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3.0 TECHNICAL SPECIFICATION
Table 3.2 Technical specification of mCHP BoilerMate
8kW thermal mCHP
Time to heat whole
10kW thermal mCHP
store (10-75ºC)
15kW thermal mCHP
6kW electric backup
Time to heat top of
'Switch'(1)
store (10-75ºC)
8kW thermal mCHP
Time to recover whole
10kW thermal mCHP
store (35-75ºc)
15kW thermal mCHP
Time to recover top of
6kW electric backup
store (35 to 75°C)
'Switch'(1)
Maximum thermal rating of the mCHP unit
Maximum pressure heating circuit
Volume of primary coil
Expansion vessel size
Allowance for hot water load (3)
DHW flow rate at 35K temperature rise (4)
Hot water draw-off volume at 35K temperature
rise & at 18 1/min (4) from fully charged store
Thermal insulation
Average thickness
characteristics
Heat loss rate(5)
Electrical Data
Electrical rating at 230V ac, 50Hz, 1 ph supply(6)
Standby mode
Maximum power
mCHP - Operating (7)
consumption at 230V
'Switch' - Operating
ac, 50Hz
Control/Boiler system
Control/Boiler system
internal circuit
'Switch' backup
Protection devices
Notes:
(1) All mCHP BoilerMate
A-CLASS
heat in the store if the output from the mCHP unit is not sufficient in extreme demand conditions, The 'switch' is also used
to provide backup heating and hot water in the rare event the mCHP unit fails.
(2) The hot water allowance used for adding to the design heat loss of the dwelling (BS6700) for sizing the thermal rating
of the mCHP unit.
(3) Based on the average store charge temperature of 77ºC and mains cold water inlet temperature of 10ºC
(4) Heat losses measured at 55K steady temperature difference as specified in the WMA Specification for Thermal Stores
(5) 6kW 'Switch' is integrated in the mCHP BoilerMate
via the two pole isolator must be rated at 6.5kW at 230V ac, 50Hz. it assumed that the mCHP unit is supplied via separate
isolator and boilerMate only provides the control signal.
(6) mCHP unit takes its power from an independent circuit via its own isolator.
min
min
min
min
min
min
min
min
kW
bar
litres
litres
W
1/min
litres
Type
mm
kWh/24h
W
W
W
W
W
W
models are fitted with a 6kW electric backup system i.e. 'Switch' which is used to boost the
A-CLASS
A-CLASS
Thermal and Electrical Data
BMA225
116
93
62
77
71
57
38
47
12
3 bar
5 litres
6 - 8 litres
750
Up to 35
250
PU-Foam, 'Zero 0DPM' and metal cased
52
2.452
BMA225
6,500 (approximate 28A) Supply must rated at 32A minimum
control system. Therefore electricity supply to the appliance
Page 14
BMA235
131
105
70
87
81
65
43
54
15
3 bar
5 litres
6 -8 litres
1,000
Up to 35
282
52
2.635
BMA235
30
300
6,300
1 x 6A MCB
1 x 6A MCB
2 x 16A MCB
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