AUTOFLAME Mk8 MM Installation And Commissioning Guide

5 Bottom Blowdown
Page 92 Mk8 MM Expansion Features Installation and Set-Up Guide 04.09.2016
5.4 Set-up
For a new installation, after checking the wiring, performing safety installation checks, and settings the
options, parameters and expansion options, the servomotor closed position can be set in password
protected Commissioning mode or Online Changes for an already commissioned system.
**WARNING**
ANY PERSON WORKING ON A BOILER MUST BE ADEQUATELY TRAINED AND
HAVE A THOROUGH APPRECIATION OF THE BOILER PLANT. IT IS THE
RESPONSIBILITY OF THE FACTORY TRAINED TECHNICIAN TO ENSURE THAT THE
SYSTEM OPERATION MEETS LOCAL CODES AND REGULATIONS.
When the bottom blowdown module is used as standalone, it must be configured using the bottom
blowdown configurator PC software. Please see section 5 in the Autoflame PC Software Guide for
more information.
5.4.1 Bottom Blowdown Settings
The bottom blowdown function can be set using an external solenoid valve or the bottom blowdown
module, see expansion option 60.
When a bottom blowdown time is due, the blowdown can be set to occur automatically, or by a
pressing the manual trigger on the bottom blowdown screen, see expansion 61.
Bottom blowdown reduction allows the timing of the blowdown to be adjusted according to the steam
production, see expansion option 62.
If there is no steam production when a blowdown time is due, the MM/module will ignore the
blowdown or blow down the valve for a minimum duration, see expansion option 63.
If using bottom blowdown reduction, the boiler steam production rating must be set and the fuel flow
metering must be set and commissioned, see expansion option 64 and option 57.
The industrial Unic servomotors which are used with the water valve for bottom blowdown are factory
set with the closed position at 0.0
O
and open position at 90.0
O
.
The default parked position is set the same as the closed position 0.0
O
, however this can be adjusted
using the Bottom Blowdown Board Configurator software; refer to the PC Software Guide. The parked
position is a near closed position. During a bottom blowdown event, the servomotor will move to the
parked position rather than the closed position during the valve closed interval. This allows a not fully
closed position to be set for the parked position, reducing the time take for the servomotor to drive to
90.0
O
for the valve open interval.
The table below shows a summary of the bottom blowdown expansion options.
Expansion Option Description
60 Bottom blowdown function
61 Bottom blowdown triggering
62 Bottom blowdown reduction
63 Minimum blowdown duration
64 Boiler steam production rating

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English