CARRIER Package Units(both Units Combined) Manual L0703136

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

IMPORTANT: This installation instruction contains basic unit

installation information including installation of field control

devices. For information on unit start-up, service, and operation,

refer to the unit Controls, Start- Up, Operation, Service, and

Troubleshooting Instructions also enclosed in the unit literature

packet.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS ........................ 1

INSTALLATION ................................... 2

Step 1 - Provide Unit Support ...................... 2

Step 2 - Rig and Place Unit ........................ 2

Step 3 - Field Fabricate Ductwork ................... 6

Step 4 - Make Unit Duct Connections ................ 6

Step 5 - Install Flue Hood and Inlet Hood ............. 6

Step 6 - Install External Trap for Condensate Drain ..... 8

Step 7 - Orifice Change ........................... 9

Step 8 - Install Gas Piping ........................ 10

Step 9 - Make Electrical Connections ............... 10

Step 10 - Install Outdoor-Air Hoods (Units with

Economizer ............................ 13

Step 11 - Install All Accessories .................... 13

Step 12 - Configure Controls ...................... 13

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be

hazardous due to system pressure and electrical components.

Only trained and qualified service personnel should install, repair,

or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance functions

of cleaning coils and filters and replacing filters. All other

operations should be performed by trained service personnel.

When working on air-conditioning equipment, observe

precautions in the literature, tags and labels attached to the unit,

and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use

quenching cloth for unbrazing operations. Have fire extinguishers

available for all brazing operations.

Recognize safety information. This is the safety-alert symbol

Z_. When you see this symbol on the furnace and in

instructions or manuals, be alert to the potential for personal

injury.

Understand the signal words DANGER, WARNING. and

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

DANGER identifies the most serious hazards which win result in

severe personal injury or death. WARNING signifies a hazard

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

to identify unsafe practices which may result in minor personal

injury or product and property damage. NOTE is used to

highlight suggestions which will result in enhanced installation.

reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal

injury or death.

Before performing service or maintenance operations

on unit, turn off main power switch to unit and install

lockout tag. Ensure electrical service to rooftop unit

agrees with voltage and amperage listed on the unit

rating plate.

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal

injury, death and/or equipment damage.

Puron (R-410a) refrigerant systems operate at higher

pressures than standard R-22 systems. Do not use R-22

service equipment or components on Puron refrigerant

equipment.

FIRE,EXPLOSIONHAZARD

Failuretofollowthiswarningcouldresultinpersonal

injury,deathand/orpropertydamage.

Improperinstallation,adjustment,alteration,service,or

maintenancecancausepropertydamage,personal

inju_,orlossof life.RefertotheUser'sInformation

Manualprovidedwiththisunitformoredetails.

Donotstoreorusegasolineorotherflammablevapors

andliquidsinthevicinityofthisoranyotherappliance.

What to do if you smell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any electrical switch, or use any

phone in your building.

3. IMMEDIATELY call your gas supplier from a

neighbor's phone. Follow the gas supplier's

instructions.

4. If you cannot reach your gas supplier, call the fire

department.

FIRE, EXPLOSION HAZARD

Failure to follow this warning could cause death and/or

property damage.

Disconnect gas piping from unit when leak testing at

pressure greater than 1/2 psig. Pressures greater than 1/2

psig will cause gas valve damage resulting in hazardous

condition. If gas valve is subjected to pressure greater

than 1/2 psig, it must be replaced before use. When

pressure testing field-supplied gas piping at pressures of

1/2 psig or less, a unit connected to such piping must

be isolated by manually closing the gas valve(s).

IMPORTANT: Units have high ambient operating limits. If

limits are exceeded, the units will automatically lock the

compressor out of operation. Manual reset will be required to

restart the compressor.

INSTALLATION

Step 1 --Provide Unit Support

Roof Curb

Assemble or install accessory roof curb in accordance with

instructions shipped with this accessory. (See Fig. 1.) Install

insulation, cant strips, roofing, and counter flashing as shown.

Ductwork can be installed to roof curb before unit is set in place.

Ductwork must be attached to curb and not to the unit. Curb must

be level. This is necessary to permit unit drain to function

properly. Unit leveling tolerance is -+1/16 in. per linear ft in an 5,

direction. Refer to Accessory Roof Curb Installation Instructions

for additional information as required. When accessory roof curb

is used, unit may be installed on class A. B, or C roof covering

material. Carrier roof curb accessories are for flat roofs or slab

mounting.

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

critical for a watertight seal. Install gasket with the roof curb as

shown in Fig. 1. Improperly applied gasket can also result in air

leaks and poor unit performance. Do not slide unit to position on

roof curb.

Alternate Unit Support

When a curb cannot be used. install unit on a noncombustible

surface. Support unit with sleepers, using unit curb support area.

If sleepers cannot be used. support long sides of unit with a

minimum of 3 equally spaced 4-in. x 4-in. pads on each side.

Step 2 --Rig and Place Unit

Inspect unit for transportation damage. See Table 1 for physical

data. File any claim with transportation agency.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal

injury, death and property damage.

All panels must be in place when rigging and lifting.

Do not drop unit; keep upright. Use wooden top skid or spreader

bars over unit to prevent sling or cable damage. Rollers may be

used to move unit across a roof. Level by using unit rail as a

reference: leveling tolerance is -+ 1/16 in. per linear fl in any

direction. See Fig. 2 for additional information. Unit rigging

weight is shown in Fig. 2.

Rigging holes are provided in the unit base rails as shown in Fig.

2. Refer to rigging instructions on unit.

Positioning

Maintain clearance, per Fig. 3. around and above unit to provide

minimum distance from combustible materials, proper airflow,

and service access.

Do not install unit in an indoor location. Do not locate air inlets

near exhaust vents or other sources of contaminated air. For

proper unit operation, adequate combustion and ventilation air

must be provided in accordance with Section 5.3 (Air for

Combustion and Ventilation) of the National Fuel Gas Code,

ANSI Z223.1 (American National Standards Institute).

