NTI TRX - 6 Month Maintenance - To Be Performed by Owner; Annual Maintenance - To Only Be Performed by a Qualified Service Technician

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Part 4 - Maintenance Procedures
Operate Pressure Relief Valve
• Before proceeding, verify that the relief valve has been piped to a
safe place of discharge, avoiding any possibility of scalding from hot
water.
• Read the pressure gauges to ensure the system is pressurized.
Normal CH pressure will range from 15 - 30 psi. Boiler may not
operate if pressure is lower than 15 psi.
• Lift the relief valve top lever slightly, allowing water to relieve
through the valve and discharge piping.
• If water flows freely, release the lever and allow the valve to seat.
Watch the end of the relief valve discharge pipe to ensure that
D. Annual Maintenance - To Only Be Performed by a
Qualified Service Technician
Check the Burner
The burner should be checked and cleaned only by a qualified service
technician.
Clean the Combustion Chamber
Cleaning the boiler combustion chamber heat exchanger is a
complicated procedure that should only be performed by a qualified
service technician.
Check CH Loop Water Quality
Ensure CH Loop Water Quality is within the requirements in the
installation manual.
Combi Models - Flush DHW Loop
The DHW loop may require more than annual cleaning depending on
water quality, temperature, and usage.
NOTE: Flushing the boiler heat exchanger and CH and DHW loops are
complicated procedures that should only be performed by a qualified
service technician.
NOTE: Improper maintenance WILL VOID boiler warranty.
See boiler Installation Manual for list of Maintenance procedures as
well as instructions for replacing components.
Visually inspect the intake piping for any signs of blockage. Inspect
the entire length of the intake pipe to ensure piping is intact and all
joints are properly sealed. Inspect the intake pipe bracing. Ensure
bracing is undamaged and in good condition. Notify a qualified service
technician if any problems are found.
Check Pressure Relief Valves
• Visually inspect the primary pressure relief valves and discharge
pipes for signs of weeping or leakage.
• If the pressure relief valves often weep, the expansion tank may
not be operating properly. Immediately contact a qualified service
technician to inspect the boiler and system.
Check Exhaust Vent Condensate Drain System
• While the boiler is running, check the discharge end of the
condensate drain tubing. Ensure no flue gas is leaking from the
condensate drain tubing by holding your fingers near the opening.
• If you notice flue gas leaking from the opening, this indicates a dry
condensate trap. If problem persists, contact a qualified service
technician to inspect the boiler and condensate line and refill the
condensate trap.
• If applicable, check the condensate neutralizer and ensure it is full
of condensate neutralizing marble chips.
C. 6 Month Maintenance - To Be Performed by Owner
Check Primary and Gas Piping
• Remove the boiler cover and perform a gas leak inspection
following Operating Instructions, page 2, this manual. If gas odor
or leak is detected, follow procedures on page 2. Call a qualified
service technician.
• Visually inspect for leaks around the internal boiler water
connections and around the heat exchanger. Visually inspect the
external system piping, circulators, and system components and
fittings. Immediately call a qualified service technician to repair any
leaks.
WARNING
WARNING
Have leaks xed at once by a qualied service technician. Failure to
comply could result in substantial property damage, severe personal
injury, or death.
To avoid water damage or scalding due to relief valve operation, a
discharge line must be connected to the valve outlet and directed
to a safe place of disposal. This discharge line must be installed
by a qualied service technician or heating/plumbing installer in
accordance with the boiler installation manual. The discharge line
must be terminated so as to eliminate possibility of severe burns or
property damage should the valve discharge.
the valve does not weep after the line has had time to drain. If the
valve weeps, lift the lever again to attempt to clean the valve seat. If
the valve does not properly seat and continues to weep, contact a
qualified service technician to inspect the valve and system.
• Repeat the process on any other relief valves.
• If water does not flow from the valve when you completely lift the
lever, the valve or discharge line may be blocked. Immediately shut
the boiler down per instructions on page 2 and call a qualified
service technician to inspect the valve and system.