© MHG Heating Ltd
49
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email
Web www.mhgheating.co.uk
010711
15.0 Accessing Boiler Parameters
Control Parameter Default Settings.
All Units are preset for correct operation.
However if alterations are required to enhance the operation of the unit following the application of optional
control the procedure is detailed below.
The following Pages detail the parameters of the LMU64 controllers, For your assistance the Standard Factory
settings are indicated.
(Please note, the installer/commissioning engineer may have changed some of these settings to suit the system
installed.)
To access the parameters detailed below the boiler’s control panel must be used. (Only boilers supplied prior to
2003 will require a QAA73 Room Unit to access the control parameters. The unit must be connected to the RU
terminals or directly to the LMU64 controller via the X10:01 terminal.)
There are three levels of access available, as follows. If you cannot access a particular parameter line, please
consult with MHG Heating Ltd Technical Department for further assistance.
Level One
(User)
-
Press and release one of the
or
Program Buttons.
The display will now indicate
Use the Program Buttons to access the desired parameter line. Use the
Button to alter the displayed parameter to the required setting.
To save the adjusted parameter move to the adjacent parameter or press and
release the INFO Button if you wish to exit this level.
To exit without saving any adjustment press and release the MODE Button.
Level Two
(Installer)
-
Press & Hold the
Program Buttons simultaneously for at least 3 seconds.
The display will indicate H90
Use the Program Buttons to access the desired parameter line.
Use the
Button to alter the displayed parameter to the required setting.
To save the adjusted parameter move to the adjacent parameter or press and
release the INFO Button if you wish to exit this level.
To exit without saving any adjustment press and release the MODE Button.
Level Three
(OEM)
-
Press & Hold the
Program Buttons simultaneously for at least 9 seconds.
The display will indicate - - - - -
A password is required to access this level.
(Please contact MHG prior to accessing this as parameter level)
Use the
Program Buttons to access the desired parameter line. Use the
Button to alter the displayed parameter to the required setting.
To save the adjusted parameter move to the adjacent parameter or press and
release the INFO Button if you wish to exit this level.
To exit without saving any adjustment press and release the MODE Button.
