Potterton NXR4, Installation, Operation & Maintenance Manual

Page: 5 / 43

CLEARANCES
The minimum boiler room clearances for access, erection and maintenance are given in Fig.2 and Fig.3, the
dimensions are minimum values. There is no minimum clearance above the boiler, however, it is recommended
that clearance is left above the top of the instrument panel to facilitate its removal. At the front of the boiler allow as
a minimum the A dimension, this is to allow access to the combustion chamber for maintenance and servicing. For
P dimension please refer to relevant burner card.
Fig.2 – Boiler Clearances
Minimum Clearance (Front)
Nu-Way Oil Nu-Way Gas Riello Oil Riello Gas EOGB Oil EOGB Gas
Model
A (mm) A (mm) A (mm) A (mm) A (mm) A (mm)
409 1580 1733 1555 1725 1807 1810
410 1580 1733 1555 1725 1807 1810
411 1580 1733 1600 1725 1807 1810
412 1580 1733 1600 1785 1807 1810
413 1542 1885 1610 1785 2086 2296
414 1542 1885 1610 1785 2086 2296
415 1542 2183 1610 2000 2086 2296
416 1686 2183 1950 2000 2086 2296
417 1686 2183 1950 2100 2086 2296
Fig.3 – Boiler Footprint/Base Details
No special plinth is required for
this boiler, a simple dry base is
sufficient. Boiler footprint and
base clearance details are given
in Fig.3.
700
500 min
P + 200
P
A
A B
150mm x 6mm Flat
Plate (Not Supplied
by Potterton)
1070
450
409 410 411 412 413 414 415 416 417
A
1320 1460 1600 1740 1880 2020 2160 2300 2440
B
1540 1680 1820 1960 2100 2240 2380 2520 2660
Provision must be made to allow free movement of the boiler on
its base.
*NOTE: Base MUST NOT protrude from rear of boiler.
SECTION 1 POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
PAGE 4
NXR4