Carrier 48XT-A manual Safety Considerations

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

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 per- sonal 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 sugges- tions which will result in enhanced installation, reliability, or op- eration.

!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.

!CAUTION

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 when handling parts or reaching into the unit.

!WARNING

FIRE AND EXPLOSION HAZARD

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.

!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.

UNIT INTRODUCTION

This 48XT-A unit is a small packaged HYBRID HEAT® 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.

You may notice your two-stage packaged HYBRID HEAT® system runs for longer periods of time. Nearly 80% of the time it’s running, it is operating in low-stage, and your indoor temperature will remain more consistent with fewer drafts, better humidity control, enhanced comfort and enhanced energy efficiency.

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.

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

1.Set the temperature selector on UI to the lowest temperature setting and set system switch to Emergency Heat.

2.Close the external manual gas shutoff valve.

2