28
Hoval STU Wood Pellet Boiler
Control Details and Safety Features
Fig. 1
Important
The LRP control requires the installation of a new sensor in the flow pipe work
immediately off the boiler supplied loose by Hoval for fitting by the installer.
The installation will require a 3/4" socket welding into the flow pipe above the boiler
to accommodate the flow sensor, this sensor is the pivotal point of the stokers'
modulation system (See Fig 1).
Power-Up
When the control panel isolator is turned on the LRP 4 will power up, the two LED
lights on the front will flash until the unit has finished initialising.
The Controller Menus
The HRP/LRP controller range has a very easy to use interface. Its layout has
been designed to simplify user tasks by grouping specific functions into groups.
Setpoints, time programs and manual override are easily found by scrolling
through the menu structure.
The modifications that each user can make to the existing program will depend on
the access level that the user has been given. There are four user levels, level 1
is the lowest and level four is the highest. As the level increases the access rights
increase by building upon the previous level features:
Level 1 - View parameters and manually set plant status only.
Level 2 - As Level 1 and change times/schedules/set-points/view menus.
Level 3 - As Level 2 with change all settings and view all parameters.
Level 4 - As Level 3 with edit menus and configure the controller strategy.
To change user level hold the ESC key down for 5 seconds and then enter your password. Your password will be given to you by your
installer
The User interface is menu driven so you must select the option that you need to use and press SET to move into that option.
Turn the wheel to select the function you wish to perform.
Press SET to move into the menu. Press ESC to move out of the menu.
Manual/Status
Quick Query
Actual Values
Setpoints
Times
Menus
The pre-defined menu options are as follows:
Manual/Status
Enables users to override plant and check current status of plant/alarms.
Quick Query
A tailored screen for the end user to check common settings.
Actual Values
Check the current condition of sensors and switches.
Setpoints
View and/or modify the controller setpoints.
Times
Check or modify the controller time programs (Not used if the plant is under a B.M.S. control).
Menus
View the configured control Options.
Control
View the control strategy.
Configuration
Load new macros and configure the controller communication parameters.
The menu options above may change depending on the type of controller you are using and the access level that you have.
