Curtis C500AP User manual

Wilbur Curtis Co., Inc.
6913 West Acco Street, Montebello, CA 90640-5403 U.S.A.
Tel: [phone] Fax: [phone]
C500AP & C500APT
AIRPOT COFFEE BREWER
ServiceManual
Carton Contents
Brewer, C500AP
Brew Cone, S/S
Fitting, Flare Elbow
Paper Filters
ServiceManual
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Qty Item
C
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®
Unpacking . . . . . . . . . .
Shipping List . . . . . . . . .
Rough-in Drawing . . . .
Start up . . . . . . . . . . . . .
Coffee Brewing . . . . .
Care & Maintenance
Troubleshooting . . . . . .
Wiring Diagram . . . . . .
Illustrated Parts List . . .
Warranty . . . . . . . . .
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5
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Back
Cover
Table of Contents
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
wherenoted.
-

[ 1 ]
Allproductsmanufactured bytheWilbur CurtisCompanyare thoroughlyinspectedat thefactoryand
arewarranted tobe free ofall defectsand faulty workmanship.The C500AP unit is packagedfor
maximumprotection forshipping. Make sure the shipping carton is not damagedor punctured.Un-
packthecartoncarefully,inspectingthe contentsforanydamage that mayhave occurredintransit.
Reportany damage immediatelyto thefreight company.
C500AP Airpot Coffee Brewer
UNPACKING
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16½"1"
25¾"D500AP
29 " D500APT
4"
16½"
14 " - D500AP
18"D500APT
20½"D500AP
23¾"D500APT
9" 2"
2½"
1"
78
1¼"
ROUGH-IN DRAWING - C500AP
BREW SETUP 2.2LITERS
ELECTRICAL 120Volts, 60 Hz
POWERREQUIREMENTS 1675 Watts, 14 Amps
CORD & PLUG 6 Ft./NEMA 5-15P
WATERHOOK-UP ¼"COMPRESSIONFITTINGFORWATERCONNECTION
18

C500AP Airpot Coffee Brewer
START-UP
Pour ground coffee into the filter and brew
cone.
Slide the brew cone onto the guide rails as far
in as it will go.
Place an empty, open airpot on the deck be-
neaththebrewcone.PushtheBREWSWITCH
to start. Hot coffee will start to flow from the
brew cone.
COFFEE BREWING
2
1
3
!CAUTIONHOTLIQUID.BREWINTOANEMPTYAIRPOTONLY.
DO NOT REMOVE BREW CONE UNTIL IT HAS COMPLETELY
DRAINED.
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.
[ 2 ]

C500AP Airpot Coffee Brewer
TROUBLE SHOOTING:
[ 3 ]
CARE AND MAINTENANCE OF C500AP
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.
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.
Daily Cleaning
POSSIBLE CAUSE SOLUTION
Make sure the brewer is receiving enough water pressure. Open the
water line and verify water flow.
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.
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).
PROBLEM: WATER DOES NOT FLOW INTO HEATING TANK.
1. Water line turned off
or water filter needs
changing
2. Water inlet valve coil
burned out
3. Grounded probe
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.

C500 AP Air Pot Coffee Brewer
TROUBLE SHOOTING CONTINUED:
[ 4 ]
PROBLEM: WATER NOT FLOWING FROM SPRAYHEAD.
SOLUTION
POSSIBLE CAUSE Check water level in tank. If water is not flowing into the tank, review
steps 1 thru 4, on previous page.
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.
11. Water level is too low
in heating tank
12. Defective brew switch
PROBLEM: WATER IN TANK DOES NOT GET HOT OR WATER TEMPERATURE TOO LOW
POSSIBLE CAUSE SOLUTION
8. Thermostat turned OFF
9. Defective thermostat Replace thermostat.
Check thermostat to make sure it is in the ON position.
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 HEATING TANK OVERFLOWING.
POSSIBLE CAUSE SOLUTION
Turn power off and observe water level. If water continues to flow in,
valve is leaking; clean or replace valve.
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.
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.
5. Defective water inlet
valve
6. Probe limed up
7. Non-grounded or loose
terminal connections at
liquidlevel control
board
POSSIBLE CAUSE SOLUTION
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
4. Defective or burned out
water level control
board

C500 AP Air Pot Coffee Brewer
POSSIBLE CAUSE
13. Defective brew timer
(WC-604)
14. Defective dump valve
or coil
SOLUTION
TROUBLE SHOOTING CONTINUED:
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.
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
[ 5 ]
COMMON STUD
CHASIS GROUND

WIRING DIAGRAM
[ 6 ]

C500 AP Airpot Coffee Brewer
ILLUSTRATED PARTS, MAIN VIEW
[ 7 ]

ILLUSTRATED PARTS, DETAIL BUBBLES
D
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18
C500 AP Airpot Coffee Brewer
☯ 8]
B
59
59
60

INDEX
NUMBER PART
NUMBER
1
2
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
27
29
30
31
32
33
34
35
36
37
41
42
43
44
45
46
48
49
50
51
WIRE BREW BASKET FOR WC-3323
BREW CONE COMPLETE, STAINLESS STEEL, 7 1/8"
LABEL,CAUTION
UNIVERSAL BREW CONE
HOT WATER FAUCET
FAUCET SEAT CUP, SILICONE
ON/OFF SWITCH
BREW SWITCH
SWITCHPANEL
BREW READY LIGHT
LIQUID LEVEL CONTROL BOARD, 120V.
SHOCK GUARD, FISH PAPER
#8 EXTERNAL LOCK WASHER
SCREW, 8-32x¼ PHILLIPS TRUSS HD SS
FITTING,SPRAYHEAD
TUBING,SILICONE,5/16"I.D
DUMPVALVE
LOCK NUT, 5/8"
SCREEN, DRIP TRAY
SPRAYHEAD, RED
COVER, CENTER WRAP
BUMPER LEG, 8-32 STUD
TOGGLE SWITCH
VALVE,INLET 1GPM120V10W
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,TANKLID
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
WC-3317
WC-3323
WC-3963
WC-3621
WC-1809
WC-1806
WC- 114R
WC- 122
WC-6317
WC- 202
WC- 608
WC-4380
WC-4329
WC-4525
WC-2977
WC-5310
WC- 817
WC-4213
WC-6221
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
DESCRIPTION
C500 AP Air Pot Coffee Brewer
PARTS LIST
[ 9 ]