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2.

Preconditions for installation

The appliance can only be sold in the countries mentioned
in the type plate.

2.1

Regulations

Any local by-laws and regulations pertaining to installation
and use of gas-heated appliances must be observed. Please
refer to the laws that should be attended in South Africa.

2.2

Location

The appliance should be sited in a well ventilated room where
it will not be exposed to temperatures below freezing.
To prevent corrosion, the combustion air must not contain
any corrosive substances. Substances classed as corrosion-
promoting include halogenated hydrocarbons such as are
found in solvents, paints, adhesives, aerosol propellants and
various household cleaners. Appropriate measures should
be taken where necessary.
With the exception of the flue pipe, the surface temperature
of the appliance is below 85 °C. No special safety measures
are therefore necessary.
Site appliance as shown in Fig. 5.
Always site appliance in a location not exposed to
temperatures below freezing. If this is not possible, the
appliance must be switched off and drained and the batteries
removed whenever there is a risk of freezing.

Danger:

 the appliances are designed to prevent flame reflow.

In case you suspect anything unusual in the appliance
operation, please shut down gas and water cocks, and call
an approved technician to check the local conditions.
To prevent flame reflow in 

outdoor installations

 please make

sure that a wind/rain protection is fitted.
To prevent flame reflow in 

indoor installations

 please make

sure that a wind/rain protection is fitted at the end of the
secondary flue.

2.3

Fixing the appliance

Remove the temperature control and the output 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 completely clog up the appliance.
Mark hot water and cold water pipes so as to prevent
confusion.
Connect pipe to automatic water valve using the connecting
kit supplied.
To prevent problems caused by sudden pressure fluctuations
in the water supply, it is advisable to fit a non-return valve to
the water outlet.

2.5

Gas connection

Take care to ensure dirt is not allowed to enter gas inlet.
Make sure that the type of gas specified on the appliance
type plate is the same as that supplied by the gas authorities.

2.7

Commissioning

Turn on the gas and water cocks and check all connections
for leaks.
The two 1.5 V type R batteries supplied must be correctly
fitted (Fig. 6).
Check flue gas safety device good functioning, proceed as
explained in section 3.5.

Fig. 5

wind/rain

protection

Select pipe diameter to suit output of instantaneous water
heater being installed.
Fit gas service cock as close to appliance as possible.

Caution:

 This is a low pressure gas appliance. A SA certified

2.8 kPa low pressure regulator must be fitted.

2.6

Flue

It is absolutely essential that all instantaneous water heaters
are connected to a suitably dimensioned flue pipe by means
of a gas-tight connection.
The flue pipe should be made of galvanised iron, aluminium,
stainless steel or fibre concrete. Fit as shown in Fig. 5.
A flexible or rigid pipe should be used, fit it inside the flue
socket. The external diameter of the pipe should be slightly
smaller than the dimension specified in the appliances
dimensions table.

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...

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