NTI Trinity Lx 150, Инструкция по установке и эксплуатации

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Trinity Lx
│
Installation and Operation Instructions Lx Series
84
Table 17-1 Troubleshooting Chart
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Lockout or Hold 67 – ILK
OFF Insufficient water pressure (Lx150-
400 only) Ensure at least 15PSI at boiler outlet. Refer to
Supplementary Documentation section 2.0 System
Piping.
External Limit Tripped
Indication that an external limit (wired to “LIM”)
is open. Not a problem with boiler, check
external limit.
Insufficient flow for Flow Switch
(Lx500-800 only) Check plumbing, ensure circulator is operating.
Tripped Thermal Fuse (Lx500-800
only) Check Thermal Fuse on the back of the heat
exchanger (accessed from the rear of the cabinet).
If tripped contact NTI.
Tripped High Vent Pressure Switch
(Lx500-800 only) The high vent pressure switch will trip when the
combustion chamber is blocked or venting is too
restrictive. Check venting and clean combustion
chamber.
Lockout or Hold 79 – Outlet
High Limit CH or DHW settings Check if CH and/or DHW setpoint temperature
plus off hysteresis exceed “High limit” setpoint –
factory setting = 210°F (99°C).
CH or DHW pump problem
See
"
Inoperative CH or DHW pump
"
below.
Incorrect “Outlet high limit” setting Increase “Outlet high limit” setting; maximum
setting = 210°F (99°C).
Incorrect “Outlet high limit
response” setting (Lx150-400 boiler
applications only)
Unless deemed unacceptable by local installation
codes, the “Outlet high limit response” should be
set to “recycle and hold” to prevent lockout.
Lockout or Hold 81 – Delta T
limit
OR
Boiler making banging or
hissing sounds Insufficient water flow

Check Fuse
"
A
"

Check boiler pump.

Ensure plumbing is correct. Refer to
Supplementary Documentation section 2.0
System Piping. Check that water pressure is at
least 15PSI.

Boilers Only - Boiler heat transfer surfaces
may be fouled with scale or magnetite. Clean
with Fernox DS-40 Descaler and Cleanser. See
Table 10-1.
Lockout 82 – Stack limit Dirty heat exchanger Inspect and if required clean the combustion
chamber and/or heat exchanger. Refer to Section
14.0 Annual Maintenance and Inspection and
Section 10.0 System Piping.
Incorrect “Stack limit setpoint”
Unless installed in Canada with PVC exhaust
venting, set “Stack limit setpoint” to maximum
setting of 220ºF (104ºC). In Canada PVC exhaust
venting is limited to 149ºF (65ºC).
Faulty sensor Check resistance of stack sensor and compare to
thermistor resistance chart, see Table 17-2.
Lockout or Hold 85 –
Inlet/Outlet Inversion Limit Pump flowing in the wrong
direction Ensure water circulation is flowing into the boiler
at the fitting closest to the wall.
Incorrect factory sensor wiring Disconnect flue sensor cable; screen should
display “Hold 95 – Stack sensor fault”; if not
contact NTI.
Lockout or Hold 88 – Outlet
T Rise limit Insufficient water flow See Lockout or Hold 81.