AUTO-SERIES BREWERS
Installation, Operation, and Service Manual
TABLE OF CONTENTS
Warning Labels .............................................3
Water Connection .........................................4
Installation Instructions ..................................4
Coffee Preparation Procedures .......................5
Brew Volume Adjustment ..............................5
Brew Basket Rail Adjustment ..........................5
Spare Parts List .............................................. 6
Water Tank Assembly Drawing .......................7
AT-2W/AT-2WE Drawing ................................8
AT-AP/AT-APE Drawing...................................9
AT-3WR/AT-3WRE Drawing ..........................10
AT-TC/AT-TCE Drawing .................................11
Troubleshooting Guide ................................12
Component Replacement Instructions ..........13
Model AT-2W/AT-2WE
Model AT-AP/AT-APE
Prior authorization must be obtained from
Grindmaster Corporation™ for all warranty claims.
Model AT-3WR/AT-3WRE
Model AT-TC/AT-TCE
Grindmaster Corporation™
4003 Collins Lane
Louisville, Kentucky 40245 USA
(502) 425-4776
(800) 695-4500 (USA and Canada only)
(800) 568-5715 (Technical Service only)
FAX: (502) 425-4664
© Grindmaster Corporation, 2007
PRINTED IN THAILAND
0307 Form # BW-340-01
Part # 73254
WARNING LABELS
The following warning labels were on your dispenser when it was shipped from the factory. They should remain on your
dispenser in good, readable condition at all times. If one of your labels is missing or damaged, order a replacement label
immediately.
Part # 71509 (for warmer models only)
Located near warmer plates
Part # 71582
Located on rear and top access panels
Part # 70248
Located on front, behind server
Part # 71949 or 71149
Located on brew basket
CAUTION
Hot liquid in brew
basket could cause
burns.
Remove with care.
Part #71949
Part #71149
Auto Series Brewer Manual
Page 3
WARNING - Read and follow installation instructions before plugging or wiring in machine to electrical circuit.
Warranty will be void if unit is connected to any voltage other than that listed on the name plate.
ƽ
FILL BREWER TANK WITH WATER BEFORE CONNECTION TO POWER SUPPLY
WATER CONNECTION
The following is required for water hook-up:
1) A quick disconnect water connection or enough coiled tubing so the machine can be moved for cleaning
underneath. (required for NSF approved water hook-up)
2) A 1/4" male flare adapter is provided to be attached by the installer to the back of the machine for hook-up to
water supply.
3) Installation to a water filter system is required to prevent lime and scale build up in the machine.
4) Water pipe connections and fixtures directly connected to potable water supply shall be sized, installed, and
maintained in accordance with Federal, State, and Local codes. (required for NSF approved water hook-up)
5) Equipment is to be installed with adequate backflow protection to comply with applicable Federal, State,
and local codes. (required for NSF approved water hook-up)
Minimum water pressure to the machine: 30 psi (2.0 bar)
Maximum water pressure to the machine: 80 psi (5.6 bar)
INSTALLATION INSTRUCTIONS
1) Place the decanter under brew basket, raise top evaporation cover and pour three decanters of water through the
top pour-in opening. Water should come through the brew basket as the third decanter of water drains out of the
pour-in basin.
2) Brewer is shipped with thermostat turned on, (full clockwise position). Plug brewer into a dedicated, grounded
120V/15A circuit (230V/15A circuit for E models).
3) Allow 10-15 minutes for water in tank to heat to brewing temperature. (Hot water may drip from brew basket on
initial thermal expansion of water in the tank). This will not occur thereafter.
4) After water has reached brewing temperature (thermostat will click off, heating noise will stop and green ready light
will be on) pour 1 decanter (60 oz./1.8L) of water through pour-in opening. Machine is now ready to use.
5) Pour 1 decanter of water through pour-in opening to check for proper temperature setting with an accurate
thermometer. Take the temperature of this water at a point below the brew basket opening at the start of the brew
cycle and when the decanter is half full. Recommended temperature of the water is approximately 195°F (91°C) .
6) In higher altitude locations (5,000 feet/1,500m above sea level) the thermostat may have to be adjusted lower to
prevent boiling.
Page 4
Auto Series Brewer Manual
COFFEE PREPARATION PROCEDURES (Pour-Over Mode)
1) Place filter into brew basket.
2) Put the proper amount of coffee into the filter.
3) Slide the brew basket into holder.
4) Place empty decanter on warmer located directly under the brew basket and turn corresponding warmer switch ON.
NOTE: For airpots, open airpot lid, remove pump stem from airpot and place airpot opening directly under center hole
in brew basket.
