Carrier 48Vg A Owners Manual OM48VG 02

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1

48VG---A and 48VG---B

Performance™ 15 and 16 SEER

2---Stage Packaged Air Conditioner and Gas Furnace

System With Puronr(R---410A) Refrigerant

Single and Three Phase

2 --- 5 N o m i n a l To n s ( S i z e s 2 4 --- 6 0 )

Owner’s Information Manual

A09033

Fig. 1 -- Unit 48VG--A, 48VG--B

NOTE TO EQUIPMENT OWNER:

For your convenience, please record the model and serial numbers of your new equipment in the spaces

provided. This information, along with the installation data and dealer contact information, will be helpful

should your system require maintenance or service.

UNIT INFORMATION

Model # _____________________________________

Serial # ______________________________________

ACCESSORIES (List type of model #)

_____________________________________________

_____________________________________________

_____________________________________________

INSTALLATION INFORMATION

Date Installed________________________________

DEALERSHIP CONTACT INFORMATION

Company Name_______________________________

Address______________________________________

_____________________________________________

Phone Number _______________________________

Technician Name _____________________________

_____________________________________________

NOTE TO INSTALLER:

This manual must be left with the equipment owner.

2

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service maintenance,

or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory--authorized kits or accessories

when modifying this product. Refer to the individual instructions

packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Have a fire extinguisher available. Read these

instructions thoroughly and follow all warnings or cautions

included in literature and attached to the unit. consult local

building codes, the current editions of the National Fuel Gas Code

(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code

(NEC) NFPA 70.

In Canada refer to the current editions of the National Standards of

Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane

Installation codes, and Canadian Electrical Code CSA C22.1

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 serious hazards which will result in severe personal injury

or death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify unsafe

practices which may result in minor personal injury or product and

property damage. NOTE is used to highlight suggestions which

will result in enhanced installation, reliability, or operation.

NOTE: Installer: This manual should be left with the equipment

user.

FIRE, EXPLOSION, ELECTRICAL SHOCK

HAZARD

Failure to follow this warning could result in personal

injury, death or property damage.

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.

!WARNING

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

Do not store or use combustible materials, gasoline, or other

flammable vapors and liquids in the vicinity of this or any

other appliance.

!WARNING

FIRE, EXPLOSION, ELECTRICAL SHOCK

HAZARD

Failure to follow this warning could result in personal

injury, death or property damage.

Do not use this unit if any part has been under water.

Immediately call a qualified service technician to inspect the

unit and to replace any part of the control system which has

been under water.

!WARNING

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

What to do if you smell gas:

1. Do not try to light any appliance.

2. Do not touch any electrical switch; do not use any phone

in your building.

3. Leave the building immediately.

4. Immediately call your gas supplier from a nearby phone.

Follow the gas supplier’s instructions.

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

department.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury and/or death.

Before performing recommended maintenance, be sure the

main power switch to unit is turned off and lock--out tag is

installed. There may be more than one disconnect switch.

!WARNING

FIRE, EXPLOSION, ELECTRICAL SHOCK

HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

1. Do not turn off the electrical power to unit without first

turning off the gas supply.

2. Before attempting to start the gas heating section,

familiarize yourself with all the procedures that must be

followed.

!WARNING

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

Do not attempt to light by hand. Never attempt to manually

light the main burners on unit with a match, lighter, or any

other flame. If the electric sparking device fails to light the

main burners, refer to the following shutdown procedures,

then call your dealer as soon as possible.

!WARNING

CUT HAZARD

Failure to follow this caution may result in personal injury.

When removing access panels or performing maintenance

functions inside your unit, be aware of sharp sheet metal

parts and screws. Although special care is taken to reduce

sharp edges to a minimum, be extremely careful and wear

appropriate protective clothing, safety glasses and gloves

when handling parts or reaching into the unit.

