Grindmaster B-DGP Service Manual

PrecisionBrew

™

Digital Decanter Brewers

Operator Manual

Grindmaster-Cecilware

4003 Collins Lane, Louisville, KY 40245 USA
Phone: [phone] Toll Free: 800.695.4500
Fax: [phone]
Web: gmcw.com Email: [e-mail]

Safety Information..................2

Unpacking ...............................3

Installation...............................3

Adjustments ............................5

Operation ................................8

Cleaning...................................9

Troubleshooting Guide.........10

Parts Diagram and List..........12

Wiring Diagram.....................18

Thank you for purchasing this quality brewer. For your safety and the safety of others, read all warnings and the
operator manual before installing or using the product. Properly instruct all operators. Keep training records. For
future reference, record serial number here:

Table of Contents

©2016 Grindmaster-Cecilware

Printed in USA

0516 Form # AM-375-11

Part # 390-00016

Grindmaster-Cecilware provides the
industry’s BEST warranty. Visit gmcw.com
for warranty terms and conditions.

Model B-6

Model B-ID

GB Series Cecilware

®

2

For safe and proper operation, the appliance must be placed in a stable, vertical position.

To reduce risk of serious burns or scalding, do not place hand or other body parts under dispenser or container
while product is brewing.

Always unplug unit from power supply before servicing.

Hot liquid in brew basket could cause burns. Remove with care.

Warmers and surfaces are hot and can cause burns.

CAUTION

To reduce risk of electrical shock, do not remove side panels. No user-serviceable parts inside. Repair should be
done by authorized service personnel only.

The appliance is not intended for outdoor use.

Do not clean with a water jet or use in an area where a water jet may be used.

Cleaning and maintenance shall be made only by properly trained persons with supervision.

Do not remove decanter or basket while product is brewing.

This appliance is not intended for use by persons with reduced physical, sensory or mental capabilities, or lack
of experience and knowledge, unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.

Children should be supervised to ensure that they do not play with the appliance.

Do not alter or deform the power cord or plug in any way! Altering or deforming the plug may cause electrical
shock, damage unit, and will void warranty.

To reduce risk of expolsion or fire, do not use near combustibles.

WARNING

Safety Information

2 American Metal Ware B-Series

Important Safety Information

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.

For your safety and the safety of others, read all warnings and the operator manual before installing or using
the product.

DANGER: This term warns the user of imminent hazard that will result in serious injury or death.
WARNING: This term refers to a potential hazard or unsafe practice, which could result in serious injury or death.
CAUTION: This term refers to a potential hazard or unsafe practice, which could result in minor or moderate

injury.
NOTICE: This term refers to information that needs special attention or must be fully understood.

Use only on a circuit that is properly protected and capable of the rated load.

Electronically ground the chassis.

Follow national and local electrical codes.

Do not use extension cord.

Do not clean with water jet.

This equipment must be installed in compliance with applicable Federal, State, and/or Local plumbing codes
having jurisdiction. This product requires an approved back flow prevention water device, such as a double
check valve, to be installed between the machine and the water supply.

NOTICE

B-Series American Metal Ware 3

Unpacking

Unpacking Instructions

Carefully unpack the machine and inspect immediately
for shipping damage. The packaging may contain un­attached parts. Your machine was shipped in a carton
designed to give it maximum protection in normal
handling. It was thoroughly inspected before leaving
the factory. In case of damage, contact the shipper, not
Grindmaster-Cecilware.

Installation

Mechanical Installation

NOTICE: This brewer should be installed by a

knowledgeable and experienced commercial
equipment installer.

1. Inspect unit to see if any damage occurred in
shipment.

2. Position brewer on counter. Place on sturdy
permanent counter top. Adjust the feet to level the
brewer. With bubble level, check to see that the
brewer is level on countertop.

Water Hook-up

NOTICE: This equipment must be installed in

compliance with applicable Federal, State, and/or Local
plumbing codes having jurisdiction. This product
requires an approved back flow prevention water
device, such as a double check valve, to be installed
between the machine and the water supply. Incoming
pressure should be greater than 30 psi and not more
than 80 psi.

1. The incoming water supply should have a shut-off
valve connected in-line. The end should have a
female 1/4" flare fitting. Water supply should be a
1/4" I.D. dedicated line.

2. Prior to installing the brewer, flush out the water
line by running approximately 1 gal. of water into
a pail. This will ensure no sediment from a new
installation can get in the brewer.

3. Make sure your source water is turned off. Connect
the water line’s 1/4" female flare fitting to the 1/4"
male fitting on the hose connector.

