Circulator Blower Speeds - Amana xMVM97 series Installation Instructions Manual

3. Subtract the return air temperature from the supply
air temperature to determine the air temperature rise.
Allow adequate time for thermometer readings to
stabilize.
4. Adjust temperature rise by adjusting the circulator
blower speed. Increase blower speed to reduce
temperature rise. Decrease blower speed to increase
temperature rise. Refer to Startup Procedure and
Adjustment -Circulator Blower Speeds for speed
changing details.
TEMPERATURE RISE
Model
*MVM970603BXAA
*MVM970803BXAA
*MVM970804CXAA
*MVM971005CXAA
*MVM971205DXAA
*CVM970603BXAA
*CVM970803BXAA
*CVM970804CXAA
*CVM971005CXAA
Temperature Rise Measurement
HI / LO
20-50/25-55
30-60/25-55
25-55/25-55
35-65/25-55
35-65/30-60
35-65/30-60
35-65/35-65
35-65/35-65
35-65/30-60
SUPPLY
AIR
RETURN
AIR
Figure 51
C B S
IRCULATOR LOWER PEEDS
T
O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK
OFF
TURN POWER TO THE FURNACE BEFORE CHANGING SPEED TAPS
This furnace is equipped with an ECM circulator blower. The
heating blower speed is shipped set at "B", and the cooling blower
speed setting is "D". These blower speeds should be adjusted
by the installer to match the installation requirements so as to
provide the correct heating temperature rise and correct cooling
CFM.
Use the dual 7-segment LED display adjacent to the DIP switches
to obtain the approximate airflow quantity. The airflow quantity
is displayed as a number on the display, rounded to the nearest
100 CFM. The display alternates airflow delivery indication and
the operating mode indication.
Example: The airflow being delivered is 1225 CFM. The display
indicates 12. If the airflow being delivered is 1275, the display
indicates 13.
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 manufacturers
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 quantity of air, consult installation instruc-
tions of those devices for requirements.
3. Knowing the furnace model, locate the high stage cooling
air flow table. Look up the cooling air flow determined in
step 2 and find the required cooling speed and adjustment
setting.
Example: A *MVM970603BN furnace installed with a
2.5 ton air conditioning system. The air flow
needed is 1000 CFM. Looking at the cooling
speed chart for *MVM970603BN, find the air
flow closest to 1000 CFM. A cooling airflow
of 1000 CFM can be attained by selecting
the cooling speed "C" and the adjustment
to "normal".
WARNING
,
.
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