Navien NHB Series Installation & Operation Manual page 125

# Description
Heat Exchanger Assembly
1
(SET) Heat Exchanger Assembly
2 Drain Pan Assembly
3 Supply Pipe (Upper)
4 Packing
5 Heat Exchanger Outlet Adapter
6 Supply Pipe (Lower)
7 Fastener
8 Supply/Return Pipe (Lower) Adapter
9 LWCO (Pressure sensor)
10 LWCO (Pressure sensor) Packing
11 Heat Exchanger Inlet Adapter
12 Return Pipe (Lower)
13 Thermistor
14 Return Pipe (Upper)
15 Drain Pan Packing
16 Exhaust Duct (Lower)
17 Exhaust Duct Clip
18 Exhaust Duct Packing (G90)
19 Exhaust Duct Packing (P85)
20 Exhaust Duct (Upper)
21 Exhaust Duct Cap
22 Exhaust Duct Packing (Upper)
23 Thermistor (Exhaust)
24 Heat Exchanger Drain Cap
25 High Limit Switch
26 O-ring (V32)
27 O-ring (P34)
28 Drain Pan Adapter
29 Drain Pan Adapter Packing
30 Screw (M4X10L)
31 Screw (M4X20L)
32 Bolt (M4X10L)
Part # Remark
30021565A
30023358A NFB-301C SERVICE KIT
30020747A
30020985A
20041401A
30021367A
30020986A
20040255A
20040244A
30022672A
20006873A
30020587A
30022921A
30012907A
30022922A
20040241A
20040242A
20042741A
20022326A
20042823A
20042575A
20029712A
20043021A
30020489A
20042237A
30002558A
20041403A
20042298A
20043016A
20043017A
20038753A
20042814A
20038757A
Appendixes 125