Carrier 58MVC Combustion Area And Vent System, Heading South For The Winter? Dont Forget Your

COMBUSTION AREA AND VENT

SYSTEM

Visually inspect the combustion area and vent system before each heating season. Make sure that all PVC pipes leading into the

combustion area and vent are free from any cracks and sags.

CARBON

MONOXIDE

POISONING

HAZARD

Failure to follow this warning could result in personal

iniury

or

death.

If

holes

are found

in

the

pipes

or

if

any portion

has

A00223

become

disconnected,

toxic

fumes

can

escape

into

your

Fig. 33 - Remove Burner Enclosure Front

home.

DO

NOT

OPERATE

YOUR

FURNACE.

Call

your

dealer

for service.

Check

the

combustion-air

intake and

vent

pipe

on the outside

of

your

home

for blockage.

When dirt, soot, scale, or rust is allowed to build up, your furnace

can

suffer

a loss

of efficiency

and

perform

improperly.

Accunmlations

on

the

main

burners

can

result

in firing out

of

normal sequence. This delayed ignition creates an alarmingly

loud

sound.

UNIT OPERATION HAZARD

Failure to follow this caution may result in property damage.

If your furnace makes an especially loud noise when the

main burners light, shut down your furnace and call your dealer.

To inspect the combustion area and vent system, you will need a flashlight. Refer to Fig. 3 and proceed as follows:

CARBON MONOXIDE POISONING HAZARD

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

If dirt, rust, soot, or scale accumulations are found, call your dealer. Do not operate your furnace.

1.Turn off the gas and electrical supplies to the furnace and remove the main furnace door. (See Fig. 8, 9, and 10.)

2.Remove burner enclosure front. (See Fig. 33.)

Inspect the gas burners, igniter area, and remainder of furnace for dirt, rust, soot, or scale.

3.Inspect the combustion-air and vent PVC pipes for sags,

holes, cracks, water leaks, blockage or disconnections.

Horizontal portions of pipes must slope downward toward furnace.

4.Reinstall burner enclosure front.

5.If your furnace is free of the above conditions, replace main furnace door and turn on electrical and gas supplies to the furnace. (See Fig. 13, 14, and 15.)

6.Start the furnace and observe its operation. Watch the burner

flames to see if they are clear blue, almost transparent. (See

Fig. 34.) If you observe a suspected malfunction, or the burner flames are not clear blue, call your dealer.

A92330

Fig. 34 - Burner Flame

HEADING SOUTH FOR THE

WINTER? DON'T FORGET YOUR

FURNACE!

[)NIT AND PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damage to the furnace and other property damage.

If the furnace is installed in an unconditioned space where the ambient temperatures may be 32°F (0°C) or lower, freeze protection measures must be taken to prevent minor property or product damage.

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the furnace and other property damage.

Do not use ethylene glycol (Prestone II antifreeze coolant or equivalent). Failure of plastic components may occur.

Since the furnace uses a condensing heat exchanger, some water

will accunmlate in the unit as a result of the heat transfer process.

Therefore, once it has been operated, it cannot be turned off and

left off for an extended period of time when temperatures will

reach 32°F (0°C) or lower unless winterized. Follow these

procedures to winterize your furnace:

1. Obtain propylene glycol (RV/swimming pool antifreeze or equivalent).

2. Turn off electrical supply to the furnace. (See Fig. 170

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