Suggested Settings Re Hunting Problems - EngA C-TRAC2 Installation, Operation And Maintenance Manual

A
and calibrate discharge set point by connecting 1000 resistor across terminals "Q" and "M". Set the
discharge air set point to 70ºF and adjust pot 2 (discharge calibration) until the internal time delay light is
off.

Next, turn dipswitch 4 ON to activate ambient reset feature. Disconnect the ambient sensor leads at the
ambient sensor (usually TE 6000-960) and wire an 881  resistor across the leads in place of the TE
6000.

Adjust pot 4 until the internal time delay light shuts off. This completes the actual calibration. (881
resistor, above, equates to 39ºF at which point no reset is to occur.) This checkout procedure is for a C-
TRAC2.1 wiring diagram with resistor value of 324 wired between C-TRAC2.1 terminal V and the
ambient sensor. If this resistor is not a 324 (the most common version), but is either a 402 or 365 ohm,
this calibration will be slightly off.
This calibration results in the discharge temperature calculated set point being warmer at 80ºF outside
air temp and maximum downward reset occurring at 20ºF outside air temp. The bandwidth of the reset
is adjustable on pot 8. (See C-TRAC2.1 set up sheets on Page 19 for values.)

Suggested Settings Re Hunting Problems

C-TRAC2.1 with DJM may modulate through 20 degrees.
DJM-2 This control has a different response time and should give reduced temperature swings.
Refer to DJM2 Manual.
C-TRAC2.1 with G-TRAC with TE 6000-960 discharge sensor – may modulate through 20 degrees.
Set C-TRAC Pots
P3 = 6 min. as high as 9
P6 = 5 ***
P11 = 2
C-TRAC2.1 with G-TRAC and hyper sensor – may modulate through 10 degrees.
Set C-TRAC Pots
P3 = 6 min. as high as 9
P6 = 5 ***
P11 = 2
***On C-TRAC2.1 pot 6 does not exist.
IOM-12
C-TRAC2.1 MANUAL
Set G-TRAC Pots
P5 = 2
P6 = 4
P8 = 4
Set G-TRAC Pots
P5 = 2
P6 = 4
P8 = 4
Page 17

March 1999 R1