Bosch Appliances manual Specifications, AE115 Unit AE125 Unit

•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

Wiring Diagram for AE125, 3 x 240V supply. PowerStar heater.

The positions of terminals shown here do not correspond to their positions on the installer terminal blocks

L2C

L2B

L2A

L1A

L1B

L1C

Flow transducer

CUTOUT

MODULE A

CUTOUT

MODULE B

Brass inlet manifold and Triac heat sink

CUTOUT

MODULE C

Thermistor

Electronic PCB

Temperature adjustment potentiometer

Specifications

	AE115 Unit	AE125 Unit
Voltage supply	2 x 240V AC (Canada 240VAC)	3 x 240V AC (Canada 240VAC)
Amperage	2 x 40 A (Canada 80 A)	3 x 40 A (Canada 120 A)
Maximum output	17.25 kW	26.85kW
Temperature control range	95°F to 131°F	95°F to 131°F
Pressure range	15 psi to 150 psi	15 psi to 150 psi
Minimum flow rate	0.6 US gal / min	0.8 US gal / min
Maximum flow rate	See Graph 1, Page 8	See Graph 1, Page 8
Dimensions (excl. water couplers)	15½” H x 151/4” W x 4½” D	15½” H x 151/4” W x 4½” D
Weight (without water)	20 lbs	22 lbs

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