Fetco CBS-51H10 User manual

FETCO®and LUXUS®are trademarks or trade names of Food Equipment Technologies Company.
© 2008 Food Equipment Technologies Company Part # P102 April 14, 2008
www.fetco.com User’s Guide
CBS-5000 Series Coffee Brewers
Table of Contents
Contact Information ........................................... 2
Introduction ........................................................ 2
Product Description/Features ............................ 2
Specifications..................................................... 2
Dimensions & Utility Connections...................... 4
Installation.......................................................... 6
Operating Procedures ....................................... 8
Service............................................................... 9
Brewer Parts .................................................... 14
Troubleshooting............................................... 22
Models:
 CBS-51H10
 CBS-51H15
 CBS-52H15
 CBS-52H20

2
Contact Information
FETCO®
Food Equipment Technologies Company
600 Rose Road
Lake Zurich •IL •60047-0429 •USA
Internet: www.fetco.com
Phone: [phone] (US & Canada)
[phone]
Fax: [phone]
Email: [email protected]
[email protected]
Introduction
This manual applies only to CBS-5000 Series brewers manufactured with solid state relays (SSR) in the heating
circuit. Earlier versions utilized mercury relays for heating. Refer to User’s Guide # P004 for mercury relay
versions.
The first digit of the serial number can be used to identify the version of a particular unit:
Serial number begins with 6– SSR version.
Serial number begins with 0 or 1 – mercury relay version.
Product Description/Features
CBS-51H10 - Single 1.0 Gallon Coffee Brewer CBS-52H15 - Twin 1.5 Gallon Coffee Brewer
CBS-51H15 -Single 1.5 Gallon Coffee Brewer CBS-52H20 - Twin 2.0 Gallon Coffee Brewer
• Thermal, portable, beverage dispensers Optional Features:
• Stainless steel, gourmet size brew baskets • Half batch brewing capability*
• Brew basket double safety locks • Iced tea brewing capability*
• Open type, leak free dispense system • Color stainless steel finish
• Fully automatic, with electronic temperature control • Export voltage
• Two level tank drain system • 3.0 liter airpots, with stands,
• Total serviceability from the front
* Can be added at any time.
Note: Throughout this manual, all references to CBS-51H and CBS-52H brewers apply to all models, unless otherwise indicated.
Specifications
Brew Volume: CBS-51H10 CBS-51H15 & 52H15 CBS-52H20 Temperature:
Full Batch 1 gal. (3.8 lit.) 1 ½ gal. (5.7 lit.) 2 gal. (7.6 lit.) 205°F inside water tank (at sea level)
Half Batch ½ gal. (1.9 lit.) ¾ gal. (2.8 lit.) 1 gal. (3.8 lit.) 195°F ±5°at sprayhead
Brew Time: CBS-51H10 CBS-51H15 & 52H15 CBS-52H20 Bypass Range: 0 to 33%
Full Batch 2 ¾ - 3 min. 4 - 4 ½ min. 5 ½ - 6 min. (factory set at 0% unless specified)
Half Batch 1 ½ min. 2 - 2 ¼ min. 2 ¾ - 3 min. (Not available on CBS-51H10)
(Allow an extra 2-4 minutes for coffee to finish dripping)
Coffee Filter Size: CBS-51H10 CBS-51H15, 52H15, & 52H20 Water Requirements: 20-75 psig
13” X 5” 15” X 5 ½ ” – standard
13” X 5” - optional half batch
½ gpm (CBS-51H)
1 ¼ gpm (CBS-52H)
Weights and Capacities
Brewer
Model
Weight
(empty)
Water tank
Capacity & Weight.
Weight
(filled)
Dispenser
Weight, ea.
Dispenser
Filled, ea..
Total Weight Brewer &
Dispensers, Filled
CBS-51H10 42 lbs. 3.0 gal. 25 lbs. 67 lbs. 7.0 lbs. 15.4 lbs. 82.4 lbs.
CBS-51H15 55 lbs. 3.7 gal. 31 lbs. 86 lbs. 8.5 lbs. 21 lbs. 107 lbs.
CBS-52H15 82 lbs. 7.6 gal. 63 lbs. 145 lbs. 8.5 lbs. 21 lbs. 187 lbs.
CBS-52H20 87 lbs. 7.6 gal. 63 lbs. 150 lbs. 10 lbs. 26.6 lbs. 203.2 lbs.