Although unit is weatherproof, guard against water from higher

level runoff and overhangs.

Locate mechanical draft system flue assembly at least 4 ft from

any opening through which combustion products could enter the

building, and at least 4 ft from any adjacent building (or per local

codes). When unit is located adjacent to public walkways, flue

assembly must be at least 7 ft above grade. Locate unit at least 10

ft away from adjacent units.

Roof Mount

Check building codes for weight distribution requirements. Unit

operating weight is shown in Table 1.

AT BASK

[635]

:1 i

[]007 91 _

_NSIDE

_ 0 ¸3¸' B I_

[76 2] 4 /3/4 ¸ _ iB34 71 _

[520 9] O S_¸ SUPPLY A_R

_ ITDR} OPENING

/ ¸ 4 I/B '¸ 1

_ 1731 3}

O 6 /8'

L 2

OUTSIDE

810

269

OUT

O 2 7!8

[1081

ELECTRICA_

SERVICE

BACK ]_ _[[127]

RETURN ENB

MAX CURB LEVELING TOLERAS,CES

Tff

OASKEI

{SUPPLIED _IT_ C_RB_

__ RIGID ]NSUL#TIOR

_ NAL

CO:P,TE R LAS iNG

(r LD S pPLI_O)

_OOr NG FEL

_ FIELO S PLIED

CANT STR P

(F [LD SgPPLi DI

_ ROOFING MAERIA

RETURN i

_4B. AiR i_ ¸- I_ 8 ¸'

i406 Bl [587 B]

}71/B'

[494 7]

UNIT SIZEi ROOF CURB

48PGl'6 i "A" ACCESSOR_

I" 2"_3561 CRRPCURBOS_AOG

2 0" [6_0] CRRECURBOSSAOB

UNiT SIZEi CONNECIOR

48PG i 'C" ACCESSORY

PACKAGE

!6 ! !" NPT CRGASSDRBBBAOO

NOTES

I ROOF CURB ACCESSORY iS SHIPPED UNASSE_DLED

2 BOLT iIEADS TO BE OR INSiB£ OF FLANGE

CLEARANCE IS [_ii g O7116" TYP ALL CORNERS

DIMENSIONS IN [ ] ARE IN M_LLIMETERS

ROOF CURB IS GALVANIZED SIEEi

AiiACR DUCTWORK i0 CBRB (_LANGES ON OUCT

REST ON CURB)

SERVICE CLEARANCE 4F_ ON EACH SIDE

GAS SERVICE RLME IS PAR/ OF _ SEPARA?ELY

S_IPPDD ACCESSORY PACKAGE

GAS SERVICE PLATE CAN BE USED _IT_ EITHER

ACCESSOR_ RODECURB

II_ DIRECTION 0 AiR FLOW

SE BETAiE_

SE DEAIL _\\ \

Oo1/41

DETAIL D

SCALE /:5

o o l/B,,

DEAi

SCALE l:S

O2 3_8'

\W IB_ B]

37 1/_'

[IO98 87

Fig. 1-Roof Curb Details

18 GAUGE STEEL> _IT_ i/B

INCH NEOPRENE INSBiATION

OPDNING FOR

ALT GAS SERVICE

_Eb_BR_ICE

_C' SEE NODE 7 _ B

SERVICE

C06228

Table l--Physical Data

BASE UNIT 48RG

NOMINAL CAPACITY (Tons)

OPERATING WEIGHT (Ib)

Unit*

Economizer

Ver[ica_

Horizontal

Humidi-MiZer TM System

Roof Curb

14-in

24qn

COMPRESSOR

Quantity

Oil Type Sys A

Sys B

Sys C

Number of Refrigerant Circuits

Oil (oz) Sys A

Sys B

Sys C

REFRIGERANT TYPE

Expansion Device

Operating Charge (Ib) Sys A

Sys B

Sys C

Operating Charge Total All Systems (tb)

Unit with Humidi-MiZer System

Operating Charge (Ib) Sys A

Sys B

Sys C

Total Ati Systems (Ib)

CONDENSER COIL

Condenser A (Outer)

Rows.Fins/in

Face Area (sq ft)

Condenser B (Inner)

Rows.Fins/in

Face Area (sq ft)

HumidFMiZer Coi_

Rows Fins/in

Face Area (sq ft)

CONDENSER FAN

Quantity Diameter (in)

Nominal Cfm {Total, all fans)

Motor Hp

Nominal Rpm

EVAPORATOR COIL

Rows Fins/in.

Face Area (sq ft)

EVAPORATOR FAN

Quantity Size (in)

Type Drive

Nominal Cfm

Maximum Continuous Bhp

Motor Frame Size

Fan Rpm Range

Motor Bearing Type

Motor Pulley Pitch Diameter Min (in.)

Motor Pulley Pitch Diameter Max (in.)

Fan Pulley Pitch Diameter (in.)

Nominal Motor Shaft Diameter (in)

Belt. Pitch Length (in)

Belt. Type

Pulley Center Line Distance Min (in)

Pulley Center Line Distance Max (in)

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

1895

149

Enhanced Copper Tubes, Aluminum Lanced Fins, Face Split

217

28.6

217

30.2

Copper Enhanced Tubes with Atuminum Lanced Fins

1 17

22.2

Propeller

324

12,500

_/3

1100

Enhanced Copper Tubes, A_uminum Double-Wavy Fins, Face Sp_it

315

22.2

Centrifugal Type, Belt Drive

1. 15x15, 1 ..12x12

Belt

8000

525

S215T

7t0- 879

872-1066

1068-1280

Ball

4.2

5.2

6.2

10.2

8.5

7/8

t3!_

49.3

47.8

43.8

14.2

18.8

8.6

10.8

14.2

TXV

15.5

15.0

45.5

18.8

18.7

18.8

54.3

24O

36O

Fully Hermetic Scroll

Copeland 3MA

R-4t 0A (Puron® Refrigerant)

Table 1-- Physical Data (cont)

BASE UNIT 48PG

Speed Change (rpm)

Movab{e Turns

Factory Pulley Setting (rpm)

Fan Shaft Diameter at Rutiey (in.)