5) Pour decanter of fresh water through pour-in opening at top of brewer.
6) Hot water will be delivered through the sprayhead. This distributes the hot water evenly over the coffee bed within
the brew basket. The coffee will drain from brew basket into the container below.
7) TURN OFF WARMER WHEN NOT IN USE. (Red light indicates warmer is ON.) Not for airpot brewers.
8) Before brewing next pot, remove brew basket from brew rails and dump filter into waste basket.
COFFEE PREPARATION PROCEDURES (Auto Mode)
1) Place filter into brew basket.
2) Put the proper amount of coffee into the filter.
3) Slide the brew basket into holder.
4) Place empty decanter on warmer located directly under the brew basket and turn corresponding warmer switch ON.
NOTE: For airpots, open airpot lid, remove pump stem from airpot and place airpot opening directly under center hole
in brew basket.
5) Press Brew switch once then release.
6) Valve will turn on approximately 1 minute and fill pour-in basin.
7) Hot water will be delivered through the sprayhead. This distributes the hot water evenly over the coffee bed within
the brew basket. The coffee will drain from brew basket into the container below.
8) TURN OFF WARMER WHEN NOT IN USE. (Red light indicates warmer is ON.) Not for airpot brewers.
9) Before brewing next pot, remove brew basket from brew rails and dump filter into waste basket.
10) Do not press Brew switch more than once during brew cycle.
BREW VOLUME ADJUSTMENT
1) Disconnect power to brewer.
2) Remove plug on upper left side of chassis.
3) With a flat head screwdriver, turn dial clockwise slightly to increase volume and counter-clockwise to decrease
volume.
4) Reconnect power and run a brew cycle to check volume.
5) Repeat steps 1-3 if necessary.
BREW BASKET RAIL ADJUSTMENT
1) Disconnect power to brewer.
2) Remove lid and pour-in basin.
3) Loosen nuts for brew rails.
4) Fit basket in place.
5) Tighten nuts and check basket fit.
Auto Series Brewer Manual
Page 5
SPARE PARTS LIST
Item No. Part No.
Description
Item No. Part No.
Description
Decal, Main Front AT-AP, AT-TC
Decal, Main Front W/Switch Power AT-AP, AT-TC
Deflector, Spray HD
1
2A
2B
3
73035
73252
07327
71155
73173
70818
70820
73222
Water Tank
33A
33B
34
73187-1
73187
06491
06490
07220
70341
73242
71093
73179
73251
73114
73003
71607
71529
73008
73010
73175
73188A
73191
73232
73233
73021
73192
73190
73213
73185
73029
73217-1
73217
73031
73001
73002
13029
Clamp Hose, Nylon 1/2" ID
Clamp, Black 5/8"
Tubing, 5/16"ID x 1/2"OD Silicone
Heat Exchanger Inside Tank
Element, Heating 1400W 120V
Element, Heating 2500W 240V
Element, Heating 1780W 120V
35
Nozzle, Spray HD
4
36
Nut, Lock Palnut Spray HD
Elbow, Silicone 90 deg
5
37
38
Hole Plug
39
Pipe Adapter
6
73037-1 Inlet Tube Assembly
Cover, Tank W/Bracket, Thermostat
40
Timer Relay, 120V
7
73186A
61143
73176
73177
05826
73033
71147
61243
73178
73234
60550
73036
62237
100523
62238
100524
73095
73057
73096
73028
73026
73024
73027
73183
73182
71952
73249
62436
61125
70445
73058
73059
73194
Timer Relay, 230V
8
Nut, Pipe Jam 1/8" NPT
Fitting Brass 1/4"MFL x 3/8"MPT
Fitting Brass 1/4"MFL x 3/8"NPT
Tubing, 3/8"ID x 5/8"OD Silicone
Elbow Brass, 1/8" NPT 3/8" Barb
Grommet, White Silicone
Grommet, Dump Valve
41
42
43
44
45
46
47
48
49
50
Bracket, Panel Spray HD
Top Cover SS, AT-AP, AT-3WR
Panel, Pour-Over Lid
9A
9B
10
11
12
13
14
15
16
17
18
Wire Hinge, Pour-Over Lid
Nut Slotted Hex SS (size M20x1.5)
Pan, Receiving
Assy, Water Line to Faucet
Top Body Assemply AT-AP, AT-TC
Panel, Back AT-AP, AT-APE
Valve Inlet 120V, 50/60Hz
Valve Inlet 230V, 50/60Hz
Bracket, Tank Base AT-AP, AT-APE
Panel Center SS. AT-AP, AT-APE
Panel, Back AT-TC, AT-2W, AT-3WR
Base Tank
Fitting, 1/4"MFL x 3/8" Barb
Tube, Inner Braided Silicone
