Fig. 1.
The WR 325 is a balanced flue instantaneous Gas Fired Multipoint
Water Heater with a modulating gas output.
This appliance is not suitable for connection to a conventional
chimney.
The outside terminal (or terminal guard if fitted) must be kept
clear of obstructions at all times.
It is the law that all gas appliances are installed by competent
persons such as a Corgi registered installer.
Failure to install appliances correctly can lead to prosecution.
It is in your own interest and that of safety to ensure that the law
is complied with.
General Description
Temperature control turned out fully anti-clockwise:
4.0 to 12.3 litres/minute at 25˚C temperature rise
Temperature control turned in fully clockwise:
2.0 to 6.5 litres/minute at 50˚C temperature rise
The WR 325 water heater will operate for approximately 60 min-
utes on one therm of gas under continuous full load conditions.
Performance
STARTING UP (See Figs. 2 and 3)
On initial light-up of a new appliance, a smell may be noticed but
this is not harmful and will fade away after the appliance has
operated for a time.
Move the gas control slide to the centre position.
Observe the pilot burner through the observation window and
press in the centre button of the control slide and hold depressed
while pushing in the Piezo igniter button two or three times. The
pilot should light. Wait 10 seconds and then release the centre
button of the gas control slide. The pilot should remain alight. If
the pilot is not established, repeat the operations until a flame is
established.
Note that on initial light-up or after prolonged shut-down, the
establishment of the pilot may take several attempts due to the
presence of air in the gas supply pipe.
Move the slide control fully to the right and fully open any hot
water tap. The main burner should light.
Turn off the tap and the main flame will be extinguished.
Operation
Appliance type WR 325
Rated input 25.5 kW
Rated output 7.0 kW to 21.4 kW
Maximum gas rate Natural gas – 2.7 m3/hr
LPG – 2.0 m3/hr
Fig. 2. Gas control slide – ignition position
Fig. 3. Gas control slide – operating position
Technical Data
Piezo igniter
Gas control slide in
this position
Piezo igniter
Gas control slide in
this position
