Control Sequence - Potterton Suprima 30 HE Installation & Service Instructions Manual

7. Control Sequence

Indicate thermistor fault
Indicate thermistor fault
Indicate circulation fault
Indicate APS stuck fault
No
Flame On Indicate false flame fault
Air Proving Lockout
No
APS On
No
Check casting
temp exceeded
thermistor
< 80C
Circulation Lockout
Fig. 22
26
intelligently applied technology
Standby
Switched live - ON
On/Off switch - ON
No
Check
thermistors
give valid
readings
Pump ON
No
Check
thermistors
read within 8C
No
Check
casting thermistor
< 76C
No
APS
Off
No
Flow temp
< (setpoint -6C)
No
Flow temp
Overheat Lockout
< 100C
No
Pre-purge 10 secs.
No
APS On
Indicate APS fault
No
Flame Off Indicate false flame fault
No
Overheat
stat Off
Ignition 5
secs.
No
Flame On
No
APS Off 4
times in
15 mins
No
Overheat
stat Off
No
Casting
Go to **
4 times
Run
Yes
Safety shutdown
5 mins
Yes
Fault
condition
> 10 mins
Check
flow thermistor
> casting
thermistor
Overheat Lockout
Flow
temperature
< setpoint
Ignition Lockout
Overheat
No
5 ignition
stat Off
attempts made
Check
thermistors
give valid
Overheat Lockout
readings
Switched
live On
On/Off switch
On
Yes
Flow
temperature
> 100C
Pump overrun
Overheat Lockout
2 mins
Flow
temperature
> 100C or
Yes
overheat
stat Off
Ignition
attempt or
casting
thermistor
fault
Post purge
5 secs
Burner
Off
No
Indicate water circulation fault
No
No
Overheat Lockout
No
Indicate thermistor fault
No
** from
"casting temp
exceeded
4 times"
© Baxi Heating UK Limited 2005