Clamp Hose, Stainless
Thermostat Regulating
T-Stat, Hi-Limit, 120V Models
T-Stat, 1/2" Manual Reset 230V Models
Bracket, Hi-Limit 120V Models
Bracket, Hi-Limit Manual Reset 230V Models
Bracket, Water Tank
51
52
19
53
54
20
21
55
Panel Center SS. AT-TC, AT-2W, AT-3WR
Base Cover Panel, AT-2W
Decal, Main Front AT-2W
Decal, Main Front W/Switch Power AT-2W
Panel, Warmer Top AT-2W
Bracket, Warmer
Gasket, Tank O-Ring
56
22
Thermostat Clip Lock
57A
57B
58
23
Leg, Support
24
Base Welded
25
Base Cover Panel, AT-AP, AT-AC
Airpot Stopper
59
26
60
Plate, Warmer
27A
27B
28
Rail Brew, RH. Assembly
Rail Brew, LH. Assembly
Brew Basket
61
Heater, Warmer 120V, 100W
A535-028 Heater, Warmer 220V, 100W
62
63
73004
73218A
73079
73080
73078
Top Cover SS, AT-2W
29
Pressure Faucet
Top Body Assemply AT-2W
Base Welded AT-3WR
30
Ready Light, Green 120V
Ready Light, Green 230
Brew Switch
64
65
Base Cover Panel, AT-3WR
Panel, Warmer 3RD, AT-3WR
Decal, Main Front AT-3WR
31
66
32A
Switch Warmer Lighted 230V
Switch Warmer Lighted 120V
Switch Power - Optional
67A
67B
68
73181-1
Decal, Main Front W/Switch Power AT-3WR
Top Body Assemply AT-3WR
Fitting Assembly 1/4MFL x 3/4Hs Brass
73181
73218A
32B
69
61237
Not shown:
61530
61453
Power Cord, 120V
Power Cord, 230V
Page 6
Auto Series Brewer Manual
WATER TANK ASSEMBLY
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Auto Series Brewer Manual
Page 7
AT-2W/AT-2WE PART LIST
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Page 8
Auto Series Brewer Manual
AT-AP/AT-APE PART LIST
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Auto Series Brewer Manual
Page 9
AT-3WR/AT-3WRE PART LIST
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Page 10
Auto Series Brewer Manual
AT-TC/AT-TCE PART LIST
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Auto Series Brewer Manual
Page 11
TROUBLESHOOTING GUIDE
Problem
Possible Source
Check
Solution
No Hot Water
1. Tank heater
1. Check the voltage at the tank
heater terminals. Voltage should be
120V (230V for E models). Check
serial tag for proper voltage.
1. (A) If correct voltage is present at the tank heater
terminals and water is not being heated, replace tank
heater.
(B) If voltage is not present at tank heater terminals,
refer to step 2.
(C) If incorrect voltage is present at tank heater
terminals, check voltage at outlet.
2. Hi-limit thermostat
or main thermostat
2. Check the voltage between the
white wire on the tank heater
terminal and the incoming terminal
(black wire) on the hi-limit
2. (A) If voltage is present on incoming terminal on the
hi-limit thermostat but not on the outgoing terminal,
replace hi-limit thermostat.
(B) Check voltage between black and white wire on
receptacle. If voltage is not present check outlet or
circuit breaker.
(C) If voltage is not present on incoming terminal of
hi-limit thermostat, replace main thermostat.
thermostat, then the outgoing
(black wire) terminal on the hi-limit
thermostat.
Steaming or
Spitting Around
Funnel
1. Main thermostat
2. High altitude
1. Thermostat contact stuck or out of
calibration
2. For altitude above 5,000 feet (1,500m)
1. (A) Adjust thermostat to lower temperature setting.
(B) Thermostat should be calibrated or replaced.
Dripping
1. Not siphoning properly 1. Water should flow from sprayhead freely 1. (A) Clean sprayhead holes
(B) Check tightness of sprayhead tube.
(C) Check brass elbow in tank for debris
2. Replace or repair inlet valve as needed
2. Leaky fill valve
2. Turn off water supply to see if
dripping stops
Dry Coffee
1. Filters
1. Are correct filters being used
1. Use correct filter
Remaining on
Brew Basket
2. Not siphoning properly 2. Refer to “dripping” step 1
2. Refer to “dripping” step 1
3. Filter should be centered in brew basket and
coffee bed should be level.
