 (825) 1/8 (825) 1/8 (825) 1/8 _25) 1/8 (825) 1/8 (825) 1/8 (825)

317 317 317 317 317 417 417 317 317

37 3.7 37 3.7 37 37 3.7 47 4.7

600 800 800 1000 1000 1200 1200 1400 1400

10x10 10x10 1OxlO 10xlO 10x10 10x10 10xlO 11x10 11x10

254x254 254x254 254x254 254x254 254x254 254x254 254x254 279x254 279x254

1/4 _25) 1/3 (1050) 1/3 (1050) 1/3 (1050) 1/3 (1050) 1/2 (1000) 1/2 (1000) 1/2 (1075) 1/2 (1075)

244

250

2_44 2.88 2..44 2_38 238 3_38 2.88 3.33

2...50 2.48 2..50 2..48 246 3..46 2.48 3.46

20x20x1 24x30x1

508x508x25 610x752x25

UNIT SIZE 48SD

NOMINAL CAPACITY (ton)

OPERATING WEIGHT (Ib)

COMPRESSORS

REFRIGERANT (R-22)

Quantity (Ib)

(kg)

HEI-RIGERANT METERING DEVICE

Orifice ID (in,)

CONDENSER COIL

Rows--Fins/in,

Face Area (sq ft)

CONDENSER PAN

Nominal Cfm

Diameter (in.)

Motor Hp (Rpm)

EVAPORATOR COIL

Rows--Fins/in,

Face Area (sq ft)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Size (mm)

Motor Hp (RPM)

FURNACE SECTION _

Burner Orifice No, (Qty--Drill Size) Natural Gas

Burner Orifice No. (Qty--Drill Size) Liquid Propane

RETURN-AIR I-ILTERS Throwaway

(in.)f

(ram)

048090 048115

4 4

480 480

218 218

12.4 12.4

5.6 5.6

048130 060090 060115 060130

4555

480 484 484 484

218 220 220 220

Scroll

12.4

5.6

AccuHater

0.088 0.088 0.088 0.098 0.098 0.098

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

19.4 19.4 19.4 19.4 19.4 19.4

3500 3500 3500 4200 4200 4200

22 22 22 22 22 22

1/4 (t100) 1/4 (t100) 1/4 (1100) 1/4 (1100) 1/4 (t100) 1/4 (1100)

3...17

5.7

3...17

5.7

1600

11x10

279x254

1/2 (1075)

1600

11x10

279x254

1/2 (1075)

3...17

5.7

1600

11xl 0

279x254

1/2 (1075)

12.0 12.0

5.4 5.4

4...17

5.7

1750

11x10

279x254

1 (1040)

4...17

5.7

1750

11x10

279x254

1(1040)

12.0

5.4

4...17

5.7

1750

11x10

279x254

I(1040)

3...38 3...33 3...31 3...38 3...33 3...31

3...46 3...42 3...41 3...46 3...42 3...41

24x36x1

610x914x25

LEGEND

* Based on attitude of 0 to 2000 feet (0 to 810 m).

Required filter sizes on shown are based on the larger of the ARI (Air Conditioning and Refrigeration institute) rated cooling airflow or the heating airflow

velocity of 800 ft/min for throwaway type or 450 ft/min for high-capacity type, Air filter pressure drop for non-standard filters must not exceed 0,08 in, wc.

C00070b

SEE DETAIL

DETAIL A

CORNER WEIGHTS (SMALL CABINET)

018 024 030 036

Unit Unit

Ib kg Ib kg Ib kg Ib kg

Unit Only 290 132 343 156 355 161 360 163 Unit Only

Weight Weight

Corner Weight 75 34 69 31 75 34 74 34 Corner Weight

1 1

Corner Weight 62 28 53 24 56 25 55 25 Corner Weight

2 2

Corner Weight 97 44 83 38 81 37 86 39 Corner Weight

3 3

Corner Weight 56 25 138 63 143 65 145 66 Corner Weight

4 4

Rigging Weight 309 140 353 160 365 166 370 168 Rigging Weight

Shipping 344 156 383 173 395 179 400 181 Shipping

Weight Weight

MINIMUMHEIGHT: 36'

UNITHEIGHT

A05161

CORNER WEIGHTS (LARGE CABINET)

042 048 060

Ib kg Ib kg lb kg

450 204 480 218 484 220

90 41 97 44 98 45

72 33 74 34 75 34

110 50 116 53 118 54

178 81 193 88 193 88

465 211 495 225 499 226

510 231 540 245 544 247

Fig. 6 - 48SD Unit Corner Weights and Suggested Rigging

Step 6--Connect Condensate Drain

NOTE: When installing condensate drain connection be sure to

comply with local codes and restrictions.

Model 48SD disposes of condensate water through a 3/4 in. NPT

fitting which exits through the base on the evaporator coil access

side. See Fig. 3 & 4 for location.

Condensate water can be drained directly onto the roof in rooftop

installations (where permitted) or onto a gravel apron in ground

level installations. Install a field-supplied 2-in. condensate trap at

the end of condensate connection to ensure proper drainage. Make

sure that the outlet of the trap is at least i in. (25 mm) lower than the

drain-pan condensate connection to prevent the pan from

overflowing (See Fig. 7). Prime the trap with water. When using a

gravel apron, make sure it slopes away from the unit.

TRAP

OUTLET

C00009

Fig. 7 -Condensate Trap

Connect adrain tube using aminimum of 3/4-in. PVC or 3/4-in.

copper pipe (all field-supplied) at tire outlet end of the 2-in. trap.

Do not undersize the tube. Pitch the drain tube downward at a slope

of at least 1-in. (25 mm) for every 10 ft (3 m) of horizontal run. Be

sure to check the drain tube for leaks.

Step 7--Install Flue Hood

The flue assembly is secured and shipped in the return air duct.

Remove duct cover to locate the assembly (See Fig. 9 and 10).

NOTE: Dedicated low NOx models MUST be installed in

California Air Quality Management Districts where a Low NOx

rule exists.

These models meet the California maximum oxides of nitrogen

(NOx) emissions requirements of 40 nanograms/joule or less as

shipped from the factory.

NOTE: Low NOx requirements apply only to natural gas

installations.

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury

or death.

The venting system is designed to ensure proper venting. The

flue hood assembly must be installed as indicted in this section

of the unit installation instructions.

Install the flue hood as follows:

1. This installation must conform with local building codes and

with the National Fuel Gas Code (NFGC), ANSI Z223.1 (in

Canada, CAN/CGA B149.1, and B149.2) or NFPA

(National Fire Protection Association) latest revision. Refer

to Provincial and local plumbing or wastewater codes and

other applicable local codes.

2. Remove flue hood from shipping location (inside the return

section of the blower compartment-see Fig. 9 & 10). Re-

move the return duct cover to locate the flue hood. Place flue

hood assembly over flue panel. Orient screw holes in flue

hood with holes in the flue panel.

3. Secure flue hood to flue panel by inserting a single screw on

the right side and the left side of the hood.

Step8---InstallGas Piping

The gas supply pipe enters the unit through the access hole

provided. The gas connection to the unit is made to the 1/2-in. FPT

gas inlet on the gas valve.

Install a gas supply line that runs to the heating section. Refer to

Table 2 and the NFGC for gas pipe sizing. Do not use cast-iron pipe.

It is recommended that a black iron pipe is used. Check the local

utility for recommendations concerning existing lines. Size gas

supply piping for 0.5 in. wc maximum pressure drop. Never use

pipe smaller than the 1/2-in. FPT gas inlet on the unit gas valve.

For natural gas applications, the gas pressure at unit gas connection

must not be less than 4.0 in. wc or greater than 13 in. wc while the

unit is operating. For propane applications, the gas pressure must

not be less than 7.0 in. wc or greater than 13 in. wc at the unit

connection.

A 1/8-in. NPT plugged tapping, accessible for test gauge

connection, must be installed immediately upstream of the gas

supply connection to the gas valve.

When installing the gas supply line, observe local codes pertaining

to gas pipe installations. Refer to the NFGC ANSI Z223.1-2005

NFPA latest edition (in Canada, CAN/CGA B149.1).

NOTE: In the state of Massachusetts:

1. Gas supply connections MUST be performed by a licensed

plumber or gas fitter.