!CAUTION

3

UNIT INTRODUCTION

This unit is a small packaged gas heat/electric cooling system that

utilizes the comfort of gas heating packaged along with efficient

electric air conditioning. This unit uses Puronr, the ozone

friendly refrigerant for cooling.

Starting or Shutting Off Unit

NOTE: Your combination heating/cooling unit is equipped with

an automatic direct spark ignition and power combustion blower.

To start unit gas heat:

Refer to Fig. 2 for location of unit front access panel. Refer to Fig.

3 for location of gas valve. Refer to Fig. 4 while proceeding with

the following steps.

1. Set the temperature selector on room thermostat to the low-

est temperature setting and set system switch to HEAT.

2. Close the external manual gas shutoff valve.

3. Turn off the electrical supply to the unit.

4. Remove the control access panel with a 5/16--in. nut driver.

(See Fig. 2.)

Compressor

Access Panel

Control

Access

Panel

Blower

Access

Panel

Filter Access Panel

For Accessory FIlter

Rack

A14456

Fig. 2 -- Unit Access Panel

5. Move the selector switch on the internal gas valve to the

OFF position and wait 5 minutes.

6. Move the selector switch on the internal gas valve to the ON

position.

7. Replace the control access panel.

8. Turn on the electrical supply to unit.

9. Open the external manual gas shutoff valve.

10. Set the temperature selector on room thermostat slightly

above room temperature to start unit. The induced--draft

combustion air fan will start. Main gas valve will open and

main burners should ignite within 25 seconds. If the burner

does not light within 25 seconds, the ignition module will

go into a Retry Mode after a period of approximately 20

seconds (following the 7--second ignition period). If the

burners do not light by the 4th ignition try of the initial call

for heat, there is a lockout.

11. Set the temperature selector on room thermostat to desired

setting.

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

1. If the main burners fail to light, or the blower fails to

start, shut down gas heating section and call your dealer for

service.

2. Never attempt to manually light the main burners on unit

with a match, lighter, or any other flame. If the electric

sparking device fails to light the main burners, refer to the

following shutdown procedures, then call your dealer as

soon as possible.

!WARNING

Burners Gas Valve

Flue Hood

A14490

Fig. 3 -- Gas Heating/Electric Cooling Unit with Access Panel

Removed

To shut off unit gas heat:

FIRE, EXPLOSION, ELECTRICAL SHOCK

HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

Do not turn off the electrical power to unit without first

turning off the gas supply.

!WARNING

NOTE: If the unit is being shut down because of a malfunction,

call your dealer as soon as possible.

Should overheating occur or the gas supply fail to shut off, shut

off the external manual gas valve to the unit before shutting off

the electrical supply. Do not use this unit if any part has been under

water. Immediately call a qualified service technician to inspect the

unit and to replace any part of the control system and any gas

control which has been under water.

Refer to Fig. 5 while proceeding with the following steps.

1. Set the temperature selector on room thermostat to lowest

temperature setting and set system SWITCH to OFF.

2. Close the external manual shutoff valve.

3. Turn off the electrical power supply to the unit.

4. Remove the control access panel. (See Fig. 2.)

5. Move the selector switch on the internal gas valve to the

OFF position.

6. Replace the control access panel.

4

To start unit electric cooling:

Refer to Fig. 6 while proceeding with the following steps.

1. Set the temperature selector on room thermostat to highest

temperature setting and set system SWITCH to OFF.

2. Close the external manual shutoff valve, if not already

closed.

3. Turn ON the electrical power supply to the unit.

4. Set system switch to COOL.

5. Set the temperature selector on room thermostat slightly be-

low the room temperature to start unit.

To shut off unit electric cooling:

Refer to Fig. 7 while proceeding with the following steps.

1. Set the temperature selector on room thermostat to highest

temperature setting and set system SWITCH to OFF.

2. Close the external manual shutoff valve, if not already

closed.