3
Electrical Configuration and Brewing Efficiency
CBS-51H10 1.0 gallon per batch
Electrical Heater Voltage Maximum Batches per Hour (max 13)
Config. Code Configuration Connection Phase Wires KW Amp draw Cold Water Hot Water
C50016 1 X 1800 watt 120 1 ph. 2+ground 1.9 15.84.5 10.3
C50026 2 X 1800 watt 120/208 1 ph. 3 + ground 3.1 13.5 6.7 13.0
120/220 1 ph. 3 + ground 3.4 14.7 7.8 13.0
120/240 1 ph. 3 + ground 4.1 15.5 8.9 13.0
CBS-51H15 1.5 gallons per batch
Electrical Heater Voltage Maximum Batches per Hour (max 11)
Config. Code Configuration Connection Phase Wires KW Amp draw Cold Water Hot Water
C51016 1 X 1800 watt 120 1 ph. 2 + ground 1.9 15.5 3.0 6.8
C51026 1 X 3000 watt 120/208 1 ph. 3 + ground 2.3 11.23.7 8.6
120/220 1 ph. 3 + ground 2.6 11.8 4.3 10.0
120/240 1 ph. 3 + ground 3.1 12.9 5.0 11.0
C51036 1 X 4000 watt 120/208 1 ph. 3 + ground 3.1 14.85.0 11.0
120/220 1 ph. 3 + ground 3.515.75.8 11.0
120/240 1 ph. 3 + ground 4.1 17.16.6 11.0
C51046 2 X 3000 watt 120/208 1 ph. 3 + ground 4.6 22.07.4 11.0
120/220 1 ph. 3 + ground 5.123.38.6 11.0
120/240 1 ph. 3 + ground 6.1 25.4 9.9 11.0
C51056 2 X 4000 watt 120/208* 1 ph. 3 + ground 6.1 29.3 9.9 11.0
*(-5) version is rated for 208 volts maximum
CBS-52H15 1.5 gallons per batch
Electrical Heater Voltage Maximum Batches per Hour (max 22)
Config. Code Configuration Connection Phase Wires KW Amp draw Cold Water Hot Water
C52016 2 X 3000 watt 120/208 1 ph. 3 + ground 4.6 22.07.4 17.2
120/220 1 ph. 3 + ground 5.123.38.6 19.9
120/240 1 ph. 3 + ground 6.1 25.49.9 22.0
C52026 2 X 4000 watt 120/208 1 ph. 3 + ground 6.1 29.39.9 22.0
120/220 1 ph. 3 + ground 6.8 30.9 11.5 22.0
120/240 1 ph. 3 + ground 8.1 33.8 13.2 22.0
C52036 3 X 3000 watt 120/208 3 ph. 4 + ground 7.0 19.411.2 22.0
120/220 3 ph. 4 + ground 7.820.512.9 22.0
120/240 3 ph. 4 + ground 9.1 22.4 14.9 22.0
C52046 3 X 4000 watt 120/208 3 ph. 4 + ground 9.225.614.9 22.0
120/220 3 ph. 4 + ground 10.3 27.117.3 22.0
120/240 3 ph. 4 + ground 12.1 29.619.8 22.0
C52186 3 X 4000 watt 480 3 ph. 3 + ground 12.1 14.8 19.8 22.0
C52986 STEAM 120 1 ph. 2 + ground n/a 0.8 22.0 22.0
maximum steam demand: 40 lbs./hour steam pressure: 10 – 15 PSI
CBS-52H20 2.0 gallons per batch
Electrical Heater Voltage Maximum Batches per Hour (max 18)
Config. Code Configuration Connection Phase Wires KW Amp draw Cold Water Hot Water
C53016 2 X 3000 watt 120/208 1 ph. 3 + ground 4.6 22.05.6 12.9
120/220 1 ph. 3 + ground 5.1 23.36.5 14.9
120/240 1 ph. 3 + ground 6.1 25.47.4 17.2
C53026 2 X 4000 watt 120/208 1 ph. 3 + ground 6.1 29.37.4 17.2
120/220 1 ph. 3 + ground 6.8 30.9 8.6 18.0
120/240 1 ph. 3 + ground 8.1 33.8 9.9 18.0
C53036 3 X 3000 watt 120/208 3 ph. 4 + ground 7.0 19.48.4 18.0
120/220 3 ph. 4 + ground 7.820.59.7 18.0
120/240 3 ph. 4 + ground 9.1 22.4 11.2 18.0
C53046 3 X 4000 watt 120/208 3 ph. 4 + ground 9.225.611.2 18.0
120/220 3 ph. 4 + ground 10.3 27.112.9 18.0
120/240 3 ph. 4 + ground 12.1 29.614.9 18.0
C53186 3 X 4000 watt 480 3 ph. 3 + ground 12.1 14.8 19.8 22.0
C53986 STEAM 120 1 ph. 2 + ground n/a 0.8 22.0 22.0
maximum steam demand: 40 lbs./hour steam pressure: 10 – 15 PSI

4
Dimensions & Utility Connections
CBS-51H10
CBS-51H15

5
CBS-52H15
CBS-52H20

6
Installation
(For Qualified Service Technicians Only)
Keys To A Successful Installation
If not installed correctly by qualified personnel, the brewer may not operate properly and damage may result.
Damages resulting from improper installation are not covered by the warranty.
Here are the key points to consider before installation:
Electrical:
 All FETCO brewers require NEUTRAL. Ground is not an acceptable substitute. Installation without neutral
may cause damage to the electronic components.
 The power connection to L2 on the terminal block must be at least 105 volts. Less than 105 volts will
cause erratic behavior from the brewer.
 The power switch has a built-in circuit breaker. To reset it, turn to the “off” position, and then back to the
“on” position.
 The electrical drawing for the brewer is located on the inside of the lower cover.
Plumbing:
 This equipment is to be installed to comply with the applicable federal, state, or local plumbing codes.
 The water line must be flushed thoroughly prior to connecting it to the brewer to prevent debris from
contaminating the machine.
 Verify that the water line will provide at least ½ gallons per minute for the CBS-51H, and 1 ¼ gallons per
minute for the CBS-52H before connecting it to the brewer.
General:
 Utilize only qualified beverage equipment service technicians for installation. A Service Company Directory
may be found on our web site, http://www.fetco.com.
Installation Instructions
Brewer Setup
1. Review the Dimensions for the unit you are installing. Verify that the brewer will fit in the space intended
for it, and that the counter or table will support the total weight of the brewer and dispensers when filled.
2. The brewer’s legs are shipped inside the brew baskets. Remove the brew basket(s) and the coffee
dispenser(s). Place the brewer on its back and screw in the legs.
3. Place the brewer on the counter or stand.
4. When the brewer is in position, level it front to back
and side to side by adjusting the legs.
5. Remove the lower cover to access the water and
electrical connections. Knock-outs are provided in the
back and base of the brewer body for the connections.
Water Connection
1. Water inlet is a 3/8 inch male flare fitting.
2. The brewer can be connected to a cold or hot water line. Cold water is preferred for best coffee flavor, but
hot water will allow for faster recovery times.
3. Install a water shut off valve near the brewer to facilitate service. If an in-line water filter is used, it should
be installed after the water shut off valve and in a position to facilitate filter replacement.
4. Flush the water supply line and filter before connecting it to the brewer.
5. Verify that the water line will provide at least ½ gallons per minute for the CBS-51H, and 1 ¼ gallons per
minute for the CBS-52H, and that the water pressure is between 20 and 75 psig.
6. Use a wrench on the factory fitting when connecting the incoming water line. This will reduce stress on the
internal connections and reduce the possibility of leaks developing after the install has been completed.
Warning: Legs are to be adjusted for
leveling the brewer only. Do not use
f or height adjustment or extend them
higher than necessary.

