NTI INSTALLATION MANUALS

Part 3 - Prepare the Boiler for Installation

TRX199C

TRX150 and TRX199

B C D E

C

F

A

A

E

1. 2. 3. 4. 5. 6. 7.

Pressure relief valve

Air purge valve

Boiler outlet temperature sensor DHW Temperature Sensor Flue gas temperature sensor

Main heat exchanger

Flame detection electrode

B

8

Silencer

10. 11. 12. 15. 16. 17. 18. 19. 21. 24. 25. 26. 27. 29.

DHW heat exchanger (Combi Models Only)

Condensate trap

Gas valve

Circulation Pump

DHW Flow Sensor (Combi Models Only)

Water pressure switch

Modulating Fan

Boiler inlet temperature sensor

Ignition electrode Air intake connection Exhaust vent connection

D

Diverter valve

By-pass

Pressure gauge

CAPTION

A

Central Heating Supply

D

DHW Cold Inlet

B

DHW Hot outlet

E

Central Heating (and Indirect Water Heater) Return

C

Gas inlet

F

Indirect Water Heater Supply

Figure 9 - Water Circuit Diagrams

20