General; Electrostatic Discharge (Esd) Precautions - Carrier 58HDX Service Manual

WARNING
!
FIRE / EXPLOSION HAZARD
Failure to follow this warning could cause personal injury,
death, or property damage.
Never store anything on, near, or in contact with the furnace,
such as:
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum
cleaners, or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning
compounds, plastic or plastic containers, gasoline, kerosene,
cigarette lighter fluid, dry cleaning fluids, or other
volatile fluids.
3. Paint thinners and other painting compounds, paper bags, or
other paper products.
Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified
service agency personnel should install, repair, or service
heating equipment. Untrained personnel can perform basic
maintenance functions described in User's Information
Manual such as cleaning and replacing air filters. All other
operations must be performed by trained and qualified service
agency personnel. When working on heating equipment, observe
precautions in the literature, on tags, and on labels attached to or
shipped with the unit and other safety precautions that may apply.
Follow all safety codes including the National Fuel Gas Code
(NFGC) NFPA 54- -2006/ANSI Z223.1- -2006 in the USA;
National Standard of Canada, Natural Gas and Propane Installation
Code CSA B149.1 (NSCNGPIC) in Canada; and the Installation
Standards, Warm Air Heating and Air Conditioning Systems
(NFPA 90B) ANSI/NFPA 90B. Wear safety glasses and work
gloves. Have a fire extinguisher available during start-up and
adjustment procedures and service calls.
CAUTION
!
ELECTRICAL SHOCK
HAZARD
Failure to follow this caution may result in personal injury or
damage to furnace.
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.

GENERAL

This furnace van be installed as a
non-direct vent (1-pipe)
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. 1, you may need to
revise your orientation to component location accordingly.
AND UNIT DAMAGE
direct vent (2-pipe) or
condensing gas furnace. These
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may damage furnace
components.
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
electrostatic potential.
AIRFLOW
UPFLOW
HORIZONTAL
LEFT
DOWNFLOW
AIRFLOW
Fig. 1 - - Multipoise Orientations
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
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
(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.
2
HORIZONTAL
RIGHT
AIRFLOW
A93041
AIRFLOW
for installed and uninstalled