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TEMPTRAC INTERFACE GUIDE, GATEWAY SETUP AND POINTS LIST
Page 13 of 30
PV7069-T 03/17
Part number 129209
Centauri Boiler, Centauri Plus Boiler, VT3 Boiler:
Model Numbers: All Centauri, Centauri Plus and VT3 Boilers
Probe 1:
This temperature is displayed in yellow in the lower section of the display.
With SSBCO option, this probe is located in the top of the boiler. Without this option,
the probe is shipped uninstalled and should be installed in the BHWR piping to read
the temperature of the water entering the boiler.
Probe 2
: This temperature is displayed in red in the upper section of the display.
With SSBCO option, this probe is shipped uninstalled and is intended to be installed
in the field in
the boiler’s HWR piping. Without the SSBCO option, this probe is
installed in the top of the boiler providing the outlet water temperature.
Probe 3
: Is an Auxiliary probe that can be used for outdoor temperature or other
temperature readings. This is optional and not standard.
Alarm_AL3
: Alarm on any failure
Burner_Relay1
: Burner
Relay2
: Not used
Relay3
: Isolation Valve control when the OnTrac boiler management system is controlling.
Modulation Rate
: Modulation rate, Low fire = 0, High Fire = 100
Discrete connections:
Ext Enable:
Terminals R1
– R2, Jumper to enable. Heater ships with jumper on this. An external
enable/disable can be attached to this. (Recommend relay at boiler, min 10A at 24VAC.)
Remote Equipment
: P1 & P2, this is a contact that is driven any time a call for heat is present. Note this
is only provided if the Remote Equipment or Louver options are present.
Alarm
: A1 & A2 provide a 3 min alarm signal that is present after a failure to ignite burner for 4 minutes.
This output will be active for 3 minute and then the communication alarm will become active dropping the
call for heat and dropping this signal. It is possible to get this alarm and the alarm condition that caused
this alarm can be corrected before the 3 minutes, removing the alarm and not having a lockout or alarm
condition over communication. (3 min signal of alarm condition and potential lockout.)