Wilbur Curtis WB-10, WB-10-12 Service Manual

WATER BOILER WB-10 -12

Revised 7/04

6913 West Acco Street,  Montebello, California 90640
Tel: [phone]  Technical Support Tel: [phone] Fax: [phone]

WATER BOILER - WB-10 -12

INSTALLATION INSTRUCTIONS

1. Unpack equipment carefully, inspect for any freight damage. Be sure to promptly
put a claim into the freight company if any damage is found.

2. Connect faucet securely to the faucet adapter.
Electrical and plumbing hook-ups should be made by authorized installers only.
INSTALLATION MUST COMPLY WITH ALL NATIONAL AND LOCAL ELECTRICAL AND
PLUMBING CODES.

3. This water boiler can operate on 120, 208 or 220 volt power supply. To ground equip­ment, connect the ground wire to the green screw on inside bottom of wrap.

4. This boiler comes wired for 208 or 220 volt, single phase, 3 wire plus ground, see wiring
diagram.

5. To connect the water boiler for 120 volt operation:
A. The facility will have two wires, one WHITE (neutral) and the other BLACK. Plus

GREEN for ground.

B. Splice the BLACK wire from power source, to both the heavy RED (#10 AWG) and

thin BLACK (#18 AWG) wires from the WB-10.

C. Take the WHITE wire from the facility power source and splice it to the BLUE wire

(#10 AWG) and WHITE wire (#18 AWG) from the machine (see wiring diagram).

6. Water Hook-Up: Use a 1/4" copper line with a female flare fitting. Water inlet fitting is
located on the back of the WB-10.

CAUTION Before turning thermostat dial to ON position, fill equipment with water up

to the probe tip. This will prevent heating elements from burning out.

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TROUBLE SHOOTING

PROBLEM: WATER WILL NOT REFILL

POSSIBLE CAUSE

1. Water line closed
or clogged filter

Check the water system at your facility to make sure the line is
open. Replace the water filter.

SOLUTION

2. Valve coil burned
out

3. Grounded probe

4. Defective water
level control
board

PROBLEM: WATER OVERFLOWING.

POSSIBLE CAUSE

1. Defective water
inlet valve

Turn machine 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 disconnected. If valve fails this test, replace valve.

When the water level gets below the probe tip, water should
automatically refill the unit. If not, pull wire off the probe termi­nal. Water should now start flowing into the water boiler.

Disconnect wire from probe terminal. With a voltmeter, check
voltage at the water inlet coil terminals. This should read 110-120
volts. If no voltage is present, check liquid level control (L.L.C.)
board. Make sure the L.L.C. board is supplied by 120V across
terminals T2 & T3. The L.L.C. board is grounded to the body of
the machine by contacting the board to the mounting bracket.
Make sure board is grounded here. Check for loose connections
at terminals. Replace board.

Turn power off and observe water level. If water continues to flow
into the heating tank, clean or replace leaky valve.

SOLUTION

2. Probe limed up

3. Non-grounded or
loose terminal
connections at
liquid level con­trol board

PROBLEM: WATER DOES NOT REACH PROPER TEMPERATURE

POSSIBLE CAUSE

1. Thermostat
turned OFF (or
set too low)

Disconnect wire from probe terminal. Touch the body of the heat­ing tank with the terminal at 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 through the
back of the board and the mounting bracket. Check for loose
connections at the terminals. Check for voltage across the inlet
valve terminals. If there is 110 to 120 volts present at the inlet
valve terminals when water level is touching the probe tip, replace
the L.L.C. board.

SOLUTION

Check thermostat to make sure the shaft is knob is rotated clock­wise to the desired temperature.

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