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

FAULT FINDING AND DIAGRAMS
Greenstar Highflow CDi
ErP
- 6720818077 (2016/04)44
7.2 Central heating function
Boiler in
standby.
BLUE
LIGHT
ON
CENTRAL
HEATING
DEMAND
Fan to start
speed.
Gas valve
open.
Pump ON.
Diverter valve
to CH
position.
5th
Attempt?
Fan run to
purge gas
from burner.
Minimum
heat input
for 15
minutes.
LOCKOUT
NO
NO
Ignition
spark 4
seconds
(max)
BURNER
LIT?
YES
NO
YES
YES
GREEN
LIGHT
ON
Burner
stabilises
at start
speed
for
5 - 10
seconds.
Fan
reduces
over
15
seconds.
Fan min.
speed
for
90
seconds.
Boiler
unused
for long
period?
Boiler
operates
to match
system load and
CH control
setting.
Over temperature
shut-down if water
temperature is
above set value.
Gas valve shuts.
Pump remains ON.
Burner remains OFF
until flow temperature
is below set value
CH demand
satisfied.
Gas value closes
GREEN light OFF.
Pump and Fan run
for up to 3 minutes.
6720818077-33.1Wo
Diverter valve
returns to the
DHW position

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