2. When flexible connectors are used. the maximum length

shall not exceed 36 inches (915 mm).

3. When lever handle type manual equipment shutoff valves

are used. they shall be T-handle valves.

4. The use of copper tubing for gas piping is NOT approved by

the state of Massachusetts.

In the absence of local building codes, adhere to the following

pertinent recommendations:

1. Avoid low spots in long runs of pipe. Grade all pipe 1/4 in.

(6.4 ram) for every 15 ft (5 m) of length to prevent traps.

Grade all horizontal runs downward to risers. Use risers to

connect to heating section and to meter.

2. Protect all segments of piping system against physical and

thermal damage. Support all piping with appropriate straps,

hangers, etc. Use a minimum of one hanger every 6 ft. (1.8

m). For pipe sizes larger than 1/2 in. (13 mm), follow

recommendations of national codes.

3. Apply joint compound (pipe dope) sparingly and only to

male threads of joint when making pipe connections. Use

only pipe dope that is resistant to action of liquefied

petroleum gases as specified by local and/or national codes.

Never use Teflon tape.

4. Install sediment trap in riser leading to heating section (See

Fig. 8). This drip leg functions as a trap for dirt and

condensate.

5. Install an accessible, external, manual main shutoffvalve in

gas supply pipe within 6 ft (1.8 m) of heating section.

6. Install ground-joint union close to heating section between

unit manual shutoff and external manual main shut-off

valve.

7. Pressure test all gas piping in accordance with local and

national plumbing and gas codes before connecting piping

to unit.

NIPPLE

CAP

099020

Fig. 8 - Sediment Trap

NOTE: Pressure test the gas supply system after the gas supply

piping is connected to the gas valve. The supply piping must be

disconnected from the gas valve during the testing of the piping

systems when test pressure is in excess of 0.5 psig. Pressure test the

gas supply piping system at pressures equal to or less than 0.5 psig.

The unit heating section must be isolated from the gas piping system

by closing the external main manual shutoff valve and slightly

opening the ground-joint union.

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal injury,

death and/or property damage.

-Connect gas pipe to unit using a backup wrench to avoid

damaging gas controls.

-Never purge a gas line into a combustion chamber. Never test

for gas leaks with an open flame. Use a commercially available

soap solution made specifically for the detection of leaks to

check all connections.

-Use proper length of pipe to avoid stress on gas control

manifold.

-If a flexible connector is required or allowed by authority

having jurisdiction, black iron pipe shall be installed at furnace

gas valve and extend a minimum of 2 in. (51 mm) outside

furnace casing.

-If codes allow a flexible connector, always use a new

connector, do not use a connector which has previously

serviced another gas appliance.

8. Check for gas leaks at the field-installed and

factory-installed gas lines after all piping connections have

been completed. Use soap-and-water solution (or method

specified by local codes and/or regulations).

Step 9---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 connects to the roof curb (See Fig. 3 and 4 for connection

sizes and locations).

CONFIGURING UNITS FOR DOWNFLOW (VERTICAL)

DISCHARGE

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect

switch.

Table2--MaximumGasFlowCapacity*

NOMINAL INTERNAL LENGTH OF PIPE (FT)t

IRON PIPE DIAMETER

SIZE (IN.) (IN.) 10 20 30 40 50 60 70 80 90 100 125 150 175 200

1/2 .622 175 120 97 82 73 66 61 57 53 50 44 40

3/4 .824 360 250 200 170 151 138 125 118 110 103 93 84 77 72

1 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135

1-1/4 1.380 1400 950 770 600 580 530 490 460 430 400 360 325 300 280

1-1/2 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430

Capacity of pipe in cu ft of gas per hr for gas presalre of 0.5 psig or tess. Pressure drop of 0,5 in, wc (based on a 0.60 specific gravity gas). Refer to Table, National Fire Prolec

tion Association NFPA 54.

This length includes an ordinary number of fittings.

1. Open all electrical disconnects before starting any service

work.

2. Remove horizontal (metal) duct covers to access vertical

(down flow) discharge duct knockouts in unit base.

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

bottom of the unit base (See Fig. 10).

4. If unit ductwork is to be attached to vertical opening flanges

on the unit base (iackstand applications only), do so at this

time.

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in property damage.

Collect ALL screws that were removed. Do not leave screws

on rooftop as permanent damage to the roof may occur.

5. It is recommended that the base insulation around the

perimeter of the vertical return-air opening be secured to the

base with aluminum tape. Applicable local codes may

require aluminum tape to prevent exposed fiberglass.

6. Coverbothhorizontalductopeningswiththe )rovidedduct

covers. 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.

.........................7......

SUPPLY RETURN VENT HOOD

DUCT DUCT SHIPPING

OPENING OPENING LOCATION

A05143

Fig. 9 -Supply and Return Duct Opening

DUCT COVERS REMOVED

Fig. 10 - Vertical Duct Cover Removed

C99012

Adhere to the following criteria when selecting, sizing, and

installing the duct system:

1. Units are shipped for horizontal duct installation (by

removing duct covers).

2. Select and size ductwork, supply-air registers, and

return-air grilles according to American Society of Heating,

Refrigeration and Air Conditioning Engineers (ASHRAE)

recommendations.

3. Use flexible transition between rigid ductwork and unit to

prevent transmission of vibration. The transition may be

screwed or bolted to duct flanges. Use suitable gaskets to en-

sure weather-tight and airtight seal.

4. 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.

5. 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.

6. 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) minimum installation standards for

heating and air conditioning systems. Secure all ducts to

building structure.

7. Flash. weatherproof, and vibration isolate all openings in

building structure in accordance with local codes and good

building practices.

Step10--Install Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

The unit cabinet must have an uninterrupted, unbroken

electrical ground. This ground may consist of an electrical

wire connected to the unit ground screw in the control

compartment, or conduit approved for electrical ground when

installed in accordance with NEC, ANSI/NFPA American

National Standards Institute/National Fire Protection

Association (latest edition) (in Canada. Canadian Electrical

('ode CSA C22.1) and local electrical codes.

UNIT 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 (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. On 3-phase

units, ensure phases are balanced within 2 percent. Consult

local power company for correction of improper voltage

and/or phase imbalance.

4. Insulate low-voltage 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

When routing power leads into unit, use only copper wire between

disconnect and unit. The high voltage leads should be in a conduit

until they enter the duct panel; conduit termination at the duct panel

must be watertight.

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.

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. 3 and 4 for acceptable

location).

See unit wiring label and Fig. 11 for reference when making high

voltage connections. Proceed as follows to complete the

high-voltage connections to the unit.

Single phase units:

1. Run the high-voltage (L1, L2) and ground lead into the

control box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line side

of the contactor.

4. Connect field L1 to black wire connected to 11 terminal of

the compressor contactor.

5. Connect field wire L2 to yellow wire connected to 23

terminal of the compressor contactor.

Three-phase units:

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

control box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line side

of the contactor, and blue wire from compressor.

4. Connect field L1 to black wire on connected to 11 terminal

of the compressor contactor.

5. Connect field wire L3 to yellow wire connected to 13

terminal of the compressor contactor.

6. Connect field wire L2 to blue wire from compressor.

SPECIAL PROCEDURES FOR 208-V OPERATION

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before making any wiring changes, make sure the gas supply

is switched off first. Then switch off the power supply to the

unit and install lockout tag.

CONTROL VOLTAGE CONNECTIONS

Do not use any type of power-stealing thermostat. [;nit 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 from the unit (as measured along the control voltage

wires), use no. 16 AWG color-coded, insulated (35°C minimum)

wires.

Standard Connection

Remove knockout hole located in the flue panel adjacent to the

control access panel (See Fig. 3 and 4). Remove the rubber grommet

from the installer's packet (included with unit) and install grommet

in the knockout opening. Provide a drip loop before running wire

through panel.

HIGH VOLTAGE tv - - -

POWER LEADS Ic e- ---

(SEE UNIT WIRING

LABEL) _:_ - - -

CONTROLBOX

LOW-VOLTAGE

POWER LEADS-

(SEE UNIT

WIRING LABEL)

[0-

I0-

SPLICE BOX

FIELD-SUPPLIED

FUSED DISCONNECT

]

TAT

® I/

A05144

Fig. 11 - High- and Control-Voltage Connections

Runthelow-voltageleadsfromthethermostat,throughtheinlet

hole,andintounitlow-voltagesplicebox(seeFig.13).

