| 28 1⁄2† | VENT CONNECTION |
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| 1⁄2† DIA |
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| 20† |
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13⁄16† | 13⁄16† |
| 4 | 3⁄ | 16 | † |
| THERMOSTAT |
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INLET |
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| 7⁄8† DIA |
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| 2 15⁄16† |
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| 7⁄8† DIA HOLE |
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39 7⁄8† |
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| 1 1⁄2† DIA |
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| 7⁄8† DIA | 9 1⁄8† |
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| R.H. GAS ENTRY |
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| ACCESSORY |
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| 1 3⁄4† DIA HOLE | 10 1⁄4† |
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| 16 1⁄16† |
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| 7⁄8† DIA | 1† TYP | ||||
| GAS ENTRY |
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11⁄16† | OUTLET | 1 1⁄16† |
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| 13 5 ⁄16† |
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| 5⁄8† TYP | |||
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| 2 1⁄8† |
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| 10 | 1 | ⁄4† |
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| 19† | 8 1⁄4† |
| 11⁄ | 16† |
| 1 | ⁄16† |
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| 2 1⁄8† |
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NOTE: ADDITIONAL 7⁄8† DIA K.O.’s ARE | AIRFLOW DIMPLES TO DRILL HOLES |
LOCATED IN THE TOP PLATE | FOR HANGER BOLTS (4 PLACES) |
AND BOTTOM PLATE | IN HORIZONTAL POSITION |
NOTE: Minimum
see flex duct manufacturer's recommendations for equivalent diameters.
a.For 800
b.For 1200
c.For 1600
d.For airflow requirements above 1800 CFM, must use entire return air opening.
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| A99288 |
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| →Fig. 1ÐDimensional Drawing |
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| Table 1ÐDimensions (In.) |
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UNIT SIZE | A | D | E |
| VENT CONN | SHIP. WT (LB) |
| 4 | 124 | ||||
| 4 | 128 | ||||
| 4 | 129 | ||||
| 4 | 137 | ||||
16 |
| 4 | 146 | |||
16 |
| 4 | 151 | |||
16 |
| 4 | 159 | |||
21 |
| 4 | 174 | |||
21 |
| 4 | 176 | |||
23 |
| 5 | 193 | |||
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.
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