Worcester Greenstar i System ErP Series User Manual

Fault finding and diagnosis
Greenstar i System
ErP
- 6 720 806 945 (2015/07)72
8.3 Heating function
Fig. 97 Central heating function
6720806945-31.2Wo
MAINS
POWER
SUPPLY
ON
APPLIANCE
DEMAND
BLUE
LIGHT
ON
Fan to
start
speed
Spark
igintion
and gas
4 seconds
90 second
soft start
Fan
modulation
to achieve
set
temperature
(30-82ºC)
Gas valve
OFF
Pump overrun
3 minutes
Fan overrun
30 seconds
Over temperature
shutdown if water
temperature is 6ºC
above set value
Gas valve OFF.
Fan overrun
30 seconds
Wait until
temperature
is below set value
LOCKOUT
Stop spark
and gas.
Purge
30 seconds
5th
attempt?
BURNER
LIT?
YES
YES
NO
NO
FLAME
SYMBOL
ON
END OF
APPLIANCE
DEMAND
External switched
live demand
(if internal valve
kit is not fitted)
BLUE
LIGHT
OFF
Pump ON
INIGITION SEQUENCE
Optional integral diverter valve kit only
Optional integral diverter valve kit only
Optional integral diverter valve kit only
Diverter valve
in CH position
(down)
Diverter valve
returns to
DHW position
(up) for
DHW priority
Room
thermostat and/or
mains
programmer ON
(or link fitted)
AND
Fascia mounted
programmer
(if fitted) ON

Worcester Greenstar i System ErP Series Specifications

General

Brand	Worcester
Model	Greenstar i System ErP Series
Category	Boiler
Language	English