Wibur Curtis Company C500AP User Manual

C500AP & C500APT  
AIRPOT COFFEE BREWER  
-
Service Manual  
Throughout this service manual, whenever the airpot brewer model C500AP is mentioned,  
this information is typical to both the C500AP and C500APT. All parts are common except  
where noted.  
Table of Contents  
Unpacking . . . . . . . . . .  
Shipping List . . . . . . . . .  
Rough-in Drawing . . . .  
Start up . . . . . . . . . . . . .  
Coffee Brewing . . . . .  
Care & Maintenance  
1
1
1
2
2
3
3
5
7
Troubleshooting . . . . . .  
Wiring Diagram . . . . . .  
Illustrated Parts List . . .  
Warranty . . . . . . . . . Back  
Cover  
Carton Contents  
Qty  
Item  
1
1
1
25  
1
Brewer, C500AP  
Brew Cone, S/S  
Fitting, Flare Elbow  
Paper Filters  
ServiceManual  
®
®
C
Wilbur Curtis Co., Inc.  
6913 West Acco Street, Montebello, CA 90640-5403 U.S.A.  
Tel: (323) 837-2300 Fax: (323) 837-2401  
C500AP Airpot Coffee Brewer  
START-UP  
1. Remove top cover of brewer. Remove lid from heating tank. Hand fill tank until water level is  
approxmately two inches below probe tip.  
2. Connect the water line to the brewer using ¼" copper tubing with ¼" female flare fitting.  
3. Turn on water.  
4. With top cover removed, locate the thermostat (see illustration, page 8, #37), turn the thermostat shaft  
clockwise until it stops. The BREW READY indicator light will go off when the thermostat is on.  
5. Plug unit into power supply outlet and flip power switch (behind unit) to ON position. Turn ON/OFF  
switch to ON position. Water should flow into heating tank. Check to see that the water stops flowing  
when it reaches the probe tip. When this is verified, replace the tank lid and top cover of machine.  
6. The warm-up time for the water in the tank to reach brewing temperature is from 15 to 20 minutes. The  
BREW READY indicator light will come on when the water is hot enough to start brewing.  
COFFEE BREWING  
Pour ground coffee into the filter and brew  
cone.  
1
Slide the brew cone onto the guide rails as far  
in as it will go.  
2
Place an empty, open airpot on the deck be-  
neaththebrewcone.PushtheBREWSWITCH  
to start. Hot coffee will start to flow from the  
brew cone.  
3
CAUTION HOT LIQUID. BREW INTO AN EMPTY AIRPOT ONLY.  
DO NOT REMOVE BREW CONE UNTIL IT HAS COMPLETELY  
DRAINED.  
!
[ 2 ]  
C500AP Airpot Coffee Brewer  
CARE AND MAINTENANCE OF C500AP  
Preventive maintenance is essential in keeping your Curtis coffee brewer performing at it's peak. Regular  
cleaning will pay off with an appealing, high performance coffee brewing machine.  
Preventive Maintenance  
1. Remove the sprayhead from brewer and clean it once a week; more often in heavy lime areas.  
2. The inside of the heating tank may, occasionally, require removing of lime build-up. The  
frequency is determined by local water conditions.  
WARNING - When cleaning the unit, do not use cleansers, bleach liquids, powders or any other  
substance containing chlorine. These products will promote corrosion and will pit the stainless steel.  
USE OF THESE PRODUCTS WILL VOID YOUR WARRANTY.  
Daily Cleaning  
Using a daily routine of cleaning the external parts of the C500AP should maintain it's new appearance and  
insure that the flavor of the coffee is always good.  
1. Wipe off any spills, dust or debris from exterior surfaces.  
2. Rinse out the brew cone.  
3. Clean sprayhead and dome using a non-toxic cleaner and a damp cloth.  
4. Clean the brew cone slide rails with a brush or damp cloth. Dry thoroughly.  
Stainless Steel Polish can be used to clean the outside surfaces of the C500AP coffee brewer. This is to  
prevent scratching of the stainless steel surfaces.  
TROUBLE SHOOTING:  
PROBLEM: WATER DOES NOT FLOW INTO HEATING TANK.  
SOLUTION  
POSSIBLE CAUSE  
Make sure the brewer is receiving enough water pressure. Open the  
water line and verify water flow.  
