Carrier 48VT-A manual Unit Introduction, Starting or Shutting Off Unit, Fire and Explosion Hazard

!WARNING

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.

!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.

!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.

UNIT INTRODUCTION

The 48EZ-A and 48VT-A units are small packaged gas heat/electric heat pump systems 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. 3 for location of unit front access panel. Refer to Fig.

4for location of gas valve. Refer to Fig. 5 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 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. 3.)

	Blower	Control
Filter Access Panel	Access	Access
	Panel	Panel
For Accessory Filter Rack
	Compressor
	Access
	Panel

A09213

Fig. 3 - 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 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.

3