Weil-McLain 88 Water and steam boilers — Series 2 — for Gas, Light Oil, & Gas/Light Oil-Fired Burners
20 Part No. 550-100-068/0308
Install jacket
Before installing jacket
The boiler contains ceramic fiber and fiberglass materials.
Use care when handling these materials per instructions
on page 34 of this manual. Failure to comply could result
in severe personal injury.
These parts 1.
:
Plugs for unused tappings a.
Supply and return piping and steam supply header b.
Cleanout platesc.
Tankless heaters (when used), tankless heater cover plates d.
(when used), tankless heater piping (when used)
Flue damper assembly e.
Observation port assemblies f.
These parts 2.
:
Burner mounting plate and burnera.
These parts 3.
:
Water or steam gaugea.
Limit control and low water cutoffb.
Gauge glass and gauge glass cocks, tri-cocksc.
Drain cockd.
Remove jacket parts from cartons
Locate jacket cartons.1.
Remove jacket parts from cartons as needed. Leave in cartons as 2.
long as possible to avoid damage.
Jacket parts are in the boxes listed below:3.
Part Box label descriptions
Jacket screws (in jacket corner boxes)
included in
CRNR boxes
Jacket support brackets & hex nuts
BKT
Jacket side support channels, upper & lower
included in
boxes
Jacket front/rear support channels, upper & lower
Jacket front panel
Jacket back panel
Jacket side and top panels
Jacket corners
CRNR
Jacket trim
Install support brackets/channels
Place upper and lower support brackets over draw rods as shown 1.
in Figure 29, page 21. Place the brackets on the sections as given in
Figure 27. Sections are numbered from front to back.
Fasten each bracket loosely using two 5/8" nuts screwed onto the 2.
ends of the tie rods as shown.
Models 488 through 988 do not require lower support
brackets. Only upper brackets are required.
Fasten all nuts and screws loosely during assembly to
allow adjustment after all jacket frame parts are in-
stalled.
Place support brackets as listed below
Boiler Upper brackets on
sections:
Lower brackets
on sections:
488 2, 3 None
588 2, 4 None
688 2, 5 None
788 2, 6 None
888 3, 6 None
988 2, 5, 8 None
1088 3, 6, 9 6
1188 3, 6, 9 6
1288 3, 7, 10 7
1388 3, 7, 11 7
1488 3, 7, 10, 13 7
1588 2, 5, 8, 11, 14 8
1688 2, 5, 9, 12, 15 9
1788 2, 5, 9, 13, 16 9
1888 2, 6, 10, 14, 17 10
Attach the upper channels to the upper supports as 3.
shown in callouts , and , Figure 29, page 21.
Use two #10 x ½" screws at each bracket. Models
988 and larger have two-piece channels.
The side channels are labelled •
A and B in Fig-
ure 29. Figure 28 gives the lengths of the side
channel parts for each model.
The channels at the boiler front and rear are •
part numbers 426400030 & 426400031, re-
spectively.
Upper and lower side channel lengths
Boiler Upper channel lengths
(inches)
Lower channel lengths
(inches)
A B A B
488 30 NA 26 NA
588 38 NA 34 NA
688 46 NA 42 NA
788 54 NA 50 NA
888 62 NA 58 NA
988 35 35 66 NA
1088 43 35 40 34
1188 43 43 40 42
1288 51 43 48 42
1388 51 51 48 50
1488 51 59 48 58
1588 59 59 56 58
1688 67 59 64 58
1788 67 67 64 66
1888 71 71 72 66
Attach the four jacket corners to the upper channels 4.
as shown in callout , Figure 29, page 21. Corner
part numbers are: 426400054 (front left), 055 (front
right), 056 (back left), and 057 (back right).
Attach the lower side, front and rear channels to 5.
the jacket corners as shown in callouts
and
of Figure 29, page 21. Models 1088 and larger
have two-piece side channels. The channels are
labelled A and B in Figure 29. Figure 28 gives the
lengths of these parts for each model. Front and
rear lower channels are part numbers 426400032
and 426400033.