7
Electrical Connection
1. Verify that the actual voltage at the electrical service connection is compatible with the specifications on the
brewer’s serial number label. Make sure the electrical service includes neutral.
2. The temperature and water tank fill level are pre-set at the factory. There is no need to turn off the heaters
during the installation process. The control board disables the heaters until the tank is full of water. The
heating process will start automatically when the tank has filled.
3. Only 120VAC powered units are shipped from the factory with power cords and plugs attached. For other
voltages, a terminal block is provided for connecting the incoming power wires. Consult local codes to
determine if a cord and plug can be installed, or if the unit must be hard wired.
4. A fused disconnect switch or circuit breaker on the incoming power line must be conveniently located near
the brewer, and its location and markings known to the operators.
5. The body of the brewer must be grounded to a suitable building
ground. A ground lug is provided in the brewer next to the power
terminal block. Use only 10 gauge copper wire for grounding.
6. Electrical connections must be secured in-place within the unit to
meet national and local standards.
L1 L2 NGROUND LUG
GROUND
WIRE
SINGLE PHASE
TERMINAL BLOCK
N
208-240V
120V 120V
3 PHASE
TERMINAL BLOCK
GROUND LUG
GROUND
WIRE
L1 L2 L3 N
N
120V
208-240V 208-240V
208-240V
Electrical Configurations – US & Canada
7. Finally, connect the incoming power wires to the terminal block in accordance with applicable codes.
Final Setup
1. Turn on the incoming water supply line and inspect both inside and outside of the brewer for leaks in all
fittings and tubes
2. Turn on the incoming power.
3. Turn on the brewer’s main power switch.
4. Within 6 seconds, the hot water tank will begin filling until the probe at the top of the tank senses the water.
5. The control board will disable the heaters until the tank is full.
6. The brewer will be ready for operation as soon as the ready light comes on to signify that the water tank is
up to temperature. The time required to reach brewing temperature will vary according to the electrical
configuration ordered.
7. Review the Operating Instructions. Brew one full batch (water only) on each side to confirm proper fill
levels. The brewer is factory set with water only (no coffee) to dispense the correct amount of water.
8. Re-attach the covers after one final inspection for leaks. Look closely in the top of the brewer at the
dispense fittings during this inspection.
Operator Training
Review the operating procedures with whoever will be using the brewer. Pay particular attention to the following
areas:
1. Always pre-heat the dispensers before the first use of each day by filling them half way with hot water, and
letting them stand for at least 15 minutes.
2. Don't remove the brew basket until it has stopped dripping.
3. Make sure the dispenser is empty before brewing into it.
4. Show how to attach covers, close, and or secure the thermal dispensers for transporting.
5. Show the location and operation of the water shut off valve as well as the circuit breaker for the brewer.
6. Steam from the tank will form condensation in the vent tubes. This condensation will drip into and then out of
the brew baskets. 1/4 cup discharging overnight is possible. Place an appropriate container under each brew
basket when not in use.
7. We recommend leaving the power to the brewer on overnight. The water tank is well insulated and will use very
little electricity to keep the tank hot. Leaving the brewer in the on position will also avoid delays at the
beginning of shifts for the brewer to reach operating temperature.
Warning: To prevent
electrical shock, this
unit must be properly
grounded.

8
Operating Procedures
1. Turn brewer on/off switch (E)to the on position
• The power switch will illuminate to indicate that the brewer has power
and is operating.
• When the ready light (F) illuminates, the brewer is fully up to
temperature. The amount of time required to gain full operating
temperature will vary depending on the electrical configuration that
was ordered, and the temperature of the incoming water.
2. Pre-heat the dispensers.
This step is very important to the overall success of the brewing operation.
FETCO avoids the damaging affects of heat on fresh brewed coffee by using
highly insulated dispensers. The dispenser must be pre-heated with hot water
from the brewer. This preheating process ensures that the coffee in the first
brew starts out hot. Significant heat loss will occur when brewing coffee into a
cold dispenser. Preheating is not required for subsequent brews unless the
dispenser remains empty for an extended period of time and has cooled down.
• Slide the empty brew basket(s) (D) into their rails and put the empty
dispenser(s) in position under the basket for preheating. Select the
half batch mode, (A) if you have this option.
• When the ready light illuminates, start a brew cycle by rotating the brew
lever (B) to the brew position. This starts clean hot water flowing into
the brew basket and then into the dispenser.
• Stop the cycle when each dispenser is approximately 1/2 full by moving
the brew lever to the off position. This interrupts the brew cycle and
resets the brewer.
• Let the dispensers stand 10-15 minutes, or until use, to allow the heat
from the water to be absorbed by the dispensers.
3. Remove the brew baskets from the brewer when you are certain that the flow of hot water has stopped
from the bottom of the basket.
• H model brewers will have a safety bar (C) in front of the brew basket to make removing the brew
basket a 2-handed operation. This was done to help draw attention to the basket so the operator will
notice any residual hot water or coffee.
• Place a paper filter in each basket to be used. Pour into the paper filter the appropriate amount of pre-
measured, ground coffee. The amount of coffee used will depend on your personal tastes and the
recommendation of your roaster.
• Slide the brew basket back into the rails on the brewer. Insure the latch is outside of the basket.
4. Carefully drain any coffee or preheating water from the dispensers through the faucets before starting
a coffee brewing cycle.
• Overflowing of the dispensers may result if the dispensers are not completely empty when the brew
cycle begins. Verify by opening the faucet over an appropriate container or drain. The last several
cups cannot be seen in the sight gauge tube.
• CAUTION: both the coffee or water may still be hot enough to cause burns, so be careful when
draining the dispensers
5. Place the thermal dispenser(s) in position under the brew baskets.
• Ensure that the brew funnel is in place, the dispenser is empty, and the faucet is closed. If you are
using TPD-1.5 dispensers, also make sure the vent cap on the sight gauge is open.
• The twist lock cover (TPD-1.5 dispensers) is for transporting the dispenser only. It must be removed
before placing the dispenser under the brew basket.
6. Start the brew cycle in the same manner used to start the water used to preheat the dispensers.
• It will not be necessary to interrupt the cycle while brewing coffee. The brewer will return to the
stopped and ready status automatically.
• It is normal for the ready light to go out after the start of the brew cycle. On twin brewers, there is
enough hot water in the brewer to support a second brew, even if the ready light is off. After brewing
on both sides, you must wait for the ready light to come back on.
• The electrical configuration and the electrical power connected to the brewer will determine how long
before the ready light comes back on for the next brew.
(Continued on next page)
BREW
STOP
POWER
READY
GCA
B
H
DE
F
Legend:
A-Full/half batch switch
B-Brew lever
C-Safety bar
D-Brew basket
E-On/off switch
F-Ready light
G- Brew light
H- Hot water faucet