Locatefive18-gagewiresleavingcontrolbox.Theselow-voltage

connectionleadscanbeidentifiedbythecolorsred,green,yellow,

brown,andwhite(SeeFig.11).Ensuretheleadsarelongenough

toberoutedintothelow-voltagesplicebox(locatedbelowright

sideofcontrolbox).Routeleadsthroughholeinbottomofcontrol

boxandmakelow-voltageconnections(SeeFig.11).Secureallcut

wires,sothattheydonotinterferewithoperationofunit.

HEAT ANTICIPATOR SETTING

See thermostat instructions for anticipator and cycle rate setup

details.

NOTE: For thermostat selection purposes, use 0.18 amp for the

approximate required setting. Failure to make a proper heat

anticipator adjustment will result in improper operation, discomfort

to the occupants of the conditioned space, and inefficient energy

utilization; however, the required setting may be changed slightly

to provide a greater degree of comfort for a particular installation.

TRANSFORMER PROTECTION

The transformer is of the energy-limiting type. It is set to withstand

a 30-sec. overload or shorted secondary condition.

PRE- START- UP

FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

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.

To remove a component, wear protective goggles and

proceed as follows:

a. Shut off electrical power to unit and install lockout

tag.

b. Relieve and reclaim all refrigerant from system

using both high- and low-pressure ports.

c. Cut component connecting tubing with tubing

cutter and remove component from unit.

d. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to torch

flame.

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

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

1. Remove access panel.

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 damage, 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.

c. Leak-test all refrigerant tubing connections using

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

refrigerant leak is detected, see following Check for

Refrigerant Leaks section.

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

sure that connections are completed and tight.

e. Ensure wires do not touch refrigerant tubing or sharp

sheet metal edges.

f. Inspect coil fins. If damaged during shipping and

handling, carefully straighten fins with a fin comb.

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury,

death or property damage.

Do not purge gas supply into the combustion chamber. Do not

use a match or other open flame to check for gas leaks.

4. Verify the following conditions:

a. Make sure gas line is free of air. Before lighting the unit

for the first time, perform the following with the gas valve

in the OFF position:

NOTE: If the gas supply pipe was not purged before connecting the

unit, it will be full of air. It is recommended that the ground joint

union be loosened, and the supply line be allowed to purge until the

odor of gas is detected. Never purge gas lines into a combustion

chamber. Immediately upon detection of gas odor, retighten the

union. Allow 5 minutes to elapse, then light unit.

b. Make sure that condenser-fan blade is correctly

positioned in fan orifice. As a general rule, the top 1/3 of

condenser-fan blade should be within fan orifice venturi.

c. Ensure fan hub is positioned correctly with respect to

motor housing (See Fig. 12).

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

e. Make sure that condensate drain trap is filled with water

to ensure proper drainage.

f. Make sure that all tools and miscellaneous loose parts

have been removed.

MOTOR GRILLE

-q

1/8" MAX BETWEEN

MOTOR AND FAN HUB MOTOR SHAFT

Fig. 12 -Fan Blade Clearance

C99009

START-UP

Step 1--CHECK FOR REFRIGERANT LEAKS

Proceed as follows to locate and repair arefrigerant 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:Installafilterdrierwheneverthesystemhasbeenopened

forrepair.

3.AddasmallchargeofR-22refrigerantvaportosystemand

leak-testunit.

4.Recoverrefrigerantfromrefrigerantsystemandevacuateto

500micronsifnoadditionalleaksarefound.

5.ChargeunitwithR-22refrigerant,usingavolumetric

chargingcylinderoraccuratescale.Refertounitratingplate

forrequiredcharge.Besuretoaddextrarefrigerantto

compensateforinternalvolumeoffilterdrier.

STEP2--START-UPHEATINGANDMAKEADJUST-

MENTS

Completetherequiredproceduresgivenin thePre-Start-Up

sectionbeforestartingtheunit.Donotjumperanysafetydevices

whenoperatingtheunit.Makesurethatburnerorificesareproperly

aligned.Unstableoperationmyoccurwhentheburnerorificesin

themanifoldaremisaligned.

Followthelightinginstructionsontheheatingsectionoperation

label(locatedinsidetheburnerorbloweraccessdoor)tostartthe

heatingsection.

NOTE:Makesurethatgassupplyhasbeenpurged,andthatallgas

pipinghasbeencheckedforleaks.

LOWVOLTAGE

SPLICE BOX

CHECK HEATING CONTROL

Start and check the unit for proper heating control operation as

follows (see furnace lighting instructions located inside burner or

blower access panel):

1. Place room thermostat SYSTEM switch in the HEAT

position and the fan switch is placed in AUTO position.

2. Set the heating temperature control of the thermostat above

room temperature.

3. The induced-draft motor will start.

4. After a call for heating, the main burner should light within

5 sec. If the burners do not light, there is a 22-sec. delay

before another 5-sec. try. If the burners still do not light, this

sequence is repeated. If the burners do not light within 15

minutes from the initial call for heat, there is a lockout. To

reset the control, break the 24-v power to W.

5. The evaporator fan will turn on 45 sec. after the flame has

been established. The evaporator fan will turn off 45 sec.

after the thermostat has been satisfied.

CHECK GAS INPUT

Check gas input and manifold pressure after unit start-up (See Table

3). If adjustment is required proceed as follows:

• The rated gas inputs shown in Table 3 are for altitudes

from sea level to 2000 ft above sea level. These inputs are

based on natural gas with a heating value of 1050 Btu/ft 3

at 0.65 specific gravity, or propane gas with a heating

value of 2500 Btu/ft 3 at 1.5 specific gravity.

• For elevations above 2000 ft (610 m), reduce input 4%

for each 1000 ft (305 m) above sea level. For example at

2001 ft (610 m) a 12% total derate is required.

• When the gas supply being used has a different heating

value or specific gravity, refer to national and local codes.

or contact your distributor to determine the required

orifice size.

MANIFOLD I_IPEPLUG

Fig. 13 -Burner Assembly

A07568

BURNER FLAME

Fig. 14 - Monopoly Burner

C99021

UNIT DAMAGE HAZARD

Failure to follow this caution may result in reduced unit and/or

component life.

Do Not redrill an orifice. Improper drilling (burrs,

out-of-round holes, etc.) can cause excessive burner noise

and misdirection of burner flame. If orifice hole appears

damaged or it is suspected to have been redrilled, check orifice

hole with a numbered drill bit of correct size.

ADJUST GAS INPUT

The gas input to the unit is determined by measuring the gas flow

at the meter or by measuring the manifold pressure. Measuring the

gas flow at the meter is recommended for natural gas units. The

manifold pressure must be measured to determine the input of

propane gas units.

Measure Gas Flow (Natural Gas Units)

Minor adjustment to the gas flow can be made by changing the

manifold pressure. The manifold pressure must be maintained

between 3.4 and 3.6 in. wc.

If larger adjustments are required, change main burner orifices

following the recommendations of national and local codes.

NOTE: All other appliances that use the same meter must be turned

off when gas flow is measured at the meter.

Proceed as follows:

1. Turn off gas supply to unit.

HEATING INPUT

(BTUH)

NUMBER OF

ORIFICES

40,000 2

60,000 2

90,000 3

115,000 3

130,000 3

Min

4.0

Table 3--Heating Inputs

GAS SUPPLY PRESSURE (IN. WC)

Naturalt

Max

13.0

Propane*t

Min

4.0

Max

13.0

MANIFOLD PRESSURE (IN. WC)

Naturalt

3.5

Propane*t

3.5

3.4

3.7

3.5

When aunit is converted to propane, different size orifices must be used. See separate, natural to propane conversion kit instructions.

_Based oil altitudes from sea level to 2000 ft above sea level. For altitudes above 2000 ft, reduce input rating 4 percent fc_r each additional I000 ft above sea level, In Canada.

from 2000 ft above sea level to 4500 ft above sea level, @rate the unit I0 percent.

2. Remove pipe plug on manifold (See Fig. 13) and connect

manometer. Turn on gas supply to unit.

3. Recnrd number of seconds fnr gas meter test dial to make one

revolution.

4. Divide number of seconds in Step 3 into 3600 (number of

seconds in one hr).

