NTI Ti100-200 Installation And Operation Instructions Manual page 48

Trinity │Installation and Operation Instructions
Boiler Lights
Typically an imbalance in the
rough or
Air to gas ratio
pulsates
Slight vibration can cause
noise in the residence
Fan appears
(This is not a warranty issue)
to be creating
a noise in the
Making a rubbing noise.
house
((This is not a warranty
Display Goes No power to control, blown
Blank control fuse or control failure
The following are the resistance charts for diagnosing the water and outdoor air temperature thermisters of the Trinity boiler.
1. Measure the resistance of the thermister when disconnected.
2. Using the appropriate chart, find the resistance and move either vertical (Water Sensor) or horizontal (air probe) until
the line is intersected.
3. Move 90 degrees to the corresponding temperature.
4. If the temperature is plus or minus 10 degrees, then the probe is operating correctly.
Trinity Thermistor Resistance Chart
1 Mohm Water Probe (Low Temp.)
2.25
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
50 60 70 80
Water Temperature (
100
90
80
70
60
50
40
30
20
10
0
100 75
48
1.
2.
3.
4.
Use flexible gas line to insolate the vibration noises between the gas valve
and the line.
Don't hang gas lines from floor joists.
Use rubber insulators with gas line supports.
If gas valve is not held when the gas nipple is connected, the force of
tightening the fitting can damage the valve, and warp the fan housing.
If pipe is used, the gas line must not create any forces to the valve, either
issue))
vertically (weight of line), or horizontally (misaligned connection)
1.
2.
3.
4.
90 100 110 120 130 140
o
F)
Outside 10K probe
50 25
Temperature (F)
Ensure the vent lengths are in compliance with Section 4.0.
Check venting and combustion chamber for blockage – clean
combustion chamber.
Check for proper sustained gas line pressure.
Momentarily remove the intake pipe from the boiler during ignition, if
unit lights smoothly with intake pipe disconnected reconnect and check
for proper combustion, see Section 8.0.
Reset power, if display comes back on contact NTI for assistance.
Ensure 120VAC is being supplied to the boiler.
Check the internal fuse in the Sentry – to access the internal fuse,
remove the front decal to reveal the screws securing the face plate cover.
If fuse has blown replace with equivalent.
Replace Sentry 2100 controller.
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Ti Series