NTI Trinity TX Series Installation And Operation Manual page 61

Tx I&O Manual
Table 17-1 User Menu
Menu Item Description
Current target temperature – displays the current target temperature at the boiler outlet sensor for the
1-01
active demand (DHW or Central Heating). For central heating with outdoor reset, the calculated central
heating target temperature will be displayed. The Manager boiler of a cascade system will display the
target temperature for the system. NOTICE: Tx-Combi models will display "---" during DHW demands.
CH setpoint (at OD = 0⁰F) – displays the maximum central heat setpoint, set via Installer Menu setting 2-
1-02
01. Setting establishes the boiler operating temperature during central heat demands when the outdoor
temperature is 0⁰F or less.
DHW temperature – displays the temperature reading from; (i) the Tank sensor (NTI P/N: 84632) located
1-03
in an indirect water heater or (ii) the DHW sensor inside the Tx-Combi boiler (NTI P/N: 84907). When no
sensor is used, "OPEn" indicates an open circuit, and "CLOS" indicates a closed circuit – i.e. contact
closure from an indirect thermostat.
DHW setpoint – displays the DHW setpoint, set via Installer Menu setting 2-07.
1-04
DHW flow rate (gpm) – displays the DHW flow rate sensed at the Tx-Combi DHW sensor. NOTICE:
1-05
when the sensor is disconnected, 0.49 is displayed.
Fan speed actual (rpm) – displays speed at which the combustion blower is operating.
1-06
Flame signal (µA) – displays the flame strength signal sensed from the ionization electrode, NTI P/N:
1-07
84740; minimum signal to sustain normal burner operation is 3µA. Burner operation is completely
prohibited when the signal drops below 1.5µA.
Outdoor sensor temperature – displays reading from outdoor temperature sensor, NTI P/N: 83604.
1-08
NOTICE: when sensor is open (not connected) display indicates -40⁰F/C or "OPEn"; when sensor is
shorted display indicates 176⁰F/80⁰C or "OPEn".
Return sensor temperature – displays reading from boiler inlet temperature sensor, NTI P/N: 84745.
1-09
Flue sensor temperature – displays reading from boiler flue temperature sensor, NTI P/N: 84780. Burner
1-10
operation is inhibited when the flue temperature reading is in excess of 205⁰F. NOTICE: an open circuit
is displayed as 50⁰F/10⁰C and a blocking error "Err 78" occurs; a short circuit is displayed as 278⁰F/137⁰C
and a blocking error "Err 86" occurs.
Boiler pump – indicates the status (On/Off) of the Boiler Pump output. Note: the Boiler Pump output is on
1-11
during all demands.
Central heat pump – indicates the status (On/Off) of the CH Pump output. Note: the CH Pump output is
1-12
on during central heat demands; the CH Pump will turn off during priority DHW demands.
DHW pump – indicates the status (On/Off) of the DHW Pump output. Note: the DHW Pump output is on
1-13
during priority DHW demands.
System sensor temperature – for use only in cascade systems, displays reading from a system temperature
1-14
sensor, NTI P/N: 84010. When used, the system sensor is only wired to the managing boiler, i.e. boiler
with S4 switch set to on, and boiler address (Installer Menu setting 2-20) set to 1. NOTICE: an open
circuit is displayed as "OPEn"; a short circuit is displayed as "CLOS".
Notes:
1
Enter User Menu by pressing the UP or DOWN button; to scroll through menu options, continue pressing the UP or
DOWN button.
2
Exit User Menu by pressing the OK button.
3
User Menu is for viewing only; to adjust settings refer to the Installer Menu.
│Display Menu Guide
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