Trinity
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Installation and Operation Instructions
Ti Series
52
17.0 ANNUAL MAINTENANCE AND INSPECTION
This unit must be inspected at the beginning of every heating season by a Qualified Technician.
Annual Inspection Checklist
1. Lighting is smooth and consistent, and the combustion fan is noise & vibration free.
2. The condensate freely flows from the unit, and is cleaned of sediment.
3. Relief Valve and air vents are not weeping.
4. Low water cut off is flushed (if applicable)
5. Examine all venting for evidence of leaks. Ensure vent screens are cleaned and clear of debris.
6. Check the burner plate for signs of leaking.
7. The combustion chamber must be inspected and cleaned (See Combustion Chamber Cleaning Procedure below).
8. Listen for water flow noises indicating a drop in appliance water flow rate.
Important
- The hydronic system may need to be flushed to eliminate hard water scale
(Use Fernox DS-40 Descaler, NTI PN: 83450).
Combustion Chamber Cleaning Procedure
Units operating with LP Gas or in an industrial environment will have to be cleaned a minimum of once per year. Other
applications will require the combustion chamber to be cleaned after the first year of operation, with subsequent cleanings
scheduled based on the condition of the combustion chamber at the time. Unless a step is identified as model specific, the
following combustion chamber cleaning procedure is the same for all models.
Crystalline Silica
- Read carefully the warnings and handling instructions pertaining to Refractory
Ceramic Fibers before commencing any service work in the combustion chamber. Take all necessary
precautions and use recommended personal protective equipment as required.
1. Initiate a post-purge cycle to clear any gas from the combustion chamber, then turn gas valve off.
2. Access the combustion chamber by removing the aluminum burner door assembly of the appliance.
3. Remove the insulation disc (P/N 83112) located in the back of the combustion chamber to avoid damaging it during the
cleaning process. The disc is held in place with a 2.5mm "Allen-head" screw.
4. Use a vacuum with a high efficiency filter to remove any loose debris or dust.
5. Wet the inside of the combustion chamber with water. Use a garden hose with a trigger nozzle to direct pressurized
water through the gaps between the heat exchanger tubes. The water should pass in-between the heat exchanger tubes
and exit via the condensate drain. This process may require the use of some dry rags or plastic to protect electrical
components from being damaged by dripping or spraying water.
6. Use a nylon or other non-metallic brush to loosen the incrustations and any other contaminates that have remained stuck
on and in-between the tubes.
7. Repeat steps 5 and 6 until the heat exchanger is clean and water from the condensate drain runs clear.
8. Re-install the insulation disc (part no. 83112) to the back of the combustion chamber.
9. Inspect the insulation disc located on the back-side of the burner door (p/n 82769). Replace if damaged.
10. Re-install the burner door, gas-supply and Air-inlet pipe, check for gas leaks.
13. Perform the Operational Check List detailed in Section 16.0.
Replace any gaskets or insulation discs that show any signs of damage and do not re-use. Failure to
follow these instructions may result in fire, property damage or death.
