Electrostatic Discharge (Esd) Precautions; Introduction - Carrier 58MSA Installation, Start-Up, And Operating Instructions Manual

BLOWER SHELF
CONDENSATE
TRAP (INSIDE)
ALTERNATE DRAIN
TUBE LOCATION
CONDENSATE TRAP
DRAIN TUBE LOCATION
UPFLOW APPLICATIONS
Step 7—Electrical Connections
• US: National Electrical Code (NEC) ANSI/NFPA 70-2002
• CANADA: Canadian Electrical Code CSA C22.1

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

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. Multiple disconnects may
be required. DO NOT TOUCH THE CONTROL OR ANY
WIRE CONNECTED TO THE CONTROL PRIOR TO DIS-
CHARGING 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
FURNACE
CONDENSATE
DOOR
TRAP
1 4
FIELD 26
DRAIN
CONN
SIDE VIEW
DOWNFLOW AND ALTERNATE
EXTERNAL UPFLOW APPLICATIONS
SLOT FOR SCREW
HORIZONTAL
APPLICATION
(OPTIONAL)
1 2
1
3 4
1 8
7
3 4
1
7 8
WIRE TIE
GUIDES
(WHEN USED)
FRONT VIEW SIDE VIEW
Fig. 5—Condensate Trap
5
FURNACE
SIDE
7 8
4
1 2
FIELD
1
DRAIN
CONN
FRONT VIEW
1
⁄ OD
4
COLLECTOR BOX TO
TRAP RELIEF PORT
1
⁄ OD
2
INDUCER HOUSING
DRAIN CONNECTION
5
⁄ OD
8
COLLECTOR BOX
DRAIN CONNECTION
SCREW HOLE FOR
UPFLOW OR DOWN-
FLOW APPLICATIONS
(OPTIONAL)
1 4
1
2 ⁄ -IN. PVC OR CPVC
2
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 the unpainted metal surface of
the 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 58MSA 4-way multipoise, Gas-Fired, Category IV,
condensing furnaces are available in model sizes ranging in gas
input rates of 40,000 to 120,000 Btuh.
FURNACE
DOOR
FURNACE
SIDE
4
3 4
5
4
1 4
26
3 4
END VIEW FRONT VIEW
HORIZONTAL
APPLICATIONS
3 4
5
A93026