4. Make sure brewer is unplugged. Connect the water
line to the brewer with the hose connector.

5. Turn the water valve on, sending water to the
brewer. If there are any leaks, tighten connections
to stop leakage.

NOTICE: Single head machines may be used without

a pressurized water supply. (See Pour-Over Mode
section)

Electrical Hook-up and Start-up Procedure

NOTICE: This equipment must be installed in

compliance with applicable Federal, State, and/or Local
electrical codes having jurisdiction. Do not use
extension cords. Make sure that the outlet the brewer
plugs into is grounded.
(Refer to serial tag to verify model number of your
machine)

1. Remove front panel.

2. Connect electrical service through rear of machine
to terminal block (inside front panel) marked L1, N,
and L2. (See Figures A and B)

3. On dual volt units, flip voltage switch (inside front
panel next to terminal block) to 120V for 120 Volt
service or 240V for 120/208, or 120/240 Volt service.
(See Figures A, B, and table next page)

4. Re-install front panel.

5. Turn on (plug-in) electrical service to brewer.

6. Water tank will fill after a 7-second delay. The
machine will make a hissing sound when this occurs.
On single head models, allow approximately 1.5
minutes for the brewer to fill. On two head models,
allow approximately five minutes for the brewer to
fill.

NOTICE: If water supply is inadequate or not

connected, display will read “P-O” after 4 minutes of
fill time (Refer to Pour-Over Mode section). If Fill Cycle
times out and display reads “P-O” before tank is full,
turn unit OFF then ON again to reset and continue
filling.

7. The tank will begin heating slightly before machine
fills.

8. Turn brewer on by pressing ON/OFF switch in front
of machine. (Light will illuminate)

9. The brewer settings can be adjusted through the
front touch pad. (Refer to Adjustments section)

10. The water will be hot and the brewer will be ready
to brew when “READY” light illuminates.

11. Set Brew volume. (Refer to Setting Brew Volume
section)

WARNING: Risk of electrical shock or fire.

Wiring connections must be performed by a qualified
technician.

Electrical Hook-up and Start-up Procedure (continued)

4 American Metal Ware B-Series

Installation (continued)

Applied Volts Models Watts Amps NEMA Plug Cord AWG Connections

120

B-3, B-3WL, B-3WR 1800 15

5-15P, 5-20P for CUL 3X14

Hot to L1
Neutral to N
Ground to ground screw

B-SAP, B-ID 1780 14.9

120/208

B-3, B-3WL, B-3WR 2920 14.1

L14-20P 4X12

Hot to L1
Neutral to N
Hot to L2
Ground to ground screw

B-SAP, B-ID, B-DAP, B-DGP 2620 12.6

B-6 5110 24.6

L14-30P 4X10

B-DAP, B-DGP (30A) 4510 21.7

120/240

B-3, B-3WL, B-3WR 3800 15.9

L14-20P 4X12

Hot to L1
Neutral to N
Hot to L2
Ground to ground screw

B-SAP, B-ID, B-DAP, B -DGP 3500 14.6

B-6 6600 27.5

L14-30P 4X10

B-DAP, B-DGP (30A) 6000 25

Figure A

For 120V, 15A or 20A Service (2 Wire + Ground)

L1

Connect Neutral (N) to Middle

Connect Hot (L1) to Left Side

Connect Ground to Screw

On Dual Volt Units, Flip Switch to “120V”

NL2

Figure B

For 120/208-240V, 20A Service (3 Wire + Ground)

L1

Connect Neutral (N) to Middle

Connect Hot (L1) to Left Side

Connect Ground to Screw

On Dual Volt Units, Flip Switch to “240V”

N

L2

Connect Hot (L2) to Right Side

POWER REQUIREMENTS: (Refer to serial tag for voltage to be supplied.)

B-Series American Metal Ware 5

Installation (continued)

FACTORY SETTINGS (for each dispense head)

• Tank temperature is set at 200 degrees F.

• Brew time is pre-set at 2:20. (Volume/time to be set
on-site)

• Pulse Brew is set for 1 pulse, 20 sec on, 20 sec off.

• Warmer Energy Savings mode is set for 60-minutes.
(“OFF” for models without warmers)

• Low Temp / No Brew option is set to “OFF” or
disabled.

• Pour over setting override is set to “no” or plumb in.

• Settings lock-out jumper on controller is set in
“unlock” position.

Adjustments

Refer to B-Series Programming Chart on page 6.

NOTE: Set each dispense head individually on two
head models with two controllers and serial
numbers A166225 and lower (without a -P suffix).
Tank temperature must be set to the same setting
on both heads in order for the unit to operate
properly.

Tank Temperature:

Left display controls this.

• Press-and-hold both “up” and “down” arrows for 5
seconds.

