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ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

PROCEDURE

Electrostatic discharge can affect electronic components.
Take precautions during furnace installation and servicing to
protect the furnace electronic control. Precautions will pre-
vent 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
electrostatic potential.

1. Disconnect all power to the furnace. DO NOT TOUCH THE

CONTROL OR ANY WIRE CONNECTED TO THE CON-
TROL PRIOR TO DISCHARGING YOUR BODY’S ELEC-
TROSTATIC 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 ungrounded
objects, etc.).

4. If you touch ungrounded objects (recharge your body with

static electricity), firmly touch furnace again before touching
control or wires.

5. Use this procedure for installed and uninstalled (ungrounded)

furnaces.

6. Before removing a new control from its container, discharge

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.

INTRODUCTION

The model 58TUA Series 110 or 120 Furnace is available in sizes
40,000 through 133,000 Btuh input capacities.

The design of the upflow gas-fired furnace is A.G.A./C.G.A.
design-certified for use with natural and propane gases and for
installation on combustible wood flooring, in alcoves, attics,
basements, closets, or utility rooms. The design of this furnace line
is not A.G.A./C.G.A. design-certified for installation in mobile
homes, recreation vehicles, or outdoors.

Before installing the furnace, refer to the current edition of the
NFGC and the NFPA 90B. Canadian installations must be installed
in accordance NSCNGPIC and all authorities having jurisdiction.
For a copy of the NFGC NFPA54/Z223.1, contact International
Approval Services U.S. Inc., 8501 E. Pleasant Valley Road,
Cleveland, OH 44131 or National Fire Protection Association Inc.,
Batterymarch Park, Quincy, MA 02269. For a copy of NFPA 90B,
contact National Fire Protection Association Inc., Batterymarch
Park, Quincy, MA 02269.

Before installing the furnace in Canada, refer to the current edition
of the NSCNGPIC. Contact Standards Department of Canadian
Gas Association, 55 Scarsdale Road, Don Mills, Ontario, Canada
M3B 2R3.

Application of this furnace should be indoors with special
attention given to vent sizing and material, gas input rate, air
temperature rise, and unit sizing. Improper installation or
misapplication of the furnace can require excessive servicing
or cause premature component failure.

To aid in installation, troubleshooting, and service, a status code
label is located on the blower compartment door. This label
explains how to use the LED status indicator on the furnace control
which is viewed through the sight glass on the door.

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Fig. 2—Clearances to Combustibles

A98122

320325-101 REV. H

MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION

This forced air furn

ace is equipped for use with

atural gas at altitudes 0 - 10,000 ft (0-3,050m).

An accessory kit, supplied by the m

anufacturer,

hall be used to convert to propane gas use or

may be required for some natural gas applications.