Ambirad Vision VSO Series Panduan Perakitan & Instruksi - Halaman 4

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All remaining 'U' bolts on the RETURN

TUBE should also be tightened to

achieve a minimum torque setting of 15Nm².

All remaining 'U' bolts on the FIRING

TUBE and the first 'U' bolt on the

FIRING TUBE on 2 module variants, should be

left loose and locked in place with a locknut to

achieve a 3mm clearance above the tube to

allow for thermal expansion (see sketch below).

Locknut

Fixed detail

2.2.3 Turbulators

There are various lengths of turbulators

(G) for the vision range. Identify correct lengths

prior to assembly. We recommend turbulators

are inserted into tubes prior to hanging.

Insert short 976mm turbulator into burner firing

tube from U BEND END.

For models 15, 20 and 25: Insert 3400mm

turbulator into return tube from U BEND END.

For models 30, 35 and 40: Insert one 2600mm

turbulator into return tube from U BEND END

and one 2600mm turbulator into return tube

from OPPOSITE END.

For models 45 and 50: Insert one 3040mm

turbulator into return tube from U BEND END

and one 3400mm* turbulator into return tube

from OPPOSITE END. * Nat Gas only

View from U tube end

2.2.4 Couplers

For fixing the U bend. Locate and position tube

couplers (D) Slide the coupler over the

components ensuring that the rivet stop has

butted up to the tube end and the pre-fitted bolts

engage in the pre-cut holes so that the socket

heads are FACING INWARDS.

Moving between the two set pins, tighten both

ensuring that equal pressure is applied to each

set pin in turn.

Floating detail

2.2.5 Coupler Bellows

For adjoining tubes on 3 and 4 module heaters,

locate and position the coupler (Q) onto the

ends of the tubes after firstly positioning a clamp

on both ends. Slide each clamp onto the bellow

ends.

Moving between the two set pins, tighten both

ensuring that equal pressure is applied to each

set pin in turn.

section 2.2.7.2.3

There is one bellow located on the firing

tube on models 30, 35 & 40:

There are two bellows located on each

tube on models 45 and 50:

Due to the length of models 45 and 50,

the coupler bellows are assembled onto

the tube ends ONCE the two halves of the

heater have been fully assembled and

hung in position see "Final Fixings"

Doc No. 700021 Page 4 of 20