NTI Trinity TX101 - Fill - Low Water Pressure; Water Pressure Sensor

Display Menu Guide │ Tx I&O Manual
70
Figure 17-7 Blocking Error Navigation
Fill – Low Water Pressure
The Tx boiler is equipped with a water pressure sensor located in the return piping inside the boiler cabinet, see
Figure 19-1(e), item 24 for sensor location; the reading from the sensor is displayed on the Main Screen, see
Figure 17-2. If the control senses a pressure below 7 PSI, burner operation is inhibited and “FILL” is displayed
on the screen, see Figure 17-8. As long as the water pressure is above 3 PSI the circulators will be permitted to
operate; otherwise they are only operated 5 seconds every minute.
Figure 17-8 Fill – Low Water Pressure
Table 17-3 Lockout and Error Code Descriptions
Code
Description
Loc 1
Ignition Error – three unsuccessful ignition attempts in a row; perform the following checks:
1. Check venting for blockages.
2. Check condensate trap from proper draining.
3. Static gas pressure – if insufficient check gas supply-lines and regulator.
4. Gas pressure during ignition – if the static gas pressure is sufficient, check pressure during ignition
sequence, i.e. when gas valve opens.
a. If pressure drops below minimum (4” for NG / 8” for LP), check gas supply-line and regulator.
b. If pressure does not move, verify 120VDC at valve during ignition; if no power, check wiring
– replace control; if power is present – replace gas valve.
c. If pressure drops slightly – proceed to next step
5. Unit ignites but immediately goes out – check flame sensor (clean or replace) and flame sensor
cable, clean combustion chamber, replace control. If a combustion analyzer is available, adjust
throttle screw out 1 turn – check/adjust combustion once unit is operational.
6. Unit fails to ignite – check spark electrode and cable (replace). Verify the spark electrode is
arcing. WARNING!! – maintain clearance from ignition components while the power is on to
avoid risk of severe electrical shock.
7. Unit ignites and runs – check combustion at maximum and minimum modulation rates.
Err – indicates the
boiler has a blocking
error.
Error code - see Table
17-3 for description.
User Menu – press the
UP or Down button to
view boiler parameters.
Installer Menu – press
and hold MENU and
OK buttons to view
settings.
Water Pressure
FILL – indicates the
water pressure is too
low.