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2.3 USER CONTROLS
The front panel controls are shown in figure 2.5 below.
2.3.1 ON-OFF SWITCH
This only isolates the control circuit power supply and therefore it should
only be used for switching the appliance off for short periods e.g. testing
and for resetting the appliance/controller to clear the lockout faults. Before
any service work is undertaken the mains electricity supplies to the
BoilerMate and the mCHP appliance must be isolated at their respective
2-pole local isolators.
2.3.2 PUSH BUTTON
This is used to reset the controller/appliance i.e. clear the lockout condition
indicated by the rapid flashing red led.
2.3.3 RED LAMP (LED)
indicates the :
Off: Normal
Slow flashing: 'Switch' backup system failure
Medium flashing: 'Switch' backup selected
Rapid flashing: Overheat/safety trip
On: 'Switch' electric backup boiler is on
SYSTEM DESCRIPTION 2.0
Figure 2.5 Appliance User Controls
2.3.4 'SWITCH' OPERATION
By moving the mode rocker on the front
panel from 'normal' to 'switch' position
the electric backup boiler (switch) can be
used as an alternative heat source for hot
water and central heating, should there
be a failure of the mCHP boiler. (See 2.2.7
Electric Backup Facility for further details)
2.3.5 CH Clock
The BoilerMate when used with an mCHP
appliance is designed to be heated
24h/day and controls ensure that the
mCHP is used efficiently with minimum
cycling. Therefore the hot water heating
is not timed and it is always available on
demand.
The built in clock can be used to set central
heating 'on' and 'off' times.
Note: if requested the mCHP BoilerMate
A-Class can be fitted with an external
2 channel programmer to time control
both hot water and central heating as an
optional extra.
Page 11
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