GAS HEAT SECTION

Rollout Switch

Open Temperature (F)

Closed Temperature (F)

Gas Input (Btuh) Stage l/Stage 2

Burner Orifice Diameter (in..drill size)t

Natural Gas

Liquid Propane

Thermostat Heat Anticipator Setting (amps)

First Stage

Second Stage

Manifo{d Pressure (in wg)

Natural Gas

Liquid Propane

Gas Valve Quantity

Gas Supply Pressure Range (in wg)

Field Gas Connection Size (in.)

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto.)

RETURN-AIR FILTERS

Quantity Size (in)

LEGEND

TXV Thermostatic ExpansionValve

*Aluminum Evaporator Coil/Aluminum Condenser Coil.

tFor applications less than 2000 ft elevation.

Low

Mid-Low

High

Low

Mid-Low

High

Low

Mid-Low

High

Low

Med

High

Low

Med

High

PGD/L

PGE/M

PGF/N

812

983

1191

13/16

195

115

176,000/220,000

248,000/310,000

320,000/400,000

Std 0.1285.30

AIt 0.1015.88

Std 30

AIt 80

5.0-13.0

3/4

660 + 10

505 + 20

Throwaway

8 .20x20x2

Hook rigging shackles through holes in base rail, as shown in

DetailA. Holes in base rails are centered around the unit

center of gravity. Use wooden top skid, when rigging, to

prevent rigging straps from damaging unit.

UNIT A B C DEMAX, WEIGHT

SIZE in, mm in. mm in, mm in. mm in. mm Ib k_

16 100.4 2550 36 54 914 1371 52.4 1331 5%0 1295 350 889 1959 890

Fig. 2 - 48PG Rigging Label

(;06229

Installation Onto Curb

The 48PG units are designed to fit on the accessory full perimeter

curb. Correct placement of the unit onto the curb is critical to

operating performance. To aid in correct positioning, place unit

on roof curb to maintain 1/4-in. gap between the inside of rail and

roof curb on long sides and a l/2-in, gap between the inside of rail

and roof curb on both duct and condenser ends. Refer to Fig. 1

and 3, to assure proper duct opening alignment.

NOTE: Before positioning unit on curb. make sure bottom drain

connection plug is tight. See Step 6 -- Install External Trap for

Condensate Drain concerning bottom drain connection plug.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage.

Do not slide unit to position when it is sitting on the curb.

Curb gasketing material may be damaged and leaks may

result.

Step 3 --Field Fabricate Ductwork

On vertical units, secure all ducts to roof curb and building

structure. Do not connect ducm'ork to unit. 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 pressure (a negative condition) shall not exceed

0.35 in. wg with economizer or 0.45 in. wg without economizer.

These units are designed for a minimum continuous return-air

temperature in heating of 50°F (dry bulb), or an intermittent

operation down to 45°F (dry bulb), such as when used with a

night set-back thermostat.

To operate at lower return-air temperatures, a field-supplied

outdoor-air temperature control must be used to initiate both

stages of heat when the temperature is below 45°F. Indoor

comfort may be compromised when these lower air temperatures

are used with insufficient heating temperature rise.

Step 4 --Make Unit Duct Connections

Vertical Supply/Return Configuration

Unit is shipped in vertical supply/return configuration. Ductwork

openings are shown in Fig. 1 and 3. Attach the ductwork to the

roof curb. Do not attach duct directly to the unit.

UNIT DAMAGE AND PERSONAL INJURY

HAZARD

Failure to follow this warning could cause equipment

damage and/or personal injury.

For vertical supply and return units, tools or parts could

drop into ductwork and cause an injury. Install a

90-degree turn in the return ductwork between the unit

and the conditioned space. If a 90-degree elbow cannot

be installed, then a grille of sufficient strength and

density should be installed to prevent objects from

falling into the conditioned space.

Horizontal Applications

Horizontal units are shipped with an outer panel that allows for

side by side horizontal duct connections. If specified during

ordering, the unit will be shipped withe the vertical duct openings

blocked off from the factory, ready for side supply installation. If

the horizontal supply/return option was not specified at time of

ordering the unit, a field-installed accessory kit is required to

convert the vertical unit into a horizontal supply configuration.

NOTE: Follow instructions provided with accessory kit.

Installation of the duct block-off covers should be completed

prior to placing the unit unless sufficient side clearance is

available. A minimum of 66 in. is required between the unit and

any obstruction to install the duct block-off covers. Install

ductwork to horizontal duct flange connections on side of unit.

Step 5--Install Flue Hood and Inlet Hood

Flue hood (smaller hood), inlet hood (larger hood), and screens

are shipped inside the unit in the gas section. To install, open the

heat section door. The flue hood is attached to the heat section

panel from the outside using the screws provided. (See Fig. 4 and

5.)

The inlet hood is installed by inserting the hood through the back

of the heat panel. Attach the hood by inserting the screws

provided through the clearance holes in the heat panel and into

the intake hood.

NOTE: When properly installed, the flue hood will line up with

the combustion fan housing. (See Fig. 6.)

_OIES

I WE:6HTS SHOWN ARE FOR 48PG I_I ilEAT)UN[T

W:TH ALU_[NU_ CO:LSAND STANDARR DRIVE

EOR WRIGHTS OR OPTIONAL [OU:PMEN: ¸ CONSULT

PRODUCT DAIA BOOK

R BO NOT LOCATE ADJACENT UNITS W[TIi ELUE B[SCHARGE

EARING ECO_ONIZER [I_[E:

3 _INIMUN CLSARANCE ([ORAL CODES OR JUSISO[CTIONS MAT PRRVAI])