5. Multiply result of Step 4 by the number of cubic feet (cu ft)

shown for one revolution of test dial to obtain cubic feet (cu

ft) of gas flow per hour.

6. Multiply result of Step 5 by Btu heating value of gas to

obtain total measured input in Btuh. Compare this value with

heating input shown in Table 3 (Consult the local gas

supplier if the heating value of gas is not known).

EXAMPLE: Assume that the size of test dial is 1 cu ft, one

revolution takes 32 sec, and the heating value of the gas is 1050

Btu/ft 3. Proceed as follows:

1. 32 sec. to complete one revolution.

2. 3600 + 32 = 112.5.

3. 112.5 x 1 =112.5 ft3 of gas flow/hr.

4. 112.5 x 1050 = 118,125 Btuh input.

If the desired gas input is 115.000 Btuh, only a minor change in the

manifold pressure is required.

Observe manifold pressure and proceed as follows to adjust gas

input:

1. Remove cover screw over regulator adjustment screw on gas

valve.

2. Turn regulator adjustment screw clockwise to increase gas

input, or turn regulator adjustment screw counterclockwise

to decrease input. Manifold pressure must be between 3.4

and 3.6 in. wc.

FIRE AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury

or death and/or property damage.

Unsafe operation of the unit may result if manifnld pressure is

outside this range.

3. Replace cover screw cap on gas valve.

4. Turn off gas supply to unit. Remove manometer from

pressure tap and replace pipe plug on gas valve. Turn on gas

to unit and check for leaks.

Measure Manifold Pressure (Propane Units)

The main burner orifices on a propane gas unit are sized for the unit

rated input when the manifold pressure reading matches the level

specified in Table 3.

Proceed as follows to adjust gas input on a propane gas unit:

1. Turn off gas to unit.

2. Remove pipe plug on manifold and connect manometer (See

Fig. 13).

3. Turn on gas to unit.

4. Remove cover screw over regulator adjustment screw on gas

valve.

5. Adjust regulator adjustment screw to the correct manifnld

pressure, as specified in Table 3. Turn adjusting screw

clockwise to increase manifold pressure, or turn adjusting

screw counterclockwise to decrease manifnld pressure.

6. Replace cover screw.

7. Turn off gas to unit. Remove manometer from pressure tap.

Replace pipe plug on gas valve, then turn on gas to unit.

Check for leaks.

CHECK BURNER FLAME

With burner access panel removed, observe the unit heating

operation. Watch the burner flames to see if they are light blue and

soft in appearance, and that the flames are approximately the same

for each burner. Propane will have blue flame (See Fig. 14). Refer

to the Maintenance section for information on burner removal.

AIRFLOW AND TEMPERATURE RISE

The heating section for each size unit is designed and approved for

heating operation within the temperature-rise range stamped on the

unit rating plate.

Table 8 shows the approved temperature rise range for each heating

input, and the air delivery cfm at various temperature rises. The

heating operation airflow must produce a temperature rise that falls

within the approved range.

Refer to Indoor Airflow and Airflow Adjustments section to adjust

heating airflow when required.

HEATING SEQUENCE OF OPERATION

(See Fig. 15-17 and unit wiring label.)

On a call for heating, terminal W of the thermostat is energized.

starting the induced- draft motor. When the hall-effect sensor on the

induced-draft motor senses that it has reached the required speed,

the burner sequence begins. This function is performed by the

integrated gas control (IGC). The indoor (evaporator)-fan motor is

energized 45 sec after flame is established. When the thermostat is

satisfied and W is de-energized, the burners stop firing and the

indoor (evaporator) fan motor shuts off after a 45-sec time-off

delay.

Please note that the ignition control board (IGC) has the capability

to automatically reduce the indoor fan motor on and offdelays in the

event of high duct static and/or partially-clogged filter. An

adjustment of fan delays by the ignition control board is indicated

by a flash code "1" on the LED on the IGC.

An LED (light-emitting diode) indicator is provided on the control

board to monitor operation. The control board is located by

removing the burner access panel. During normal operation, the

LED is continuously on (See Table 4 for status codes).

'Ji

's sl_,,,, 4;;c , ., ,, D _ .... .

'_kJ k, lkJ ' I' _ U

IS i

(}---

L]1 CI,!i OI /d! _ri IMI IS

i _ (5_1 3;LIC ,S

j _.................., ....................::::: _,, : c_

,s,, i[

i sill _ .... l: J J C,'I/

Jd"x:,

i: _ \L x........ io 0

...............................................................................................................................................................................................I.......................................... 8q}500S 0

LIMIT SWITCHES

Normally closed limit switch (LS) completes the control circuit.

Should the leaving-air temperature rise above the maximum

allowable temperature, the limit switch opens and the control circuit

"breaks." Any interruption in the control circuit instantly closes the

gas valve and stops gas flow to the burners and pilot. The blower

motor continues to run until LS resets.

When the air temperature at the limit switch drops to the

low-temperature setting of the limit switch, the switch closes and

completes the control circuit. The direct-spark ignition system

cycles and the unit returns to normal heating operation.

Table 4--LED Indications

STATUS CODE

Normal Operation 2

Hardware Failure

Fan On/Off Delay Modified 2

Limit Switch Fault

Flame Sense Fault

Four Consecutive Limit Switch Faults

Ignition Lockout Fault

Induced-Draft Motor Fault

Rolloat Switch Fault

Internal Control Fault

Temporary Lock-Out 1 hr auto reset 1

NOTES:

LED INDICATION

Off

1 Flash

2 Flashes

3 Flashes

4 Flashes

5 Flashes

6 Flashes

7 Flashes

8 Flashes

9 Flashes

i, This code indicates an internal processor fault that will reset itself ill one hr.

Fault Call be caused by stray RF signals ill tile strueture or nearby. This is a UL

requirement.

2. LED indicates acceptable operation. Do not ehange ignition control board.

3. When W1 is energized the burners will remain oil fur alninilnum of 60 see.

4. If more than one error mode exists they will be displayed on the LED ill se

quellce.

ROLLOUT SWITCH

The function of the rollout switch is to close the main gas valve in

the event of flame rnllout. The switch is located above the main

burners. When the temperature at the rollout switch reaches the

maximum allowable temperature, the control circuit trips, closing

the gas valve and stopping gas flow to the burners. The indoor

(evaporator) fan motor (IFM) and induced draft motor continue to

run until switch is reset. The IGC LED will display FAULT CODE

Step 3---START-UP COOLING AND MAKE ADJUST-

MENTS

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

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

when operating the unit. Do not operate the compressor when the

outdoor temperature is below 40°F (4.4°C) (unless accessory

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

Allow 5 minutes between on cycles to prevent compressor damage.

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 30 sec.

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).

IMPORTANT: Three-phase, scroll compressors are direction

oriented. Unit must be checked to ensure proper compressor

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

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

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

turning backwards, the difference between compressor suction and

discharge pressures may be dramatically lower than normal.

CHECKING AND ADJUSTING REFRIGERANT CHARGE

UNIT DAMAGE HAZARD

Failure to follow this caution may result in unit 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.

The refrigerant system is fully charged with R-22 refrigerant and

is tested and factory sealed. Allow system to operate a minimum of

15 minutes before checking or adjusting charge.

NOTE: Adjustment of the refrigerant charge is not required unless

the unit is suspected of not having the proper R-22 charge.

A refrigerant charging label is attached to the outside of the service

access door. The charging label and the tables shown refer to system

temperatures and pressures in cooling mode only.

018 Model Only

The charging chart (see Table 6) includes the required liquid line

temperature at given discharge line pressures and outdoor ambient

temperatures.

An accurate subcooling thermocouple or thermistor-type

thermometer and a gauge manifold are required when using the

subcooling charging method for evaluating the unit charge. Do not

use mercury or small dial-type thermometers because they are not

adequate for this type of measurement.

Proceed as follows:

1. Remove caps from low- and high-pressure service fittings.

2. Using hoses with valve core depressors, attach low- and

high-pressure gauge hoses to low- and high-pressure

service fittings, respectively.

3. Start unit in Cooling Mode and let unit run until system

pressures stabilize.

4. Measure and record the fnllowing:

a. Outdoor ambient-air temperature (°F (°C)db).

b. Liquid line temperature (°F (°C).

c. Discharge (high-side) pressure (psig).