1. Water line turned off  
or water filter needs  
changing  
Turn the power off. Disconnect wires from water inlet coil terminals and  
connect a power cord to the terminals. Plug cord into a 120V outlet and  
verify if water flows when plugged in and stops when power is discon-  
nected. If valve fails this test, replace valve or coil.  
2. Water inlet valve coil  
burned out  
When the water level gets below the probe tip, water should automati-  
cally refill the tank. If not, pull wire off the probe terminal. Water should  
now start flowing into the tank. If not, check the water level control board  
(see step 4) or inlet valve (step 5).  
3. Grounded probe  
[ 3 ]  
C500 AP Air Pot Coffee Brewer  
TROUBLE SHOOTING CONTINUED:  
SOLUTION  
POSSIBLE CAUSE  
4. Defective or burned out  
water level control  
board  
Pull wire out of probe terminal. With a Volt meter, check voltage at the  
water inlet coil terminals. This should read 110-120 volts. If no voltage is  
present, check Liquid Level Control board. Make sure the L.L.C. board is  
energized on terminals 2 & 3. The L.L.C. board is grounded to the chas-  
sis of the machine by contacting the board to the mounting bracket. Make  
sure board is grounded here. Check for loose connections at terminals.  
When the water level control board fails to energize the water inlet valve,  
the board should be replaced  
PROBLEM: WATER HEATING TANK OVERFLOWING.  
SOLUTION  
POSSIBLE CAUSE  
5. Defective water inlet  
valve  
Turn power off and observe water level. If water continues to flow in,  
valve is leaking; clean or replace valve.  
6. Probe limed up  
Pull wire off from probe terminal. Touch the body of the heating tank  
with the end of this wire. If water stops, try cleaning the probe. Probe  
may have to be replaced.  
7. Non-grounded or loose  
terminal connections at  
liquid level control  
board  
Liquid level control board must be securely grounded. Check for loose  
connections at the terminals. Check for voltage at the inlet valve termi-  
nals. If there is voltage present at the inlet valve terminals, replace the  
L.L.C. board.  
PROBLEM: WATER IN TANK DOES NOT GET HOT OR WATER TEMPERATURE TOO LOW  
SOLUTION  
Check thermostat to make sure it is in the ON position.  
Replace thermostat.  
POSSIBLE CAUSE  
8. Thermostat turned OFF  
9. Defective thermostat  
10. Burned out heating  
element  
Check element for continuity and/or check with clamp ammeter. This  
should show a reading of approximately 15 amps. If no power is going  
through element, replace it.  
PROBLEM: WATER NOT FLOWING FROM SPRAYHEAD.  
SOLUTION  
POSSIBLE CAUSE  
11. Water level is too low  
in heating tank  
Check water level in tank. If water is not flowing into the tank, review  
steps 1 thru 4, on previous page.  
12. Defective brew switch  
With the power off, check the continuity between terminal 4B & 5B.  
When the switch is pressed, there should be solid continuity between  
these two terminals. If not, replace the switch.  
[ 4 ]  
C500 AP Air Pot Coffee Brewer  
TROUBLE SHOOTING CONTINUED:  
SOLUTION  
POSSIBLE CAUSE  
13. Defective brew timer  
(WC-604)  
Make sure the timer is receiving 110 to 120 volts at terminals B and A.  
Measure the voltage across terminals 6 and A on the timer when it has  
been activated. There should be 110 to 120V going to the dump valve. If  
not, then the timer is faulty. Replace timer.  
14. Defective dump valve  
or coil  
If the timer is functioning properly (step 13); next check the dump valve.  
Measure voltage across the two terminals of the valve coil. You should  
read 110 to 120 volts. Check also for clogging or lime deposits. Clean  
lime or clog if present. Replace valve or coil.  