9
CAUTION
• Do not remove the brew basket immediately after the brew cycle has finished. Wait until
dripping from the bottom of the brew basket has stopped. Carefully remove the brew basket
while inspecting the inside of the basket for hot coffee that may have been trapped or has not
finished draining.
Service
Warranty
All FETCO brewers come with a limited warranty. All warranty service must be pre-authorized by calling the
FETCO Service Department at [phone].
Principles of Operation
Fill System
The fill system consists of a liquid level control board, a water level probe at the top of the tank, a fill valve, and a fill
tube. As the water rises and touches the probe, continuity is established between the probe tip and the tank body,
and the fill valve closes.
When water is dispensed, the water level drops below the probe. After a 5 second delay, the fill valve opens until
the water touches the probe again.
The 5 second delay, and the speed that water refills the tank during brewing, results in many short bursts of water.
The sound made by these repetitive bursts will let you know the fill system is functioning normally.
The fill system is designed to protect the heaters during both the installation and a loss of the water supply. During
initial installation, or whenever the power switch is turned on, voltage will not be supplied to the thermostat until the
tank fills and water touches the water level probe.
During operation, when water is dispensed and the water level drops below the probe, a fill signal is sent to the fill
valve. If the probe senses no water after 40 seconds, the voltage to the thermostat and the heaters is removed.
Water enters the tank through the fill tube. A hole is drilled in the upper portion of the fill tube to prevent water from
being siphoned from the tank. The fill tube extends to the bottom area of the tank. This introduces cold incoming
water directly to the heaters and away from the dispense assembly.
The water tank can be drained through a valve located inside the lower compartment of the brewer.
Temperature System:
The temperature system consists of an electronic thermostat, a temperature probe, solid state relays (SSR), and
heating elements, and is enabled by the liquid level control board. (See the previous section - Fill Circuit.)
When the water level probe is in contact with water, power is delivered to the thermostat through the liquid level
control board. If the temperature probe senses that the water is not hot enough, the thermostat energizes the
heating elements through the solid state relay (SSR), the water is heated, and the ready light goes off.
Once the water temperature reaches the set point, the thermostat disengages power to the heaters and the ready
light illuminates.
The thermostat is adjusted to 205°F ±2°at the factory. (Slightly lower for high altitude installations.)

10
Timing System:
The timing system consist of the timer and the dispense latch assembly.
When the brew handle is rotated from the stop to the brew position, it pushes the plunger in the latch coil and
closes the micro switch, and the timer starts the timed cycle. It also starts the hot water flowing.
The timer energizes the dispense latch coil, which acts as a magnet, to hold the brew handle in the brew position.
It also lights the brew light. The coil remains energized throughout the brew cycle timed sequence.
When the timer finishes its cycle, it removes voltage from the latch coil. The latch coil then releases the brew
handle, a spring returns it to the stop position, and the flow of water stops. This return opens the micro switch,
stopping voltage from going to the timer. The brew light and the timer are disabled, and wait for the brew handle to
engage the next brew cycle.
Dispense System:
The dispense system is completely mechanical. It is one of the areas that makes FETCO's brewer truly unique.
(See the illustration in this section.)
When you rotate the brew lever down to brew, the end of the dispense tube is submerged in the hot water tank. It
is held in the brew position by the magnetic action of the dispense latch coil.
The brew water travels down the dispense tube to the sprayhead assembly. The flow disc above the spray cutter
controls the rate of flow over the coffee. The standard hole in the flow disc is .240”, except for the CBS-51H10,
which is .219”. Other flow discs are available for special situations like high levels of by-pass.
The sprayhead can be assembled incorrectly during cleaning. Refer to the cleaning label on the brewer for proper
assembly. The flow disc has the flange down, flat side up. The six triangle spray cutter has the flange up. The
eight hole spray cutter used in place of the triangle cutter goes bumps down.
A bypass valve and tube are connected to the sprayhead. This valve directs brew water around the outside edge of
the filter paper. The by-pass valve is shipped in the closed position from the factory. Each time the valve is
adjusted, the brew volume is affected. Adjustment of the by-pass valve is for flavor only.
When the timer circuit releases the brew latch, the dispense tube pops back above the hot water level. The
remaining brew water drains from the dispense system leaving it free of standing water. Steam escaping from the
brew tank through this tube inhibits the formation of lime in the brew system.
The dispense system is clean & semi dry for all but the brief time required for the brew cycle. This eliminates any
chance of lime build-up affecting the brew cycle.
It is very easy to dislodge the dispense tube seals while servicing the dispense system. If you see it leaking
profusely, remove the nut and dispense tube. Reset the seal fully into the recess and carefully insert the dispense
tube. Then secure the locknut before you back the tube into position. (See detailed instructions on page 10.)

11
Mechanical Illustration - Dispense System
STOP
BREW
SIDE (SECTION) VIEW
FRONT VIEW
BREW BASKET
CONTROL PANEL
HOT WATER TANK
DISPENSE TUBE
SPRAY HEAD
BY-PASS TUBE
FLOW DISC
SPRAY CUTTER
LOCKNUT
BY-PASS VALVE
DISPENSE LATCH ASSEMBLY:
SOLENOID ASSY, PUSH ROD, MICROSWITCH,
SOLENOID LATCH PLATE ASSY WATER LEVEL PROBE
BREW START/STOP HANDLE
BREW START/STOP
HANDLE RETURN
SPRING
DISPENSE FITTING ASSY:
DISPENSE FITTING
DISPENSE FITTING LOCKNUT
SEAL
SEAL LOCKNUT
TEFLON SEAL
SEAL LOCKNUT
TEFLON SEAL
SPRAY HEAD
DRIVE SCREW
DISPENSE TUBE SHAFT
DISPENSE TUBE
To remove the dispense tube:
1. Unscrew seal locknut and
release the drive screw from
dispense tube shaft.
2. Turn the dispense tube
slightly back and forth, while
pushing the tube into the hot
water tank until it is free from
the sprayhead.
Pull the dispense tube out of
the tank. Remember the tube
is bent inside the tank. The
seal will come out with the
tube.
To install the dispense tube:
1. Clean any lime build up off
the tube and then slide the seal
off. Push the seal carefully
into its chamber in the
f
ittin
g
.
(
s
p
rin
g
towards the hot
water tank.)
2. Place the seal locknut onto
the tube and slide the tube into
the seal. Tighten the seal
locknut.
3. Work the tube back into
the sprayhead seal.
4. Join the dispense tube
shaft and the brew handle
shaft with the drive screw.

