10/04/2007 14
NI802
Red, next to W
Call for electric heat, also represents the input signal (yellow wire) to the WarmFlo control board.
Green, Cool
Conventional H/C stat has an active Y function or heat pump stat reversing valve is in the cool mode (will
depend upon proper setup with RV logic jumper). For 2-speed AC this LED is illuminating during high
speed.
Amber
Represents action within ECM™ blower motor. Factory technician troubleshooting only.
Additional Information
WarmFlo Elements Mechanical Hi-Limit
For this unit there is no LED’s representing mechanical, automatic reset, hi-limit.
ECM™ Blower Motor
The “setup or programming” section outlined the peg jumper programming for selecting blower motor
speed according to the nominal or low volume heat and cool installed tons.
WarmFlo Sensing Blower Speed Override
Both WarmFlo sensors will and can set the blower to maximum CFM (independent of the heat
LO/MED/HI setup).
Whenever the duct sensor (ST) senses above 115° F
or
the outdoor (OT) is below 30°, the blower speeds
up to full 1200 CFM (SPD B).
The full speed blower action continues to the end of the thermostat cycle, independent of any change at
the ST or OT.
Room Thermostat “Fan On” Mode
This sets up continuous air at 50% of the pin jumper selected cool. The ECM™ motor is very economical
at this speed.
Handheld Analyzer/Laptop Software
This test tool and/or software is available for temperature offset, field altering the program chip
parameters and setup, and general assistance for troubleshooting.
Note:
This unit is designed to operate in a total electric application. Therefore, SOT-S and MU are not
permitted and should always remain disabled.
Troubleshooting
CFM CALCULATION
– By measuring the temperature rise across the Electro-Mate, the actual CFM
can be quite accurately determined. The airflow and Electro-Mate unit must be operating in a stable
condition for at least 10 minutes. If it is cycling on temperature limit, this calculation will be of no value.
The accuracy of this formula will depend upon uniform and average temperature rise plenum
thermometer readings and the accuracy of both the clamp-on amp meter and AC voltmeter. NOTE: The
volts x amps x 3.4 value is the same as Btuh output.
Volts x Amps x 3.4
CFM =
Temperature Rise x 1.08
