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Once the lid or side panel are removed, access to the Service Area 

has been gained. This access must be restricted to persons having 

knowledge and practical experience of the appliance, in particular as 

far as safety and hygiene are concerned.

De-scale

Note

: Whenever the body lid has been removed from the boiler  a new lid 

gasket will be required to ensure a steam-tight joint. Damage to the unit 

caused by a poor lid seal is not covered under the warranty of the unit.

Scale deposits should be removed from all internal surfaces, particularly 

the heating element and thermistor’s, by gently tapping or scraping. If 

the deposits are soft, use a nylon pad and flush out. Abrasive cleaning 

materials containing scouring powders and detergents must not be used, 

such materials can cause taste problems. Chemical de-scalants must only 

be used in accordance with the manufacturer’s instructions.

Basic operation

The water-fill and heat functions of the CB boiler are completely 

independent of each other. 

Heater function

The printed circuit board (PCB) controls the heating function of the boiler 

by monitoring the top and bottom thermistors, the safety cutout and 

the economy switch. The function of this switch is to bring the bottom 

thermistor in or out of circuit. In the ‘ECON’ position, the bottom thermistor 

is ignored resulting in a reduced volume of water being maintained 

at operating temperature. In the ‘MAX’ position, both thermistors are 

monitored and a larger volume of hot water is available for use at any one 

time. The PCB also controls the external light unit to indicate when the 

water is at the correct temperature: green for ready (i.e. top thermistor 

satisfied), red for wait (i.e. water below temperature). If both lights are 

displayed together, the low water safety cutout has tripped, or some 

section of its circuit has become open. This would occur either because 

the machine has been switched on without first allowing it to fill with 

water, (and the element has energised in air), the safety cutout is faulty 

(and should be replaced), or there is a poor contact at the PCB connector 

pins. Removing and re-fitting the connector usually remedies the latter 

Diaphragm (FVD)

Central pin pointing

towards valve body

Filter (FVF)

Cutout

Locating boss

(FVAFC)

Float (FVFL)

Pin

Float arm

& cap

fault.  The possibility also exists that the setting of the cutout has been 

turned down. These are factory set to 120°C, but turning it down below 

100°C would cause it to constantly trip. The red LED on the PCB will 

flash when first energised indicating program initialisation. There after 

the LED indicates ‘Neutral’ switched to element. Note: the element has a 

permanent ‘Live’ feed.

Should an element fail and need to be replaced, it is necessary to replace 

the four-piece lid gasket to ensure a reliable steam-seal.

 

In the event of a PCB failing and a replacement being required, full 

instructions will be supplied. It is important to note, however, that the 

integral Triac must be securely mounted against the copper heat-sink / 

mounting bracket to ensure reliable heat dissipation.

Water-fill function

A Torbeck float valve controls the water level in the cold water tank, which 

feeds the main boiling chamber (referred to as the ‘body’). This is generally 

a reliable component, but problems can arise if the incoming water supply 

contains debris. Occasionally, dirt can pass through the internal filter and 

become lodged on the diaphragm, causing the valve to weep. This can 

be remedied by dismantling the valve (as shown opposite) and gently 

cleaning the diaphragm with fresh water. When re-assembling the valve, 

the diaphragm must be re inserted with its central pin facing into the body 

of the valve and with the pin on the body passing through the hole in the 

diaphragm. Before tightening the nut, ensure that the cut-out in the float 

arm is positioned around the locating boss on the valve body. The nut 

should be hand-tightened only.  

Note: The valve can take up to 

15 seconds to fully close after 

the float arm is raised. This is 

a normal feature of the valve 

and is intended to reduce the 

effects of water / pipe hammer

For assistance with any aspect of 

the machine, please call Calomax 

directly on 0113 249 6681 or            

e-mail [email protected]

SERVICE INSTRUCTIONS

Summary of Contents for CB32

Page 1: ... DIAGRAM FOR First Choice Group Blakeney Way Kingswood Lakeside Cannock Staffs WS11 8LD TEL 01543 577778 FAX 01543504141 Email enquires firstchoice cs co uk Web www firstchoice cs co uk Water Boiler CB32 CB22 CB12 ...