12
Adjustments
Thermostat Adjustment:
During normal operation, the digital readout displays the last two digits of the actual water temperature. When the
adjustment tool is turned, the readout begins flashing to indicate the set point, not the actual temperature. After the
tool is released, the readout stops flashing and displays the actual temperature again.
A red LED lights when the power to the thermostat is on. A yellow LED lights when the thermostat is calling for
heat.
To adjust, turn the adjustment tool. If no adjustment tool is present, a small flat-head screwdriver may be used. The
display will flash, indicating that the display is showing the set point, not the actual temperature.
The dots below the numbers indicate the temp range.
0 dots – less than 100° F
1 dot – between 100° and 200° F
2 dots – over 200° F
Examples:
7 5 = 75°F
8 7 = 187°F
0 3 = 203°F
Timer Adjustment:
The timer has two independent settings, with three dials for each setting. The first dial in each group sets 100
second increments, the second dial sets 10 second increments, and the third dial sets 1 second increments.
A red LED lights when the power to the timer is on. A yellow LED lights when the timer is running.
A small flat head screwdriver is required to adjust the dials.
part # K034, digital timer, 100-120 VAC
part # K036, digital timer, 200-240 VAC (export versions only)

13
Water Level Control Board
The board features a jumper to adjust its’ sensitivity for reverse osmosis or other types of ultra-pure water.
The default jumper setting is LO (50K ohms) for normal water. If the brewer tank overfills because of ultra-
pure water, the jumper should be set to HI (100K ohms).
A red LED lights when the power to the board is on.
A green LED lights when the water level probe detects that the tank is full.
A yellow LED lights when the FILL circuit is energized.
A second yellow LED lights when the HEAT circuit is energized.
Bypass Adjustment: (Not available on CBS-51H10)
The purpose of the bypass valve is to allow a portion of the brewing water to flow between the brew basket and the
wire insert, directly into the server, without coming in contact with the coffee grounds. The bypass can be adjusted
from 0% to 33% of the total brewing water. Dual brewers (CBS-52H), have separate bypass valves on each side.
Unless requested at the time of order, all brewers are shipped with the bypass valves closed (0%). Adjusting the
bypass always changes the total brew volume, so the timer setting must always be checked and adjusted.
To adjust the bypass:
• Remove the brewer’s upper cover.
• The bypass valve is located above the brew basket, to the right and to the front, as you are facing
it.
• Remove the brew basket.
• Place a container under the spray head, and a separate container under the bypass hole.
• Turn the bypass valve clockwise to decrease, and counter-clockwise to increase the bypass
amount. A good starting point would be one full turn for each 5% change.
• Brew a full cycle and measure the amount of water in both containers.
• The ratio of the bypass water to the total in both containers is the bypass percentage.
example: ½ gal. bypass + 1 gal. from spray head = 1 ½ gal. total. Bypass = 33.3%.
• Several adjustments may be necessary until the desired results are achieved.

14
Brewer Parts
Parts drawings for models CBS-51H10 and CBS-52H20 were not available at the time of
publication. Listed below are the major components for these models.
CBS-51H10 PART # DESCRIPTION
K033 DIGITAL THERMOSTAT KIT, 100-120VAC
K035 DIGITAL THERMOSTAT KIT, 200-240VAC (EXPORT) EXPORT ONLY
K034 DIGITAL TIMER KIT, 100-120VAC
K036 DIGITAL TIMER KIT, 200-240VAC EXPORT ONLY
108034 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 100-120 VAC, 50-100K ohm
108035 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 200-240 VAC, 50-100K ohm EXPORT ONLY
57006 VALVE, S-53 120VAC
57017 VALVE, S-53 240VAC EXPORT ONLY
52077 BREAKER,CIRCUIT 120VAC ROCKER SWITCH 6 AMP
52076 BREAKER,CIRCUIT 220VAC ROCKER SWITCH 6 AMP EXPORT ONLY
102008 ASSEMBLY, DISPENSE SOLENOID LATCH, 120 VAC
102039 ASSEMBLY, DISPENSE SOLENOID LATCH, 220 VAC EXPORT ONLY
58027 LAMP, READY INDICATOR, GREEN 120VAC
58006 LAMP, READY INDICATOR, GREEN 220VAC EXPORT ONLY
58026 LAMP, BREW 120VAC
58004 LAMP, BREW 220VAC EXPORT ONLY
71021 FAUCET HPSC-BR-8 REGULAR HANDLE, (COMPLETE FAUCET)
71039 FAUCET, UPPER ASSY. (SUBCOMPONENT OF #71021)
71003 FAUCET SEAT CUP (SUBCOMPONENT OF #71021)
24008 SEAL, DISPENSE TUBE, 7/16"DIA
002049 WELDMENT DISPENSER TUBE
85004 SPRING, BREW HANDLE RETURN
05017 SPRAY CUTTER FLOW DISK, 0.219 DIA. HOLE
05001 SPRAY CUTTER, 6 HOLE
31015 LOCKNUT, SPRAY CUTTER
102360 SWITCH, SLIDE, FULL/HALF BATCH SELECTOR, W/ HARNESS
101010 ASSEMBLY, BREW BASKET, 13 X 5
09001 BREW BASKET WIRE INSERT, 13 X 5 (SUBCOMPONENT OF 101010)
CBS-52H20 PART # DESCRIPTION
K033 DIGITAL THERMOSTAT KIT, 100-120VAC
K035 DIGITAL THERMOSTAT KIT, 200-240VAC (EXPORT) EXPORT ONLY
K034 DIGITAL TIMER KIT, 100-120VAC
K036 DIGITAL TIMER KIT, 200-240VAC EXPORT ONLY
108034 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 100-120 VAC, 50-100K ohm
108035 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 200-240 VAC, 50-100K ohm EXPORT ONLY
102323 VALVE, S-45 120VAC
57022 VALVE, S-45 240VAC EXPORT ONLY
52077 BREAKER,CIRCUIT 120VAC ROCKER SWITCH 6 AMP
52076 BREAKER,CIRCUIT 220VAC ROCKER SWITCH 6 AMP EXPORT ONLY
102008 ASSEMBLY, DISPENSE SOLENOID LATCH, 120 VAC
102039 ASSEMBLY, DISPENSE SOLENOID LATCH, 220 VAC EXPORT ONLY
58027 LAMP, READY INDICATOR, GREEN 120VAC
58006 LAMP, READY INDICATOR, GREEN 220VAC EXPORT ONLY
58026 LAMP, BREW 120VAC
58004 LAMP, BREW 220VAC EXPORT ONLY
71021 FAUCET HPSC-BR-8 REGULAR HANDLE, (COMPLETE FAUCET)
71039 FAUCET, UPPER ASSY. (SUBCOMPONENT OF #71021)
71003 FAUCET SEAT CUP (SUBCOMPONENT OF #71021)
24008 SEAL, DISPENSE TUBE, 7/16"DIA
002033 WELDMENT DISPENSER TUBE CBS-50's
85004 SPRING, BREW HANDLE RETURN
05002 DISK, FLOW, SPRAY CUTTER, .240 DIA
05014 SPRAY CUTTER
31015 LOCKNUT, SPRAY CUTTER
102360 SWITCH, SLIDE, FULL/HALF BATCH SELECTOR, W/ HARNESS
101165 ASSEMBLY, BREW BASKET, 16" X 6", DIA HOLE 0.280" (SEE FIG. 5)