5. Using "Cooling Charging (;harts," compare outdoor-air

temperature (°F (°C) db) with the discharge line pressure

(psig) to determine desired system operating liquid line

temperature (See Table 6).

6. Compare actual liquid line temperature with desired liquid

line temperature. Using a tolerance of-+ 2°F. (-+1.1°C) add

refrigerant if actual temperature is more than 2°F (1.1°C)

higher than proper liquid line temperature, or remove

refrigerant if actual temperature is more than 2°F (1.1°C)

lower than required liquid line temperature.

024 through 060 Models

The charging chart (see Table 6A) includes the required suction

line temperature at given suction line pressures and outdoor ambient

temperatures.

An accurate superheat thermocouple or thermistor-type

thermometer and a gauge manifold are required when using the

superheat charging method for evaluating the unit charge. Do not

use mercury or small dial-type thermometers because they are not

adequate for this type of measurement.

Proceed as follows:

1. Remove caps from low- and high-pressure service fittings.

2. Using hoses with valve core depressors, attach low- and

high-pressure gauge hoses to low- and high-pressure

service fittings, respectively.

3. Start unit in Cooling Mode and let unit run until system

pressures stabilize.

4. Measure and record the following:

a. Outdoor ambient-air temperature (°F (°C)db).

b. Evaporator inlet-air temperature (°F (°C) wb.

c. Suction-tube temperature (°F (°C) at low-side service

fitting.

d. Suction (low-side) pressure (psig).

5. Using "Cooling Charging Charts," compare outdoor-air

temperature(°F (°C) db) with the suction line pressure (psig)

to determine desired system operating suction line

temperature. (See Fig. Table 6A.)

6. Compare actual suction-tube temperature with desired

suction-tube temperature. Using a tolerance of .+ 3°F

(-+1.7°C), add refrigerant if actual temperature is more than

3°F (1.7°C) higher than proper suction-tube temperature,

or remove refrigerant if actual temperature is more than 3°F

(1.7°C) lower than required liquid line temperature.

NOTE: If the problem causing the inaccurate readings is a

refrigerant leak, refer to the Check for Refrigerant Leaks section.

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

UNIT OPERATION HAZARD

Failure to follow this caution may result in unit damage.

For cooling operation, the recommended airflow is 350 to 450

cfm for each 12.000 Btuh of rated cooling capacity. For

heating operation, the airflow must produce a temperature rise

that falls within the range stamped on the unit rating plate.

Table 8 shows the temperature rise in each heating mode. Refer to

these tables to determine the desired heating airflow for the system

being installed. (See Table 7 for filter pressure drop and Table 9 for

wet coil pressure drop).

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 and install lockout tag

before changing blower speed.

Airflow can be changed by changing the lead connections of the

blower motor.

All 48SD units are factor wired for low speed except the 030

through the 048 size.

For color coding on the motor leads, see Table 5.

Table 5--Color Coding for Motor Leads

Black =High Speed

Blue = Medium Speed

Red = Low Speed

To change the speed of the indoor fan motor (IFM), remove the fan

motor speed leg lead from the blower relay (BR). This wire is

attached to terminal blower motor (BM) of the integrated gas control

(IGC) board for single-phase units. To change the speed, remove

and replace with lead for desired blower motor speed. Insulate the

removed lead to avoid contact with chassis parts.

COOLING SEQUENCE OF OPERATION

With the room thermostat SYSTEM switch in the COOL position

and the FAN switch in the AUTO position, the cooling sequence of

operation is as follows:

1. When the room temperature rises to a point that is slightly

above the cooling control setting of the thermostat, the

thermostat completes the circuit between thermostat

terminal R to terminals Y and G.

2. The normally open contacts of energized contacmr (C) close

and complete the circuit through compressor motor (COMP)

to condenser (outdoor) fan motor (OFM). Both motors start

instantly.

3. The set of normally open contacts of energized relay BM

close and complete the circuit through evaporator blower

(indoor) fan motor (IFM).

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

not be started again until 5 minutes have elapsed. The cooling cycle

remains on until the room temperature drops to a 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 deenergize

contactor coil C. The condenser and compressor motors stop. After

a 30-sec. delay, the blower motor stops. The unit is in a standby

condition, waiting for the next call for cooling from the room

thermostat.

Model

Size

018

Table 6---Cooling Charging Chart -018 only

Required Subcooling °F (°C) Required Liquid Line Temperature for a Specific Subcooling (R-22)

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

76 (24) 85 (29) 96 (36) 106 (41) 115 (46)

12(6.7) 12(6,7) 12(6.7) 12(6,7) 12(6.7)

Pressure 5 10 15 20

(psig)

134 71 66 61 56

141 74 69 64 59

148 77 72 67 62

166 80 75 70 65

163 83 78 73 68

171 86 81 76 71

179 89 84 79 74

187 92 87 82 77

196 95 90 85 80

206 98 93 88 83

214 101 96 91 86

223 104 99 94 89

233 107 102 97 92

243 110 105 100 95

253 113 108 103 98

264 116 111 106 101

274 119 114 109 104

265 122 117 112 107

297 125 120 115 110

309 128 123 118 113

321 131 126 121 116

331 134 129 124 119

346 137 132 127 122

359 140 135 130 125

Pressure 36811

(kPa)

924 22 19 16 13

972 23 21 18 15

1020 25 22 19 17

1076 27 24 21 18

1124 28 26 23 20

1179 30 27 24 22

1234 32 29 26 23

1289 33 31 28 25

1351 35 32 29 27

1413 37 34 31 28

1475 38 36 33 30

1536 40 37 34 32

1606 42 39 36 33

1675 43 41 38 35

1744 45 42 39 37

1820 47 44 41 38

1889 48 46 43 40

1965 50 47 44 42

2048 52 49 46 43

2130 53 51 48 45

2213 55 52 49 47

2282 57 54 51 48

2386 58 56 53 50

2475 60 57 54 52

Table 6A--Coollng Charging Chart = 024 through 060 only

ODTemp,

105

115

125

Sucti0nLineTem_

SuctionLinePressurePS(P_.G._

52 54 56 59 61 64 67 70 73 76 79 82 85 89 92

51 55 60 64 69 ...................

53 57 62 66 70 ...............

53 57 62 66 71 75 .........

............. 56 61 66 71 76

............... 53 58 63 67 72

................. 50 54 58 62 66

................... 50 53 57 60 64

................... 49 52 55 58 61

..................... 50 53 56 59

FILTER SIZE in.

(mm)

20X20X1

(508X508X25)

24X30X1

(610X762X25)

24X36X1

(61OX914X24)

ODTemp,

(°C)

SuctionLineTem_

SactionLinePress_

36t 370 387 405 423 442 462 482 502 523 544 566 589 612 636

I1 13 15 18 21 ...................

12 14 16 19 21 ...............

....... 12 14 17 19 21 24 .........

............. 13 I6 19 22 24

............... 12 14 17 20 22

................. 10 12 14 17 19

................... 10 12 14 16 18

................... 9 11 13 14 16

..................... 10 1I 13 15

AO5109v2

Table 7--Filter Pressure Drop Table (in. wc)

CFM

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

0.05 0.07 0.08 0.1 0.12 0.13 0.14 0.15

0.04 0.05 0.06 0.07 0.07 0.08 0.09 0.1

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

Unit

48SD(-,N)018040

48SD(-,N)024040

48SD(-,N)024060

48SD(-,N)030040

48SD(-,N)030060

48SD(-,N)036060

48SD(-,N)056090

48SD(-,N)042060

48SD(-,N)042090

48SD(-,N)048090

48SD(-,N)048115

Heating Rise Motor

Range °F Speed

Low 1

30 -60

High

Table 8--Dry Coil Air Delivery* - Horizontal and Downflow Discharge -

Unit 48SD018-060 (Deduct 10% for 208 Volts)

External Static Pressure (in. we)

