Carrier 48ES User Manual

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48ES Single---Packa ged Gas Heat/Electric Cooling

with Puron

(R---410A) Refrigerant

Owner’s Information Ma nual

Fig. 1 -- Unit 48ES

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 and model #)

_____________________________________________

NOTE TO INSTALLER:

This manual must be left with the equipment owner.

INSTALLATION INFORMATION

Date Installed ________________________________

DEALERSHIP CONTACT INFORMATION

Company Name_______________________________

Address______________________________________

_____________________________________________

Phone Number _______________________________

Technician Name _____________________________

_____________________________________________

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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 basicmaintenance 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.

UNIT INTRODUCTION

This 48ES unit is a small packaged gas heat/electric cooling system that can utilize the comfort of gas heating packaged along with efficient electric air conditioning. This unit uses PuronE, the ozone friendly refrigerant for cooling.

Starting or Shutting Off Unit

To start the unit:

1. Turn on the electrical power supply and gas to unit.

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 Whenyou see this symbolon the unitand in instructionsor 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 resultin minor personal injury or product and propertydamage. NOTE isusedtohighlight suggestionswhich

will result in enhanced installation, reliability, or operation.

Note: Installer: This manual should be left with the equipment user.

CAUTION

FORYOURSAFETY

Failure to follow this caution may result in personal injury.

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

2. Select desired temperature on thermostrat and set SYSTEM switch or MODE control to desired mode.

To shut off unit:

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

your dealer as soon as possible.

1. Set system SWITCH or MODE control to OFF.

2. Turnoff the electrical power, install lock--out tag and shut off gas supply to unit.

OPERATING YOUR UNIT

The operation of your unit is controlled by the indoor temperature control. You simply adjust the thermostat and it maintains the indoor temperatureat thelevelyou select.Mostthermostatsof heating and cooling systems have 3 controls: a temperaturecontrolselector, a FAN control, and a SYSTEM or MODE control. Refer to your thermostat owner’s manual for more information.

To better protectyour investment and to eliminate unnecessary service calls, familiarize yourself with the following facts:

Step 1—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.

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.

ELECTRICAL SHOCK HAZARD

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

When removing access panels or performing maintenance functions inside your unit, be awareof 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.

WARNING

Step 2—Gas Heat Mode

With the SYSTEM or MODE control of your idoor thermostat set to HEAT, your unit willrun in heating mode untilroom temperature is raised to the level you have selected. Of couse, your system will run for longer periods to maintain a comfortable environment on cooler days and nights than on moderate ones.

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. Yourdealer can help you establish a standard procedure.

For your safety,keepthe unit area clearand freeof combustiblematerials, gasoline, and other flammable liquids and vapors.

To assure properfunctioning of the unit, flow of condenserairmust 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. clearance) (1067mm)and the duct side(12 in. minimum clearance)(305mm).

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Maintenance and Care for the Equipment Owner

Before proceeding with those things you might want to maintain yourself, please carefully consider the following:

FIRE,EXPLOSION,ELECTRICAL SHOCK HAZARD

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

1. TURN OFF ELECTRICAL POWER TO YOUR UNIT BEFORE SERVICING OR PERFORMING 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.

Air Filters

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 blowermotor and can causethe 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. Inthe instanceof 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.

Table 1 indicates the correct indoor filter size for your unit. Refer to Fig. 2 to access filters installed in the accessory filter rack. If using an Accessory Filter Rack, refer to the Installation Instructions provided with it for correct filter sizes and quantities.

Unit Size Filter Size

48ES018---030 20x24x1 (508x610x25 mm)

48ES036 24x30x1 (610x762x25 mm)

48ES042---060 24x36x1 (610x914x25 mm)

WARNING

Table 1—Indoor Air Filter Data

FILTER ACCESS PANEL*

*For accessory filter rack.

Fig. 2 -- Accessory Filter Rack Access Panel

(Optional Louvered Panels Shown)

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

When installing the new filter(s), note thedirection of the airflow arrows on the filter frame.

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.

FIRE AND UNIT OPERATION HAZARD

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

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.

Indoor and Outdoor Cleaning of the coils should only be done by qualified service per-

sonnel. Contact your dealer for the required annual maintenance. Condensate 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 Allcompressorsarefactoryshippedwith anormalcharge of thecor-

rect type of refrigeration grade oil. A compressor should rarely require additional oil.

Condenser (Outdoor)

WARNING

Coils

Drain

Fan

ACCESS PANEL

C99094

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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.

The fan must be kept free of all obstructions to ensure proper cooling. Contact your dealer for any required service.

Electrical Controls and W

Electricalcontrolsare difficult to check withoutproper instrumentation. If there are any discrepancies in the operating cycle, contact your local dealer and request service.

Refrigerant

Therefrigerantcircuitis difficulttocheckfor leakswithout the proper equipment.If inadequate coolingis suspected, contact your local dealer for service.

Circuit

EXPLOSION AND BURN 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.

Unit Panels

Afterperforming any maintenance or service on the unit, be sureall panels are fastened securely in place to prevent rain from entering unit cabinet and to preventdisruption of the correct unit airflow pattern.

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 and, if required, cleaning of the outdoor and indoor coils.

2. Inspection and, if required, cleaning of the indoor coildrain pan.

WARNING

iring

WARNING

3. Inspection and cleaningof blower wheel housing andmotor.

4. Inspection of all supply--air and return--air ducts for leaks, obstructions, and insulation integrity. Any problems found should be resolved at this time.

5. Inspectionof the unit baseto ensurethat no cracks, gaps, etc., exist which may cause a hazardous condition.

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

7. Inspection of all electrical wiring and components to assure proper connection.

8. Inspection for leaks in the refrigerant circuit. Pressure check to determine appropriate refrigerant charge.

9. Operational check of the unit to determine working conditions.Repairor adjustmentshould be made at thistime.

Your servicing dealer may offeran economicalservice contractthat covers seasonal inspections. Ask for further details.

Completeservice 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 and not OFF.

( ) If your unit still fails to operate, call your servicing dealer for troubleshooting and repairs. Specify the model and serial numbers of your unit. (Recordthem 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 Tr ouble

If you performthe steps above and unit performance is still unsatisfactory, shut off the unit and call your dealer.

HEATING & COOLING

TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or classified section of your local telephone directory under the

“Heating Equipment” or “Air Conditioning Contractors & Systems” heading for dealer listing by brand name.

Have available the Model No., Series Letter, & Serial No. of your equipment to ensure correct replacement part.

Manufacturer reserves the right to change, at any time, specifications and design without notice and without obligation.

Catalog No: OM48--- 27

Replaces: NEW