Fitting The Casing - Potterton NXR4 Installation, Operation & Maintenance Manual

POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
NXR4

FITTING THE CASING

Open both casing packages.
Exchanger Lagging Materials (see Fig. 11)
Cover the whole exchanger with the lagging blanket
(50mm thick) which is supplied in several 3.2m long
strips.
Assemble the strips using pins.
Wedge the ends of the lagging blanket between the
exchanger and tie rods.
Vertical Uprights (40 & 41)
Place the vertical uprights on the boiler front (two
screws HM8 x 16 with washers).
Do the same at the back of the boiler.
Left & Right Hand Cross Member (42, 43, 43a & 44).
For boiler sizes 412 to 417 the cross member is
supplied in two pieces with a splice plate (43a).
Assemble these two half cross members (43 & 44)
using the splice plate to join them.
Mount the cross members with a larger stud vertical
on the uprights. Secure with one M8 x 16 screw in the
front square hole and one M8 x 16 screw with washer
in the rear oblong hole.
Align the front ends of the cross members with the
vertical uprights on the front of the boiler.
Securely fasten the uprights and the cross members.
Front Top Panel (45)
Place the front top panel on the cross members with
the locking pegs pointing to the back. Centring is
carried out using the locking peg found underneath
the top front panel which locates in the square hole in
the top of the cross member. Secure using two M5
screws in the oblong holes.
Top Panels
Assemble as per Fig. 12 working from the front top
panel locating the locking pegs in the square holes.
Put two M5 screws in the oblong holes but do not
tighten.
Right & Left Front Panels (47 & 48)
Hook the side front panel onto the top front panel
using the two locking pegs. The side panel locking
pegs are located on the front.
Side Fastening Bracket (49)
Insert the side panel fastening bracket pin into the
lower fold of the side panel. Secure to the upright with
one M5 x 10 screw.
Fastening Pin (50)
Clip the bottom bracket onto the boiler tie rod. Insert
the pin into the side panel. Slide the pin along the tie
rod to line up with the panel.
Side Panels (51)
Place the side panels on the fastening holes of the
intermediate top panels (see Fig. 12). Rotate the
panel to clip it in the pin of the bottom bracket.
Continue in this way with the rest of the side panels
finishing with two fastening pins.
Adjustment
To carry out complete casing adjustment start on the
right, pull the top panel forwards and secure the
fastening pin screw at the bottom. Do the same on the
left front and then the rear.
Lower Back Panel (53)
Locate the panel around the manifold and slide it into
the notches.
Upper Back Metal Plate (52)
Secure in place using two M5 x 10 screws.
Right & Left Rear Side Panels (54)
Hook the left and right side panels onto the fastening
lugs.
Lower Front Panel (55)
There is a pre-cut
accommodate the flushing valve if fitted. The lagging
blanket may need to be cut. Hook onto the side panel
pegs.
Left & Right Front Panels (56 & 57)
Position these panels on the left and right of the
burner door opening using the locking pegs.
Control Panels
Assemble the panel as shown on in Fig. 14 & 15.
Upper Front Panel (58)
Locate this panel on the pins fitted in items 56 and 57.
The panel is held in position with magnetic catches.
SECTION 4
PAGE 19
recess in this panel to