:RONT 48 INCHES TO CO_RUST:CL_ SURFACES [18 [NC_ES _RN

US:NG ACCESSORY ELD[ RiSCHARGR REFLECTOR)¸

b _HEC ROT USINO ROOf CURB I: I_CH} RO[lO_ OF BASE RAN lO

CO_BUST:B[R RDREACES

_HER NO: USINB ROOF CURB {0 INCHES1 i0 ROTTO_ OF BASE RA:L

R:BRT S:D[FRBNT AND _AC_ SIDES 136 :NCiIESI :OR PROPER

CONDENSER A:RFEOW

d OVERHEAR 160 INCHES)iO ARSUR_ PRORER CONDENSER AIRFLOW

_ REIWREN UN[_S, CONIROL BOX SIDE, 4Z IN PER NEC

[ BETWI:_N UN[i A_B UNOROUNCED SURFACE CONTROL BOX SERE

136 INCHES PER NEC)

g RETW[RN UNIT ANO BROCK BE RBNCRETR _ALI ANR OTHER

GROUN_ER SURFACES CONTROL _OX S:RE 142 INRFRSI PER NEC

_ CLEARANCE IN FRONT OT INDOOR _0iOR ACCESS FOR BLOWER SLED

RfMBVAL 8_ _

: CIRARANC[ fOR CONPLRTE CONDENSATE PAN RR_OVAL 7"8

_ ON UNITS WITH _CONO_[RER AL{BW 4"0" IRO_ LEfl SlOE

EOR SERVICE ACCESS TO ECONOMIZER¸

m IIORIZONTA[ SUPPL¥ AND REtURN,TO INCHES)

4 DOWN SilOT DUCTS RESIGNED TO BR ATTACHE_ TO ACCESSORT

ROOF CRRO ONLY¸ if UNII :S MOUNI[_ SlOE SUPPLY [[

[S RRCOMMRNDED THE _UCIS _USI BE SDPPORIED BY

CROSS BRACES AS RONE ON ACCESSORY ROOF CURB

R D:_ENS:ONS IN I ARE [N _ILI[_ETE£S OR _ILOGRAMS

_ _IIIL T_I[E_CERI:ON OT CLEARANCE FOR :_[ CO_OENSER COIL,

COM_DSTI_IE SURTACRS AND TI4EDAMPER/POWER EXHAUST AS

STATRD IN NOTR _R A REMOVAC[{ FENCE OR _ARR[CADR

REQUIRES NO CleARANCE

f OIMENS:ONS ARE iROM OUISIOE OE CASE RAIL

ALIO_ O ¸ 5/16 [81 ON EACH SlOE FOR tOP COVER DRIP EBGR

8 UNITS _AY BE [NS:AIIED ON CO_B_ST[BLE E[OORS _AR_ IRO_

CLASS A,B,C ROOF COVERING MATERIAL :F SET ON CASE RAILS¸

CENTER O_ GRAVIIT

Im4_I_[RECT[ON OF A[R FIO_

R 5M6"

{135 O]

4" 5 IWl_"

1_363 51

@[59 81

POWRRRUP£17

_NOR_OUT

(THRU CURB}

11 53/4'

134993]

IINCL@E8

WITH UNTil

797/8"

[86141

:" 55/S" I

65/8"

R R 3/4' {168 O}

[6DO 0}

[4480]r- 1: CONBENSAIE

I_ARRERS ROVER

TTR

REAR

6 1/4"

[/586]_

8114"

[513 8] ///_

l'flP {18S 61

[380 8]

R/_'f!'3/16'<

6 7/8'

[1_4/173]

7 13//6"

[183 3]_

R RIB"

[5_6]

TYR

:7P

R1R/T6'

[2234 l] .....................

[NSIOE RAILS

LEFT SIDE

BAROMRTRIC REIEIE

(:NCLUDED W:TH UNIT)

POWER _XBAUST

_POWER SUPPLY ORERAIING POS:FION

ACCESS COVER (OPiION)

4 1/2" l 91/4"

£ 4 9/16" {114 7]_ [2568 O]

CONIT{NSER COlE

_ ACCESS DOOR _ 15 _/611

gg_ ............ .............

[<,OR

;OO i :::=::::::3" _ OOi) T:7/C_ ' ' ?

RETURN SUPPIf _N AT S CTION

L A:R AC(ESSDOOR RICHT SIDE

ACCRSS DOOR

C 1 51}6'

.........................................[R7Z7 O]

:NSIOE RAILS

FRONT

Fig. 3 - Base Unit Dimensions

13//G"

[30 8i

4' Z 1R/16 ¸¸

[:2934]

(107056

FLUE HOOD INLET HOOD

°1

GAS SECTION

ACCESS DOOR

Fig. 4 - Flue and Inlet Hood Locations

C06230

Step 6 --Install External Trap for Condensate

Drain

The unit's 3/4-in. condensate drain connections are located on the

bottom and side of the unit. Unit discharge connections do not

determine the use of drain connections: either drain connection

can be used with vertical applications. See Fig. 3 for locations.

When using the standard side drain connection, make sure the

plug (red) in the alternate bottom connection is tight before

installing the unit. (See Fig. 7.)

To use the bottom drain connection for a roof curb installation.

relocate the factory-installed plug (red) from the bottom

connection to the side connection. A 1/2-in. socket extension can

be used to remove the plug. (See Fig. 7.) The piping for the

condensate drain and external trap can be completed after the unit

is in place.

All units must have an external trap for condensate drainage.

Install a trap at least 4-in. deep and protect against freeze-up. If

drain line is installed downstream from the external trap, pitch the

line away from the unit at 1 in. per 10 ft of run. Do not use a pipe

size smaller than the unit connection (3/4-in.). (See Fig. 8 and 9.)

The 48PG units are provided with a removable condensate pan

for ease of cleaning. It is recommended that a union be placed

between the unit and condensate drainage to ease the removal of

the pan during servicing. Adequate clearance should be allowed if

removal of condensate pan is required. Allow 64-in. between

condensate pan access panel and any obstruction for complete

removal.