3. Turn off the electrical power supply to the unit.

OPERATING YOUR UNIT

The operation of your unit is controlled by the indoor temperature

control (thermostat). You simply adjust the thermostat and it

maintains the indoor temperature at the level you select. Most

thermostats of heating and cooling systems have 3 controls: a

temperature control selector, a FAN control, and a SYSTEM or

MODE control. Refer to your thermostat owner’s manual for more

information.

To better protect your investment and to eliminate unnecessary

service calls, familiarize yourself with the following facts:

Cooling Mode

With the SYSTEM control set to COOL, your unit will run in

cooling mode until the indoor temperature is lowered to the level

you have selected. On extremely hot days, your unit will run for

longer periods at a time and have shorter “off” periods than on

moderate days.

Gas Heat Mode

With the SYSTEM or MODE control of your indoor thermostat set

to HEAT, your unit will run in heating mode until room

temperature is raised to the level you have selected. On cold days

and nights, your system will typically run for longer periods of

time and have shorter “off” periods than on moderate days.

MAINTENANCE AND SERVICE

This section discusses maintenance that should be performed on

your system. Most maintenance should be performed by your

dealer. You, as the owner, may wish to handle some minor

maintenance for your new unit.

Routine Maintenance

All routine maintenance should be handled by skilled, experienced

personnel. Your dealer can help you establish a standard procedure.

For your safety, keep the unit area clear and free of combustible

materials, gasoline, and other flammable liquids and vapors.

To assure proper functioning of the unit, flow of condenser air

must not be obstructed from reaching the unit. Clearance from the

top of the unit is 48 in. (1219 mm). Clearance of at least 36 in.

(914 mm) is required on sides except the power entry side (42 in.

(1067 mm) clearance) and the duct side (12 in. (305 mm)

minimum clearance). Also, ensure that the return--air duct

connection (s) is physically sound, is sealed to the furnace casing,

and terminates outside the space containing the furnace.

Maintenance and Care for the Equipment Owner

Before performing equipment maintenance yourself, please

carefully consider the following:

FIRE, EXPLOSION, ELECTRICAL SHOCK AND

CUT HAZARD

Failure to follow this warning could result in personal

injury, death or property damage.

1. Turn off gas supply first, then all electrical power to your

unit and install lock--out tag before servicing or per-

forming maintenance.

2. When removing access panels or performing

maintenance functions inside your unit, be aware of

sharp sheet metal parts and screws. Although special care

is taken to reduce sharp edges to a minimum, be

extremely careful when handling parts or reaching into

the unit. Wear safety glasses, gloves, and appropriate

protective clothing.

!WARNING

Air Filters

UNIT OPERATION HAZARD

Failure to follow this caution may result in property

damage.

Never operate your unit without filters in place. An

accumulation of dust and lint on internal parts of your unit

can cause loss of efficiency and blower motor and/or

compressor damage.

!CAUTION

The air filter(s) should be checked every 3 or 4 weeks and

changed or cleaned whenever it becomes dirty. Dirty filters

produce excessive stress on the blower motor and can cause the

motor to overheat and shut down.

This unit must have air filters in place before it can be operated.

These filters can be located in one of at least two places. In many

applications, the installer will provide return air filter grilles

mounted on the wall or ceiling of the conditioned structure. In the

instance of filter grilles, the filters can simply be removed from the

grille and replaced.

The other typical application is an accessory filter rack installed

inside the unit itself. The following information is given to assist in

changing filters used in these internal filter racks.

Filter kits are available as a purchased accessory or a factory

installed option. The same filter kit is included with the accessory

economizers and factory installed economizers.

Table 1 – Indoor Air Filter Data

Unit Size Filter Size in. (mm)

24-040/060 2each20x12x1

(508 x 305 x 25 mm)

30-040/060 2each20x12x1

(508 x 305 x 25 mm)

36-060/090 1 each 24 x 14 x 1 (610 x 406 x 25),

24 x 16 x 1 (610 x 406 x 25)

42-060/090 1 each 24 x 14 x 1 (610 x 356 x 25),

24 x 16 x 1 (610 x 406 x 25)

48-090/115/130* 1 each 24 x 16 x 1 (610 x 406 x 25),

24 x 18 x 1 (610 x 457 x 25)

60-090/115/130* 1 each 24 x 16 x 1 (610 x 406 x 25),

24 x 18 x 1 (610 x 457 x 25)

*Units with bent indoor coil.

