Circulator Blower Speeds - Maytag Amana MES9 Series Installation Instructions Manual

Circulator Blower Speeds

This furnace is equipped with a multi-speed circulator blow-
er. This blower provides ease in adjusting blower speeds.
The Specification Sheet applicable to your model provides an
airflow table, showing the relationship between airflow (CFM)
and external static pressure (E.S.P.), for the proper selection
of heating and cooling speeds.
T
O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK
OFF
TURN POWER TO THE FURNACE BEFORE CHANGING SPEED TAPS
1. Determine the tonnage of the cooling system installed with
the furnace. If the cooling capacity is in BTU/hr divide it
by 12,000 to convert capacity to tons.
Example: Cooling Capacity of 30,000 BTU/hr.
30,000/12,000 = 2.5 Tons
2. Determine the proper air flow for the cooling system. Most
cooling systems are designed to work with air volume
between 350 and 450 CFM per ton. Most manufacturers
recommend an air flow of about 400 CFM per ton.
Example: 2.5 tons X 400 CFM per ton = 1000 CFM
3. Select the heating speed for your model from the
heating speed chart in the Specification Sheet. The
selected speed must provide a temperature rise within
the rise range listed with the particular model.
To adjust the circulator blower speed, proceed as follows:
1. Motor speed Tap wiring must remain in factory position
on the control board and motor.
2. There are 4 speed Tap wires to the motor T1, T2, T3, T4.
3. There are 5 speeds available, depending on DIP switch
settings and found in air flow table for each size furnace.
4. Cooling Speed can be adjusted by adjusting S1-1, S1-2,
S1-3 (see cooling airflow Chart for reference).
5. Heating Speed can be adjusted by adjusting S2-1 , S2-2
(see heating airflow Chart).
6. Circulation / Continuous Fan speed can be adjusted
by adjusting S2-3 , S2-4 (see Circulation airflow Chart)
7. Verify proper temperature rise as outlined in the
Temperature Rise section of Startup Procedure and
Adjustment.
Motor Tap Identification
CONNECTOR ID DESCRIPTION
L LINE, L1
G GROUND
N LINE, L2
C SIGNAL COMMON 24VAC COMMON
1 TAP 1
2 TAP 2
3 TAP 3
4 TAP 4
5 TAP 5
WARNING
CONNECTOR VOLTAGE
LINE, L1
CHASSIS GROUND
LINE, L2
24VAC
24VAC
24VAC
24VAC
24VAC
S1-4
ON
OFF
1 2
Position OFF OFF OFF ON OFF OFF ON ON OFF OFF ON OFF OFF OFF ON OFF ON ON ON OFF ON ON ON ON
,
Motor Speed
Y T1
COOL
.
HEAT MOTOR SPEED DIP SWITCH SETTING (S2-1, S2-2)
Position OFF OFF ON OFF ON ON OFF ON
Motor
W
Speed
HEAT
FAN MOTOR SPEED DIP SWITCH SETTING (S2-3, S2-4)
Position OFF OFF ON OFF OFF ON ON ON
Motor
G
Speed
FAN
Cooling Dip
Switches
Heat Dip
Switches
Fan Dip
Switches
In general lower heating speeds will: reduce electrical con-
sumption, lower operating sound levels of the blower, and
increase the outlet air temperature delivered to the home.
The speeds available allow the blower performance to be op-
timized for the particular homeowner's needs.
37
Heat Off Delay (S1-4)
Min Nom Max
*150
100
* = DEFAULT SETTING
COOL MOTOR SPEED DIP SWITCH SETTING (S1-1, S1-2, S1-3)
3 1 2 3 1 2 3 1 2 3 *1 2 3
T2 T3 T4 T1+T2
* = DEFAULT SETTING
1 2 *1 2
T1 T2
* = DEFAULT SETTING
*3 4 3 4
T1 T2
* = DEFAULT SETTING
Units
Seconds
Seconds
1 2 3 1 2 3 1 2 3
T1 T1 T1
1 2 1 2
T3 T4
3 4 3 4
T4 T1+T2