ECON( ,MIZER HOODS

OUTDOOR AIR

SCREENS

CONDENSER

COIL ACCESS

PANEL

BAROMETRIC

RELIEF DAMPER

HOODS

ELECTRICAL"

OPTIONS

PANEL

ELECTRIC

HEAT ACCESS

PANEL

FILTER

ACCESS DOOR

BASEPAN CONTROL BOX

CONNECTIONS AND COMPRESSOR

ACCESS PANEL ACCESS DOOR

Fig. 5 - Panel and Filter Locations

C06309

MOTOR

MAIN GAS

HEAT COMBUSTION MAIN

EXCHANGER FAN HOUSING BURNER

SECTION SECTION

Fig. 6- Typical Gas Heating Section

C06232

SIDEDRAIN

PLUG

222................

BOTTOMDRAIN

PLUG

C06233

Fig. 7 -Condensate Drain Pan

Step 7 --Orifice Change

This unit is factory assembled for heating operation using natural

gas at an elevation from sea level to 2000 ft. This unit uses orifice

type LH32RFnnn, where "nnn" indicates the orifice size based on

drill size diameter in thousands of an inch.

High Elevation (Above 2000 ft)

Use accessory high altitude kit when installing this unit at an

elevation of 2000 to 7000 ft. For elevations above 7000 ft, refer

to Table 2 to identify the correct orifice size for the elevation. See

Table 3 for the number of orifices required for each unit size.

Purchase these orifices from your local Carrier dealer. Follow

instructions in accessory Installation Instructions to install the

correct orifices.

Table 2--Altitude Compensation*

ELEVATION (ft) NATURAL GAS ORIFICE1"

0-1,999 30

2,000 30

3,000 31

4,000 31

5,000 31

6,000 31

7,000 32

8,000 32

9,000 32

10,000 35

11,000 36

12,000 37

13,000 38

14,000 39

*As the height above sea level increases, there is less oxygen per cubic

foot of air. Therefore, heat input rate should be reduced at higher alti-

tudes. Includes a 4% input reduction per each 1000 ft.

1-Orifices available through your Carrier dealer.

Table 3--Orifice Quantity

ORIFICE

UNIT QUANTITY

Low Heat (48PGD/L) 5

Medium Heat (48PGE/M) 7

High Heat (48PGF/N) 9

Conversion to Propane Gas

Use accesso_ propane gas conversion kit when converting this

unit for use with propane fuel usage for elevations up to 7000 ft.

For elevations above 7000 ft, refer to Table 4 to identify the

correct orifice size for the elevation. See Table 3 for the number

of orifices required for each unit size. Purchase these orifices from

your local Carrier dealer. Follow instructions in accesso_

Installation Instructions to install the correct orifices.

Table 4--Propane Gas Conversion*

PROPANE GAS

ELEVATION (ft) ORIFICE1"

0-1,999 38

2,000 40

3,000 40

4,000 41

5,000 41

6,000 42

7,000 42

8,000 43

9,000 43

10,000 44

11,000 44

12,000 45

13,000 46

14,000 47

*As the height above sea level increases, there is less oxygen per cubic

foot of air. Therefore, heat input rate should be reduced at higher atti-

tudes. Includes a 4% input reduction per each 1000 ft.

1-Orifices available through your Carrier dealer.

Step 8 --Install Gas Piping

Unit is equipped for use with natural gas. Refer to local building

codes, or in the absence of local codes, to ANSI Z223.1-1atest

year and addendum Z223.1A-latest year entitled HFGC. In

Canada, installation must be in accordance with the

CAN1.B149.1 and CAN1.B149.2 installation codes for gas

burning appliances.

Support gas piping as shown in the table in Fig. 10. For

example, a 3/4-in. gas pipe must have one field-fabricated support

beam every 8 ft. Therefore. an 18-ft long gas pipe would have a

minimum of 3 support beams. See Fig. 10 for typical pipe guide

and locations of external manual gas shutoff valve.

Install field-supplied manual gas shutoff valve with a l/8-in. NPT

pressure tap for test gage connection at unit. The pressure tap is

located on the gas manifold, adjacent to the gas valve. Field gas

piping must include sediment trap and union. (See Fig. 11.)

Install a field-supplied gas regulator.

UNIT DAMAGE AND PERSONAL INJURY

HAZARD

Failure to follow this warning could result in damage to

equipment and/or personal injury.

Do not pressure test gas supply while connected to unit.

Always disconnect union before servicing. High

pressures can cause gas valve damage resulting in a

hazardous condition.

IMPORTANT: Natural gas pressure at unit gas connection must

not be less than 5.0 in. wg or greater than 13.0 in. wg for all heat

sizes.

Size gas-supply piping for 0.5-in. wg maximum pressure drop.

Do not use supply pipe smaller than unit gas connection.

Step 9 --Make Electrical Connections

(For more details, refer to the Controls, start-up, operation, and

troubleshooting manual)

Field Power Supply

All 208/230-v units are factory wired for 230-v power supply. If

the 208/230-v unit is to be connected to a 208-v power supply,

transformers (TRAN1 and TRAN2) must be rewired by moving

the black wire with the l/4-in, female quick connect from the

230-volt connection and moving to the 200-volt l/4-in, male

terminal on the primary side of the transformer.

Refer to unit label diagram for additional information. Leads are

provided for field wire connections. Use UL (Underwriters

Laboratories) approved copper/aluminum connector.

When installing units, provide disconnect per NEC (National

Electrical Code) Article 440 or local codes. For non-fused

disconnects, size the disconnect according to the sizing data

provided in the electrical data tables. If a fused disconnect is used,

determine the minimum size for the switch based on the

disconnect sizing data provided in the electrical data tables and

then coordinate the disconnect housing size to accommodate the

Maximum Overcurrent Protection (MOCP) device size as marked

on the unit informative plate. (See Tables 5 and 6.) All field

wiring must comply with NEC and local codes. Size wire based

on MCA (Minimum Circuit Amps) on the unit informative plate.

See Fig. 12 for power wiring connection to the unit leads and

equipment ground.

Route power and ground lines through control box end panel or

unit basepan (see Fig. 3) to connections as shown on unit wiring

diagram and Fig. 12. Factory leads may be wired directly to the

disconnect.

