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ELECTRICAL REQUIREMENTS
CAUTION - Do not connect the brewer to the power source until specified in Initial Set-Up.
MODELS OT15 & 20 require 2-
wire, grounded service rated
120 volts ac, 15 or 20 amp re-
spectively, single phase, 60 Hz.
Model 15 has an attached
cordset.
NEUTRAL
WHITE
L1 BLACK
208 or 240V.A.C.
120V.A.C.
120V.A.C.
L2 RED
MODELS OT35 & RT35 require
3-wire, grounded service rated
120/208 or 120/240 volts ac, 20
amp, single phase, 60 Hz.
120V.A.C.
NEUTRAL
WHITE
L1 BLACK
Electrical Hook-Up
Model OT15 has an attached cordset.
Models OT20, OT35, & RT35, proceed as follows:
CAUTION – Improper electrical installation will dam-
age electronic components.
1. An electrician must provide electrical service as
specified.
2. Using a voltmeter, check the voltage and color
coding of each conductor at the electrical source.
3. Remove the front panel beneath the sprayhead
and rotate the control thermostat knob fully
counterclockwise to the "OFF" position and re-
place the panel.
4. Remove the rear panel, feed the cord through
the strain relief, and connect it to the terminal
block.
5. Connect the brewer to the power source and
verify the voltage at the terminal block before
proceeding. Replace the rear panel.
6. If plumbing is to be hooked-up later be sure the
brewer is disconnected from the power source.
If Plumbing has been hooked-up, the brewer is
ready for Initial Set-Up.
PLUMBING REQUIREMENTS
This brewer must be connected to a cold water
system with operating pressure between 20 and 90
psi from a 1/2" or larger supply line. A shut-off valve
should be installed in the line before the brewer. In-
stall a regulator in the line when pressure is greater
than 90 psi to reduce it to 50 psi. The water inlet
fitting is 1/4" flare.
NOTE - Bunn-O-Matic recommends 1/4" copper tub-
ing for installations of less than 25 feet and 3/8" for
more than 25 feet from the 1/2" water supply line. A
tight coil of copper tubing in the water line will facili-
tate moving the brewer to clean the counter top. Bunn-
O-Matic does not recommend the use of a saddle valve
to install the brewer. The size and shape of the hole
made in the supply line by this type of device may
restrict water flow.
This equipment must be installed to comply
with the Basic Plumbing Code of the Build-
ing Officials and Code Administrators Inter-
national, Inc. (BOCA) and the Food Service
Sanitation Manual of the Food and Drug Ad-
ministration (FDA).
MODELS OTA, RTA & RT35B
require 2-wire, grounded ser-
vice rated 240 volts ac or 200
volts ac, 20 amp single phase,
50 Hz.
MODEL RT requires 2-
wire, grounded service
rated 120 volt ac, 25 amp
single phase, 50 Hz.
200 OR 240V.A.C.
L1 BLACK
L2 RED
B
U
N
N
O
F
F
H
I
P1709
120V.A.C.
NEUTRAL
WHITE
L1 BLACK
32440 121699