HAMWORTHY HEATING LTD
29
PUREWELL VariHeat he
500001155/F
actual setpoint of the CH flow temperature. Subsequent pressing of the Up / Down key will increase / decrease
this
setpoint in 0.5°C increments. After changing the desired setpoint, the On/Off key must be pressed to save the
new setting. If the setting is not saved, the previous setting will become active after the next power down.
8.7.1.1
Boiler and Circulation Pump Operation / Fault Status Screen
This screen will be the default start-up screen, and the control will revert to this screen after 1 minute has elapsed
following the last button to be pressed. Fig 8.7 below shows the various combinations of boiler & circulation pump
Status
Description
LCD Display
Boiler OFF
Boiler is ‘Off’ based on display On/Off button
BLR: OFF
PUMP: OFF
Boiler Standby
Boiler is ‘On’ and no heat demand is active
BLR: STANDBY
PUMP: OFF
Pre-Purge
Heat demand active
BLR: PRE-PURGE
PUMP: RUN
HSi On
Hot Surface Igniter warm up period
BLR: IGNITER ON
PUMP: RUN
Gas Valve On
Safety Time period
BLR: GAS VALVE ON
PUMP: RUN
Boiler Normal Run
Flame stabilisation and normal modulation control
BLR: RUN 065%RATE
PUMP: RUN
Boiler Post Purge
End of a firing or ignition sequence
BLR: POST PURGE
PUMP: RUN
Temperature Overshoot
Blocking due to high flow temperatures
BLR: TEMP O/SHOOT
PUMP: O/RUN 05MIN
Low Gas Supply Pres-
sure
Blocking due to low gas supply pressure
BLR: LOW GAS PRES
PUMP: OFF
Flue Blocked
Blocking due to blocked flue
BLR: DRAIN BLOCKD
PUMP: OFF
Flame Simulation
Lockout due to simulation of the ionisation signal
BLR: FLAME SIMLTN
PUMP: RUN
Fan Fault
Lockout due fan speed not being achieved
BLR: FAN FAULT
PUMP: RUN
Ignition Lockout
Lockout due to no ionisation signal after ignition attempt
BLR: IGN LOCKOUT
PUMP: RUN
Overheat
Lockout due to activated Safety Limit Thermostat
BLR: OVERHEAT
PUMP: RUN
Flow Temperature Sen-
sor Fault
Lockout due to short circuit or interrupted sensor input (S1, S2 or
S3)
BLR: SENSOR FAULT
PUMP: RUN
Anti-cycling
Function
Blocking due to boiler cycle time
BLR: ANTI_CYCLING
PUMP: RUN
Service Mode
Heat demand activated by Service Mode
BLR: SERVICE MODE
PUMP: RUN
Remote Control Fault
Remote Control On/Off input operating too often. Message flashes.
BLR: REM CTRL FLT
PUMP: RUN
Servicing Notification
Scheduled service is due. Message flashes
BLR: SERVICE DUE
PUMP: RUN
Figure 8.7—Display Status Screens