5

55

STEP 1 STEP 2

C

L

O

S

E

STEP 3

OFF

ON

MAIN

STEP 4

STEP 7

OFF

ON

MAIN

STEP 8

STEP 5

(460 VAC MODELS)

72

STEP 10

STEP 6

(460 VAC MODELS)

STEP 9

O

P

E

N

STEP 5

(208/230 VAC MODELS)

STEP 6

(208/230 VAC MODELS)

A13035

Fig. 4 -- To Start Unit Gas Heat

6

55

STEP 1 STEP 2

C

L

O

S

E

STEP 3

OFF

ON

MAIN

STEP 4

STEP 6

STEP 5

(460 VAC MODELS)

STEP 5

(208/230 VAC MODELS)

A13036

Fig. 5 -- To Shut--off Unit Gas Heat

90

STEP 1 STEP 2

C

L

O

S

E

72

STEP 4 & 5

OFF

ON

MAIN

STEP 3

A09194

Fig. 6 -- To Start Unit Electric Cooling

7

90

STEP 1 STEP 2

C

L

O

S

E

STEP 3

OFF

ON

MAIN

A07797

Fig. 7 -- To Shut--off Unit Electric Cooling

To replace or inspect filters in accessory filter rack (See Fig. 2):

1. Remove the filter access panel using a 5/16--in. nut driver.

2. Remove the filter(s) by pulling it out of the unit. If the

filter(s) is dirty, clean or replace with a new one.

When installing the new filter(s), note the direction of the airflow

arrows on the filter frame which should be pointing at the indoor

coil.

3. Reinstall filter access panel ensuring opening is air and

water tight.

If you have difficulty locating your air filter(s) or have questions

concerning proper filter maintenance, contact your dealer for

instructions. When replacing filters, always use the same size and

type of filter that was supplied originally by the installer. See Table

1 for filter sizes supplied with accessory filter rack.

Fans and Fan Motors

Periodically check the condition of fan wheels and housings and

fan motor shaft bearings. Contact your dealer for the required

annual maintenance.

Heat Exchanger

To ensure dependable and efficient heating operation, the heat

exchanger should be checked by a qualified maintenance person

before each heating season, and cleaned when necessary. This

checkout should not be attempted by anyone not having the

required expertise and equipment to properly do the job. Contact

your dealer for the required periodic maintenance.

Indoor and Outdoor Coils

Cleaning of the coils should only be done by qualified service

personnel. Contact your dealer for the required annual

maintenance.

Condensate Drain

The drain pan and condensate drain line should be checked and

cleaned at the same time the cooling coils are checked by your

dealer.

Compressor

All compressors are factory shipped with a normal charge of the

correct type of refrigeration grade oil. A compressor should rarely

require additional oil.

Condenser (Outdoor) Fan

PERSONAL INJURY AND UNIT DAMAGE

HAZARD

Failure to follow this warning could result in personal

injury, death or property damage.

Do not insert sticks, screwdrivers, or any other objects into

revolving fan blades.

!WARNING

The fan must be kept free of all obstructions to ensure proper

cooling. Contact your dealer for any required service.

Electrical Controls and Wiring

Electrical controls are difficult to check without proper

instrumentation. If there are any discrepancies in the operating

cycle, contact your local dealer and request service.

Refrigerant Circuit

The refrigerant circuit is difficult to check for leaks without the

proper equipment. If inadequate cooling is suspected, contact your

local dealer for service.

EXPLOSION AND ENVIRONMENTAL HAZARD

Failure to follow this warning could result in personal

injury, death or property damage.

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.