0.1 0,2 0.3 0,4 0.5 0,6

Watts 260 243 229 217 209 - -

CFM 859 775 667 536 382 - -

Heating Rise OF 35 39 45 56 NA NA

Watts 340 328 317 307 300 294

CFM 1064 948 820 680 528 364

Heating Rise OF NA 32 37 44 57 NA

Watts 311 309 304 301 285 290

Low 1 CFM 955 885 820 757 685 583

Heating Rise OF 32 34 37 40 44 NA

Watts 411 405 398 390 379 357

20 - 50 Medium CFM 1195 1155 1100 1028 957 868

Heating Rise OF 25 26 27 29 31 35

Watts 528 518 509 492 477 467

High CFM 1484 1421 1568 1279 1185 1088

Heating Rise OF 20 21 22 23 25 28

Watts 311 309 304 301 286 290

Low I CFM 955 885 820 757 686 583

Heating Rise OF 48 51 55 59 NA NA

Watts 411 405 398 390 379 357

35 - 65 Medium CFM 1195 1155 1100 1028 957 868

Heating Rise OF 38 39 41 44 47 52

Watts 528 518 509 492 477 467

High CFM 1484 1421 1568 1279 1185 1088

Heating Rise OF NA NA NA 35 38 41

Watts 311 309 304 301 286 290

Low CFM 955 885 820 757 686 583

Heating Rise OF 32 34 37 40 44 NA

Watts 411 405 398 390 379 357

20 - 50 Medium I CFM 1195 1155 1100 1028 957 868

Heating Rise OF 25 26 27 29 31 35

Watts 528 518 509 492 477 467

High CFM 1484 1421 1568 1279 1185 1088

Heating Rise OF 20 21 22 23 25 28

Watts 311 309 304 301 286 290

Low CFM 935 885 820 757 686 583

Heating Rise OF 48 51 55 59 NA NA

Watts 411 405 398 390 379 357

35 - 65 Medium I CFM 1195 1155 1100 1028 957 868

Heating Rise OF 38 39 41 44 47 52

Watts 528 518 509 492 477 467

High CFM 1484 1421 1568 1279 1185 1088

Heating Rise OF NA NA NA 35 38 41

Watts 439 429 415 401 395 380

Low CFM 1242 1170 1089 994 917 837

Heating Rise OF 36 38 41 45 49 54

Watts 503 491 479 461 450 436

25 - 55 Medium I CFM 1320 1244 1162 1081 1005 897

Heating Rise OF 34 36 39 42 45 50

Watts 641 627 623 609 601 588

High CFM 1562 1288 1205 1119 1033 935

Heating Rise OF 33 35 37 40 44 48

Watts 439 429 415 401 395 380

Low CFM 1242 1170 1089 994 917 837

Heating Rise OF 54 58 62 68 NA NA

Watts 503 491 479 461 450 436

40 - 70 Medium I CFM 1320 1244 1162 1081 1005 897

Heating Rise OF 51 54 58 62 67 NA

Watts 641 527 623 509 601 588

High CFM 1562 1288 1205 1119 1033 935

Heating Rise OF 50 52 56 60 65 NA

Watts 434 428 422 403 404 390

Low CFM 1282 1241 1206 1160 1109 1040

Heating Rise OF 35 36 37 39 41 43

Watts 560 548 555 526 511 496

0.7 0,8

NA NA

286 280

423 263

NA NA

357 345

769 647

39 46

447 435

970 855

31 35

286 280

423 263

NA NA

357 345

769 647

59 NA

447 435

970 855

46 53

286 280

423 263

NA NA

357 345

769 647

39 46

447 435

970 855

31 35

286 280

423 263

NA NA

357 345

769 647

59 NA

447 435

970 855

46 53

355 339

702 570

NA NA

418 404

757 662

NA NA

571 559

826 714

54 NA

556 339

702 570

NA NA

418 404

767 662

NA NA

571 559

826 714

NA NA

375 360

967 890

47 51

478 460

25 - 55 Medium I CFM 1526 1482 1437 1398 1344 1281 1205 1125

Heating Rise OF 29 30 31 32 33 35 37 40

Watts 755 746 730 709 690 664 642 624

High CFM 1860 1805 1751 1685 1620 1541 1468 1370

Heating Rise OF NA 25 26 27 28 29 31 33

Watts 434 428 422 403 404 390 575 360

Low CFM 1282 1241 1206 1160 1109 1040 967 890

Heating Rise OF 55 54 56 58 61 65 70 NA

Watts 560 548 555 526 511 496 478 460

40 - 70 Medium I CFM 1526 1482 1437 1398 1344 1281 1205 1125

Heating Rise OF 44 46 47 48 50 53 56 60

Watts 755 746 730 709 690 564 642 524

High CFM 1860 1805 1751 1685 1620 1541 1468 1370

Heating Rise OF NA NA NA 40 42 44 46 49

Watts 627 617 607 584 567 548 528 503

Low CFM 1550 1530 1493 1461 1414 1361 1620 1250

Heating Rise OF 44 44 45 46 48 50 51 54

Watts 771 755 734 711 690 565 639 507

25 - 55 Medium I CFM 1798 1771 1734 1687 1645 1595 1530 1449

Heating Rise OF 38 38 39 40 41 42 44 47

Watts 969 941 908 887 858 827 804 767

High CFM 2124 2071 2000 1944 1876 1811 1735 1647

Heating Rise OF 32 33 34 35 36 37 39 41

Watts 627 617 607 584 567 548 528 503

Low CFM 1550 1530 1493 1461 1414 1361 1520 1250

Heating Rise OF 56 56 58 59 61 63 65 NA

Watts 771 755 734 711 690 665 639 607

35 - 65 Medium I CFM 1798 1771 1734 1687 1645 1595 1530 1449

Heating Rise OF 48 49 50 51 52 54 56 60

Watts 969 941 905 887 858 827 804 767

High CFM 2124 2071 2000 1944 1876 1811 1735 1647

Heating Rise OF 41 42 43 44 46 48 50 52

0.9

327

365

421

712

327

365

421

712

327

365

421

712

327

565

421

712

329

442

389

541

548

580

529

442

389

541

548

580

344

813

439

1029

600

1265

544

813

439

1029

600

1265

480

1177

572

1355

748

1555

480

1177

572

1355

748

1555

Table 8Con't--Dry Coil Air Delivery* - Horizontal and Downflow Discharge -

Unit 48SD018-060 (Deduct 10% for 208 Volts)

Unit Heating Rise Motor

Range °F Speed 0.1 0.2 0.3

Watts 627 6t 7 607

Low CFM 1550 1530 1493

Heating Rise OF 63 64 65

Watts 771 755 734

48SD(-,N)048130 40 - 70 Medium I CFM 1798 1771 1734

Heating Rise OF 54 55 56

Watts 969 941 908

High CFM 2124 2071 2000

Heating Rise OF 46 47 49

Watts 786 769 754

Low I CFM 2027 1960 1901

Heating Rise OF 83 34 86

Watts 873 849 833

48SD(-,N)060090 25 - 55 Medium CFM 2095 2026 1962

Heating Rise OF 32 33 34

Watts 1012 998 981

High CFM 2184 2109 2036

Heating Rise OF 81 32 83

Watts 786 769 754

Low I CFM 2027 1960 1901

Heating Rise OF 43 44 45

Watts 873 849 833

48SD(-,N)060115 35 - 65 Medium CFM 2095 2026 1962

Heating Rise OF 41 43 44

Watts 1 O12 998 981

High CFM 2184 2109 2036

Heating Rise OF 39 41 42

Watts 786 769 754

Low I CFM 2027 1960 1901

Heating Rise OF 48 50 51

Watts 873 849 833

48SD(-,N)060130 40 - 70 Medium CFM 2095 2026 1962

Heating Rise OF 47 48 50

Watts 1012 998 981

High CFM 2184 2109 2036

Heating Rise OF 45 46 48

Air delivery values are without air filter and are for dry coil (see \V_t Coil Pressure Drop table).

iFactory shipped lleating'cooling speed

"NA" = Not allowed for heating speed

Note: Deduct field supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting.

