Carrier 48VT-B Owner's Manual

48EZ---A and 48VT --- B Comfort ™ 13 and 14 SEER Single Packaged HYBRID HEATr Dual Fuel 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

A09034

Without Economizer

Fig. 1 -- Unit 48EZ--A and 48VT--B

With Economizer

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 _____________________________

_____________________________________________

A10077

This manual must be left with the equipment owner.

NOTE TO INSTALLER:

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. 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. 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.

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 clothing, safety glasses and gloves when handling parts or reaching into the unit.

FIRE AND EXPLOSION HAZARD

Failure to follow this hazard 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.

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.

CAUTION

WARNING

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, 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, EXPLOSION, ELECTRICAL SHOCK HAZARD

Failure to follow this hazard 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.

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

UNIT INTRODUCTION

This unit is a small packaged gas heat/electric heat pump system that can utilize both the efficiency of heat pump heating and the comfort of gas heating. The system will optimize for ideal heating, depending on several factors. This unit uses Puron, the ozone friendly refrigerant, for cooling and heat pump heating.

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. 4 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 lowest temperature setting and set system switch to Emergency 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.)

seconds (following the 5 --second ignition period). If the burners do not light within 15 minutes of the initial call for heat, there is a lockout.

11. Set the temperature selector on room thermostat to desired setting.

WARNING

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.

Blower

Filter Access Panel For Accessory Filter Rack

Fig. 2 -- Unit Access Panels

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 5 seconds. If the burner does not light within 5 seconds, the ignition module will go into a Retry Mode after a period of approximately 22

Compressor Access Panel

Access Panel

Control Access Panel

A09213

Flue Hood

Burners

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

Gas Valve

A09043

Removed

To shut off unit gas heat:

WARNING

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.

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.

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