Potterton NXR4 Installation, Operation & Maintenance Manual page 18

POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
NXR4
Burner Support Plate (see Fig. 9)
Bond the ceramic fibre cord in the front section groove
(the cord should be joined on the opposite side to the
hinges).
Mount the complete sight glass (item 3) onto the door
(item 4) with the studs (item 5), washers (item 2) and
wing nuts (item 1) provided.
Place the circlip (item 19) onto the hinge pin (item 21).
Slip the male (item 18) and female (item 17) hinge
pieces and washers (items 20) onto the hinge pin.
Fit the complete assembly to the boiler using the
screws (item 15) and washers (item 10).
Fit the fastening plates (item 11) onto the boiler with
the screws (item 9) and washers (item 10). Screw the
studs (item 12) into the fastening plates.
Screw the centring nuts (item 6) onto the male hinge
piece (item 18). Fit the door onto the hinge (item 18)
and screw the other two centring nuts (item 6) onto
the hinge (item 18).
Burner Door (see Fig. 9)
Set the four stainless steel lugs (30 and 31) using the
"Rapid" fastening system on Ø8 rods.
Place the mineral wool insulation (brown) against the
door then the ceramic fibre (white) on the combustion
chamber side (see Fig. 9).
Fold the four stainless steel lugs over the ceramic
fibre.
Cut the insulation material using the burner draught
tube as a template. This can be easily cut using a
sharp knife or hacksaw blade.
Close the door and fasten using nuts (item 7) and
washers (item 8). Adjust the door to ensure a leaktight
seal by adjusting nuts (Items 6 & 7).
IMPORTANT: After a few hours operation, check
the door tightness. Adjust if necessary using the
four adjusting nuts (item 6) on the hinge side and
the two locknuts (item 7) on the opening side.
Fig. 11 – Insulation Blanket Position
Fig. 12 – Number & Width of Side Panels
Boiler Number & Width of Side Panels
Size
325 980
409
325 560
410
325 700
411
325 700
412
325 840
413
325
840
414
325 980
415
325 980
416
325 700
417
SECTION 4
PAGE 17
560
560
700
700
840
840
980
700 700