15
Figure 1 – CBS-51H15 Main Assembly

16
ITEM # QTY PART # DESCRIPTION
1 1 001009 WELDMENT CBS-51H
2 1 102323 VALVE, S-45 120VAC
2 1 57022 VALVE, S-45 240VAC EXPORT ONLY
3 1 65002 CONNECTOR, COPPER LUG
4 1 52001 TRACK, TERMINAL BLOCK
5 3 52048 TERMINAL BLOCK
6 5 86021 BUSHING, SNAP, 1.375 MTG HOLE
7 1 86002 PLUG, DOME, .875 MOUNTING HOLE
1 71021 FAUCET HPSC-BR-8 REGULAR HANDLE (COMPLETE FAUCET)
1 71039 FAUCET, UPPER ASSY. (SUBCOMPONENT OF #8)
8
1 71003 FAUCET SEAT CUP (SUBCOMPONENT OF #8)
9 1 45014 CBS-52H OVERLAY ARTWORK
10 1 52077 BREAKER,CIRCUIT 120VAC ROCKER SWITCH 6 AMP
10 1 52076 BREAKER,CIRCUIT 220VAC ROCKER SWITCH 6 AMP EXPORT ONLY
11 1 45016 NAMEPLATE; OVERLAY
12 1 58027 LAMP, READY INDICATOR, GREEN 120VAC
12 1 58006 LAMP, READY INDICATOR, GREEN 220VAC EXPORT ONLY
13 1 31070 FITTING, HOSE BARB TO MALE PIPE 5/16"
14 1 102008 ASSEMBLY, DISPENSE SOLENOID LATCH, 120 VAC
14 1 102039 ASSEMBLY, DISPENSE SOLENOID LATCH, 220 VAC EXPORT ONLY
15 1 83041 WASHER, .812"OD X .412"ID, FLAT
16 1 102028 ASSEMBLY, BYPASS, CBS-60'S, 50'S
17 1 31116 LOCKNUT 1/8"-27 NPT
18 1 25001 TUBE, BY-PASS SILICONE, 1/4 X 7/16 X 2-7/8"
19 1 K033 DIGITAL THERMOSTAT KIT, 100-120VAC
19 1 K035 DIGITAL THERMOSTAT KIT, 200-240VAC (EXPORT) EXPORT ONLY
20 10 82053 SCREW, # 6-32 X 1/2" TRUSS HD PH
21 1 002244 WELDMENT, TIMER PLASTIC TRACK, CBS-60'S, 2"LG
22 1 K034 DIGITAL TIMER KIT, 100-120VAC
22 1 K036 DIGITAL TIMER KIT, 200-240VAC EXPORT ONLY
23 4 73011 LEG, FLANGE FOOT, 4" HIGH
24 1 31023 FITTING, COMPR., CONNECTOR, 3/8 TUBE OD X 1/4 FPT
25 1 108034 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 100-120 VAC, 50-100K ohm
25 1 108035 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 200-240 VAC, 50-100K ohm EXPORT ONLY
26 3 83011 WASHER, #6 SCREW SIZE, INTERNAL
27 3 84001 NUT, HEX, #6-32 MACHINE SCREW
28 9 83026 WASHER, INTERNAL TOOTH LOCK, #8 SCREW SIZE
29 9 84002 NUT, HEX, #8-32 MACHINE SCREW
30 1 86013 PLUG STEEL 7/16" ID, 21/32" HEAD DIAMETER
31 1 * ASSEMBLY TANK, CBS-51H-15, SSR
32 1 31068 SPRAY HEAD, 1.5 GAL MACHINES
33 1 33002 LOCKNUT, SPRAY HEAD
34 1 32034 TUBE (FILL VALVE TO TANK WATER INLET CONNECTING)
35 1 24008 SEAL, DISPENSE TUBE, 7/16"DIA
36 1 002033 WELDMENT DISPENSER TUBE CBS-50's
37 1 102010 ASSEMBLY, DISPENSE HANDLE
38 1 102022 ASSEMBLY, DISPENSE LATCH, CBS-50'S
39 1 85004 SPRING, BREW HANDLE RETURN
40 1 82018 SCREW, 8-32 X 2-1/4" LG
41 1 82004 SCREW, 6-32 X 5/8" RND HEAD PHILLIPS
42 1 32033 TUBE (TANK TO HOT WATER FAUCET CONNECTING)
43 1 05002 DISK, FLOW, SPRAY CUTTER, .240 DIA
44 1 05014 SPRAY CUTTER
45 1 31015 LOCKNUT, SPRAY CUTTER
46 1 44004 LABEL GROUND
47 1 102360 SWITCH, SLIDE, FULL/HALF BATCH SELECTOR, W/ HARNESS
48 1 44024 LABEL, WARNING-HIGH VOLTAGE
49 8 84050 NUT, CLIP ON (J-NUT), #6-32, 22 - 20 GA., BLACK-PHOSPHATE FINISH
50 1 002023 WELDMENT, LOWER COVER CBS-50'S
51 1 * WIRING DIAGRAM CBS-51H-15
52 1 01133 COVER, UPPER CBS-51H
53 1 25021 TUBING, SILICONE (VENT), 1/4"ID X 3/8"OD X 6-1/2"LG
54 1 25046 TUBE, 5/8"OD X 3/8"ID X 15"LG, DRAIN
55 1 86038 CLAMP, HOSE, .670"-.780" DIA RANGE
56 1 86001 BUSHING, .312 X .500" HEAD DIA. SHORTY
57 1 58026 LAMP, BREW 120VAC
57 1 58004 LAMP, BREW 220VAC EXPORT ONLY
58 1 101165 ASSEMBLY, BREW BASKET, 16" X 6", DIA HOLE 0.280" (SEE FIG. 5)
* For tank assembly and wiring diagram part numbers, call Tech Support at 800-338-2699. Provide the brewer serial number when calling.

