Weil-McLain 550 MBH Nstallation And Operation Manual page 116

®
SlimFit Series 3
Replacement parts
Burner, blower, venturi and gas train
Item Description
1 5 section burner replacement kit (includes burner, gasket and nuts)
2 6 section burner replacement kit (includes burner, gasket and nuts)
3 Blower assembly kit (includes blower, gasket, o-ring and hardware)
4 5 section venturi replacement kit (includes venturi, o-ring and gasket)
5
6 section venturi replacement kit (includes venturi, o-ring and gasket)
6 Venturi to gas pipe gasket
7 Gas valve replacement kit (includes gas valve only)
8 Gas valve to venturi piping kit (includes piping, gasket, o-ring and hardware)
9 O-Ring, gas valve to adapter pipe
10 Low gas pressure switch replacement kit (includes switch and nipple)
11 High gas pressure switch replacement kit (includes switch and nipple)
12 Gas pressure switch piping
13 Gas pressure switch harness (not shown)
14 Gas valve harness (not shown)
15 Flexible gas line
16 Air silencer
17 Inspection glass kit (includes retainer, glass, gasket and screws)
18
Ignition cable kit (not shown)
19 Ignition electrode kit (includes ignitor, gasket and hardware)
20 Venturi-to-blower o-ring (included in item 4 and item 5)
21 Blower outlet gasket (included in item 3)
22 Burner gasket (included in item 1 and item 2)
Blower orifice plate for SF-550 (used for both natural gas and propane)
23
Blower orifice plate for SF-750 (used only on SF-750 propane)
116
COMMERCIAL CONDENSING GAS
(continued)
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FIRED WATER BOILER
Boiler Manual
Part Number for
SlimFit 550/750
383-600-044
383-600-043
383-600-045
383-600-067
383-600-068
590-300-022
383-600-066
383-600-046
590-318-042
383-600-049
383-600-048
383-600-047
383-600-059
591-391-960
560-900-021
560-900-020
383-500-020
383-500-619
383-600-070
590-318-041
590-300-018
590-300-011
383-600-078
See propane conversion kit
(Figure 90, page 108)
Part number 550-100-168/0516