Neptronic TRT2422 Specification And Installation Instructions Download Page 3

Rooftop Thermostat Controller

Specification and Installation Instructions

 

www.neptronic.com

 

 

Page | 3

 

Mounting Instructions 

CAUTION: Remove power to avoid a risk of malfunction. 

A.  Remove the captive screw that’s holding the base and the front cover of the unit together. 
B.  Lift the front cover of the unit to separate it from the base. 
C.  Pull all wires through the holes in the base. 
D.  Secure the base to the wall using wall anchors and screws (supplied). Make the appropriate connections. 
E.  Mount the control module on the base and secure using the screw. 
 

 

Programming Mode 

The Mode Selector DIP switch (DS1) must be set to the “ON” position (Programming Mode). Refer to wiring on page 2. To exit, set the 
DIP switch back to the “OFF” position (Operation Mode). All changes will be saved. 

 

Symbols used in this Manual 

 

Temperature 

 

Heating 

 

Cooling 

 

Fan 

Schedule Mode 

Timer/clock 

 

W1 = Heating Stage 1 
W2 = Heating Stage 2 
Y1 = Cooling Stage 1 
Y2 = Cooling Stage 2 

User Control 

1.

 

“Inside Temp Sensor Offset” 

 

 

Range:  
Offset: 
Increment: 

10 to 40ºC  

[50 to 104ºF]   

Max. ± 5ºC 
0.1ºC 

 

  [0.2ºF] 

Compare the displayed temperature reading with a known value from a thermometer. To offset or calibrate the sensor, use the 
arrows key to set the desired temperature reading. This is useful for thermostats installed in areas where the temperature read is 
slightly different than the room’s actual temperature. For example, a thermostat placed right under the air diffuser. If the thermostat 
is set to use an external temperature sensor (Step 28 on page 7), the thermostat displays “OFF”. The thermostat displays “---“ if 
there an error with the sensor. 

A

E

D

C

B

C

Icon indicates in “Programming Mode”
Setting description (e.g 

“inside temper sensor offset”

)

Setting value

Advance to next setting

Return to previous setting

Change value

Summary of Contents for TRT2422

Page 1: ...ion Backlit LCD with simple icon and text driven menus Multi level lockable access menu and setpoint Selectable Fahrenheit or Celsius scale Removable connectors TRT2422 Applications 2 Heat 2 Cool Supp...

Page 2: ...ongly recommend that all Neptronic products be wired to a separate grounded transformer and that transformer shall service only Neptronic products This precaution will prevent interference with and or...

Page 3: ...sed in this Manual Temperature Heating Cooling Fan Schedule Mode Timer clock W1 Heating Stage 1 W2 Heating Stage 2 Y1 Cooling Stage 1 Y2 Cooling Stage 2 User Control 1 Inside Temp Sensor Offset Range...

Page 4: ...Default Range Increment 0 3 C 0 6 F 0 to 5 0 C 0 to 10 F 0 1 C 0 2 F Select the desired dead band value of the heating ramp The heating symbol is also displayed 6 Control Dead Band Cooling Default Ra...

Page 5: ...p 10 Contact automatically opens at 0 of the demand 13 Select W1 Direct Reverse W1 Default Range dir Direct dir Direct or rEV Reverse Select the direction for the W1 output signal Set dir Direct for n...

Page 6: ...the demand 20 Select Y1 open Percent Y1 Default Range Increment 20 of demand 0 to 80 range is limited by the close value of step 19 minus 10 5 Select the percentage at which you want Y1 to open at of...

Page 7: ...symbol is also displayed Temperature Sensor Settings 28 Extern Sensor Temp Default Range OFF OFF t10 0 external temperature sensor 10 0 K at input 14 Select the temperature sensor that will be used b...

Page 8: ...used to notify that service is required When activated Service and the symbol are displayed All control modes continue to function Airf The input is used to connect an air flow sensor When activated...

Page 9: ...es 4 enter year Default Range Increment Selection 2010 2010 to 2099 1 Year Select the year 5 enter month Range Increment Selection 01 to 12 January to December 1 month Month Select the month 6 enter d...

Page 10: ...event 1 cooling setpnt Default Range Increment Display 22 C 72 F 10 to 40 C 50 to 104 F Off 0 5 C 1 F MO Select the desired cooling temperature setpoint for the duration of Event 1 The minimum value i...

Page 11: ...ontinue Event 1 4 Events Day If the 4 events per day option was selected at step 9 16 e1 Default Range Increment Display 06 00 00 00 to Monday Event 2 start time 15 minutes 15 minutes MO E1 Set the st...

Page 12: ...t the desired heating temperature setpoint for the duration of Event 2 The maximum value is restricted by the cooling setpoint of Event 2 at step 20 Event 3 4 Events Day If the 4 events per day option...

Page 13: ...copy Monday s schedule to Tuesday Wednesday Thursday and Friday 28 copy schedul Default Range No No Yes selected day If you do not want to copy a schedule select NO The currently configured days appea...

Page 14: ...ked Yes No Select No to allow the user to change control modes Select Yes to lock the control mode to the user A lock symbol appears to indicate that the control mode is locked 32 quit Default Range Y...

Page 15: ...the arrow keys while the temperature is displayed If the setpoint adjustment has been locked Step 29 on page 13 the lock symbol appears Room temperature Appears if setpoint adjustment is locked Change...

Page 16: ...y on OFF Override Setpoint This function is only available if you have set the used time schedule option to Yes at Step 7 on page 9 When the schedule is triggered the thermostat uses the setpoints def...

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