Page 2: ...CING INSTRUCTIONS Calomax Limited Lupton Avenue Leeds LS9 7DD Tel 0113 249 6681 Fax 0113 235 0358 e mail service calomax co uk www calomax co uk Please read these instructions carefully before operating your boiler for the first time Issue 6 2 2 06 DCR 700 ...

Page 3: ...ructions For assistance in finding a suitable engineer in your area contact our service department on 0113 249 6681 or e mail service calomax co uk Before commencing installation check that the following parts have been supplied with the boiler 1 Alternative low pressure float valve restrictor CONSTRUCTION All metallic components of the machine are manufactured from high quality 304 grade stainless ...

Page 4: ...om 20 KPa to 1000 KPa 0 2 to 10 Bar via an isolating stop cock fitted near the boiler The boiler is supplied with High Pressure and Low Pressure restrictors It is the responsibility of the Installation Engineer to select the appropriate restrictor and fit it to the float valve in accordance with the instruction sheet provided Correct selection of restrictor can significantly reduce noise associated wi...

Page 5: ...ecurely using the supplied strain relief bar A means for all pole disconnection must be incorporated including appropriately rated fuse The installation of a residual current device RCD having a rated residual operating current not exceeding 30 mA is advisable An equipotential conductor connection terminal is provided on the rear of the unit The supply should be connected as follows Brown Live L B...

Page 6: ... are being used not recommended extra care must be taken to avoid injury through splashing or over filling caused by the high flow rate and the run on of water after the tap has been closed To begin filling pull the handle forward or push it backward hot water begins to flow To stop filling release the handle so it returns to the upright position NOTE Depending on the length of the nozzle fitted some ru...

Page 7: ...2 22 31 24 Includes 28 Fitted as standard 6 or 7 as alternatives Includes thermistor pocket all washers nuts Exploded parts view To be read in conjunction with the spare parts list on pages 16 17 Complete assembly Incorporating 11 12 13 14 Supplied with insect filter gaskets ...

Page 8: ...ould be regularly de scaled by a suitably qualified engineer Depending on the water in your area some de scaling may be required within the first twelve months This is not covered under the product s warranty as this is not a fault The use of a Dosaphos Scale Reducer see Accessories on page 13 is recommended for the alleviation of scale and corrosion Accessories Worktop mounting Stainless Steel drip...

Page 9: ...faulty and should be replaced or there is a poor contact at the PCB connector pins Removing and re fitting the connector usually remedies the latter Diaphragm FVD Central pin pointing towards valve body Filter FVF Cutout Locating boss FVAFC Float FVFL Pin Float arm cap fault The possibility also exists that the setting of the cutout has been turned down These are factory set to 120 C but turning it...

Page 10: ...PE KIT FLOAT VALVE ASSEMBLY FLOAT VALVE ARM AND CAP FLOAT VALVE FLOAT FLOAT VALVE DIAPHRAGM FLOAT VALVE FILTER OVERFLOW UNIT WATER TANK 1 2 3 4 8 7 6 5 9 10 11 12 16 15 14 13 X4 CBRSK CBNLK CB34WH CB32PCBT CBTW CBT120 CBE3K CBGS TTA BTA CBBLA CBBLG CB32IS CB32BK CB32WP CBWTNA CBE2K CBE1K ELEMENT 1 2 or 3kW WITH STAT POCKET PRINTED CIRCUIT BOARD WIRING HARNESS 2 LIGHT INDICATOR UNIT KIT ECONOMY SEL...

Page 11: ...it low pressure or high pressure restrictor Replace float Both wait and ready lights illuminated Boiler in lockout condition See heater function page14 Re seat the safety cut out plug to circuit board Check safety cut out set to 120 degrees Ensure water available at tap Power down machine for 20 seconds and switch on If symptoms persist replace safety cut out Wiring Schematic for Calomax CB32 22 12...

Page 12: ...EASE ENTER MODEL AND SERIAL NUMBER FOR FUTURE REFERENCE Note All measurements are approximate We shall repair or replace without charge Product or component parts thereof found to be faulty in material or workmanship that are returned to our works within 12 months from the Original Date of Despatch PLEASECONTACTOURSERVICEDEPARTMENTFORASSISTANCE Calomax Limited Lupton Avenue Leeds LS9 7DD Tel 0113 ...

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