HAMWORTHY HEATING LTD
SHAFTESBURY SLIMLINE
500001129/A
1
1.0 INTRODUCTION
1.1 The Shaftesbury Slimline boiler range
consists of 6 gas or oil fired cast iron sectional
boilers with outputs ranging from 150kW to 290kW.
Refer to Technical Data in Appendix A.
Shaftesbury Slimline boilers can be used
individually, or in a multi-boiler configuration, and
are suitable for use on either open-vented or sealed
low temperature hot water heating systems. For hot
water production they can be used in conjunction
with calorifiers or indirect hot water cylinders.
Portland and Weymouth pressurisation units are
available from Hamworthy Heating Ltd for sealed
systems.
1.2 Shaftesbury Slimline sectional boilers can be
supplied pre-assembled or unassembled ready for
on-site assembly.
The heat exchanger consists of:
a. A front section.
b. Plain intermediate sections.
c. A rear section.
The complete assembly is held together by four
threaded tie rods running the length of the heat
exchanger.
The section to section flue gas seal is made by:
d. A mastic strip around the outer perimeter of
each section.
e. A mastic strip around the perimeter of the
combustion chamber of each section.
The sections are cast with extended surface fins to
increase the heat exchange area and thus enhance
thermal efficiency in use.
Shaftesbury Slimline boilers have an operating
efficiency of over 92% based on gross CV.
The heat exchanger assembly is completed by cast
iron front and rear combustion chamber plates and
access plates for the cleaning and inspection of the
heat exchanger flue ways (on front and rear), all of
which are internally lined with a ceramic fibre
insulation board. The smoke box/flue connector is
bolted to the upper part of the rear section and
sealed with a ceramic fibre gasket.
The Shaftesbury Slimline boiler can be fitted with
either a high/low or modulating burner for operation
on Natural Gas I2H (Second Family) or high/low
burner for operation on Class D (35 second) fuel oil.
The boiler is supplied with a pre-wired control panel
which contains:
a. A fuse
b. An illuminated mains on/off switch
c. A boiler thermostat
d. A boiler run lamp
e. A temperature limiter (overheat thermostat) to
shut down the boiler should the water
temperature in the heat exchanger exceed
110oC - with manual reset.
f. An overheat lamp
g. An hours run meter
h. A water temperature thermometer
(temperature gauge)
i. A flying lead and plug to connect to the burner
j. An additional thermostat, boiler run lamp,
hours run meter and flying lead/plug for high/
low burners.
k. A volt free relay kit for normal run, overheat
and lockout.
The boiler is housed in a powder coated sheet steel
casing which is supplied flat-packed for on-site
assembly. Refer to Section 5.3 for casing assembly
procedure.
