Installation and Maintenance Manual

ECM Overview and Setup
UNT-SVX07D-EN 71
Mt2 Ovspd RPM
 
Selects the rpm above which the Motor 2
will be assumed to be in an overspeed
condition and will need to be shut down.
This envelope protection value should not be
altered.
Fan Proving Fct
 
Selects which mode should be assigned to
the Binary output circuit, depending on
unit type.
This setting has to be correct for proper unit
operation of electric heat and changeover units.
AI Boost Amp
 
Boosts or attenuates the analog input
signal to compensate for long wire runs.
A value of  should be used if no voltage level
compensation is needed (i.e., voltage peak is at
10 Vdc).
AI Floor
 .
Rejects noise on the analog input lines and
sets up the engine board to turn on if the
thermostat or controller is commanding its
analog outputs on.
PulsePerRev
 
Sets up the tachometer function to be
compatible with the on-board motor and
for correct speed calculation and
calibration.
Do not change this setting as this is critical to
proper unit operation.
P Value Mtr 1
 .
Sets up the on board closed loop control to
control Motor 1 with proper stability.
Do not change this setting.
I Value Mtr 1
 .
Sets up the on board closed loop control to
control Motor 1 with proper stability.
Do not change this setting.
P Value Mtr 2
 .
Sets up the on board closed loop control to
control Motor 2 with proper stability.
Do not change this setting.
I Value Mtr 2
 .
Sets up the on board closed loop control to
control Motor 2 with proper stability.
Do not change this setting.
Ht Sens Mk Val F
 
Sets the make value for the engine board
triac output based on the thermistor input.
Operation also depends on , , and
 settings.
Ht Sens Bk Val F
 
Sets the break value for the engine board
triac output based on the thermistor input.
Operation also depends on , , and
 settings.
Ht Sens Resistor
 
Sets the input impedance of the thermistor
input.
Should be pre-set to “OUT” for Tracer ZN
controllers.
Mt 1 Ramp %/sec
 
Sets the ramp rate for Motor 1, in % per
second.
Mt 2 Ramp %/sec
 
Sets the ramp rate for Motor 2, in % per
second
EH Rmp Accel
 
Sets the acceleration factor for the electric
heat inputs.
Is used to force faster ramps when electric heat
is requested.
Ramp MAX Time
 
Sets the maximum ramp time for both
Motor 1 and Motor 2 (in seconds).
Overrides the ramp rates  and  if
the calculated ramp time exceeds
.
EH Fan off delay
 
Selects how long the fan needs to stay on
after an electric heat request has been
turned off.
Not used on fan-coil unit.
Lck Rtr Protect
 
Selects whether to use the on-board
locked rotor protection function.
This will shut down the affected motor, if
rotational response is not detected.
Table 18. Configuration settings of the ECM engine board (continued)
Description on
Unit Label
User
Interface
Name
Typical
User
Interface
Value Description
Notes:
These notes are provided for reference
only, and the ECM engine label must be
used as the ultimate guide for setting up an
engine board on specific units.
UNT-SVX07_-EN.book Page 71 Friday, April 27, 2012 9:40 AM