gledhill BM125 Installation And Servicing Instructions page 29

2.3 COMMISSIONING
Note: The controls within the A.C.B will not allow the heating system to function
until the store temperature has reached 60°C. Therefore although the LED bar 1
'HT' will light when heating is switched on, the heating pump (Green LED -3) will not
switch on if the store temperature is less than 60°C. Time will need to be allowed for
this to happen during initial commissioning. This will vary depending on the boiler
size and the model of the BoilerMate 2000 being used.
2. Once a temperature of 60°C has been reached on the thermal store, switch on
space heating clock/programmer and room thermostat.
•
Horizontal LED bar 1 'HT' will light.
•
Green LED 3 on the A.C.B will switch on.
Heating pump will run.
3. Switch off space heating on clock/programmer or room thermostat
•
Horizontal LED bar 1 'HT' will switch off.
•
Green LED 3 on the A.C.B will switch off.
Heating pump will switch off.
4. Open the hot tap
•
Horizontal LED bar 3 'HW' on the LED display will light.
•
Domestic hot water pump will run.
5. Close the hot water tap
•
Horizontal LED bar 3 will switch off
•
Domestic hot water pump will continue to run for a short period of time before
switching off.
6. The A.C.B incorporates a 3 minute pump overrun facility. Check green LED
2 remains lit for this period of time when the boiler switches off i.e. the
thermal store reaches temperature.
The control functions have now been checked.
Let the boiler heat the store and when the store is satisfi ed, i.e. green LED's 1 and 2
on the A.C.B are off, the radiator circuit and hot water can be checked and balanced
in the normal way.
The boiler thermostat should be left at maximum for optimum performance/
effi ciency.
When commissioning the system
• If the boiler is range rated, then adjust it to the maximum heat input.
•
Check the boiler thermostat is set to maximum.
•
Set the boiler pump speed so that the temperature difference across the
boiler is about 8°C - when the space heating is off. NOTE: For optimum
performance when using a condensing boiler such as the Keston C25 set
the boiler pump in the BoilerMate to give about 15ºC temperature rise across
the boiler.
•
Set the heating system pump speed so that the temperature difference across
the fl ow and return is not greater than 11°C.
• Check the DHW plate heat exchanger pump is set to maximum.
• Check that there is no overfl ow when the whole of the system is fully up
to temperature.
• Check that the Y type strainer on the incoming mains cold water inlet to the
appliance is clean.
Note: If the appliance is operating at mains cold water pressures below 1½ bar the
fl ow regulator fi tted on the outlet to the Y type strainer can be removed if required
to improve performance.
2.0 INSTALLATION
Because the A.C.B is able to adjust to suit the
water temperatures delivered by the boiler the
thermostat should always be set at maximum
during commissioning.
However, the boiler thermostat setting can be
reduced in summer, in the normal way, if the
appliance is being used for hot water only.
The temperature settings established during
commissioning can be checked using push
button switches sw1 and sw2 on the PCB as
described in section 3.3 Fault Finding.
The clock/programmer provided on the
appliance controls the heating system only
and should be set to suit the householders
requirements using the instructions shown
on the separate leafl et and the label on the
front of the appliance. If the appliance is fi tted
with Switch (see fi gure on page 25) the boiler
should be switched off and Switch operated
to ensure it is working correctly.
• When the selector knob is not in normal
position, the PCB, room thermostat and
the time clock are electrically isolated.
• When the selector knob is in HW only
position the plate heat exchanger pump
will run continuously at full speed.
• When the selector knob is in the HW and
HTG position, the plate heat exchanger
pump and the heating pump will run
continuously.
This product is covered by the 'Benchmark'
scheme and a separate commissioning/
service log book is included with this
product. This must be completed during
commissioning and left with the product
to meet the Warranty conditions offered
by Gledhill.
On completion:-
1. Do ensure that the electrical connection
(e.g. mains supply, room thermostat) to
the unit is correct and tight before
starting the commissioning procedure.
2. Do ensure that the functioning and
control of the system is explained to the
occupant.
These Instructions should be placed along with
the component manufacturers instructions in the
pocket provided on the rear of the front panel.
The front panel should then be refi tted.
Page 29