WIRING DIAGRAM  
COMMON STUD  
CHASIS GROUND  
[ 5 ]  
WIRING DIAGRAM  
[ 6 ]  
C500 AP Airpot Coffee Brewer  
ILLUSTRATED PARTS, MAIN VIEW  
[ 7 ]  
C500 AP Airpot Coffee Brewer  
ILLUSTRATED PARTS, DETAIL BUBBLES  
B
59  
60  
59  
8 ]  
C500 AP Air Pot Coffee Brewer  
PARTS LIST  
INDEX  
NUMBER NUMBER  
PART  
DESCRIPTION  
1
2
5
WIRE BREW BASKET FOR WC-3323  
BREW CONE COMPLETE, STAINLESS STEEL, 7 1/8"  
LABEL,CAUTION  
WC-3317  
WC-3323  
WC-3963  
6
7
UNIVERSAL BREW CONE  
HOT WATER FAUCET  
WC-3621  
WC-1809  
8
9
FAUCET SEAT CUP, SILICONE  
ON/OFF SWITCH  
WC-1806  
WC- 114R  
10  
BREW SWITCH  
WC- 122  
11  
SWITCH PANEL  
WC-6317  
12  
BREW READY LIGHT  
WC- 202  
13  
14  
15  
16  
LIQUID LEVEL CONTROL BOARD, 120V.  
SHOCK GUARD, FISH PAPER  
#8 EXTERNAL LOCK WASHER  
SCREW, 8-32x¼ PHILLIPS TRUSS HD SS  
FITTING,SPRAYHEAD  
WC- 608  
WC-4380  
WC-4329  
WC-4525  
17  
WC-2977  
18  
19  
TUBING,SILICONE,5/16"I.D  
DUMPVALVE  
WC-5310  
WC- 817  
20  
LOCK NUT, 5/8"  
WC-4213  
21  
SCREEN, DRIP TRAY  
WC-6221  
22  
23  
24  
25  
27  
29  
30  
31  
32  
33  
34  
35  
36  
37  
41  
42  
43  
44  
45  
46  
48  
49  
50  
51  
WC-2936  
WC-6217  
WC-3502  
WC- 102  
WC- 826L  
WC-4436  
WC-1200  
WC-1408  
WC-2401  
WC-4616  
WC-6215  
WC- 604  
WC-5450  
WC- 515R  
WC-54052  
WC-5851  
WC-43062  
WC-4543  
WC-4211  
WC-4212  
WC-29010  
WC-29009  
WC-5502  
WC-2938  
SPRAYHEAD, RED  
COVER, CENTER WRAP  
BUMPER LEG, 8-32 STUD  
TOGGLE SWITCH  
VALVE, INLET 1 GPM 120V 10W  
SCREW, 4x3/8 PHIL PAN HEAD  
POWER CORD  
CORD GRIP  
FLARE ELBOW 1/4 x 3/8  
SCREW, 1/4-20x½ PHILLIPS PAN HEAD STAINLESS STEEL  
TIMER COVER  
TIMER  
COVER, TOP  
THERMOSTAT  
HEATINGTANKCOMPLETE, LESSHEATINGELEMENTS  
COVER, TANK W/ NOTCHES  
GASKET, TANK LID  
SCREW, 8-32x 1" SLOTTED HEX SS 18-8 WASHER HEAD  
NUT,3/8"JAM  
NUT,5/8"JAM  
FITTING, BARBED OVERFLOW  
FITTING,BARBEDINLET  
PROBE, WATER LEVEL  
FITTING, 1/8" HEX FOR WATER LEVEL PROBE  
[ 9 ]  
C500 AP Air Pot Coffee Brewer  
PARTS LIST, CONTINUED...  
INDEX  
NUMBER  
PART  
NUMBER  
DESCRIPTION  
52  
53  
54  
55  
56  
57  
59  
60  
63  
WC-4394  
WC-4306  
WC- 904-04  
WC-5409  
WC-43058  
WC-3685  
WC-3765L  
WC- 829  
WC-3763  
SHOCK GUARD FOR HEATING ELEMENT  
WASHER, 9/16" I.D. TEFLON  
ELEMENT, HEATING 1.6KW 120V W/ JAM NUT & SILICONE WASHERS  
CLIP,THERMOSTATCAPILLARY  
PLUG, TANK DRAIN PP RED  
INSULATION,WRAPC500AP  
KIT, INLET VALVE REPAIR USE ON WC-825/WC-826/WC-826L/WC-847  
WASHER, FLOW  
KIT, DUMP VALVE FOR WC866, WC889, WC816, WC817 & WC818  
Wilbur  
Co., Inc.  
Wilbur Curtis Co., Inc.  