UNIT DAMAGE HAZARD

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

The correct power phasing is critical to the operation of the

scroll compressors. An incorrect phasing will result in an

alarm being generated and compressor operation lockout.

Should this occur, power phase correction must be made to

the incoming power.

CONDENSATE

PAN ACCESS

PANEL

OPTIONALUNIONS

TOALLOWFORCONDENSATE_

PANREMOVAL _

Fig. 8 -External Trap for Condensate Drain

C06234

MINIMUMPITCH _-'_t. --

I I _ DRAINPLUG

SEE

NOTE

_..ROOF

CURB

NOTE: Trap should be deep enough to offset maximum unit static difference

A 4-in. trap is recommended.

C06291

Fig. 9 - Condensate Drain Piping Details

F X *,--

9" MINIMUM CLEARANCE

_ SHuToPANELREMOVAL {

MANUAL GAS GAS .d

FF VALVE* REGULATOR_ I

R__ DRIP LEG PER NFGC_

BASE ROOF CURB

FIELD-FABRICATED

SUPPORT*

FROM GAS METER

LEGEND

NFGC -- National Fuel Gas Code

*Field supplied.

NOTE: Follow all local codes.

SPACING OF SUPPORTS

STIEEL P,PE ]{ SPACING OF SUPPOBTS

NOMINAL DIAMETER (in.) X DIMENSION (ft)

1/2 _ 6

3/4 Or 1 8

11/4 Or larger 10

C06115

Fig. 10 - Gas Piping Guide (With Accessory

Thru-the-Curb Service Connections)

MANUALSHUTOFF

(FIELDSUPPLIED) "_ r'F1

_'_ SUPPLY

PRESSURETAP

(1/8" NPT PLUG)

LINIT UNO__N _- '_----- SEDIMENTTRAP

C06236

Fig. 11 - Field Gas Piping

zLU

Z Z

OCt

©LU

£3

Jm[

FIELD _ FACTOR

POWER

WIRING ff:_ WIR!_G

C.A1

EQUIP GND

C06237

Fig. 12 - Field Power Wiring Connections

ELECTRICAL SHOCK AND FIRE HAZARD

Failure to follow this warning coud result in electrical

shock, fire. or death.

The cabinet MUST have an uninterrupted or unbroken

ground according to NEC ANSI/NFPA 70-2002 and

Canadian Electrical (:ode CSA C22.1 or local codes to

minimize personal injury if an electrical fault should

occur. This may consist of electrical wire or conduit

approved for electrical ground when installed in

accordance with existing electrical codes. Do not use

gas piping as an electrical ground.

Field wiring must conform to temperature limitations for type

"T" wire. All field wiring must comply with NEC and local

requirements.

Operating voltage to compressor nmst be within voltage range

indicated on unit nameplate. Voltages between phases must be

balanced within 2%.

Unit failure as a result of operation on improper line voltage or

excessive phase imbalance constitutes abuse and may cause

damage to electrical components.

Field Control Wiring (Units Without Optional

Humidi-MiZer TM Adaptive Dehumidification System)

Unit can be controlled with either a Carrier-approved accessory

thermostat or a Carrier-approved space temperature sensor. Install

thermostat according to the installation instructions included with

accessory. Locate thermostat assembly or space temperature

sensor on a solid interior wall in the conditioned space to sense

average temperature.

Route thermostat or space temperature sensor cable or equivalent

single leads of colored wire from subbase terminals through

conduit into unit to low-voltage connections as shown on unit

label wiring diagram and in Fig. 13 or 14.

NOTE: For wire runs up to 50 ft. use no. 18 AWG (American

Wire Gauge) insulated wire (35 °C minimum). For 50 to 75 ft, use

no. 16 AWG insulated wire (35°C minimum). For over 75 ft, use

no. 14 AWG insulated wire (35°C minimum). All wire larger

than no. 18 AWG cannot be directly connected at the thermostat

and will require a junction box and splice at the thermostat.

Set heat anticipator settings as follows:

STAGE 1 STAGE 1 AND 2

VOLTAGE (Wl) ON (Wl AND W2) ON

All 0.14 0.20

Settings may be changed slightly to provide a greater degree of

comfort for a particular installation.

::: ): :,

::C(' T( :: t,,t

C06292

Fig. 13 - Field Control Thermostat Wiring

T-56 SPT

SEN SET

JUMPER

SPT -- Space Temperature Sensor

Fig. 14 - Field Control Space Temperature

Sensor Wiring

C06239

Field Control Wiring (Units With Optional Humidi-MiZer TM

Adaptive Dehumidification System)

Units require temperature control inputs for cooling and heating

operation and humidity control inputs for Humidi-MiZer

operation.

Temperature Control

The unit can be controlled with either aCarrier-approved space

temperature sensor, a Carrier accessory Thermidistat TM device, or

a Carrier-approved accessory thermostat. Install the temperature

control device according to the installation instructions included

with the accessory. Locate the device on a solid interior wall in

the conditioned space to sense average temperature. Carrier space

temperature sensor wiring connections are shown in Fig. 14.

General thermostat field control wiring connections are shown in

Fig. 13. Carrier Thermidistat device wiring connections are

shown in Fig. 15. Configuration of the unit control is required to

specify the control input type before unit operation.

Route thermostat or space temperature sensor cable or equivalent

single leads of colored wire from subbase terminals through

conduit into unit to low-voltage connections as shown on unit

label wiring diagram and in Fig. 13-15.

THERMIDISTAT

TBI

DUE c DDD

I I I I I I I I I

RUMIDISTAT

ROOFTOP UNIT

C07055

Fig. 15 - Field Control Thermidistat Wiring

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American

Wire Gauge) insulated wire (35 °C minimum). For 50 to 75 ft, use

no. 16 AWG insulated wire (35°C minimum). For over 75 ft, use

no. 14 AWG insulated wire (35"_C minimum). All wire larger

than no. 18 AWG cannot be directly connected at the thermostat

and will require a junction box and splice at the thermostat

Set heat anticipator settings as follows:

VOLTAGE STAGE 1 STAGE 1 AND 2

(Wl) ON (Wl AND W2) ON

All 0.14 0.20

Settings may be changed slightly to provide a greater degree of

comfort for a particular installation.

