Parts breakdown diagrams of the CX-series boilers

The diagrams and tables below identify the parts of the boiler, including part numbers that you will need when ordering new parts.

  Note

Replacement parts are sold as part of a kit (e.g., P-242). For more information, see Service parts.

Exploded view of  cabinet

Item Description P-kit # Qty
1 Top access cover - CX 150 P-1628 1
Top access cover - CX 199 P-1629 1
2 Exhaust duct P-1634 1
3 Intake duct P-391 1
4 Temperature sensor P-361 1
5 Safety Ignition Module plus (SIM+) P-271B 1
6 Front door cover - CX 150 P-1630 1
  Front door cover - CX 199 P-1631 1
7 Thumb screw   2
8 Terminal block cover   1
9 V-10 touchscreen controller P-242B 1
CBI board (in V-10, not visible) P-1616 1
10 Transformer P-9059 1

Exploded view

Item Description P-kit replacement # Quantity
1 Fan/fan coupler assembly P-1608 1
2 Polidoro mixer - CX 150 NG  P-1601 1
Polidoro mixer - CX 150 LP P-1600 1
Polidoro mixer - CX 199 NG  P-1603 1
Polidoro mixer - CX 199 LP P-1602 1
3 Fan gasket P-1625 1
4 Fan insert P-1520B 1
5 Ignitor P-1511 1
6 Ignitor gasket P-117 1
7 Sight glass P-107A 1
8 Heat exchanger lid - CX 150 P-1524 1
Heat exchanger lid - CX 199 P-1528 1
9 Refractory and heat exchanger lid gasket - CX 150 P-1525 1
Refractory and heat exchanger lid gasket - CX 199 P-1529 1
10 Burner gasket P-1625 1
11 Burner - CX 150 P-1526 1
  Burner - CX 199 P-1530 1
12 Rollout switch P-9070 1
13 Heat exchanger - CX 150 P-1523 1
Heat exchanger - CX 199 P-1527 1
14 O-ring with brass inner brace   1
15 Manual air vent P-1219 1
16 Supply temperature sensor P-9061 1
17 Low water cutoff probe P-9061 1
18 Supply water pipe P-1604 1
19 O-ring with brass inner brace   1
20 Return water temperature sensor P-1011 1
21 Return water pipe P-1605 1
22 Condensate pipe P-1609 1
23 O-ring with brass inner brace   1

24

Condensate trap P-115 1
25 On-Demand DHW block (DHW heat exchanger block and pump) P-1606 1
26 Gas inlet, 3/4G to 1/2 NPT P-408 1
27, 29 Inlet gas line union gasket P-1522 2
28 Flex gas line P-1610 1
30 Gas valve P-326B 1
31 Gasket, gas valve outlet pipe to gas valve   1
32 Gas valve outlet pipe P-1611 1
33 Gasket, gas valve outlet pipe to mixer P-1522 1