SECTION 4
POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
PAGE 14
NXR3
Fittings Assembly
1.
Position Boiler
– Position the boiler block in its
final resting position on the boiler plinth (if
applicable). Ensure all manual handling
techniques are adhered too, also ensure that a
risk assessment has been carried out.
2.
Flow & Return Studs
– Fit the 8 off 12 x 65 studs
to the flow and return ports in the rear section of
the boiler.
3.
Distributor
– (Fig. 6 – items 13, 14 and 14a). Fit
the rubber gasket to the distributor and insert the
distributor into the rear port. (4 and 5 section
models do not require a distributor).
4.
Sensor Pocket
– (Fig. 6 – items 7 and 8). Fit the
2” - ½” reducer and phial pocket into the 2”
tapping in the top of the door.
5.
Front Drain Plug
– (Fig. 6 – item 42). Fit the 2”
plug to the tapping in the bottom of the front
section.
6.
Rear Drain Plug
– Fit the 1 ½” plug to the tapping
in the bottom of the rear section.
7.
Flow Turret
– (Fig. 6 – item 17). Fit sensor pocket
and ¾” plug into turret tapings. (Fig. 6 – items 12
– 17). Fit turret to flow connection using rubber
gasket to make seal.
8.
Return Turret
– Repeat the above operations for
the return turret.
9.
Connections
– (Fig. 6 – item 12). Two off 2 ½”
BSP screwed flanges PN6, with two off rubber
gaskets are provided to make flow and return
connections.
10.
Hydraulic Testing
– Blank off all connections
then fill the boiler slowly ensuring that all the air is
vented and the boiler is completely full of water.
Proceed to 9 bar to prove soundness. This facility
is available through our Service Offices.
11.
Flue Box
– (Fig. 6 – items 19 to 19a). Screw the
short thread of the four off M8 x 40mm studs into
tappings in the upper part of the rear section.
Check the sealing braid is in place on the flue
hood (Fig. 6 – items 19 to 21). Fit the flue hood to
the studs on the rear section and secure. (The
flueway cleaning door [Fig. 6 – items 20 and 20a]
are pre-fitted to the flue hood).
12.
Flue
– Connect the flue to the boiler, ensuring that
the requirements of BS 6644: 1991 – Installation
of Gas Fired Hot Water Boilers for Inputs Between
60 kW – 2MW are adhered to.
13.
Baffles
- Insert the baffles into the upper flueways
(Fig. 7).
Fig. 7 - Baffles
14.
Front Section Hinges
– (Fig. 8) – Screw the
short thread of the eight off M8 x 40mm studs into
the front section. Mount the hinges (1 screw
HM10 x 30mm + 1 nut HM10 + 2 washers L10 for
each guide). The door guide is located opposite
the hinges, in the upper part.
Fig. 8 – Door Hinge & Guide Assembly
15.
Door Hinges
– (Fig. 6 – items 9 and 9a) Fit the
hinges to the combustion chamber door and
flueway door using two off M12 washers for each
hinge.
Upper
Baffles
Stud M10x90
Guide
Stud M10x90
Screw TH M10x30
Stud M10x90
Guide
Screw TH M10x30
Stud M10x90
Stud M10x90
Hinge
Screw TH M10x30
Screw TH M10x30
Hinge
Stud M10x90
Stud M10x90
Hinge
Screw TH M10x30
Screw TH M10x30
Hinge
Stud M10x90