Sears N9MP2, N9MP1, 9MPD Tochecktemperaturerise,usethefollowingprocedure, Changing Blower Speed

Tochecktemperaturerise,usethefollowingprocedure:

1.Placethermometersinsupplyandreturnairregistersas closetofurnaceaspossible,avoidingdirectradiantheat fromheatexchangers.

2.Operatefurnacecontinuouslyfor15minuteswithallregis- tersandductdampersopen.

3.Takereadingandcomparewithrangespecifiedonrating plate.

4.IfthecorrectamountoftemperatureriseisNOTobtained,it maybenecessarytochangeblowerspeedAhigherblow.- erspeedwilllowerthetemperaturerise.A lowerblower speedwillincreasethetemperaturerise.

Changing Blower Speed

Change the heat or cool blower motor speed by removing the motor lead from the "Heat" or "Cool" terminal and re-

place it with the desired motor speed lead from the "Un- used Motor Lead" location. Connect the wire previously removed from the "Heat" or "Cool" terminal to the vacated

"Unused Motor Lead" terminal.

If the same speed must be used for both heating and cool-

ing, remove the undesired motor speed lead from the "Heat" or"Cool" terminal and connect that lead to the open

terminal at "Unused Motor Lead" location. Attach a jump- er between the "Heat" and "Cool" terminals and the re-

maining motor speed lead.

Note: For motors with (4) speed leads, it will be necessary to tape off the terminal of the motor speed lead removed from the "Heat" or "Cool" terminal with electrical tape since

an open terminal will not be available at the "Unused Mo- tor Lead" location.

ELECTRICAL SHOCK HAZARD

Failure to do so can result in death and/or personal injury.

Turn OFF power to furnace before changing speed taps.

NOTE: The speed taps that the manufacturer sets from the facto- ry for this product are based on a nominal 400 CFM per ton cool-

ing and the basic mid range on the temperature rise for heating.

Since the manufacturer cannot establish the static pressure that

will be applied to the unit, it is the responsibility of the installer

dealer/contractor to select the proper speed taps for the applica- tion when the unit is installed.

If it is necessary to change speeds, refer to steps below.

1.Refer to Furnace WiringDiagramfor location of the heating and cooling speed taps located on the electronic fan control as well as location of unused blower motor speed leads. Use the chart (Table 9) to determine the blower motor speed settings.

_iiiii:!	Blower	Speed Chart
i;iiii ii ii ii ii ii ii ii ii ii ii ii ii ii ii ii ii ii
Wire Color		Motor Speed
Black		High
Orange*		Med-High
Blue		Medium
Red		Low

* Med-High speed may not be provided on all models.

Continuous Fan Operation

A terminal is provided on the electronic fan control located in the

circulating blower compartment for operation of the continuous

fan option. This connection is intended for the low speed motor tap, and has a lower contact rating (8 amps) than the heat and cool taps. When the low speed blower lead is connected to this terminal, this will provide low speed blower operation whenever the other two speeds (Heat or Cool) are not energized.

Thoroughly check the system after modification to ensure the

proper operation of the circulating air blower in all modes of opera- tion.

Separate speed selections for Heat, Cool, and

Continuous Fan

Connect low speed lead from circulating motor to the "Cont." ter-

minal at the electronic fan control. The appropriate motor leads should already be connected to the "Heat" and "Cool" terminals.

Heating and Continuous BlowerSpeed the Same

If it is necessary to operate the heating speed and continuous blower speed using the same blower speed, connect ajumper be- tween the "Heat" and "Cont." terminals on the electronic fan con- trol.

Note: There should be only ONE motor lead going to the "Heat" and "Cont." terminals.

9.Furnace Maintenance

CAUTION See "User "s Information Manual" and the "Service Manual".

It is recommended that the furnace be inspected and serviced on an annual basis (before the heating season) by a

qualified service technician.

44001 111400 [_