Humidity Control

Unit can be controlled with either a Carrier accessory

Thermidistat device or a Carrier-approved accessory humidistat

(switch output). The input for an accessory humidity sensor with

4 to 20 mA output is another option available when an

economizer board is installed. Install the humidity control device

according to the installation instructions included with the

accessory. Locate the device on a solid interior wall in the

conditioned space to sense average humidity. Carrier Thermidistat

device wiring connections are shown in Fig. 15. General

humidistat wiring connections are shown in Fig. 16.

Configuration of the unit control is required to specify the control

input type before unit operation. Refer to the controls, start-up,

operation and troubleshooting manual for configuration.

Units with the Humidi-MiZer option receive a discrete input from

a field-installed device (such as from the Carrier humidi-stat or

Thermidistat device). The discrete input is connected to the TB1

terminal strip points labeled Humidistat 1 and 2. As this is a

discrete input, one of the connection points is for power to the

switch and the other is the return path. (See Fig. 16.)

A space relative humidity sensor input (SP.RH) is only available

if an economizer board (ECB) is installed in the unit and then the

sensor can be connected to the OAQ point TB1-4. (See Fig. 16.)

This input is used instead of the discrete humidistat or

thermidistat inputs. The input controls the Humidi-MiZer using

the 4-20mA as percent humidity. The relative humidity value

(measured by the relative humidity sensor) can be displayed on

the Scrolling Marquee, in the space through a System PiloU"

device, or can be read by other CCN devices where it can be used

to perform more advanced functions. The humidity sensor must

be configured correctly; refer to the Controls, start-up, operation,

and troubleshooting manual for details.

If the customer also wishes to install a smoke detector into a

Humidi-MiZer equipped 48PG unit. the fire shutdown

connection points are on Plug PL-19, located in the economizer

section. See the unit wiring schematic for wiring. For third-party

smoke detector, refer to Fig. 17.

Point 19-3 is the 24 vac power source for the detector. Point 19-4

is 24 vac power for the indoor fan contactor control. Point 19-5 is

the 24 vac signal input for fire shutdown. If an immediate fan

shutdown is desired, install a normally closed contactor between

19-3 and 19-4.

I I

J I

HUMIDITY SENSOR OR HUMIDISTAT

Fig. 16 - Humidi-MiZer Low-Voltage Terminal Strip -Humidity Sensor/Humidistat Wiring

C07045

Pk19

smoke _[-:

Detector' @ N

(SPOT) ; _ )-

48PG_

Humldi;-MiZer

RTU

Fig. 17 - Third-Party Smoke Detector

C07046

More information is available in the third party control section of

the controls, start-up, operation, and troubleshooting manual.

Step 10 --Install Outdoor-Air Hoods (Units with

Economizer)

Perform the following procedure to install the outdoor-air hoods:

1. Economizer and barometric relief hoods are located in the

condenser section under the slanted cnil fnr shipping. (See

Fig. 18.) Barometric relief/power exhaust hoods are

shipped inside of economizer hoods. Remove screws that

secure the wooden rails of the hood assemblies to the unit.

Save screws. Slide complete assembly from condenser

section.

2. Remove the screws that secure the economizer and

barometric relief/power exhaust hoods to the wooden

railing. Discard or recycle wooden rails. Save screws.

3. The barometric relief dampers are secured to the

economizer panel for shipping. Remove the screw holding

the barometric relief damper to the panel for each damper.

Dampers should be free to swing open during operation.

(See Fig. 19.)

4. Hang the barometric relief/power exhaust hood on the

mounting flange on the economizer panel. Secure hood to

panel with screws saved from Step 2. Repeat for second

hood. (See Fig. 19 and 20.)

5. Align hole in flange of economizer panel with left edge of

hood. Hang economizer hood on the top flange of the

economizer panel by rotating hood until top flange of the

economizer hood engages the bent flange on the

economizer panel. Rotate hood until hood is flush with the

economizer panel. Hood will support itself from flange.

Align holes in hood with holes in panel and secure hood

to panel with screws saved from Step 2. Repeat for second

hood. (See Fig. 19 and 21.)

6. Loosen screws securing clip on top of the flange of each

opening. Rotate clip 180 degress and tighten screw.

Install l-in. filter provided by inserting under the clip on

the flange and letting filter drop behind bracket holding

barometric relief hoods. Repeat for second hood. Install

baffle between the outdoor air hoods with screws saved

form Step 1. (See Fig. 19.)

Step 11 --Install All Accessories

After all of the factory-installed options have been adjusted,

install all field-installed accessories. Refer to the accessory

installation instructions included with each accessory.

Step 12 --Configure Controls

Refer to unit Controls and Troubleshooting book for information

on configuring controls.

POWER EXHAUST/

BAROMETRIC

MOUNTING /

FLANGE

POWER EXHAUST/

BAROMETRIC

RELIEF HOOD

nECONOMIZER

WOODEN RAILS HOOD

Fig. 18 - Economizer and Barometric

Relief/Power Exhaust Hoods Shipping Positions

C06290

BAFFLE

ECONOMIZER

HOODS

XHAUST/

ECONOMIZER _ i BAROMETRIC

PANEL BAROMETRIC RELIEF RELIEF HOODS

DAMPER SCREW (TYP)

C06261

Fig. 19 -Hood Installation

Fig. 20 - Barometric Relief/Power Exhaust

Hood Flange

MOUNTING

FLANGE

ECONOMIZER

HOOD

Fig. 21 - Economizer Flange

(;06262

(;06263

Table5--Electrical Data -- Units Without Optional Convenience Outlet

NOMINAL

UNIT POWER

48PG SUPPLY

(V-Ph-Hz)

