HAMWORTHY HEATING LTD
LILLIPUT HE
500001047/F
1
details.
The Lilliput HE boiler can be fitted with an on/off
burner for operation on Class D (35 second) fuel oil
or natural gas and LPG.
The boiler is supplied with a pre-wired control panel
which contains:
a.
A power supply light.
b.
A burner on/off switch
c.
A pump on/off switch
d.
A boiler thermostat 60-90 deg. C
e.
A temperature limiter (overheat thermostat) -
to shut down the boiler should the water
temperature in the heat exchanger exceed
100 deg. C - with manual reset
f.
A water temperature thermometer
(temperature gauge)
g.
A high low thermostat (not used with current
burner options).
The boiler is housed in a sheet steel casing which is
supplied flat-packed for on-site assembly. To
prevent damage in transit or during assembly these
panels may be protected by a plastic film on all
painted surfaces. This film MUST be removed
before first-firing the boiler. Refer to Section 7 for
casing assembly procedure.
1.3 Testing
All Lilliput HE heat exchangers are hydraulically
tested to 10 bar (145 psi) ensuring the Lilliput HE
boiler is suitable for use on systems with maximum
working pressures of up to 5 bar (73 psi).
1. GENERAL
1.1 Description
The Lilliput HE boiler range consists of 2 gas or oil
fired cast iron sectional boilers with outputs ranging
from 66.3 kW (226,2700 Btu/h) to 87.2 kW (297,526
Btu/h). Refer to Section 2.1 for details.
Lilliput HE boilers can be used individually, or in a
multiple 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 pressurisation units are available from
Hamworthy Heating Ltd for sealed systems.
1.2 Construction
Lilliput HE sectional boilers are supplied with fully
assembled heat exchangers, ready for immediate
installation.
The heat exchanger assembly consists of:
a.
A front section
b. Intermediate
sections
c.
Special intermediate section(s)
d. A
rear
section
These sections are connected to each other using
nipples, and the complete assembly is held together
by four 10mm diameter tie rods running the length of
the heat exchanger.
The section to section flue gas seal is made by a
mastic compound located in a groove around the
perimeter of the mating face of each section.
The sections are cast with extended surface fins to
increase the heat exchange area and thus enhance
thermal efficiency in use.
Lilliput HE boilers have an operating efficiency of
over 80% based on gross CV.
The heat exchanger assembly is completed by a
hinged cast iron front door and rear combustion
chamber plate, both of which are lined with ceramic
insulation material. The smoke box/flue connector
is bolted to the upper part of the rear section/rear
combustion chamber plate.
The boiler stands on four legs, leaving access for
cleaning beneath the heat exchanger.
The flow and return water connections are located
at the rear of the boiler. Refer to Section 5 for
