Waterway Sealing - Potterton Isis HE Installation, Operation & Maintenance Manual

SECTION 4
PAGE 12
Boiler Erection

Waterway Sealing

The waterway sections are sealed at assembly with
silicone rubber compound (Flytande-Packning 260)
and boiler sealing cement (Brandkitt-1000 Palokitti
1000). The waterway sealing grooves must be
cleaned and primed with the primer liquid before
applying the sealant. The primer must be dry before
applying the sealant.
The silicone rubber compound and boiler sealing
cement are supplied in cartridges which should be
loaded into the sealant gun. The primer liquid is
supplied in a bottle and is applied by hand (see
Fig.4).
All sealing grooves must be primed and then filled
with the appropriate sealant to form a bead
approximately 5mm (1/4") proud. This is obtained by
cutting the correct size aperture in the cartridge
nozzle.
If the nozzle is not cut to approximately 5mm (1/4")
diameter an incorrect amount of sealant will be
applied. When piercing the sealant tube direct the
nozzle away from the face or hands to minimise the
risk of skin contact.
Before commencing sealing operations sealant and
primer must be checked to ensure that there is
sufficient for the sections being erected (see table 4
for specific quantities). It is advisable to keep spare
cartridges to hand if these are available, particularly
for the boiler cement as some cartridges may contain
a certain percentage of water, which should be safely
drained off before use.
The sealants and sealant gun, which are supplied
with the boiler, are classified as consumables. In
addition to this items standard boiler erection tools
will be required. These should include a crowbar,
heavy duty adjustable wrench and a jack for raising
the firing door.
Erection procedure
Waterway Sections
1. Check off all materials and parts against the
delivery document and boiler parts list (Section 7)
ensuring that a sealant gun and adequate supply
of sealants and primer have been provided.
2. Using a clean rag and paraffin, clean the 'O' ring
grooves and sockets on the rear waterway
section.
POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
3. Clean all sealing grooves with a wire brush and
apply the primer liquid using the applicator bottle
provided. Allow the primer to dry. This is
important otherwise the sealant may not stick.
4. Apply a coating of silicone rubber compound
5mm (1/4") proud around each of the two outer
boiler sealing grooves. See Fig.5
5. Apply a liberal coating of boiler sealing cement
around the inner sealing groove.
6. Support the rear section in its correct position on
the boiler base.
WARNING: THE SECTIONS ARE NOT SELF-
SUPPORTING UNTIL SEVERAL SECTIONS HAVE
BEEN ASSEMBLED TOGETHER. THEREFORE
WHEN STARTING TO BUILD THE BOILER THE
REAR SECTION AND ADJACENT INTERMEDIATE
SECTIONS SHOULD
SUPPORTED TO PREVENT INJURY OR DAMAGE.
DUE TO THE WEIGHT OF THE SECTIONS
ASSEMBLY SHOULD BE PERFORMED BY NO
LESS THAN TWO OPERATIVES.
ISIS HE
BE ADEQUATLEY