Weil-McLain 550 MBH Nstallation And Operation Manual page 114

®
SlimFit Series 3
Replacement parts
Piping
Item Description
1 Supply manifold kit (Includes items 5 through 8 and 10 through 14)
2 Return pipe kit (includes items 9 and 14)
3 Inlet gas pipe kit (includes items 16, 17, and 18)
4 Supply distribution pipe
5 Serrated-flange nut, M8-1.25 (four (4) required)
6 Supply distribution manifold, 2" NPT
7 Section/manifold o-ring, 60 mm (included in Item 1; also see Item 6, Figure 95,
page 113)
8 Supply/return pipe grommet, 2" NPT x 3½" diameter (included in Item 1)
9 P/T gauge pressure sensor line check valve
10 Plug, ½" NPT
11 Low water cut-off
12 P/T gauge temperature sensor well
13 Supply temperature sensor
14 Return pipe, 2" NPT
15 Inlet gas pipe with flange
16
Inlet gas pipe gasket (included in Item 3)
17 Screws, 3/8-16 x ½", button head; washers, 3/8" SAE (4 of each required)
114
COMMERCIAL CONDENSING GAS
(continued)
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FIRED WATER BOILER
Boiler Manual
Boiler
Part Number
Models
550 / 750 383-600-055
550 / 750 383-600-035
550 / 750 383-600-056
See Figure 95, page 113
550 / 750 In Item 1
550 / 750 In Item 1
550 / 750 590-318-039
550 / 750 562-248-747
550 / 750 383-500-275
550 / 750 In Item 1
550 / 750 383-600-069
550 / 750 383-500-270
See Figure 101, page 119
550 / 750 In Item 2
550 / 750 In Item 3
550 / 750 590-300-017
550 / 750 In Item 3
Part number 550-100-168/0516