Worcester GREENSTAR HIGHFLOW 440CDI ERP Installation, Commissioning And Servicing Instructions

FAULT FINDING AND DIAGRAMS
6720818077 (2016/04) - Greenstar Highflow CDi
ErP
45
7.3 DHW function
Boiler in
standby or
CH demand.
BLUE
LIGHT
ON
Hot water demand
(overrides all other
demands).
Gas valve OFF until
temperature drops
to set level.
Delivered
temperature
too high.
End of demand.
NO YES
Check tank
temperature.
Is it still near
set point?
GAS
VALVE
OFF
Continue fan
40 seconds.
Continue pump
15 seconds.
Tank satisfied.
Modulate fan
(heat input) to
charge tank to
temperature set
by user control
(65° -75°C)
Minimum heat
imput until
50°C if boiler
unused for
long period.
Modulate fan
(heat input) to
maintain delivered
temperature se
by user control
(45° - 65°C)..
Tank demand
(overrides
CH demand).
Pump OFF
Diverter valve to
Hot Water position.
Pump ON
Ignition sequence. Ignition sequence.
6720818077-32.1Wo

Worcester GREENSTAR HIGHFLOW 440CDI ERP Specifications

General

Model	Greenstar Highflow 440CDi ErP
Category	Boiler
Type	Combi
ErP Rating	A
Hot Water Flow Rate	20 l/min
Fuel Type	Natural Gas
Gas Type	Natural Gas
Warranty	5 years
Mounting	Wall Mounted