General, Electrostatic Discharge ESD Precautions

CSA B149.1-00 (NSCNGPIC) in Canada; and the Installation Standards, Warm Air Heating and Air Conditioning Systems (NFPA 90B) ANSI/NFPA 90B. In Canada, refer to the CAN/CGA-B/49.1- and .2-M95 National Standard of Canada, Natural Gas and Propane Installation Codes (NSCNGPIC). Wear safety glasses and work gloves. Have a fire extinguisher available during start-up and adjustment procedures and service calls.

GENERAL

These instructions are written as if the furnace is installed in an upflow application. An upflow furnace application is where the blower is located below the combustion and controls section of the furnace, and conditioned air is discharged upward. Since this furnace can be installed in any of the 4 positions shown in Fig. 2, you may need to revise your orientation to component location accordingly.

				• VARIABLE	CAPACITY		SYSTEM
	GAS FURNACE			• VARIABLE
HIGH EFFICIENCY
		E N T	H E A T I N G			M A C H I N E
T H E	I N T E L L I G	E N T	H E A T I N G
T H E	I N T E L L I G

A98308

Fig. 1—Multipoise Furnace in Upflow Orientation

EFFICIENCY

RATING

CERTIFIED

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

CAUTION: Electrostatic discharge can affect electronic components. Take precautions during furnace installation and servicing to protect the furnace electronic control. Precautions will prevent electrostatic discharges from personnel and hand tools which are held during the procedure. These precautions will help to avoid exposing the control to electrostatic discharge by putting the furnace, the control, and the person at the same electro- static potential.

1.Disconnect all power to the furnace. DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY’S ELECTROSTATIC CHARGE TO GROUND.

2.Firmly touch a clean, unpainted, metal surface of the furnace chassis which is close to the control. Tools held in a person’s hand during grounding will be satisfactorily discharged.

3.After touching the chassis you may proceed to service the control or connecting wires as long as you do nothing that recharges your body with static electricity (for example; DO NOT move or shuffle your feet, DO NOT touch un- grounded objects, etc.).

4.If you touch ungrounded objects (recharge your body with static electricity), firmly touch furnace again before touch- ing control or wires.

5.Use this procedure for installed and uninstalled (un- grounded) furnaces.

6.Before removing a new control from its container, dis- charge your body’s electrostatic charge to ground to protect the control from damage. If the control is to be installed in a furnace, follow items 1 through 5 before bringing the control or yourself into contact with the furnace. Put all used AND new controls into containers before touching ungrounded objects.

7.An ESD service kit (available from commercial sources) may also be used to prevent ESD damage.

CARE AND MAINTENANCE

For continuing high performance and to minimize possible furnace failure, it is essential that maintenance be performed annually. Consult your local dealer about proper maintenance and mainte- nance contract availability.

AIRFLOW

UPFLOW

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G				®				M
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CERTIFIED

HORIZONTAL

LEFT

DOWNFLOW

AIRFLOW

HORIZONTAL

RIGHT

AIRFLOW

REGISTERED QUALITY SYSTEM

AIRFLOW

A93041

Fig. 2—Multipoise Orientation

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