8
Ref. : CH - 1249 - A - 2
3 . 3 Tightening the sections
To tighten the sections, a set of assembly bars is necessary.
It comprises:
For 4- to 7- section boiler:
- 2 assembly bars, length = 1.60 m (A),
- 2 fixed plates with stop-ring (B),
- 2 mobile plates with ball nut (C),
- 1 ratchet wrench.
This set is not part of normal supplies.
For 8- and 9- section boilers:
- Same as above,
- 2 bar extensions, length = 950 mm.
Or PARCEL N° 1 + PARCEL N° 2
1) Withdraw the plates’ alignment screws,
2) Place an (
A
) installation bar in each row of nipples,
3) Mount, on each bar, at the rear, a plate with (
B
) stop-
ring,
4) Mount at the front the (
C
) plates with tightening nut,
after having lubricated the thread,
5) Align the plates,
6) tighten the screw alternately by 1/2 a turn each, taking
care to avoid fan assembly.
Proceed with tightening until the sections touch, and
check it by looking in the firebox and the upper
"flue-ways".
Fixed plate
B
Nbr. of elements
4 to 7
8 to 9
Bar
A
A + D
L dimension
1600
2550
l dimension
1355
2305
l max.
L
121
Run =
245
160
Step =
190
assembly bar
A
Extension
D
Nut
Mobile plate
C
54
70
Take alignment screws off
Stop-
ring
Fig. 7
Fig. 8
Wrench
MID
section
Nut
C
Assembly
marking
Assembly
marking
A
B
Stop-ring
REAR
section
7) Assemble the other sections (1 by 1) in the same way,
while moving the wooden blocks alternately as you go
towards the front,
8) Do not loosen the assembly bars and position the 4
assembly linkages. Tighten them properly, leaving an
equal length at each end to secure the casing’s cross
members, and if necessary the adjustable legs,
9) Loosen and take the installation bars off,
10) proceed with the boiler assembly.
NOTE: If it were necessary to dismantle one of the
boiler’s sections, and to avoid damaging the
leaktightness gorges, it is imperative, when dismantling
the sections, to place the chisel at the level of the
spacing pads (E) provided in the upper part (see
figure 5).
FRONT
BACK
Positioning aid
N0219800.PLT
N0219700.PLT
Summary of Contents for NXR3
Page 19: ...19 Ref CH 1249 A 2 ...
