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Specifications - Bosch PowerStar AE125 Handbook

Bosch water heater handbook for powerstar ae115, ae125
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The outlet water temperature can also vary if the maximum flow rate is exceeded (see Graph 1) or if
the supply voltage changes.
Each heater module is protected by an electro-mechanical thermal cut-out. If the temperature of any
of the heater modules gets too high, then the cut-out will trip and cut the power to that heater
module. If the cut-out operates, it must be reset by a qualified service person. This cut -out will only
trip in exceptional circumstances.
The AE115 unit is supplied from two independent voltage supplies and the AE125 unit from three
independent voltage supplies. The unit may continue to work if one of these supplies is switched off
or fails, but the temperature control will be poor. (In Canada the unit has just one voltage supply).
Depending on the region of the country, the temperature of the water supply can vary between 40°F
in winter to 70°F in summer, with an average of 55°F.
Diagram 4: Internal wiring schematic for single phase AE125 unit. (AE115 has two heater modules and
two supplies). (In Canada an auxiliary terminal block is fitted during installation).
For clarity
The positions of
term inals shown
here do not
correspond to
their positions on
L2C
the installer
terminal blocks
L2B
L2A
L1A
L1B
L1C
Electronic PCB

Specifications

Voltage supply
Amperage
Maximum output
Temperature control range
Pressure range
Minimum flow rate
Maximum flow rate
Dimensions (excl. water couplers)
Weight (without water)
Wiring Diagram for AE125, 3 x 240V supply. Pow erStar heater.
Flow
transducer
Temperature
adjustment
potentiometer
AE115 Unit
2 x 240V AC (Canada 240VAC)
2 x 40 A (Canada 80 A)
17.25 kW
95°F to 131°F
15 psi to 150 psi
0.6 US gal / min
See Graph 1, Page 8
15½" H x 15
20 lbs
CUTOUT
Brass inlet m anifold and Triac heat sink
1
/
" W x 4½" D
4
CUTOUT
CUTOUT
AE125 Unit
3 x 240V AC (Canada 240VAC)
3 x 40 A (Canada 120 A)
26.85kW
95°F to 131°F
15 psi to 150 psi
0.8 US gal / min
See Graph 1, Page 8
1
15½" H x 15
/
" W x 4½" D
4
22 lbs
9

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This manual is also suitable for:

Powerstar ae115