208/230-3-60

16 460-3-60

575-3-60

VOLTAGE COMPRESSOR OFM COMBUTION

RANGE No. 1 No. 1 No. 1 FLA FAN

FLA MOTOR

Min Max RLA LRA RLA LRA RLA LRA Qty (ea) FLA

187 253 18.1 137 18.1 137 17.6 123 3 1.9 0.52

414 506 9.0 62 9.0 62 7.7 50 3 1.0 0.30

518 633 6.8 50 6.8 50 6.1 40 3 0.8 0.24

PWR

EXH

FLA*

3.0

1.2

3.0

POWER

IFM IFM SUPPLY

TYPE FLA MCA MOCP

Low 10.2 74.2/74.2 90/90

_'_ 15.0 79.0/79.0 90/90

Hioh 19.4 83.8/63.8 100/100

Low 10.2 77.2/77.2 90/90

_'_ 15.0 82.0/82.0 100/100

High 19.4 86.8/66.8 100/100

I ow 4 8 35 8 40

_ni$ 7.4 38.4 45

Hinh 9 7 40 8 50

Lo_w 4.8 37 45

_7.4 39.6 45

High 9,7 42 50

Low 2.8 26.6 30

_V_dA] 5.6 29.4 35

High 7.8 31.9 35

I ow P 8 P9 6 35

_ 5.6 32.4 35

Hiah 7,6 34,9 40

DISCONNECT

SIZE

FLA LRA

80/80 482/482

86/86 491/491

91/91 529/529

84/84 486/486

89/89 495/495

94/94 533/533

39 917

42 221

44 940

40 220

43 224

46 243

29 168

32 182

34 197

39 179

35 186

38 201

LEGEND

FLA - Full Load Amps

HACR - Reating, Air Condltioning and Refrigeration

IFM -indoor (Evaporator) Fan Motor

LRA - Looked Rotor Amps

MCA - MinimumCircuitAmps

MOCP- MaximumOvercurrentProtection

NEC -National E]eotdcal Code

OFM - Outdoor (Condenser) Fan Motor

RLA -Rated Load Amps

* Power exhaust FLA is the sum of the FLA of two power exhaust motors

NOTES:

1 In compliance with NED requirements for multimotor and combination load equip-

ment (refer to NEC Articles 430 and 440), the overcurrent protective device for the

unit shall be fuse or HACR breaker Canadian units may be fuse or circuit breaker

2 Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than

2% Use the following formula to determine the percentage of voltage imbalance

max voltage deviation from average voltage

% Voltage Imbalance = 1 go x

average voltage

Example: Supply vo{tage is 460-3-60

,_ B c

Determine maximum deviation from average voltage

(AB) 227 223 3 v

(BC) 231 227 4v

(AO) 227 226 1 v

Maximum deviation is 4v

Determine percent of voltage imbalance

%Voltage imbalance = 1 go x

= 1 76%

227

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric

utility company immediately

Table 6---Electrical Data -- Units With Optional Convenience Outlet

UNIT

48PG

NOMINAL

POWER

SUPPLY

(V-Ph-Hz)

208/230-3-80

460-3-80 414 506 9,0 82

575-8-80 518 883 8,8 50

VOLTAGE COMPRESSOR OFM COMBUTION

RANGE No. 1No. 1No. 1FLA FAN PWR

FLA MOTOR EXH

Min Max RLA LRA RLA LRA RLA LRA Qty (ea) FLA FLA*

187 253 18.1 137 18.1 137 17.6 123 3 1.9 0.52

9,0 82 7.7 50 31.0 0.30

8.8 50 8.1 40 3 0.8 0.24

LEGEND

FLA - Full Load Amps

HACR - Heating, Air Conditioning and Refrigeration

IFM -indoor (Evaporator) Far) Motor

LRA - Locked Rotor Amps

MCA - MinimumCircuitAmps

MOCP- MaximumOvercurrentProtaction

NEC - National Eleotdcal Code

OFM - Outdoor (Condenser) Fan Motor

RLA - Rated Load Amps

* Power exhaust FLA. is the sum of the FLA of two power exhaust motors

NOTES:

1in compliance with NEC requirements for multimotor and combination load equip-

ment (refer to NEC Articles 430 and 440), the overcurrent protective device for the

unit shall be fuse or HACR breaker Canadian units may be fuse or circuit breaker

2 Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than

2% Use the following formula to determine the percentage of voltage imbalance

max voltage deviation from average voltage

% Voltage Imbalance 1 go x

average voltage

IFM IFM

TYPE FLA

POWER

SUPPLY

MCA MOCP

Low 10,2 79.0/79.0 90/90

Mid-Low 15,0 83.8/83.8 100/100

High 19,4 88.8/88.8 100/100

Low 10,2 82.0/82.0 100/100

3,0 Mid-Low 15,0 86.8/86.8 100/100

High 19,4 91.8/91.8 100/100

DISCONNECT

SIZE

FLA LRA

86/ 86 487/487

91/ 91 498/496

96/ 98 534/534

89/ 89 491/491

95/ 95 500/500

!00/!00 538/538

Low 4,8 38,0 45

Mid-Low 7,4 40,6 45

High 9,7 43,0 50

Low 4,8 39,2 45

1,2 Mid-Low 7,4 41,8 50

High 9,7 44,2 50

Low 2,8 28,3 35

Mid-Low 5,6 31,1 35

High 7,8 33,6 40

Low 2.8 31,3 35

3,0 Mid-Low 5,6 34,1 40

Hiqh 7,8 36,6 40

41 219

44 223

47 242

42 222

45 228

48 245

31 170

34 184

38 199

34 174

37 188

40 203

Example: Supply vo{tage is 460-3-60

,_ e c

Determine maximum deviation from average voltage

(AB) 227 223 3 v

(BC) 231 227 4v

(AO) 227 226 1 v

Maximum deviation is 4v

Determine percent of voltage imbalance

% Voltage imbalance 1 go x

1 76%

227

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric

utility company immediately

Manufacturer reserves the right to change_ at any tirne_ specifications and designs without notice and without obligations.

Catalol_ No:48PG-26SI

Replaces:48PG - 23SI

CARRIER Package Units(both Units Combined) Manual L0703136

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