ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE
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.).
TABLE 1—DIMENSIONS (IN.)
UNIT SIZE A D E VENT CONN SHIP. WT (LB)
024045 14-3/16 12-9/16 12-11/16 4 118
036045 14-3/16 12-9/16 12-11/16 4 120
024070 14-3/16 12-9/16 12-11/16 4 142
036070 14-3/16 12-9/16 12-11/16 4 127
042091 17-1/2 15-7/8 16 4 124
048091 21 19-3/8 19-1/2 4 155
036110 17-1/2 15-7/8 16 4 153
048111 21 19-3/8 19-1/2 4 173
060111 24-1/2 22-7/8 23 4 176
048135 21 19-3/8 19-1/2 5* 173
060135 24-1/2 22-7/8 23 5* 187
060155 24-1/2 22-7/8 23 5* 194
* Oval collar
→Fig. 1—Dimensional Drawing
A00210
A
D
13
⁄16″
E
11
⁄16″
11
⁄16″
28
1
⁄2″
39
7
⁄8″
24
5
⁄16″
11
⁄16″
3″
2
1
⁄16″
1″
12
5
⁄16″
5
3
⁄8″
5
13
⁄16″
2
3
⁄8″
AIR INLET
7
⁄8-IN. DIA HOLE
POWER ENTRY
7
⁄8-IN. DIA
ACCESSORY
1
3
⁄4-IN. DIA HOLE
GAS ENTRY
1
⁄2-IN. DIA HOLE
THERMOSTAT
WIRE ENTRY
SIDE INLET
VENT CONN
1. Two additional
7
⁄8-in. dia holes are located in the top plate.
2. Minimum return-air openings at furnace, based on metal duct. If flex duct is used,
see flex duct manufacturer's recommendations for equivalent diameters.
a. For 800 CFM–16-in. round or 14
1
⁄2 x 12-in. rectangle.
b. For 1200 CFM–20-in. round or 14
1
⁄2 x 19
1
⁄2-in. rectangle.
c. For 1600 CFM–22-in. round or 14
1
⁄2 x 23
1
⁄4-in. rectangle.
d. For airflow requirements above 1800 CFM, see Air Delivery table in Product Data literature for specific
use of single side inlets. The use of both side inlets, a combination of 1 side and the bottom, or the
bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM.
NOTES:
5
3
⁄8″
5
13
⁄16″
2
3
⁄8″
2
11
⁄16″
1″
2
1
⁄16″
19″
13
⁄16″
7
⁄8-IN. DIA
POWER ENTRY
AIRFLOW
OUTLET
1
1
⁄2-IN. DIA
R.H. GAS ENTRY
7
⁄8-IN. DIA ACCESSORY
1
⁄2-IN. DIA THERMOSTAT
WIRE ENTRY
SIDE INLET
14
1
⁄2″
1″
23
1
⁄4″
SIDE RETURN
DUCT LOCATION
1
1
⁄4″
TYP 1″
5
⁄8″
TYP
—2—
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