17
Figure 2 – CBS-51H15 Tank Assembly
ITEM # QTY PART # DESCRIPTION
1 1 004072 WELDMENT, TANK, CBS-51H-15, SRR
2 2 31021 BUSHING, 3/4-16 X 1/4 NPSM, HEX HEAD
3 1 84007 NUT, 3/4-16 HEX JAM
4 1 31082 FITTING, HEX NIPPLE, 3/8 MPT X 1/4 MPT
5 1 34004 VALVE, BALL 3/8 FPT X 3/8 FPT
6 1 31054 FITTING, 1/2 HOSE ID X 3/8 MPT
7 1 31116 LOCKNUT 1/8"-27 NPT
8 1 83041 WASHER, .812"OD X .412"ID, FLAT
9 1 31005 FITTING, 90 DEG. ELBOW, 1/4 HOSE ID X 1/8 MPT
10 1 33006 FITTING, TANK, (7/16 DIA DISPENSE TUBE)
11 1 33007 LOCKNUT, 7/16 STRAIGHT PIPE THREAD
12 1 24008 SEAL, DISPENSE TUBE, 7/16"DIA
13 1 31052 LOCKNUT, 7/16", DISPENSE TUBE SEAL, KEEPER
14 2 31118 LOCKNUT 3/8"-18 NPT
15 1 31055 FITTING, FILL VALVE INLET
16 1 23249 LOCKNUT 1/4"-18 NPT MODIFIED THREAD
17 1 83042 WASHER, .875"OD X .562"ID, FLAT
18 1 25098 FITTING, COMPRESSION MALE CONNECTOR
19 1 31027 FITTING, COMPR 90 MALE ELBOW, 3/8 TUBE OD X 1/4 MPT
20 1 24002 O-RING, TANK COVER
21 1 102013 ASSEMBLY, TANK COVER
22 1 or 2 107002 ASSEMBLY, IMMERSION HEATER, 3000W, 240VAC
22 1 or 2 107003 ASSEMBLY, IMMERSION HEATER, 4000W, 240VAC
22 1 or 2 107005 ASSEMBLY, IMMERSION HEATER, 1800W, 120VAC
23 1 03443 ALUMINUM BRACKET FOR SSR
24 1 108071 ASSEMBLY, RELAY, SOLID STATE, 50 A/ 600V
25 2 15013 STANDOFF, 6-32 x1.25 LG.,1/4 HEX WIDTH
26 1 03332 BRACKET 2, ONE SHOT THERMOSTAT
27 1 53088 THERMOSTAT, SINGLE SHOT, 240V/40A
28 2 83011 WASHER, #6 SCREW SIZE, INTERNAL
29 2 84045 NUT, HEX 6-32, UNDERSIZED
30 1 K065 ASSEMBLY, DIGITAL TEMP. PROBE, 14.0"LG W/34" CABLE
31 1 21026 HOUSING, WATER LEVEL PROBE 0.140" DIA.
32 1 002010 WELDMENT, WATER LEVEL PROBE, 1.75" LG
For tank assembly and wiring diagram part numbers, call Tech Support at 800-338-2699. Provide the brewer serial number when calling.

18
Figure 3 – CBS-52H15 Main Assembly
ITEM # QTY PART # DESCRIPTION
1 1 001008 WELDMENT CBS-52H15
2 1 102323 VALVE, S-45 120VAC
2 1 57022 VALVE, S-45 240VAC EXPORT ONLY
3 1 65002 CONNECTOR, COPPER LUG
4 1 52001 TRACK, TERMINAL BLOCK
5 4 52048 TERMINAL BLOCK
6 6 86021 BUSHING, SNAP, 1.375 MTG HOLE
1 71021 FAUCET HPSC-BR-8 REGULAR HANDLE (COMPLETE FAUCET)
1 71039 FAUCET, UPPER ASSY. (SUBCOMPONENT OF #7)
7
1 71003 FAUCET SEAT CUP (SUBCOMPONENT OF #7)
8 1 45014 CBS-52H OVERLAY ARTWORK
9 1 52077 BREAKER,CIRCUIT 120VAC ROCKER SWITCH 6 AMP
9 1 52076 BREAKER,CIRCUIT 220VAC ROCKER SWITCH 6 AMP EXPORT ONLY
10 1 45055 NAMEPLATE; OVERLAY

