Adjusting Motor Speeds - Mars Azure Digi-Motor Guide D'installation

Digi-Motor
Electric Shock Hazard. Motor must be properly grounded.
Once installed, briefly test the motor operation in all system modes: Fan On, Heat, and Cool. Make certain the
blower is operating in the correct direction.
It is normal for the motor to experience a short delay (even a rock back and forth) before beginning operation and
ramping up to full Heat/Cool speed. In PSC mode, the ramp up to speed should be approximately 5 – 10 seconds.
In X-13 mode, the ramp up to speed should be approximately 30 – 45 seconds depending the load.
Checking System Operation
Verify that correct airflow is present in all modes of operation. Temperature rise measurements in all modes must
conform to the specifications provided by the original equipment manufacturer. If they do not, proceed to the
ADJUSTING MOTOR SPEEDS section.

Adjusting Motor Speeds

The Azure motor offers 4 speed taps for Heat/Cool modes and a 625 RPM low speed tap for constant fan use. If the
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motor being replaced by Azure
should be a starting point for establishing correct airflow.
Tap 1 Orange:
Tap 2 White or Purple: Med Low Speed
Tap 3 Gray:
Tap 4 Yellow:
Tap 5 Red:
In the event the perfect CFM for the application cannot be obtained, the optional hand held programmer (MARS No.
08502) can be used to adjust the blower speed of any of the 4 motor speed taps (625 RPM tap is fixed and cannot be
adjusted). This tool is useful for:
• Establishing necessary blower speeds in multi-stage / multi speed systems where 4 speed taps are required
• Adjusting CFM in high altitude applications
• Adjusting CFM in high humidity applications
• Providing a digital readout of the percentage of maximum speed being delivered on the tap being energized
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Installation Guide
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WARNING!
used high (Y) and medium (W) speeds, then high and medium speeds on Azure
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Low Speed (625 RPM)
Med Speed
Med High Speed
High Speed
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