This release is an update to boiler controller product. For full operational details this note should be read in conjunction with Data sheet LIT/AT/BLUR/001 Iss2.0.
Alarms enhanced.
Minor correction to compensator calculation.
VT valve hunting in frost condition corrected.
Minor correction to registration of secondary heat/cool sources, number of status lamp flashes on device being registered.
Changes to ensure cycle steps stay consistant.
VT setpoint can now be read via S8 or config 58.
This version of code runs on the 0004/0002 issue E BLR DIN hardware.
The code is contained in a 27C512 prom with address line switching.
Alarm Delays
To reduce levels of network traffic on 'system power up' and high alarm activity at Doorway, a random delay of up to 1 minute (the minimum period for this delay is 20 seconds) has been incorporated into the module before alarms are reported. In addition to this subsequent alarms are also delayed i.e. if a alarm condition arises it will be reported immediately, however no further alarms will be reported from this module within the next 5 seconds.
All Stop Indication
If the boiler module has received or initiated a system 'ALL STOP' alarm this is now indicated locally to user by the error lamp flashing alternately red and yellow.
Changes to Configuration variables this issue config_variables