Amana 10759833 Installation Instructions Manual

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Brand: Amana

Category: Furnace

Type: Installation instructions manual for Amana 10759833

Pages: 45

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2929
Adjust Circulator Blower Speeds
WARNING
To avoid death or personal injury due to electrical
shock, turn off power to the furnace before changing
speed taps.
All furnaces are shipped with heating speed set at “B” and
cooling speed set at “D”. Use the following procedure to
select the heating and cooling speed needed for your unit.
Use the CFM LED (green), adjacent to the integrated
control module fuse to verify airflow quantity. The green
CFM LED blinks once for each 100 CFM of airflow.
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
flows between 350 and 450 CFM per ton. Most manu-
facturers recommend an air flow of about 400 CFM per
ton.
Example: 2.5 tons X 400 CFM per ton = 1000 CFM
The cooling system manufacturer’s instructions must be
checked for required air flow. Any electronic air cleaners
or other devices may require specific air flows, consult
installation instructions of those devices for requirements.
3. Knowing the furnace model, locate the high stage
cooling air flow charts in the specification sheet. Look
up the cooling air flow determined in step 2 and find the
required cooling speed and adjustment setting.
Example: A 70 kBtu furnace is to be installed with a
2.5 ton air conditioning system. The air
flow needed is 1000 CFM. Using the cool-
ing speed chart for the 70 kBtu furnace,
find the airflow closest to 1000 CFM. A
cooling airflow of 990 CFM can be at-
tained by setting the cooling speed to “C”
and the adjustment to “-” (minus).
NOTE: Continuous Fan Speed will be
56% of high stage cooling.
4. Locate the blower speed selection DIP switches on the
integrated control module. Select the desired “cool-
ing” speed tap by positioning switches 1 and 2 appro-
priately. Select the desired “adjust” tap by positioning
switches 3 and 4 appropriately. Refer to the following
figure for switch positions and their corresponding
taps. Turn off power to furnace for a minimum of
10
seconds, allowing motor to reset and recognize new
speed selection. Turn on power to furnace. Verify
CFM by counting the number of times the green CFM
LED blinks.
5. Select the heating speed from the heating speed chart
in the specification sheet for your model. The adjust
setting (already established by the cooling speed
selection) determines which set of speeds are avail-
able. The selected speed must provide a temperature
rise within the rise range listed with the particular
model.
Example: The 70 kBtu is set for 990 CFM on cooling,
the “ADJUST” is set to “-” (minus). The
four heating speeds available are “A Mi-
nus”, “B Minus”, “C Minus”, and “D Minus”.
“B Minus” has a rise of 56°F for both
stages which is within the 30-60°F rise
range for the 70 kBtu. This setting will
keep electrical consumption to a mini-
mum. Set the “Heat” speed DIP switches
to “A”.
6. Select the desired “heating” speed tap by positioning
switches 7 and 8 appropriately. Refer to figure above.
Turn off power to furnace for a minimum of 10 seconds,
allowing motor to reset and recognize new speed
selection. Turn on power to furnace. Verify selected
CFM by counting the green CFM LED blinks.
In general lower heating speeds will: reduce electrical
consumption, lower operating sound levels of the blower,
and increase the outlet air temperature delivered to the
home. The speeds available allow the blower perfor-
mance to be optimized for the particular homeowner’s
needs.
Startup Procedure and Adjustment