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water fails to discharge from the vent tube after power 
has been switched on to the boiler for 20 minutes.

•  Check there is power to the boiler. The ‘Plug’ LED  should be 

green.

• Check there are no kinks in the vent hose.

water is continually dripping/running into the vent 
assembly.

Water continuously discharging from the vent indicates that the 
water pressure is too high; above the 5 bar (73 psi) stipulated  
maximum. In normal operation the pressure relief valve will allow 
water to drip for approximately 20 minutes after the boiler is  
switched on. Thereafter it will drip periodically; after water is 
drawn off and as the boiler comes back up to temperature. 

Check the water pressure at a low demand period (mid morning 
or mid afternoon). If it exceeds 5 bar (73 psi) it will be necessary 
to install a pressure reducing valve. The optimum pressure is 3 bar 

(44psi). A suitable valve can be purchased at www.frankefilterflow.

co.uk or from a plumber’s merchant. 

While waiting for the pressure relief valve to be fitted turn off the 

boiler.

the vent assembly is overflowing.

This will be caused by a blockage in the vent assembly. Check that 
the vent pipe is correctly installed. (see Page 6). Make sure that 
the hole in the waste pipe is properly cut and clear of debris.  

the filtered cold and boiling water flow from the tap is 
slow.

Generally this indicates that the filter cartridge is clogged with 
contaminants and needs replacing.  You can check by operating 
the filtered water with no cartridge in the filter housing. 

the flow of filtered boiling water has slowed to an 
unacceptable level inside the 6 months change period. 

 The period between cartridge replacements is not guaranteed; it is 

an estimate based on filtering mains water of average quality. 

Please bear in mind that water quality varies from locality to 
locality and situation to situation. In areas with higher than 
average turbidity (particle contamination) more frequent cartridge 
changes may be necessary.

Frequently asked questions

and troubleshooting guide

the boiling water flow is agitated and noisy

Please bear in mind that your Omni Tap system is dispensing 
boiling water, rather than very hot water, and as a consequence 
there will be the normal steam, agitation and noise associated 
with boiling water. Initially this may be alarming, but read through 
the technique suggested below and practice it a few times. Soon 

you will gain confidence and using the tap will be second nature.  

Bear in mind that your Omni tap dispenses water hotter than you 
are used to with a kettle.

to operate the boiling water function. 

Discharge a small amount of water until steam appears. Turn 
off the boiling water. Position the vessel over the outlet of the 
tap spout and continue to dispense boiling water by maintaining 
pressure on the handle. Gradually lower the vessel while keeping 
the spout just above the surface of the water.

Summary of Contents for omni DUO

Page 1: ...Franke omni DUO Boiling water system Installation User Guide...

Page 2: ...RECT INSTALLATION The Franke Omni System comprises 3 separately packaged assemblies 1 Franke Omni Duo tap Part Number 119 0513 245 2 Franke boiler Model QHT 1 Part Number 119 0380 581 3 Franke water f...

Page 3: ...al power supply is required you must seek the services of a qualified electrician The boiler must only be connected to the 230V mains electricity supply through either an earthed independent wall sock...

Page 4: ...4 nuts x2 11 NutRunna hand tightening device for G1 2 nuts x4 12 Omni QHT 1 Boiler 13 Push fit elbow 14 Flat Silicone Washers for boiler water inlet outlet x2 15 Vent Assembly 16 Saddle Clamp 17 Vent...

Page 5: ...he cabinet slide the gasket 8 and the clamp plate 5 over the hoses and the stud at the base of the tap Screw the clamp nut 6 on to the stud using the box spanner 7 5 Check the alignment of the tap the...

Page 6: ...sump leading to eventual failure 1 Position the filter unit 20 vertically with the hoses at the top in its previously determined location 2 Mark the positions for the two filter unit support screws 22...

Page 7: ...bly and enough room to operate the pipe cutter 19 1 Separate the two halves of the saddle clamp by unscrewing and removing the four nuts and bolts Discard the two black rubber inserts for 41mm waste p...

Page 8: ...caps from the three connections on the top of the boiler 2 Place the boiler 12 in position upright on a flat surface inside the cabinet with the connections to the top 3 Take the G1 4 female nut 20 B...

Page 9: ...scharging from the vent pipe Important note If water does not start to discharge from the vent pipe into the cup after 20 minutes switch off the power operate the boiling water function on the tap to...

Page 10: ...ng the Omni tap The body of the tap is clearly marked to show the 2 functions Boiling Filtered water Remove the red safety clip 3 Depress the boiling water lever to release the safety lock and rotate...

Page 11: ...rew the sump by hand until it separates from the head of the filter 5 If the old cartridge does not automatically fall free press down on the top mount of the cartridge to release it Remove the old ca...

Page 12: ...dicates that the filter cartridge is clogged with contaminants and needs replacing You can check by operating the filtered water with no cartridge in the filter housing The flow of filtered boiling wa...

Page 13: ...ication it should be replaced Foam or a film is forming on the surface of hot drinks This is caused by a combination of the agitation of the boiling water creating millions of tiny air bubbles the ph...

Page 14: ...e have your receipt to hand so that we can record your date of purchase The company reserves the right to alter change or modify product specifications without prior notice Guarantee This Franke produ...

Page 15: ...electrical and electronic equipment By ensuring this product is disposed of correctly you will help prevent potential negative consequences for the environment and human health which could otherwise b...

Page 16: ...M22 5WB Phone 44 0 161 436 6280 Email info uk franke com www franke co uk After Sales Service FilterFlow Old Winery Business Park Chapel Street Cawston Norfolk NR10 4FE Phone 44 0 1603 875 468 Email...

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