Worcester Greenstar i System ErP Series User Manual

Fault finding and diagnosis
Greenstar i System
ErP
- 6 720 806 945 (2015/07)
73
8.4 Hot water cylinder function (optional integral diverter valve kit fitted)
Fig. 98 Hot water cylinder operation (optional integral diverter kit fitted)
6720806948-28.2Wo
MAINS
POWER
SUPPLY
ON
HOT WATER
DEMAND
BLUE
LIGHT
ON
Diverter valve
in DHW
position (up)
Pump 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
Diverter valve
returns to
DHW position
(up) for
DHW priority
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
HOT WATER
DEMAND
Tank
temperature
below setpoint &
demand from
hot water time
control
BLUE
LIGHT
OFF
INIGITION SEQUENCE

Worcester Greenstar i System ErP Series Specifications

General

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