6913 West Acco Street, Montebello, CA 90640-5403 U.S.A.  
Tel: (323) 837-2300 Fax: (323) 837-2401  
[ 10 ]  
Product Warranty Information  
The Wilbur Curtis Company certifies that its products are free from defects in material and workmanship under normal use. The following limited  
warranties and conditions apply:  
3 Years, Parts and Labor, from Original Date of Purchase on digital control boards.  
2 Years, Parts, from Original Date of Purchase on all other electrical components, fittings and tubing.  
1 Year, Labor, from Original Date of Purchase on all electrical components, fittings and tubing.  
Additionally, the Wilbur Curtis Company warrants its Grinding Burrs for Forty (40) months from date of purchase or 40,000 pounds of coffee, whichever  
comes first. Stainless Steel components are warranted for two (2) years from date of purchase against leaking or pitting and replacement parts are  
warranted for ninety (90) days from date of purchase or for the remainder of the limited warranty period of the equipment in which the component is  
installed.  
All in-warranty service calls must have prior authorization. ForAuthorization, call the Technical Support Department at 1-800-995-0417. Effective date  
of this policy isApril 1, 2003.  
CONDITIONS & EXCEPTIONS  
The warranty covers original equipment at time of purchase only. The Wilbur Curtis Company, Inc., assumes no responsibility for substitute replacement  
parts installed on Curtis equipment that have not been purchased from the  
Wilbur Curtis Company, Inc. The Wilbur Curtis Company will not accept any responsibility if the following conditions are not met. The warranty does not  
cover and is void under the following circumstances:  
1) Improper operation of equipment: The equipment must be used for its designed and intended purpose and function.  
2) Improper installation of equipment: This equipment must be installed by a professional technician and must comply with all local electrical,  
mechanical and plumbing codes.  
3) Improper voltage: Equipment must be installed at the voltage stated on the serial plate supplied with this equipment.  
4) Improper water supply: This includes, but is not limited to, excessive or low water pressure, and inadequate or fluctuating water flow rate.  
5) Adjustments and cleaning: The resetting of safety thermostats and circuit breakers, programming and temperature adjustments are the  
responsibility of the equipment owner. The owner is responsible for proper cleaning and regular maintenance of this equipment.  
6) Damaged in transit: Equipment damaged in transit is the responsibility of the freight company and a claim should be made with the carrier.  
7) Abuse or neglect (including failure to periodically clean or remove lime accumulations): Manufacturer is not responsible for variation in  
equipment operation due to excessive lime or local water conditions. The equipment must be maintained according to the manufacturer’s  
recommendations.  
8) Replacement of items subject to normal use and wear: This shall include, but is not limited to, light bulbs, shear disks, “0” rings, gaskets,  
silicone tube, canister assemblies, whipper chambers and plates, mixing bowls, agitation assemblies and whipper propellers.  
9) Repairs and/or Replacements are subject to our decision that the workmanship or parts were faulty and the defects showed up under normal  
use. All labor shall be performed during regular working hours. Overtime charges are the responsibility of the owner. Charges incurred by delays,  
waiting time, or operating restrictions that hinder the service technician’s ability to perform service is the responsibility of the owner of the  
equipment. This includes institutional and correctional facilities. The Wilbur Curtis Company will allow up to 100 miles, round trip, per in-warranty  
service call.  
RETURN MERCHANDISE AUTHORIZATION: All claims under this warranty must be submitted to the Wilbur Curtis Company Technical Support  
Department prior to performing any repair work or return of this equipment to the factory. All returned equipment must be repackaged properly in  
the original carton. No units will be accepted if they are damaged in transit due to improper packaging. NO UNITS OR PARTS WILL BE AC-  
CEPTED WITHOUT A RETURN MERCHANDISE AUTHORIZATION (RMA). RMA NUMBER MUST BE MARKED ON THE CARTON OR  
SHIPPING LABEL. All in-warranty service calls must be performed by an authorized service agent. Call the Wilbur Curtis Technical Support  
Department to find an agent near you.  
Printed in U.S.A. 8/06 F-1994  
Wilbur Curtis Co., Inc.  
6913 West Acco Street, Montebello, CA 90640-5403 U.S.A.  
Tel: (323) 837-2300 Fax: (323) 837-2401  

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