Electrical Requirements - U3 - Bunn SRU/U3 Installation & Operating Manual

ELECTRICAL REQUIREMENTS - U3, U3A, U333, U38, U3833
CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up.
L2 RED
WHITE
NEUTRAL
L1 BLACK
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.
BLACK
L1
RED
L2
GREEN
U3A models require 2-wire, grounded service rated
230 volts ac, 30 amp, single phase, 50 Hz.
CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up.
U3A Requires 2-wire, gorunded service rated 230
volts ac, 32 Amps, single phase, 50 Hz.
FACTORY WIRED
120V A.C.
208 OR
240V A.C.
120V A.C.
P1841
230V A.C.
GREEN
P1842
ELECTRICAL REQUIREMENTS - U3A (UK)
Page 5
RED
L2
BLUE
L3
BLACK
L1
GREEN
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.
WHITE
N
(NEUTRAL)
RED
L2
BLUE
L3
BLACK
L1
GREEN GREEN
P1844
U3833 requires 4-wire, grounded service rated 380
volts ac or 440 volts ac, 30 amp, three phase, 50 Hz.
U3A Requires 4-wire, 3-phase grounded service
rated 400 volts ac, 15 amp, 3 phase, 50 Hz.
FIELD WIRING
208V OR 240V
380V OR 440V
208V OR 240V
380V OR 440V
208V OR 240V
380V OR 440V
GREEN
P1843
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
42769 041910