The Greenstar Heatslave Oil-Fired Condensing; Combi Boiler Series - Worcester Greenstar Heatslave 12/18 Technical Information

The Greenstar Heatslave oil-fired condensing

combi boiler series

Models
The Greenstar Heatslave is supplied as standard suitable for
sealed primary water systems. The appliance contains an
expansion vessel, 3bar pressure relief valve, pressure gauge
and an automatic air vent. The appliance can be connected
to an open vent or sealed primary system.
Options
Oil
These appliances are for use on 28 sec kerosene fuel only.
Hot water mode
With the appliance in a standby condition, i.e. heatbank at
temperature set by the hot water thermostat, on a demand
for hot water the flow switch will energise the pump and
circulate primary hot water around the boiler and the plated
water to water heat exchanger. The burner will automatically
light to maintain the temperature of the heatbank.
The advantages of a combi boiler
A combi (or combination boiler) is a compact and highly
efficient unit giving all the heating and hot water you need,
with significant savings on running and installation costs.
Unlike a conventional heating and hot water system, a
combi boiler system does not store domestic hot water. It
heats water directly from the cold mains – as you use it.
There's no hot water cylinder, no tank in the loft (and so
less risk of freezing and flooding), and none of the
connecting pipe work.
Regular boiler layout
Feed and
expansion
cistern
Cold water
storage cistern
Hot water cylinder
Hot water to
baths, showers
Pump
and basins etc
Motorised
valve
Programmer
Room
thermostat
Worcester
regular boiler
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When hot water is no longer required the appliance will
continue to operate until the heatbank has returned to
temperature. Priority is always given to the production of
domestic hot water. Should the central heating be in
operation when a hot water demand is made, the supply to
the radiators will be temporarily interrupted.
Central heating mode
On a demand for central heating the diverter valve will open
and the pump will energise to circulate primary water around
the heating system. The burner will automatically light and
the radiators will heat up to the temperature set by the
heating control thermostat.
Building Regulations
Part L of the Building Regulations requires that all oil-fired
boilers installed in new and existing properties in England,
Wales and Scotland have a SEDBUK efficiency of at least
86% (bands A or B).
So you not only save space, but also reduce hot water costs
– which can account for up to 60% of a typical domestic
fuel bill.
A combi also supplies hot water at mains pressure, giving
you exhilarating power showering without the need for a
pump. And as, on average, a shower uses considerably less
water than a typical bath, the savings on hot water costs
and water consumption can be significant.
Combi boiler layout
Hot water to baths, showers
and basins etc
Room
thermostat
Worcester
combi boiler
with programmer
Cold mains
Applications
•
The Greenstar Heatslave can be installed most beneficially
where space and water storage are a problem.
•
The kitchen models have been designed for siting within a
kitchen or utility room. External models have been
designed for siting outside of the property. The output and
flow rate offered by the Greenstar Heatslave range makes
it suitable for many sizes of domestic property.
•
Because the Greenstar Heatslave provides hot water at
mains pressure, it can be used to provide powerful showers.
Advantages
•
All Greenstar oil-fired boilers operate at thermal
efficiencies of at least SEDBUK Band A, ensuring
optimum economy.
•
The optional plug-in programmer eliminates the need for
external wiring of a programmer (kitchen models only).
•
The room sealed flue ensures extremely quiet operation.
•
The Greenstar Heatslave floor standing boiler has at least
a 5mm mild steel inner primary heat exchanger surface
and a 3mm outer. This, combined with a stainless steel
secondary heat exchanger which extracts additional
latent heat within the flue gases, ensures a solid,
robust product.
Special features
•
Designed for easy installation and servicing.
•
Many years development has produced the optimum
match of burner to boiler, ensuring maximum efficiency
and exceptionally clean and quiet operation.
•
Every boiler carries a full 2-year warranty (5 years on
primary heat exchanger), with an extended-period option.*
User controls
The Greenstar Heatslave kitchen models are supplied as
standard with a light grey fascia panel. An optional 7 day
twin-channel digital programmer is available to give fully
automatic control.
When the appliance is used for central heating, provision is
made for external control by room and frost thermostats.
Thermostatic Radiator Valves (TRVs) to BS 2767:10 may be
used, but with this type of control a room thermostat is still
required to meet Building Regulations.
The Greenstar Heatslave External models fascia is concealed
behind a weatherproof access panel. A programmer should
be wired internally to the property for ease of access and
operation by the homeowner.
*Subject to conditions
Kitchen models
External models
Greenstar Heatslave literature
The appliance is dispatched complete with comprehensive
installation, maintenance and user instructions.
User operating instructions for the 7 day twin-channel
programmer are contained within the programmer box.
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