External Static Pressure (in. we)

0,4 0.5 0,6 0.7 0,8 0.9

584 567 548 528 503 480

1461 1414 1361 1320 1250 1177

67 69 NA NA NA NA

711 690 665 639 607 572

1687 1645 1595 1530 1449 1355

58 59 61 64 67 NA

887 858 827 804 767 748

1944 1876 1811 1735 1647 1555

50 52 54 56 59 63

736 722 705 684 658 616

1821 1759 1693 1616 1518 1354

37 38 40 42 45 50

815 798 782 763 748 704

1887 1817 1748 1679 1583 1439

38 37 39 40 43 47

963 948 927 904 886 848

1963 1886 1812 1729 1647 1496

34 86 37 89 41 45

736 722 705 684 658 616

1821 1759 1693 1616 1513 1354

47 49 51 53 57 64

815 798 782 763 748 704

1887 1817 1748 1679 1583 1439

46 47 49 51 54 60

963 948 927 904 886 848

1963 1886 1812 1729 1647 1496

44 46 48 50 52 58

736 722 705 684 658 618

1821 1759 1693 1616 1513 1354

54 55 58 60 64 NA

815 798 782 763 748 704

1887 1817 1748 1679 1583 1439

52 54 56 58 82 68

963 948 927 904 886 848

1963 1886 1812 1729 1647 1496

50 52 54 56 59 65

Table 9--48SD Wet Coil Pressure Drop (in. wc)

UNIT STANDARD CFM (S.C.EM.)

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

018 0.011 0.013 0.018 0.022 - -

024

030

036

042

048

060

0,030 0.037 0,044 0.053 0,063 - -

0.037 0.044 0.053 0.063 0.072 0.081 0.105 -

0.05 0.061 0.072 0.080 0.090 0.110

0.044 0.051 0.059 0.065 0.072 0.080 0.088 0.095 0.105 -

0.044 0.050 0.053 0.059 0.066 0.072 0.077 0.086

- 0.079 0,087 0.095 0,102 0.113 0,123

MAINTENANCE

To ensure continuing high performance and to minimize the

possibility of premature equipment failure, periodic maintenance

must be performed on this equipment. This unit should be inspected

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

unit, refer to Table 10, Troubleshooting Chart.

NOTE TO EQUIPMENT OWNER: Consult your local dealer

about the availability of a maintenance contract.

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury

or death and unit component damage.

The ability to properly perform maintenance on this

equipment requires certain expertise, mechanical skills, tools

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

perform any maintenance on this equipment, other than those

procedures recommended in the Owner's Manual.

ELECTRICAL SHOCK HAZARD

Failure to follow these warnings could result in personal

injury or death:

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

maintenance or service on this unit.

2. Use extreme caution when removing panels and parts.

3. Never place anything combustible either on or in contact

with the unit.

UNIT OPERATION HAZARD

Failure to follow this caution may result in improper

operation.

Errors made when reconnecting wires may cause improper

and dangerous operation. Label all wires prior to

disconnecting when servicing.

The minimum maintenance requirements for this equipment are as

follows:

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

necessary.

2. Inspect indoor coil, drain pan, and condensate drain each

cooling season for cleanliness. Clean when necessary.

3. Inspect blower motor and wheel for cleanliness at the

beginning of each heating and cooling season. Clean when

necessa U. For first heating and cooling season, inspect

blower wheel bi-monthly to determine proper cleaning

frequency.

4. Check electrical connections for tightness and controls for

proper operation each heating and cooling season. Service

when necessary.

5. Ensure electric wires are not in contact with refrigerant

tubing or sharp metal edges.

6. Check and inspect heating section before each heating

season. Clean and adjust when necessary.

7. Check flue hood and remove any obstructions, if necessary.

AIR FILTER

IMPORTANT: Never operate the unit without a suitable air filter

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

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

recommended filter sizes.

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

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

each cooling season and twice during the heating season, or

whenever the filter becomes clogged with dust and lint.

INDOOR BLOWER AND MOTOR

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

these motors.

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

accumulated dirt and grease from the blower wheel and motor

annually.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Disconnect and tag electrical power to the unit before cleaning

and lubricating the blower motor and wheel.

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 (BM).

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. 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.

FLUE GAS PASSAGEWAYS

To inspect the flue collector box and upper areas of the heat

exchanger:

1.Removetheinduced-draftblowerassemblyaccordingto

directionsbelow.

2.Removethefluecollectorboxcover(SeeFig.18)fromthe

heatexchangerassembly.Inspecttheheatexchangers.

3.Cleanallsurfaces,asrequired,usingawirebrush.

INDUCED-DRAFT (COMBUSTION AIR) BLOWER

ASSEMBLY

The induced-draft blower assembly consists of the inducer motor.

the blower housing, and the induced-draft blower wheel.

Clean periodically to assure proper airflow and heating efficiency.

Inspect blower wheel every fall and periodically during the heating

season. For the first heating season, inspect blower wheel bimonthly

to determine proper cleaning frequency.

To inspect blower wheel, remove draft hood assembly. Shine a

flashlight into opening to inspect wheel. If cleaning is required,

remove induced-draft blower assembly as follows:

1. Remove unit access panel (See Fig. 19).

2. Remove the 7 screws that attach induced-draft motor

assembly to the flue collector box cover.

3. Slide the assembly out of the unit. (See Fig. 20). Clean the

blower wheel. If additional cleaning is required, continue

with Steps 4 and 5.

4. To remove blower wheel, remove 2 setscrews.

5. To remove inducer motor, remove screws that hold the

inducer motor to the blower housing.

6. To reinstall, reverse the procedure outlined above.

LIMIT SWITCH

Remove unit access panel. Limit switch is located on the blower

partition.

NOTE: Some models have two limit switches.

BURNER IGNITION

Unit is equipped with a direct spark ignition 100 percent lockout

system. Ignition module is located in the control box (See Fig. 18).

Module contains a self-diagnostic LED. During servicing, refer to

label diagram for LED interpretation.

If lockout occurs, unit may be reset by either momentarily

interrupting power supply to unit or by turning selector switch to

OFF position at the thermostat.

MAIN BURNERS

At the beginning of each heating season, inspect for deterioration or

blockage due to corrosion or other causes. Observe the main burner

flames and adjust, if necessary.

Removal of Burner Assembly

To remove the burner assembly for servicing:

1. Shut off main gas valve.

2. Shut off power to unit and install lockout tag.

3. Remove unit access panel (See Fig. 19).

4. Disconnect gas piping at unit gas valve.

5. Remove wires connected to gas valve. Mark each wire.

6. Remove ignitor and sensor wires at the ignitor module.

7. Remove the mounting screw that attaches the burner rack to

the unit base (See Fig. 18).

8. Slide the burner rack out of the unit (See Fig. 18 and 21).

9. To reinstall, reverse the procedure outlined above.

OUTDOOR COIL. INDOOR COIL. AND CONDENSATE

DRAIN PAN

Inspect the condenser coil, evaporator coil. and condensate drain

pan at least once each year.

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

the coils either before or after each cooling 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 trough with

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

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

snake" or similar probe device.

IGNITION MODULE INDUCED DRAFT MOTOR MOUNT

\ ! ¢

ROLLOUT

\ SWITCH

BURNER MOUNTING

COLLECTOR BLOWER

BOX HOUSING RACK SCREW

Fig. 18 - Blower Housing and Flue Collector Box

A05119

FRONT

ACCESS PANEL

Fig. 19 - Unit Access Panel

C99091

BLOWER

HOUSING

(HIDDEN)

C99085

Fig. 20 -Removal of Induced-Draft Blower Assembly

ELECTRICAL CONTROLS AND WIRING

Inspect and check the electrical controls and wiring annually. Be

sure to turn off the electrical power to the unit.

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

Check all electrical connections for tightness. Tighten all screw

connections. If any smoky or burned connections are noticed.

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

and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace all the

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

cycle to ensure proper operation. If discrepancies are observed in

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

each electrical component with the proper electrical

instrumentation. Refer to the unit wiring label when making these

checks.

REFRIGERANT CIRCUIT

Inspect all refrigerant tubing connections and the unit base for oil

accumulation annually. Detecting oil generally indicates a

refrigerant leak.

Fig. 21 - Burner Rack Removed

OUTDOOR FAN

C99086

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit

components.

Keep the condenser fan free from all obstructions to ensure

proper cooling operation. Never place articles on top of the

unit.

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

cover.

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

expose fan blade.

3. Inspect the fan blades for cracks or bends.

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

motor shaft.

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

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

be visible) (See Fig. 12).

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

when tightening.

7. Replace grille.

EXPLOSION, PERSONAL INJURY HAZARD

Failure to follow this warning could result in property

damage, personal injury or death.

System under pressure. Relieve pressure and recover all

refrigerant before system repair or final unit disposal. Use all

service ports and open all flow-control devices, including

solenoid valves.

