Chappee NXR3 Installation Manual Download Page 10

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Ref. : CH - 1249 - A - 2

Method

•

Assemble the 8 studs 12 x 65 around the rear section’s start and return orifices.

• If necessary, insert the distributor (see figure 22) in the return orifice by interpolating the seal

(13).

• Place the boiler in its final position and level it, which would be made easier by the "Adjustable

legs" option (chapter 3 . 1)

• Screw the pocket and the reducer (7) in a leaktight manner in the front section’s upper orifice.

• A threaded orifice Ø 2" is provided at the bottom of the front section, for mounting a valve

enabling rinsing and flushing of the installation’s sludge (we recommend mounting coil, a 90°
bend and the valve). A pre-cut space allows for passing the tubing in the casing’s lower
panel.

• Mount a drain valve tightly (not provided) on the installation or in the lower part of the rear

section using a reducer (not provided).

• A drain valve Ø 3/4" is delivered with the "Connection sleeves" option (see chapter4 . 2).

• Connect the flanges on the installation’s tubing, than fasten them on the boiler, interpolating

the seal (13), with 4 HM 12 nuts and 4 washers for each.

• After having checked the connections, proceed slowly with filling the installation, ensuring all

the air is vented, then proceed to the hydraulic test ((1.3 x P. operation) to check all leaktight
areas.

• Screw the shortest threaded part of the 4 studs M 8 x 40 in the rear section in the upper part.
• Check that the leaktightness braid (21) is in place.
• Engage the smoke box on the studs and fasten it (4 HM nuts and 4 washers) by tightening

the nuts moderately and simultaneously.

• Connect the boiler to the stack in the most direct possible manner and without reduction of

the size of the smoke duct. Ensure that the latter is leaktight.

• Insert the assembled baffles (18) in the upper "flue-ways" and, if need be, the simple baffles

(18a) in the lower "flue-ways" (see chapter 4 . 3).

• Screw the small threaded part of the 8 studs M 8 x 40 in the front section following the

indications of figure 10.

• Define the opening side for the doors.
• Mount the hinges (1 screw HM 10 x 30 + 1 nut HM 10 + 2 washers L 10 for each guide). The

door guide is located opposite the hinges, in the upper part.

• Depending on the chosen opening side, secure the hinge (9a) on each door using 2 screws

HM 12 x 35 + 2 washers M 12.

Caution:

For reasons of practicality, it is recommended to mount the firebox door first.

• Mount the doors on the hinges using the axes (11).
• Engage the doors on the studs and fasten them (4 nuts HM 10 and 4 washers L 10 for each

door), tightening the nuts lightly and simultaneously.

• Depending on the size of its fixation, the burner is mounted directly on the door, or via a

perforated plate (see figure 11). Mount the burner plate (4 screws HM 12 x 35 + 2 washers
M 12) on the chamber door, interpolating the leaktightness seal (29).
- A plain plate may be provided on request.

3 . 4 Operational assembly diagram

Operation

Open the "chamber accessories" parcel

Distributor (14 - 14a)

Installing the boiler

Sensor pocket (8)

Sludge flushing

Drain valve (16)

Welding- flange (12)

Filling and hydraulic test

Smoke box (19 - 19a)

Stack