EngA G-TRAC 1.1, Installation, Operation And Maintenance Manual

A

G-TRAC MANUAL 

IOM-24 

Page 8 

March 1999 R1



Place a 1005-ohm resistor across G-TRAC terminals "X and Z" to simulate 70°F 

(21°C)

. 



Connect the TE 6100-960 set-point to the G-TRAC terminals as follows: 
1.  BLUE to G-TRAC terminal Z 
2.  ORANGE to G-TRAC terminal Y 
3.  GREY to G-TRAC terminal V 



Turn the TE 6100-960 dial to 70°. 



Adjust pot 3 until the heat light just shuts off 

Method 3 



Disconnect jumper from “RR and +”. 



Set the discharge air calibration using a 1005-ohm resistor 

(to simulate 70°F)

 in place of the discharge 

sensor. Adjust set point just short of where the heat call light comes on. 



Accurately measure the room temperature next to the room sensor. 



Set the room set point to the same temperature as was measured. 



Ensure the jumper is re-installed "RR" to "+". 



Adjust pot 3 until the heat call light is just short of coming on. 

Method 4 

(May correct minor electrical noise on remote wire)



Disconnect wires to terminals “Z and X” and measure the resistance on them. Reconnect the wires. 



Compare the reading with the TE 6000 resistance chart in this document. 



Adjust the room reset set-point dial to the same value as related to the chart. 

(Also ensure “RR and +” 

are jumpered.)



Adjust pot 3 until the Heat Call light just comes on.

X.  BMS RESET OF THE DISCHARGE AIR TEMPERATURE 

The G-TRAC has the ability to accept an input from a BMS 0-10 VDC or 4-20 ma signal on the G-TRAC 
terminals "+ and -".  This is not optically isolated.  Pot "P7" sets the amount of override that the BMS signal 
will be allowed when the BMS signal is at its highest. Setting 1 is about ±32ºF and setting 5 is about ±60ºF. 
The amount of reset authority may be slightly higher when using a 0 to 10 VDC reset signal from the BMS. 

(Setting 1 = ±40ºF; setting 5 = ±75ºF).

Pot 7 Setting 

Reset Value With 0-10 VDC Signal 

4-20 ma Signal 

5 

+ 75°F 

+ 60°F 

4 

+ 68°F 

+ 54°F 

3 

+ 60°F 

+ 48°F 

2 

+ 50°F 

+ 40°F 

1 

+ 40°F 

+ 32°F 

Reset from the BMS signal will not be truly lineal. It will start to reset about 3 VDC. The reset will begin to 
ramp gently at 3 volts and ramp more steeply as the reset voltage is increased.