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

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

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

Refrigerant Leaks section.

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

refer to Checking and Adjusting Refrigerant Charge section.

INDOOR AIRFLOW

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

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

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

obstructions, and that the air filter is clean.

METERING DEVICES

018 Model Onlv-TXV

This metering device is a hard shutoff, balance port TXV. The TXV

maintains a constant superheat at the evaporator exit resulting in

higher overall system efficiency.

024 through 060 Models-AccuRater Piston

Refrigerant metering device is a fixed orifice and is located in the

distributor assembly to the indoor coil.

LIQUID LINE STRAINER

The liquid line strainer (to protect metering device) is made of wire

mesh and is located in the liquid line on the inlet side of the metering

device.

TROUBLESHOOTING

Refer to the Troubleshooting (:hart (Table 10-12) for

troubleshooting information.

START-UP CHECKLIST

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

SYMPTOM

Compressor and condenser fan will not start,

Compressor will not start but condenser fan

rune

Three-phase scroll compressor

makes excessive noise, and there may be a

low pressure differential

Compressor cycles (other than normally sat=

isfying thermostat)

Compressor operates continuously

Excessive head pressure

Head pressure too low

Excessive suction pressure

Suction pressure too low

Table lO--Troubleshooting Chart

CAUSE

Power failure

Fuse blown or circuit breaker tripped

Defective contactor, transformer, or high-pressure,

loss-of-charge or low-pressure switch

Insufficient line voltage

Incorrect or faulty wiring

Thermostat setting too high

Faulty wiring or loose connections in compressor cir-

cuit

Compressor motor burned out, seized, or

internal overload open

Defective run/start capacitor, overload, start relay

One leg of 3-phase power dead

Low input voltage (20% low)

Scroll compressor is rotating in the wrong direction

Refrigerant overcharge or undercharge

Defective compressor

Insufficient line voltage

Blocked outdoor coil

Defective run/start capacitor

Faulty outdoor fan motor or capacitor

Restriction in refrigerant system

Dirty air filter

Unit undersized for load

Thermostat temperature set too low

Low refrigerant charge

Air in system

Outdoor 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

Compressor valves leaking

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

Filter drier restricted

REMEDY

Call power company

Replace fuse or reset circuit breaker

Replace component

Determine cause and correct

Check wiring diagram and rewire correctly

Lower thermostat temperature 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

Determine cause and correct

Correct the direction of rotation by reversing the

8-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 rating plate

Replace and determine cause

Determine cause and correct

Determine cause and replace

Replace

Locate restriction and remove

Replace filter

Decrease load or increase uoit size

Reset thermostat

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

Replace compressor

Recover excess refrigerant

Replace filter

Check for leaks, repair and recharge

Remove source of restriction

Increase air quantity

Check filte_replace if necessary

Reset thermostat

Install low-ambient kit

Replace filter

Table ll--Troubleshoofing Guide-Heating

SYMPTOM CAUSE REMEDY

Water in gas line Drain. Install drip leg.

No power to furnace Check power supply fuses, wiring or circuit breaker,

Check transformer.

No 20-v power supply to control circuit NOTE: Some transformers have internal over-current protection

that requires a cool-down period to reset.

Burners will not ignite Mis-wired or loose connections Check all wiring and wire nut connections

Check flame ignition and sense electrode positioning,

Misaligned spark electrodes Adjust as necessary,

1. Check gas line for air. Purge as necessary. NOTE: After purging

gas line of air, wait at least 5 minutes for any gas to dissipate be-

No gas at main burners fore attempting to light unit,

2. Check gas valve,

Dirty air filter Clean or replace filter as necessary

Gas input to furnace too low Check gas pressure at manifold match with that on unit nameplate

Unit undersized for application Replace with proper unit or add additional unit

Inadequate heating Restricted airflow Clean or replace filter, Remove any restriction.

Check rotation of blower, temperature rise of unit, Adjust as neces-

Limit switch cycles main burners sary,

1. Tighten all screws around burner compartment

2. Cracked heat exchanger. Replace.

3. Unit over-fired. Reduce input (change orifices or adjust gas line

Poor flame characteristics Incomplete combustion results in: Aldehyde odors, or manifold pressure).

carbon monoxide, sooting flame, floating flame 4. Check burner alignment.

5. Inspect heat exchanger for blockage. Clean as necessary,

Table 12--Troubleshooting Guide-LED Status Codes

SYMPTOM CAUSE REMEDY

Check 5-amp fuse son IGC*, power to unit, 24-v circuit breaker,

Hardware failure and transformer. Units without a 24-v circuit breaker have an inter-

(LED OFF) Loss of power to control module (iGC)*, nal overload in the 24-v transformer, If the overload trips, allow 10

minutes for automatic reset.

Limit switch faults Check the operation of the indoor (evaporator) fan motor. Ensure

(LED 2 flashes) High temperature limit switch is open, that the supply-air temperature rise is in accordance with the range

on the unit nameplate. Clean or replace filters,

Flame sense fault The IGC sensed flame that should not be present. Reset unit, If problem persists, replace control board,

(LED 3 flashes)

4 consecutive limit switch Check the operation of the indoor (evaporator) fan motor and that

faults Inadequate airflow to unit, supply-air temperature rise agrees with range on unit nameplate

(LED 4 flashes) information,

Ignition lockout Check ignitor and flame sensor electrode spacing, gaps, etc, En-

(LED 5 flashes) Unit unsuccessfully attempted ignition for 15 minutes, sure that fame sense and ignition wires are properly terminated,

Verify that unit is obtaining proper amount of gas.

Check for proper voltage. If motor is operating, check the speed

Induced-draft motor fault IGC does not sense that induced-draft motor is operat- sensor ptug/IGC Terminal J2 connection, Proper connection:

(LED 6 flashes) ing,* PIN 1 - White

PIN 2 - Red

PIN 3 - Black

Rollout switch will automatically reset, but IGC will continue to

Roliout switch fault lockout unit. Check gas valve operation. Ensure that induced-draft

(LED 7 flashes) Rollout switch has opened, blower wheel is properly secured to motor shaft, inspect heat ex-

changer. Reset unit at unit disconnect.

Internal control fault Microprocessor has sensed an error in the software or If error code is not cleared by resetting unit power, replace the

(LED 8 flashes) hardware. IGC*.

Temporary software lockout Reset 24-v. to control board or turn thermostat oft, then on again,

(LED 9 flashes) Electrical interference impeding IGC software Fault will automatically reset itself in one (1) hour,

WARNING/!_ :If the IOC illI1st be replaced, be stlre to ground yotlrself to dissipate any electrical charge that my be present before handling new control board. The IOC is

sensitive to static electricity and m) be damaged if the necessary precautions are not taken.

IMPORTANT: Refer to Table 11 Troubleshooting Guide Heating for additional troubleshooting analysis.

LEGEND

IG( Integrated Gas Unit Controller

LED Light Emitting Diode

i. Preliminary Information

MODEL NO.:

SERIAL NO.:

DATE:

TECHNICIAN:

START-U P CHECKLIST

(Remove and Store in Job File)

il. PRE-START-UP (Insert checkmark in box as each item is completed)

() VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS

( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

( ) CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE)

() CHECKTHAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE

( ) VERIFY THAT UNIT INSTALLATION IS LEVEL

( ) CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREWTIGHTNESS

ill. START-UP

ELECTRICAL

SUPPLY VOLTAGE

COMPRESSOR AMPS

INDOOR (EVAPORATOR) FAN AMPS

TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE DB

RETURN-AIR TEMPERATURE DB WB

COOLING SUPPLY AIR DB WB

GAS HEAT SUPPLY AIR

PRESSURES

GAS INLET PRESSURE

GAS MANIFOLD PRESSURE

REFRIGERANT SUCTION

REFRIGERANT DISCHARGE

( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GAS HEAT TEMPERATURE RISE

TEMPERATURE RISE (See Literature) RANGE

MEASURED TEMPERATURE RISE

*Measured at suction inlet to compressor

1-Measured at liquid line leaving condenser.

IN.WG

PSiG SUCTION LINE TEMP*

PSIG DISCHARGE TEMPt

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

Catalog No: 48SD-7Sl

Replaces: 48SD-6SI

CARRIER Package Units(both Units Combined) Manual L0801131

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