Bunn U3/SRU - Manual (Page 4)

Page 4
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
GREEN GREEN
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.