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Page 5

GREEN

GREEN

ELECTRICAL REQUIREMENTS - U3, U3A, U333, U38, U3833

CAUTION - 

The brewer must be disconnected from the power source until specified in Initial Set-Up.

U333 & U3833 

 requires 3-wire, grounded service 

rated 240  volt  ac, 35 amp or 440 volts ac, 30 amp 

for U333,three phase, 60 Hz or 380 volts ac, 30 amp 

for U3833,  three phase, 50 Hz.

U3 &  U38 

requires 3-wire, grounded service rated 

120/208 or 120/240 volts ac, U3/SRU-30 amp,U38-40 

amp, single phase, 60 Hz.

U3A

 models require 2-wire, grounded service rated 

230 volts ac, 30 amp, single phase, 50 Hz.

U3833

 requires 4-wire, grounded service rated 380 

volts ac or 440 volts ac, 30 amp, three phase, 50 Hz.

GREEN

GREEN

L1, L2, L3, are the 3 phases

V1 = Phase to phase voltage,

 

between any 2 phases.

V2 = Phase to neutral voltage,

 

any phase to neutral.

 SYSTEM

VOLTAGE 

 V1 

 V2 

 208 

208  120 

 240 

240  139 

 380 

380  220

 440 

440  254

 

P1842

P1844

42769  041910

GREEN

GREEN

L2 RED

WHITE

NEUTRAL
L1 BLACK

120V A.C.

208 OR 

240V A.C.

RED

BLACK

BLUE

120V A.C.

208V OR 240V

380V OR 440V

208V OR 240V

380V OR 440V

208V OR 240V

380V OR 440V

P1841

P1843

L2

L3

L1

RED

BLACK

L1

L2

L3

N

WHITE

BLUE

(NEUTRAL)

U3A 

Requires 2-wire, gorunded service rated 230 

volts ac, 32 Amps, single phase, 50 Hz.

FACTORY WIRED

U3A 

Requires 4-wire, 3-phase grounded service 

rated 400 volts ac, 15 amp, 3 phase, 50 Hz.

FIELD WIRING

RED

BLACK

L1

L2

230V A.C.

ELECTRICAL REQUIREMENTS - U3A (UK)

CAUTION - 

The brewer must be disconnected from the power source until specified in Initial Set-Up.

Summary of Contents for SRU/U3

Page 1: ...19 2010 Bunn O Matic Corporation To ensure you have the latest revision of the Operating Manual Illustrated Parts Catalog Programming Manual or Service Manual please visit the Bunn O Matic website at...

Page 2: ...atements by such individuals whether oral or written do not constitute warranties and should not be relied upon If BUNN determines in its sole discretion that the equipment does not conform to the war...

Page 3: ...o reduce the risk of electric shock do not remove or open cover No user serviceable parts inside Authorized service personnel only Disconnect power before servicing WARNING Hot Water Use With Care WAR...

Page 4: ...d in applications such as farm houses Access to the service areas permitted by Authorized Service personnel only The A Weighted sound pressure level is below 70 dBA NORTH AMERICAN REQUIREMENTS This ap...

Page 5: ...50 Hz GREEN GREEN L1 L2 L3 are the 3 phases V1 Phase to phase voltage between any 2 phases V2 Phase to neutral voltage any phase to neutral SYSTEM VOLTAGE V1 V2 208 208 120 240 240 139 380 380 220 440...

Page 6: ...or Initial Setup SRUA CE Models require 2 wire grounded service rated 230 voltsac 30amp singlephase 50Hz P1842 SRU Models require 2 wire grounded service rated 208 or 240 volts ac 30 amp single phase...

Page 7: ...for brewing The recommended brewing temperature is approximately 200 F 93 C Water temperature may be increased by turning thermostat knob clockwise decreased by turning knob counterclockwise 7 When de...

Page 8: ...rs depending on the incoming water temperature Some water will flow from the overflow tube during this time due to expansion Draw off a 1 2 gallon of water every 15 minutes during the initial heat up...

Page 9: ...BREW switch until you see three breaks in the water stream from the swing arm and then release the switch Failure to release the switch within two seconds after the third break in the water stream ca...

Page 10: ...sight gauge cleaning brush into the sight gauge glass tube and clean 7 To clean coffee faucet s remove the faucet handle from the faucet and faucet clean out cap Clean faucet with a faucet cleaning br...

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