3. Improper loading of
brew basket
3. Filter and coffee in brew basket
Warmer Station
1. Warmer - defective
1. Voltage at warmer terminals should
be 120V (230V for E models).
1. If voltage is present on terminals, but warmer is
not heating, replace warmer.
2. Warmer On/Off switch 2. If voltage is not present on warmer
terminals, check continuity of switch
2. If switch does not make and break continuity
when turned on and off, replace switch.
3. All connections should be tight.
3. Bad harness
3. Check connections between harness
and switch, and between switch and
warmer.
Overflowing
1. Receiving container
not completely empty
at start of brew cycle.
1. Operating instructions
1. Always start brew cycle with empty container.
2. Not siphoning properly 2. Refer to “dripping” step 1.
2. Refer to “dripping” step 1.
3. Adjust timer
3. Check valve on-time with watch
3. Refer to “Brew Volume Adjustment” section
Low Pot Level
1. Adjust timer
1. Check valve on-time with watch
1. Refer to “Brew Volume Adjustment” section
Excessively Long 1. Lime scale build-up
Brew Times
1. Remove spray head deflector and check 1. Delime machine.
nozzle.
Little or No Water 1. Lime scale build-up
Be sure water is turned on.
1. Delime heat exchanger.
2. Replace or repair inlet valve.
From Faucet
2. Clogged inlet valve
If you still need help, call an authorized dealer in your area or Grindmaster Corporation’s Technical Service Department. You can reach
Technical Service at (502) 425-4776 or (800) 695-4500 (USA and Canada only) Monday - Friday, 8:00 AM - 8:00 PM EST.
Please have the model and serial number ready so that accurate information can be given.
Prior authorization must be obtained from Grindmaster Corporation’s Technical Service Department for all warranty claims.
Page 12
Auto Series Brewer Manual
COMPONENT REPLACEMENT INSTRUCTIONS
WARNING - Disconnect power before servicing. Risk of electric shock.
ƽ
These steps apply to replacement of TANK, TANK HEATER, and HI-LIMIT or MAIN THERMOSTAT
1. Remove brewer lid. Disconnect electrical connectors from upper warmer plate if applicable.
2. Remove pour in basin assembly (receiving pan).
3. Disconnect electrical terminals and hoses as needed.
4. Remove front two screws mounting the tank.
5. Lift tank and lid completely out of tank.
6. Remove two rear screws mounting tank to tank lid.
7. Reverse steps 1-6 to reassemble new tank assembly.
THERMOSTAT, HI-LIMIT
1. Disconnect wires to hi-limit thermostat.
2. Remove two screws and remove thermostat.
3. Check continuity of the new hi limit thermostat before installing.
4. Screw down new t-stat and reconnect wires.
5. Make sure the hi-limit thermostat is securely mounted and that all electrical connections are tight and isolated.
MAIN THERMOSTAT
1. Disconnect wires and remove tank and tank lid assembly.
2. Remove two rear screws mounting tank to tank lid.
3. Remove screws which secure thermostat to tank lid.
4. Loosen thumb nut securing capillary bulb.
5. Remove grommet from top of tank lid by pressing up with thumb and pulling capillary bulb out through hole.
6. Reverse steps 1-5 to reassemble new tank assembly.
TANK HEATING ELEMENT
1. Disconnect wires and remove tank and tank lid assembly.
2. Remove two rear screws mounting tank to tank lid.
3. Loosen thumb nut securing capillary bulb and remove bracket.
4. Remove two brass nuts and remove element.
5. Install new element and washers with nuts secured tightly.
6. Inspect tank lid gasket and replace if necessary.
7. Reverse steps 1-3 to reassemble.
WARMER ELEMENT
1. Remove retaining screws from warmer plate.
2. Lift plate and disconnect leads.
3. Remove nuts and washers holding retaining plate and warmer element to plate.
4. Reverse steps 1-3 to reassemble.
Auto Series Brewer Manual
Page 13
Grindmaster® Coffee Grinders and Brewers • PrecisionBrew™ Brewing Systems • Espressimo® Espresso Machines
Crathco® Hot Beverage Dispensers • Crathco® Cold and Frozen Beverage Dispensers • AMW Coffee and Tea Systems
Tel (502) 425-4776 • Fax (502) 425-4664 • 1-800-695-4500 (USA & Canada only)
P.O. Box 35020 • Louisville, KY 40232 • USA
© Grindmaster Corporation, 2007
PRINTED IN USA
0307 Form # BW-340-01
Part # 73254
|