Technical data

The Worcester Greenstar FS CDi Regular is a floor standing
gas-fired condensing “heating only” or regular boiler. The
appliance combines within one casing a cast-aluminium
heat exchanger, fan, gas valve and other electronic and
mechanical equipment necessary to provide full
central heating.
The Greenstar FS CDi Regular
condensing boiler series
6
The Greenstar FS CDi Regular is a multi-directional room
sealed fan assisted (RSF) appliance. The flue may be run
horizontally and vertically with additional 90° and 45° bends.
The Greenstar FS CDi Regular design benefits
in operation
Whenever a demand for DHW or CH is made, the boiler’s
electronic control system is activated and the burner
electronically ignited via a flame ionisation system.
The pre-mix burner automatically adjusts to the set level.
The flow temperature of the boiler is then maintained at the
customer setting by the fascia mounted variable control.
Should the system requirements reduce during operation
(TRVs closing down etc.), and the flow temperature
exceed the customer setting then the burner will modulate
downwards to match the system demand level. Should the
flow temperature continue to rise then the burner will
be de-energised and the control system will go into an
anti-cycle mode and not allow the appliance to re-fire for a
set period.
Regular boiler layout
Cold water
storage cistern
Feed and
expansion
cistern
Hot water cylinder
Programmer
Worcester
regular boiler
Room
thermostat
Motorised
valve
Pump
Hot water to
baths, showers
and basins etc
Fluing
The Greenstar FS CDi Regular series features 2 different
sizes of multi-directional RSF flue systems, 100mm or
125mm dia.
The flue can be run horizontally or vertically with additional
90º or 45º in-line bends allowing changes of route or
direction, providing an extremely flexible and versatile fluing
system enabling the appliance to be sited virtually anywhere.
In addition an 80mm flexible flue system is available which
utilises an existing chimney in the building to route the flue
terminating on top of the chimney.
More details on our flexible flue system are shown on
pages 24-25.
Versatility
Gas
The Greenstar FS CDi Regular is manufactured in both
natural gas and Liquid Petroleum Gas (LPG) variants.
Greenstar FS CDi Regular boilers
Greenstar FS CDi Regular boilers are designed for
connection to a fully pumped heating and hot water system
i.e. S or Y plan. For this reason no plug-in controls are
available on Greenstar FS CDi Regular models. The advice
of a controls manufacturer should be sought.