Engineered air EngA G-TRAC2 - Modulating Room Reset (Continuous Blower Operation Only)

A G-TRAC2
IOM-25 18 of 42 Mar 99 R7
Additional technical information is also located under "Staged Resets and Overrides".
NOTE: When any override is calling, it will affect the "Calculated Set Point" and its relation with the "Temperature
Readout". It is recommended that the service technician be very familiar with these two sections of the
manual.
Modulating Room Reset (continuous blower operation only)
Dipswitch A-3 must be “on”. This option also requires a TE 6100 wired:
TE 6100
G-TRAC2
GREY
wired to terminal V
VIOLET
wired to terminal X
ORANGE
wired to terminal Y
BLUE
wired to terminal Z
As the room requires more or less heat, the modulating room thermostat increases or decreases the calculated discharge
air set point.
NOTE: If the room temperature is calling for a temperature adjustment, the “calculated” discharge temperature
set point will vary from the setting of “master” set-point.
 The room-reset feature is activated by dipswitch A-3.
 Room sensor calibration pot is labelled “ROOM CAL”.
 Reset ratio pot adjusts the reset authority (bandwidth) between 20°F and 56°F.
 Room reset band is 3°F (fixed), to fully activate reset.
The “room reset band” means any room temperature error will begin to reset the discharge air calculation set point, with
the maximum amount of discharge reset achieved when the room reaches 3°F. The actual amount reset (in degrees) varies
Pivot
Point
RESET CONTROL
Discharge Temperature
Warm Discharge
Manual Discharge Set Point
Cool Discharge
Room Hot
Room Cold
Room Temperature
Room Set Point