NTI INSTALLATION MANUALS

Part 4 - Water Piping

Connect the 3/4” DHW inlet and outlet pipes. A shut-o valve between the city water supply and DHW inlet is recommended for ease of service. Connect the 1” CH return and supply pipes. Isolation valves are recommended for ease of service.

TRX085 or TRX120 only Heating

TRX110C

I L

I L

C

C

40

20

60

psi

80

0

40

20

60

250

0

20

psi

80

0

50

200

250

0

20

100 150

50

200

100 150

A

A

B

D

E

E

TRX150C

TRX085 or TRX120 with Indirect Water Heater

I L

I L

C

C

40

20

60

psi

40

80

0

20

60

psi

250

0

20

80

0

250

0

20

50

200

100 150

50

200

100 150

A

A

B

B

D

E

E

TRX085 - TRX120

TRX110C - TRX150C

A. CH Supply 1” B. Return from Indirect Water Heater 3/4" C. Gas Inlet 3/4" D. Not Used E. CH Return 1” I. Condensate Discharge L. Drain Valve

A. CH Supply 1” B. DHW Outlet 3/4"

C. Gas Inlet 3/4" D. DHW Inlet 3/4" E. CH Return 1” I. Condensate Discharge L. Drain Valve

Figure 14 - Water / Gas Connections

26