NTI INSTALLATION MANUALS

Part 14 - Maintenance

4. Loosen the three [3] screws to release the fan from the heat exchanger. 5. Reassemble the mixer and fan assembly in the reverse order. Ensure the O-Ring (4) is installed between the mixer and fan. Failure to replace damaged or deteriorating gaskets or O-Rings will result in exhaust gas leaks, substantial property damage, severe personal injury, or death. DANGER 6. Reinstall the fan to the air inlet channel. Ensure the gasket is assembled between the fan and air inlet channel. 7. Reconnect the gas line. Replace the sealing ring. 8. Restore the electrical connections of the electrodes. 9. Reinstall the support bracket of the pressure switch. 10. Reinstall the silencer. 11. Reinstall the air pressure switch. 12. Reconnect the electrical connection of the air pressure switch. Removing the By-Pass Valve TRX085 and TRX120 The by-pass valve is located in the left hydraulic block. To remove it: 1. Ensure the boiler is drained of water. 2. Remove the securing clip from the valve. 3. Pull the by-pass valve assembly upwards.

CAUTION

Removing the By-Pass Valve TRX110C and TRX150C The by-pass valve is located in the right hydraulic block. To remove it: 1. Ensure the boiler is drained of water. 2. Rotate clockvise to unhook the locking ring of the diverter valve. It is possible to block the over ow valve insert. To do this, remove the over ow valve insert and re t it again.

3. Remove the securing clip from the valve. 4. Pull the by-pass valve assembly upwards.

Figure 117 - Remove the locking ring of the diverter valve

Figure 114 - Remove the Clip

Figure 118 - Remove the clip and pull the assembly

Figure 115 - Remove the By-Pass Valve

Figure 119 - By-Pass Valve Assembly

CAUTION

It is possible to block the over ow valve insert. To do this, remove the over ow valve insert and re t it again.

Figure 116 - By-Pass Valve Assembly

108