• The display will indicate either “d F” or “d C”.
(Fahrenheit or Celsius)

• Press up or down arrow to change from one scale to
the other.

• Press “BREW” button to accept and proceed to the
next setting.

• The display will read temperature value in the scale
previously selected.

• Press up or down arrow to change temperature value.

• Press “BREW” button to accept and proceed to the
next setting.

Brew Time:

• The display will read “br ”. (brew time)

• Press “BREW” button to proceed to the next setting.

• The display will read the set brew time in minutes and
seconds. (ex: 2.20)

• Press up or down arrow to change time value.

• Press “BREW” button to accept and proceed to the
next setting.

Pulse Brewing Mode:

• The display will read “P-b”. (pulse brew)

• Press “BREW” button to proceed to the next setting.

• The display will read “OFF” - “1”- ”6”.

• Press up or down arrow to change number of pulses.

• Press “BREW” button to proceed to the next setting.

• The display will read “0.05” - “0.30”.

• Press up or down arrow to change pulse-on time for

each pulse in seconds.

• Press “BREW” button to proceed to next setting.

• The display will read “0.05” - “0.30”.

• Press up or down arrow to change pulse-off time for

each pulse.

• Press “BREW” button to accept and proceed to the

next setting.

Energy Savings Mode (Warmer shut-off):

• The display will read “E-S”. (energy savings)

• Press “BREW” button to proceed to the next setting.

• The display will read “Off” - “10” - “240” in multiples

of 10.

• Press up or down arrow to change time value in

minutes. Must be “OFF” for models without warmers.

• Press “BREW” button to accept and proceed to the

next setting.

Low Temp/No Brew Mode:

• The display will read “Ltn” (Low Temp/No Brew).

• Press “BREW” button to proceed to the next setting.

• Press up or down arrow to change to “ON” or “OFF”.

• Press “BREW” to accept and proceed to the next

setting.

Pour-Over Mode:

Left display controls this.

• The display will read “P-O” (pour-over).

• Press “BREW” button to proceed to the next setting.

• Press up or down arrow to change to “YES” or “NO”.

Plumbed-in units must be set to “NO”.

• Press “BREW” button to accept and exit menu.

Setting Brew Volume:

• Remove brew basket & spray head.

• Make sure “READY” light is on.

• Place empty server under exit nozzle to capture water.

• Press “BREW” button to fill water lines.

• Press “BREW” button again after approximately 10

seconds to stop water flow.

• Empty server then place under exit nozzle.

• Press-and-hold “BREW” button for 5 seconds until

display reads “Pro”, then release.

• Press-and-release “BREW” button to initiate brew.

• The brew valve opens and the time begins to count

up on display.

• Water will flow into decanter.

• When water level reaches desired amount, press-and-

release “BREW” button again.

• Time value will flash in the display.

• Press-and-release “BREW” button within 10 seconds

to set time.

• Reinstall spray head and brew basket.

• Repeat process for each brew head.

Adjustments (continued)

Programming

6 American Metal Ware B-Series

B-Series American Metal Ware 7

Adjustments (continued)

User Lockout

User Lockout is achieved via the position of the LOCK jumper on the board header. Locate the header on the
board (shown below) and place the jumper in the desired position. In the Locked position all menus in this
document are locked out, and the unit will only allow brewing functions. There are two versions of the header,
10 pin and 2 pin. Both configurations are shown below.

User Lockout Jumper

User
Lockout
Jumper

Locked

Unlocked

LOCK

LOCK

2 Pin Version

1 LOCK

1 LOCK

Locked

Unlocked

10 Pin Version

Controller Fuse Sizes

Fuses

Controller (pn A530-059) uses (2) 5mm x 20mm 5 Ampere fuses.

Controller (pn A530-056) uses (2) fuses - 1.25” x 0.25” 3AG series 312.

- (1) is a 1 Ampere 3AG-1

- (1) is a 5 Ampere 3AG-5

8 American Metal Ware B-Series

Brewing Procedure:

• Place a new paper filter in the brew basket.

• Put desired amount of ground coffee in brew
basket. (3.5 oz (100 grams) maximum)

• Place decanter or airpot under brew basket.

• Be sure lower warmer is on. (if available)

• Press “BREW” button to start brewing.
The “READY” light will flash for the entire brew cycle.
Water will dispense for the set time of brew, and light
will flash after water is dispensed to denote “drip
time”.
(ex.. Time set for 2:30, water is dispensed for 2:30, and
light continues to flash for another 1:15 for total brew
cycle of 3:45.)

Do not remove the brew basket while the
“READY” light is blinking.

