21
should be set to a lower water
temperature. If the pilot is extinguished
repeatedly at higher temperatures than
normal, this indicates that the safety
thermostat is operating.
2.10.2 Flue down draught safety
device
If the flue tube safety device has swit
-
ched off the appliance, the appliance can
be put back into operation through the
normal procedure. If the flue tube safety
device repeatedly puts the appliance out
of operation then this points to pro
-
blems with the flue. The only remedy is
to determine the cause of the problem
(for instance a blocked chimney) and to
solve the problem.
2.10.3 Hot water temperature
too low
1. Check the setting of the temperature
control knob;
2. Check whether the pilot is alight. If
necessary ignite (see “Putting into
operation”);
3. Check whether there are any leaks or
open taps;
4. Is the gas supply adequate? Check
and correct if necessary;
5. Perhaps the hot water consumption is
higher than was originally calculated;
6. Check whether the cold water inlet
has been correctly connected;
7. Check the thermostat sensor for scale
build up.
2.10.4 Hot water temperature
too high
Check whether the control thermostat is
set too high.
2.10.5 Possible water leakage
1. Check whether the drain tap is fully
closed;
2. Check whether all water connections
are water tight;
3. Check whether the possible water
leakage could be caused by conden
-
sation.
2.11 Gas smell
Warning
Immediately shut the main gas tap.
Do not light any fire or switch on
any lights, do not use any electrical
switches or alarm bells. Open windows.
Thoroughly inspect all gas connections
and, if the gas smell persists, alert the
local gas company and/or your installer.
2.12 Condensation
If the appliance is filled with cold
water or if the hot water consumption is
very high, condensation of flue gasses
will occur on the cold surfaces of the
combustion chamber and the flue tube.
The water drops will fall on the burner
and cause a sizzling noise. This is a
normal phenomenon that will disappear
as soon as the appliance reaches its
normal operating temperature.
imPorTanT WarninG
The applicance should neVer be ta-
ken into operation with a closed cold
water supply!
Provision should always be made for
expansion.
3. For THe user
3.1 Commissioning
Warning
Installing and commissioning (for the first
time) of this water heater should only
be carried out by a qualified competent
heating engineer.
3.1.1
Filling the water heater:
1. Close the drain valve;
2. Open the cold water valve to the water
heater and open all taps where hot
water can be drained for de-aeration.
The water heater is filled as soon as
cold water flows from all taps;
3. Close all hot water drain taps.