19
11 1 58027 LAMP, READY INDICATOR, GREEN 120VAC
11 1 58006 LAMP, READY INDICATOR, GREEN 220VAC EXPORT ONLY
12 2 58026 LAMP, BREW 120VAC
12 2 58004 LAMP, BREW 220VAC EXPORT ONLY
13 2 31068 SPRAY HEAD, 1.5 GAL MACHINES
14 2 24008 SEAL, DISPENSE TUBE, 7/16"DIA
15 2 31070 FITTING, HOSE BARB TO MALE PIPE 5/16"
16 2 002033 WELDMENT DISPENSER TUBE CBS-50's
17 2 102010 ASSEMBLY, DISPENSE HANDLE
18 2 82018 SCREW, 8-32 X 2-1/4" LG
19 2 86001 BUSHING, .312 X .500" HEAD DIA. SHORTY
20 1 102008 ASSEMBLY, DISPENSE SOLENOID LATCH, 120 VAC
20 1 102039 ASSEMBLY, DISPENSE SOLENOID LATCH, 220 VAC EXPORT ONLY
21 2 83041 WASHER, .812"OD X .412"ID, FLAT
22 2 102028 ASSEMBLY, BYPASS, CBS-60'S, 50'S
23 2 31116 LOCKNUT 1/8"-27 NPT
24 2 33002 LOCKNUT, SPRAY HEAD
25 2 102022 ASSEMBLY, DISPENSE LATCH, CBS-50'S
26 2 85004 SPRING, BREW HANDLE RETURN
27 2 82004 SCREW, 6-32 X 5/8" RND HEAD PHILLIPS
28 2 05002 DISK, FLOW, SPRAY CUTTER, .240 DIA
29 2 05014 SPRAY CUTTER
30 2 31015 LOCKNUT, SPRAY CUTTER
31 2 25001 TUBE, BY-PASS SILICONE, 1/4 X 7/16 X 2-7/8"
32 3 002244 WELDMENT, TIMER PLASTIC TRACK, CBS-60'S, 2"LG
33 2 K034 DIGITAL TIMER KIT, 100-120VAC
33 2 K036 DIGITAL TIMER KIT, 200-240VAC EXPORT ONLY
34 3 73011 LEG, FLANGE FOOT, 4" HIGH
35 1 31023 FITTING, COMPR., CONNECTOR, 3/8 TUBE OD X 1/4 FPT
36 1 108034 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 100-120 VAC, 50-100K ohm
36 1 108035 ASSEMBLY, BOARD, WATER LEVEL, CONTROL, 200-240 VAC, 50-100K ohm EXPORT ONLY
37 11 83026 WASHER, INTERNAL TOOTH LOCK, #8 SCREW SIZE
38 11 84002 NUT, HEX, #8-32 MACHINE SCREW
39 1 44004 LABEL GROUND
40 1 * ASSEMBLY, TANK CBS-52H-15, SSR
41 1 32031 TUBE (FILL VALVE TO TANK WATER INLET CONNECTING)
42 1 K033 DIGITAL THERMOSTAT KIT, 100-120VAC
42 1 K035 DIGITAL THERMOSTAT KIT, 200-240VAC (EXPORT) EXPORT ONLY
43 1 002023 WELDMENT, LOWER COVER CBS-50'S
44 1 01056 COVER, UPPER CBS-52H
45 2 101165 ASSEMBLY, BREW BASKET, 16" X 6", DIA HOLE 0.280" (SEE FIG. 5)
46 6 84051 NUT, CLIP ON (J-NUT), #6-32, 18 -16 GA., BLACK-PHOSPHATE FINISH
47 4 84050 NUT, CLIP ON (J-NUT), #6-32, 22 - 20 GA., BLACK-PHOSPHATE FINISH
48 2 86013 PLUG STEEL 7/16" ID, 21/32" HEAD DIAMETER
49 12 82053 SCREW, # 6-32 X 1/2" TRUSS HD PH
50 1 25046 TUBE, 5/8"OD X 3/8"ID X 15"LG, DRAIN
51 1 86038 CLAMP, HOSE, .670"-.780" DIA RANGE
52 1 32032 TUBE (TANK TO HOT WATER FAUCET CONNECTING)
53 1 25021 TUBING, SILICONE (VENT), 1/4"ID X 3/8"OD X 6-1/2"LG
54 1 44024 LABEL, WARNING-HIGH VOLTAGE
55 2 102360 SWITCH, SLIDE, FULL/HALF BATCH SELECTOR, W/ HARNESS
* For tank assembly and wiring diagram part numbers, call Tech Support at 800-338-2699. Provide the brewer serial number when calling.

20
Figure 4 – CBS-52H15 Tank Assembly
ITEM # QTY PART # DESCRIPTION
1 1 004073 WELDMENT, TANK, CBS-52H-15, SRR
2 3 84007 NUT, 3/4-16 HEX JAM
3 2 31021 BUSHING, 3/4-16 X 1/4 NPSM, HEX HEAD
4 1 31082 FITTING, HEX NIPPLE, 3/8 MPT X 1/4 MPT
5 1 34004 VALVE, BALL 3/8 FPT X 3/8 FPT
6 1 31054 FITTING, 1/2 HOSE ID X 3/8 MPT
7 1 31027 FITTING, COMPRESION, 90 DEG, MALE ELBOW
8 3 03332 BRACKET 2, ONE SHOT THERMOSTAT
9 3 53071 THERMOSTAT, SINGLE SHOT, 25A
10 2 33007 LOCKNUT, 7/16 STRAIGHT PIPE THREAD
11 2 33006 FITTING, TANK, (7/16 DIA DISPENSE TUBE)
12 2 24008 SEAL, DISPENSE TUBE, 7/16"DIA
13 2 31052 LOCKNUT, 7/16", DISPENSE TUBE SEAL, KEEPER
14 2 31118 LOCKNUT 3/8"-18 NPT
15 1 31028 FITTING, COMPR. MALE CONNECTOR 3/8 TUBE OD X 3/8 MPT
16 1 31116 LOCKNUT 1/8"-27 NPT
17 1 83041 WASHER, .812"OD X .412"ID, FLAT
18 1 31005 FITTING, 90 DEG. ELBOW, 1/4 HOSE ID X 1/8 MPT
19 1 83042 WASHER, .875"OD X .562"ID, FLAT
20 1 25098 FITTING, COMPRESSION MALE CONNECTOR
21 1 23249 LOCKNUT 1/4"-18 NPT MODIFIED THREAD
22 1 24002 O-RING, TANK COVER
23 1 102013 ASSEMBLY, TANK COVER
24 2 or 3 107002 ASSEMBLY, IMMERSION HEATER, 3000W, 240VAC
24 2 or 3 107003 ASSEMBLY, IMMERSION HEATER, 4000W, 240VAC
25 6 83011 WASHER, #6 SCREW SIZE, INTERNAL
26 6 84045 NUT, HEX 6-32, UNDERSIZED
27 3 108071 ASSEMBLY, RELAY, SOLID STATE, 50 A/ 600V
28 6 15013 STANDOFF, 6-32 x1.25 LG.,1/4 HEX WIDTH
29 3 03443 ALUMINUM BRACKET FOR SSR
30 1 21026 HOUSING, WATER LEVEL PROBE 0.140" DIA.
31 1 02010 WELDMENT, WATER LEVEL PROBE, 1.75" LG
32 1 K065 ASSEMBLY, DIGITAL TEMP. PROBE, 14.0"LG W/34" CABLE
For tank assembly and wiring diagram part numbers, call Tech Support at 800-338-2699. Provide the brewer serial number when calling.