background image

7

6 720 607 527

3.7

Troubleshooting

Installation, servicing and repairs may only be carried out by an approved engineer.
The following table illustrates only a few solutions to straightforward problems.

The operations marked with “*” may only be carried out by an approved technician

Fault

Possible Cause

Solution

Appliance does not ignite.

Batteries flat, incorrectly fitted or switch set to
Off

Check position and refit/replace.

Pilot flame lights slowly/with difficulty

Batteries flat.

Replace.

Red LED flashes

Water not hot enough

Check position of water temperature control and
adjust to obtain desired hot water temperature

Water not hot enough, no flame

Gas supply dynamic pressure too low

Check gas cylinder governor and replace if
incompatible or damaged
Check whether gas cylinder (butane) is freezing
when appliance is in operation and re-site in
warmer location if necessary

Flame goes out while appliance is in
operation

Temperature limiter has tripped

Wait 10 minutes then restart appliance. If
problem recurs, call an approved technician.

Flue gas safety device has tripped

Ventilate room. Wait 10 minutes then restart
appliance. If problem recurs, call an approved
technician.

Reduced water flow rate

Inadequate inlet flow rate

Check and adjust.

Dirt in water service cock or mixer unit

Check and clean.

Automatic water valve clogged

Clean filter.*

Heat exchanger clogged (scale)

Clean and descale as necessary.*

Summary of Contents for W11B

Page 1: ...d installer Do not use or store easily combustible materials in the vicinity of the appliance Gas Instantaneous Water Heater Installation and Operating Instructions Installation and servicing of the appliance may only be carried out by an approved technician The appliance should be regularly serviced in order to ensure that it remains in perfect and safe working order If there is a risk of freezin...

Page 2: ...es Semi permanent pilot flame functions only during the time between opening of the water valve and activation of the main burner Heat exchanger has no tin lead lining Automatic water valve made of glass fibre reinforced polyamide 100 recyclable Automatic control of water flow maintains constant flow rate even with fluctuating supply pressure Green LED indicates burner condition 1 2 Explanation of...

Page 3: ...arge level 24 Servo valve 25 Output control 26 Gas valve 27 Gas valve for pilot burner 28 Pilot burner injector 29 Igniter electrode 30 Pilot burner 31 Temperature limiter 32 Flue gas safety device 33 LED indicator for burner status 1 Outer case 2 Hole for fixing to wall 3 Observation window 4 Temperature control 5 LED indicator for battery charge level 6 On Off switch 7 Output control 8 Gas conne...

Page 4: ... 31420 40300 52082 Output modulation range Btu h 31420 65570 40300 80595 52082 104165 Rated max heat input Qn Btu h 74450 92210 117825 Rated min heat input Qmin Btu h 36200 46105 58912 Supply pressure Natural gas mbar kPa 20 2 0 20 2 0 20 2 0 LPG butane propane mbar kPa 28 2 8 28 2 8 28 2 8 Consumption Natural gas G20 m3 h 2 2 2 77 3 5 LPG butane propane G30 G31 kg h 1 75 2 2 2 79 Number of inject...

Page 5: ...ut control Remove the outer case by sliding it forwards and then lifting upwards Fix the appliance using the sleeves and hooks supplied so that it is vertical Never allow the appliance to rest against water or gas pipes 2 4 Water connection It is advisable to drain the appliance before installing it as any dirt or grit inside it could reduce the water flow rate and in extreme cases could completel...

Page 6: ...G liquefied petroleum gas i e butane propane are set to the operating pressure stated on the identification plate 28 mbar Natural gas appliances are set to a Wobbe Index of 15 kWh m3 and a supply pressure of 20 mbar Sealed components must not be tampered with 3 4 Maintenance The appliance should only be serviced by an approved engineer A complete overhaul should be carried out after two years The ...

Page 7: ...t water temperature Water not hot enough no flame Gas supply dynamic pressure too low Check gas cylinder governor and replace if incompatible or damaged Check whether gas cylinder butane is freezing when appliance is in operation and re site in warmer location if necessary Flame goes out while appliance is in operation Temperature limiter has tripped Wait 10 minutes then restart appliance If probl...

Page 8: ...ain burner on On I Off 0 Turning control anti clockwise increases water flow rate and reduces water temperature Turning control clockwise reduces water flow rate and increases water temperature Temperature adjustment Starting up Low water temperature Lower output High water temperature Higher output Safety precautions for use of batteries Do not dispose of batteries with normal household waste tak...

Reviews: