Before re3commissioning the unitg all scale and
moisture must be removed from the level sensor
insulating gaskets to avoid false signalling
through the scale to the boiler body4 Failure to
remove this scale and dry the probes could cause
the sensor to indicate to the Printed Circuit Board
hPCBv that water is covering the element whether
or not water is present4 In this situation the PCB
could energise the element g causing failure4 If
in doubt g protect the element by hand filling the
boiler with water to cover the element before
switching on the electrical supply4
ISSUE 3
PAGE 5
MXN Replacing the jlement or Thermistor
The element or thermistor can be replaced by
removing the back-nuts and washers and withdrawing
from inside the boiling chamber.
IMPORTANT 9
A
new body lid gasket may be required4
MXS Replacing the Main fiircuit board LPfiK1 and
Triac PfiKX
ThemainPCBandthetriacPCBshouldbereplaced
as a matched pair to be sure of correcting circuit
board faults4
WX
Disconnect the wiring connections to the main
PCB
BX
Remove the PCB by pulling it forward off the
supports
NX
Disconnect the wiring to the triac PCB and remove
by releasing the fixing screw and pulling it forward off
the supports.
SX
Apply a thin layer of heat transfer compound
(supplied) to the mounting platform of the replacement
triac PCB and fit to the mounting supports. Ensure it
is positively located
and secure it with the single
fixing screw4
OX
Reconnect the triac wiring , see wiring diagram at
the rear of the manual
MX
Position the main PCB on the four supports and
wire in accordance with wiring diagram
MXO Replacing the Inlet Solenoid Valve
IMPORTANT9 In areas where scale can be a
problemg check that the fault is not due to a
blocked filter
( this is removable at the inlet to
the solenoid)
before replacing the unit4 Scale
build up in the filter can cause intermittent
problems4
WX
Remove the silicone hose that joins the sole-
noid to the water inlet.
Warningg the pipe will
retain a volume of water that will be released
when the connection is broken4
F4
Pull the solenoid from the mounting brack-
et
IMPORTANT9 the correct operation of
the boiler relies on a regulated flow of
water from the solenoid valve and there3
fore a genuine replacement part supplied
by Calomax must be fitted4
-4
Fit the replacement part onto the exist-
ing mounting bracket (if a mounting bracket
was supplied with the replacement valve this
should be removed ) and re-connect the live
and neutral connections
MXM Replacing the zispense ValveF Key
Switch F Push KuttonF Fascia PfiK
To replace any of the above parts, the
following instructions should be followed:-
1. Remove the outer casing lid
2. Loosen the two screws in the cover plate
located above the fascia and slide the plate
out.
3. Remove the four screws from the back
panel and remove , being careful not to
damage the thermal cut-out in the process
4. Remove each of the two screws holding
the copper heat sink, solenoid bracket and
main PCB bracket in position and allow them
to hang loose.
5. Remove the earth wire adjacent to the
main PCB from the right hand side of the
outer casing.
6. Unplug the wiring harness from the fascia
PCB and move the harness away from the
top of the outer casing.
7. Remove 2 screws from either side of the
base of the boiler.
8. The outer casing can now be removed by
leaning it forward, clear of the dispense valve,
and lifting it up / forward from the base.
Note 9 when re3assembling the boiler ensure the
wiring harness is plugged back into the fascia
PCB and the harness does not become trapped
between the body and outer casing4
zispense Valve
1. Disconnect the wires from the coil
2. Remove the two setscrews
3. Pull the valve forward leaving the rubber
insert behind.
