Potterton NXR3 Installation, Operation And Maintenance Manual page 13

POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
NXR3
BOILER ERECTION
SECTION ASSEMBLY
The boiler sections are not self-supporting until the
boiler block is fully assembled. The sections are
connected using a nipple system. To ensure a sound
water tight fit the nipple sealing paste provided must
be used. Assembly tools are provided for assembling
the sections.
IMPORTANT: Ensure the boiler is adequately
supported especially when pulling up sections.
The Manual Handling Regulations should be
followed.
Erect the Boilers as follows:-
1. Open the boiler fittings box.
2. Clean the nipples using a solvent cleaner
removing all traces of protective coating (not
supplied), ensuring all guidelines are followed.
3. Clean both the top and bottom nipple ports of all
sections with a solvent cleaner and ensure that
they are rust free, dirt-free and burr free, if
necessary clean with emery cloth.
Fig. 4 – Section Assembly Showing Installation of Sealing Cord, Nipples & Final Sealing Cord Tightness
Outside
Tightening of the
Sealing Cord
Section Orientation
Marking
Separation Lug
4. Stand the rear section up and ensure that it is
supported securely.
handling techniques are used.
5. Position the wooden block provided under the
centre of the bottom nipple port of the rear section
(see Fig. 4).
6. Clean the sealing cord groove on the upright
section with a solvent cleaner and a wire brush,
ensuring any rust or burrs are removed.
7. Starting from the centre of the top nipple port,
position the sealing cord without stretching it in
the groove around the rear section. Cut to length
using due care and attention.
8. Coat a nipple with the sealing paste provided and
position in the top nipple port. Repeat for the
bottom nipple port. Tap both nipples slightly into
the nipple ports using a mallet to ensure nipples
are not damaged.
Ensure that the nipples are correctly aligned
as an out of line nipple can cause the section
to crack when it is pulled up.
Wooden Block (provided)
SECTION 4
PAGE 11
Ensure correct manual
Sealing Cord
Meeting Point
Section Orientation
Marking
Place the Cord in the
Sealing Cord Groove