Trinity
│
Installation and Operation Instructions
Tx Series
64
Table 17-1
User Menu
Menu Item
Description
1-01
Current target temperature
– displays the current target temperature of the boiler outlet sensor for the
active demand (DHW or Central Heating). For central heating with outdoor reset, the calculated central
heating target temperature will be displayed.
NOTICE:
model Tx151C will display “---“ during DHW
demands.
1-02
CH setpoint (at OD = 0
⁰
F)
– displays the maximum central heat setpoint, set via Installer Menu setting 2-
01. Setting establishes the boiler operating temperature during central heat demands when the outdoor
temperature is 0
⁰
F or less.
1-03
DHW temperature
– displays the temperature reading from; (i) the Tank sensor (NTI p/n: 84632) located
in an indirect water heater or (ii) the DHW sensor inside the Tx151C 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.
1-04
DHW setpoint
– displays the DHW setpoint, set via Installer Menu setting 2-07.
1-05
DHW flow rate (gpm)
– displays the DHW flow rate sensed at the Tx151C Combi DHW sensor.
NOTICE:
when the sensor is disconnected, 0.49 is displayed.
1-06
Fan speed actual (rpm)
– displays speed at which the combustion blower is operating.
1-07
Flame signal (µA)
– displays the flame strength signal sensed from the ionization electrode, NTI p/n:
84740; minimum signal to sustain normal burner operation is 3µA. Burner operation is completely
prohibited when the signal drops below 1.5µA.
1-08
Outdoor sensor temperature
– displays reading from outdoor temperature sensor, NTI p/n: 83604.
NOTICE:
when sensor is open (not connected) display indicates -40
⁰
F/C; when sensor is shorted display
indicates 176
⁰
F/80
⁰
C and boiler will not fire on CH Modes 1 or 2.
1-09
Return sensor temperature
– displays reading from boiler inlet temperature sensor, NTI p/n: 84745.
1-10
Flue sensor temperature
– displays reading from boiler flue temperature sensor, NTI p/n: 84780. Burner
operation is inhibited when the flue temperature reading is in excess of 220
⁰
F.
NOTICE:
an open circuit
is displayed as 50
⁰
F/10
⁰
C and a blocking error “Err 78” occurs; a short circuit is displayed as 278
⁰
F/137
⁰
C
and a blocking error “Err 86” occurs.
1-11
Boiler pump
– indicates the status (On/Off) of the Boiler Pump output. Note: the Boiler Pump output is on
during all demands.
1-12
Central heat pump
– indicates the status (On/Off) of the CH Pump output. Note: the CH Pump output is
on during central heat demands; the CH Pump will turn off during priority DHW demands.
1-13
DHW pump
– indicates the status (On/Off) of the DHW Pump output. Note: the DHW Pump output is on
during priority DHW demands.
1-14
System sensor temperature
– for use only in cascade systems, displays reading from a system temperature
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.
