HAMWORTHY HEATING LTD
MILBORNE 500 SERIES
500001130/A
2
2.0 Technical Features
Milborne 501/502 is a wall-mounted, modular,
condensing, pre-mixed and blown boiler assembly,
consisting of one (Milborne 501) or two (Milborne
502) boilers installed within one casing.
The useful power of each Boiler element reaches
48.50 kW (100%, 50°C-30°C) and is modulating
from 30% to 100%. The efficiency of each generator
reaches 108.6% (nett) in relation to the lower
heating power of natural gas (Hi); thanks to the low
temperatures of flue gas, an integrated flue gas
collector entirely in plastic can be used, having a
50mm diameter and a glass-shaped connection,
which can reach a height of 30 metres.
Milborne boiler assembly series 500 is a great
achievement as regards control, cost-effectiveness,
reliability, and flexibility. Indeed, thanks to the latest
generation electronic management, modularity and
versatility that characterise this product. This boiler
can be rapidly connected to any type of heating
system including systems for the production of
domestic hot water, simultaneously managing three
different systems operating at three different
temperatures.
Milborne 501/502 is fitted with an electronic
management system, making it possible to combine
several boiler assemblies in cascade, to create
boiler installations which can reach an installed
power exceeding 3000 kW.
Individual Boilers can be installed in cascade,
besides applying the traditional lead boiler rotation,
by means of a variable load factor, so that when the
first unit reaches a certain power percentage (e.g.
30%), the following units starts (unison control), all
with the same load factor.
This makes it possible to divide supplied power onto
several heat exchangers with a power: heat
exchanger surface ratio which is particularly useful
to exploit latent condensation heat.
The Milborne boiler offers the following main
advantages:
◊
Total pre-mixing blown air burner.
◊
Condensing heat exchanger with efficiency up
to 109%.
◊
Power from 10 to 100 kW (Single Milborne 502).
◊
Flue gas maximum temperature 80°C
◊
Ø50 mm flue gas pipe up to 30m equivalent
length per boiler module.
◊
Standard condensate discharge system in the
boiler.
◊
Fast connection of water, condensate and gas
using optional pipework header kits, with left or
right hand connections.
◊
Serial connection of E buses between the
various boiler modules and the Master control
panel.
◊
Standard outside weather compensation for
high and low CH circuits.
◊
Control of mixing valve for low temperature CH
circuit.
◊
Modulating and sequential regulation of the
power of individual boilers.
◊
Automatic rotation of lead boiler.
◊
Selection of the burner’s modulation rate within
a cascade control.
◊
Management of domestic hot water and circuits
at different temperatures, with or without
operation priority.
◊
Automatic summer/winter switchover.
◊
Anti-Legionella function (remote control only)
◊
Weekly switch-on time setting (remote control
only)
◊
Priority setting of 3rd pump as either primary or
low temperature CH pump.
(1)
See paragraph ‘flue gas exhaust’
(2) Each 90° bend in the piping reduces the
exhaust pipe maximum length by 2 metres.