!WARNING

Unit Panels

After performing any maintenance or service on the unit, be sure

all panels are fastened securely in place to prevent rain from

entering unit cabinet and to prevent disruption of the correct unit

airflow pattern.

Combustion Area and Vent System

For proper and safe operation, the furnace needs air for combustion

and ventilation. The air openings, on the furnace, the air openings

to the area in which the furnace is installed, and the spacing around

the furnace must not be blocked or obstructed.

The combustion area and vent system should be inspected visually

before each heating season. The normal accumulation of dirt, soot,

rust, and scale can result in loss of efficiency and improper

performance if allowed to build up. This inspection should be done

by a trained service person.

8

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

If your unit makes an especially loud noise when the main

burners are ignited, shut down the heating section and call

your dealer.

!WARNING

BURN HAZARD

Failure to follow this caution may result in personal injury.

Components in heating section may be hot after unit has

been started up. When observing flame, be careful not to get

close to or touch heating components.

!CAUTION

Regular Dealer Maintenance

In addition to the type of routine maintenance you might be willing

to perform, your unit should be inspected regularly by a properly

trained service technician. An inspection (preferably each year, but

at least every other year) should include the following:

1. Inspection of all flue product passages--including the burn-

ers, heat exchanger, and flue collector box, Mare sure the

burner flames are blue in color and in proper adjustment.

Refer to Fig. 8 for burner flame.

MANIFOLD

BURNER

BURNER FLAME

C99021

Fig. 8 -- Monoport Burner

2. Inspection of all combustion--and ventilation--air passages

and openings.

3. Close inspection of all gas pipes leading to and inside of

your unit.

4. Inspection and, if required, cleaning of the outdoor and

indoor coils.

5. Inspection and, if required, cleaning of the indoor coil con-

densate drain pan.

6. Inspection and cleaning of blower wheel housing and

motor.

7. Inspection of all supply--air and return--air ducts for leaks,

obstructions, and insulation integrity. Any problems found

should be resolved at this time.

8. Inspection of the unit base to ensure that no cracks, gaps,

etc., exist which may cause a hazardous condition.

9. Inspection of the unit casing for signs of deterioration.

10. Inspection of all electrical wiring and components to assure

proper connection.

11. Inspection for leaks in the refrigerant circuit. Pressure

check to determine appropriate refrigerant charge.

12. Operational check of the unit to determine working

conditions. Repair or adjustment should be made at this

time.

Your servicing dealer may offer an economical service contract that

covers seasonal inspections. Ask for further details.

Complete service instructions can be found in the unit Installation,

Start--up and Service Instructions.

Warranty Certificate

Your unit has a limited warranty. Be sure to read the warranty

carefully to determine the coverage for your unit.

Before you call for service...

...check for several easily--solved problems.

If insufficient heating or cooling is suspected:

( ) Check for sufficient airflow. Check the air filter for dirt. Check

for blocked return--air or supply--air grilles. Be sure they are open

and unobstructed. If these checks do not reveal the cause, call your

servicing dealer.

If your unit is not operating at all, check the following list for

easy solutions:

( ) Check to be sure that your thermostat temperature selector is

set below the indoor temperature during the cooling season or

above the indoor temperature during heating season. Be sure the

SYSTEM switch or MODE control is in the COOL or HEAT

position and not in the OFF position.

( ) If your unit still fails to operate, call your servicing dealer for

troubleshooting and repairs. Specify the model and serial numbers

of your unit. (Record them in this manual in the space provided.) If

the dealer knows exactly which unit you have, he may be able to

offer suggestions over the phone, or save valuable time through

knowledgeable preparation for the service call.

In Case of Trouble

If you perform the steps above and unit performance is still

unsatisfactory, shut off the unit and call your dealer.

Copyright 2014 Carrier Corp. S7310 W. Morris St. SIndianapolis, IN 46231 Edition Date: 10/14

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

Catalog No: OM48VG---02

Replaces: OM48VG---01