Operating instructions

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.).
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
Fig. 1—Dimensional Drawing
A99109
4
3
⁄
16
″
2″
2
15
⁄
16
″
13
⁄
16
″
11
⁄
16
″
9
1
⁄
8
″
10
1
⁄
4
″
1
1
⁄
16
″
2
1
⁄
8
″
8
1
⁄
4
″
10
1
⁄
4
″
1
1
⁄
16
″
2
1
⁄
8
″
16
1
⁄
16
″
13
5
⁄
16
″
19″
11
⁄
16
″
13
⁄
16
″
11
⁄
16
″
20″
28
1
⁄
2
″
39
7
⁄
8
″
D
5
⁄
8
″ TYP
1
″ TYP
E
A
AIRFLOW
OUTLET
INLET
1
⁄
2
″ DIA
THERMOSTAT
WIRE ENTRY
7
⁄
8
″ DIA
ACCESSORY
7
⁄
8
″ DIA
ACCESSORY
DIMPLES TO DRILL HOLES
FOR HANGER BOLTS (4 PLACES)
IN HORIZONTAL POSITION
ADDITIONAL
7
⁄
8
″ DIA K.O. ARE
LOCATED IN THE TOP PLATE
AND BOTTOM PLATE
NOTE:
7
⁄
8
″ DIA HOLE
POWER ENTRY
1
1
⁄
2
″ DIA
R.H. GAS ENTRY
7
⁄
8
″ DIA
ACCESSORY
1
3
⁄
4
″ DIA HOLE
GAS ENTRY
VENT CONNECTION
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, must use entire return air opening.
NOTES:
TABLE 1—DIMENSIONS (IN.)
UNIT SIZE A D E VENT CONN SHIP. WT
024065 14-3/16 12-9/16 12-11/16 4 141
036065 14-3/16 12-9/16 12-11/16 4 145
036085 17-1/2 15-7/8 16 4 154
048085 17-1/2 15-7/8 16 4 154
048105 17-1/2 15-7/8 16 4 171
060105 21 19-3/8 19-1/2 4 181
060125 24-1/2 22-7/8 23 5 192
—2—