A stop function is added to the “BREW” switch. Pressing
the “BREW” switch during a brew cycle will stop the
brew. Coffee will need to be emptied from brew basket
and brew procedure will need to be started again.
After a brew cycle, the tank must reheat and the
“READY” light must be lit before starting the next cycle.
Reheat (recovery) time is dependent on voltage applied
and inlet water temperature.
Approximate reheat times for a 64 oz decanter are as
follows.

120 Volt supply: 3-4 minutes

120/208 Volt supply: 30-90 seconds

120/240 Volt supply: 0 – 30 seconds

Pulse Brewing Mode:

• When mode is “ON” (number of pulses, pulse on, and
pulse off time), and a brew cycle is initiated, water is
dispensed for the ON time then stops for the OFF time
to define one pulse. This repeats for number of pulses
programmed. After pulsing is finished, the water
continues to dispense for the remaining set time.
During the pulse-off time, the water infuses the coffee
and the bed rises to allow for better extraction.

• When mode is “OFF” and a brew cycle is initiated,
water is dispensed continually for the entire set time
without any delay.

Energy Savings Mode (Warmer Shut-Off):
(ONLY FOR MODELS WITH WARMERS)

When set time has elapsed after a brew cycle, the lights
above the warmer switches will flash and the warmers
will automatically turn off. To stop lights from flashing,
press one of the warmer switches. To turn warmers back
on, press corresponding warmer switch. The timer will
reset when a new brew cycle is initiated.
Refer to Adjustments section to adjust time values or
simply disable mode. Time values may be adjusted from

OFF to 10 minutes to 240 minutes in increments of 10
minutes.

Low Temp/No Brew Mode:

When set to “ON”, a brew cycle cannot be initiated
until tank is hot and “READY” light is ON.
When set to “OFF”, a brew cycle may be initiated at any
time.

Pour-Over Mode:
Note: Not available on B-6, B-DAP, and B-DGP
(twin) models.

Brewers are capable of operating without a pressurized
water source.

If there is no pressurized water source, brewer
can be set-up as a pour-over.

1. If no water is in the tank to begin with, pour
about three decanters of fresh water into the
basin. (Fig. D next page). A small amount of
water should remain in the basin.

2. If tank already has water, pour fresh water into
basin (Fig D) until a small amount is in the basin
and no longer drains into the tank.

3. Place server under the EMPTY brew basket.

4. Turn power on to machine.

5. Go into Settings Mode and change “P-O” to
“YES”.

6. Display will read “P-O”. (Fig C)

7. Wait until Ready light illuminates.

8. Press-and-release Brew button to initiate a
brew cycle.

9. Water should stop flowing before READY light
stops flashing to create a “short pot”.

10. After tank water recovers and READY light
illuminates, brewer is ready to brew coffee. See

Brewing Procedure.

If brewer is in operation (connected to a
pressurized water source) and water is shut off
for four minutes, display will read “P-O” (Fig C)
and brewer can be used as a pour-over:

1. Place server under the EMPTY brew basket.

2. Wait until Ready light illuminates.

3. Press-and-release Brew button to initiate a
brew cycle.

4. Water should stop flowing before READY light
stops flashing to create a “short pot”.

5. After tank water recovers and READY light
illuminates, brewer is ready to brew coffee. See
Brew Procedure.

If water pressure problem is resolved, simply press Off
then On.

Operation

B-Series American Metal Ware 9

Operation (continued)

Brew Procedure while brewer is in pour over
“P-O” mode:

1. Wait until tank water heats up and READY light is
on.

2. Place brew basket in place with ground coffee
inside filter.

3. Pour a full (64oz) maximum container of fresh
water into basin at top/front of brewer. (Fig D)

4. Place container under brew basket.

5. Press-and-release “BREW” button to initiate brew
cycle.

Counter:

The brewer is equipped with a counter that displays the
total number of brew cycles for each dispense head.
After turning the brewer on, the number will scroll
across the display two times and then clear.

Cleaning

Cleaning Cabinet

• The outside of the brewer can be cleaned with a damp
cloth, a household dusting spray or a stainless steel
cleaner. Do not use an abrasive such as Scotchbrite or
Brillo pads. These may mar the finish.

• Wipe the underside of the cabinet hood with a clean
cloth. Be especially careful when using soap or
detergent around the sprayhead.
Any soap left on the deflector may impart an
unpleasant taste to the first brews.

Cleaning Warmers

The warmer plates are easy to clean and will maintain
its appearance longer if cleaned regularly. Coffee stains
can be wiped off with a damp cloth. Use detergent or
sanitizer for heavy deposits, but refrain from using
abrasives.

Cleaning Brew Basket, Airpots And Decanters

Use commercial grade urn cleaner (as directed by
manufacturer) and rinse thoroughly.

Figure C

Figure D