Electric Backup - gledhill mCHP BMA 225 Installation And Servicing Instructions

2.0 SYSTEM DESCRIPTION
2.2.5 ' SWITCH' ELECTRIC BACK UP FACILITY
The mCHP_BoilerMateA-CLASS is fitted with an electric backup facility. if the mCHP
unit does not supply heat when requested and fails to heat the store, the user has the
option of selecting the electric backup system until the mCHP appliance operation
is restored.
By moving the mode rocker on the front panel from 'normal' to 'switch' position, the
electric backup boiler ie the 'switch' will be selected and this will be indicated by
constantly lit red led on the front panel.
After the 'switch' backup system has been selected it will operate the same as the
mCHP using the same set points as discussed in previous sections and also with same
sensor error handling routines.
if the store temperature exceeds 95ºc the controller will shut the heat source and
activate the overheat safety trip lockout, the same as with a boiler.
The 'switch' backup system can be deselected at any time by the user by pressing the
mode rocker back to 'normal' position. This will be indicated by the red LED on the
front panel going off.
Page 10