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TRX Series II - Installation - Startup - Maintenance Instructions
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Menu Option | Description (Range Default
ZONE 1
MAX TEMPERATURE (4.2.5)
Sets the maximum allowable setpoint temperature of the boiler when operating for zone 1 demands. (68-179°F)
179°F
MIN TEMPERATURE (4.2.6)
Sets the minimum allowable setpoint temperature of the boiler when operating for zone 1 demands. (68-179°F)
95°F
AUTO FUNCTION (Outdoor Reset)
Allows the operator to globally enable/disable the Automatic Temperature Control Mode for all zones.
On
ADVANCED SETTINGS
AUTO TEMPERATURE CONTROL MODE (4.2.1)
Sets the type of automatic temperature control for zone 1:
Fixed Outlet –
AUTO Temperature Control is off; boiler operates to the (manually adjustable) Max Temperature setting.
Basic On/Off – the boiler uses the ON/OFF condition of the room thermostat to boost/reduce the boiler target
temperature. With a starting (first time) boiler target temperature of 136°F, the function boosts the target temperature
by 7°F every 16 minutes (adjustable via the CH Boost Delay Interval setting) a call for heat is continuously active.
Similarly, the target temperature is reduced 7°F every 16 minutes that the heat call is continuously inactive. The
temperature will boost/reduce a maximum of 3 times (21°F) for a given thermostat ON/OFF cycle.
Room Temp – the boiler target temperature automatically adjusts between the Min and Max Temperature Settings,
based on the input temperature provided by an optional NTI Room Sensor.
Outdoor Temp – The boiler target temperature automatically adjusts between the Min and Max Temperature
Settings, based on the input temperature provided by the included Outdoor Sensor (or Internet Weather via WiFi
connection).
Room&Outdoor – the boiler target temperature automatically adjusts between the Min and Max Temperature
Settings, based upon the input temperatures provided by an optional NTI Room Sensor AND the included Outdoor
Sensor (or Internet Weather via WiFi connection).
Outdoor
Temp
HEATING CURVE SLOPE (4.2.2)
Sets the slope of the heating curve for zone 1. The greater the slope, the quicker the boiler target temperature rises as the
outdoor temperature decreases. Applicable when AUTO Temperature Control Mode = Outdoor Temp or Room&Outdoor. (0.2-
3.5)
1.3
HEATING CURVE OFFSET (4.2.3)
Provides a means to offset (+/-) the calculated reset boiler target temperature up or down. (-25-25). Note: the setting has no
impact if AUTO Function (Outdoor Reset) is disabled, or if Auto Slope Boost = On.
0
AUTO SLOPE BOOST (4.7.5)
Acts to automatically adjust the slope of the heating curve to better match the needs of the heating system. The function boosts the
boiler target temperature by increasing the slope 10% every 10 minutes a call for heat is continuously active, to a maximum of 2X
the Heating Curve Slope setting. While the heat call is satisfied, the slope decreases by 1% every minute to a minimum equal to
the Heating Curve Slope setting.
Off
ROOM SENSOR INFLUENCE (4.2.4)
Adjusts the influence of room temperature on target boiler temperature – a higher setting causes a greater increase to the boiler
target temperature as the indoor temperature drops below room setpoint. Applicable when AUTO Temperature Control Mode =
Room Temp or Room&Outdoor. (0-20)
4
WARM WEATHER SHUTDOWN (WWSD) (4.1.0)
When set to On, disables the zone 1 heating demand when the outdoor temperature exceeds the WWSD Threshold for longer
than the WWSD Switch Off Delay time.
WWSD THRESHOLD (4.1.1)
When set to On, disables the zone 1 heating demand when the outdoor temperature exceeds the WWSD Threshold for longer
than the WWSD Switch Off Delay time.
Off
WWSD THRESHOLD (4.1.1)
Outdoor temperature where the zone 1 heating demand is disabled – if WWSD is set to On. (32-86°F)
68°F
WWSD SWITCH OFF DELAY (4.1.2)
Length of time required for the outdoor temperature to exceed the WWSD Threshold before disabling the zone 1 heating demand. (0-
300min)
2 min
Part 9 - Controls
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