Ravenheat White Boiler WH 80, Instructions For Use Installation And Servicing

41

-  To select the minimum heating temperature 

To select the minimum heating temperature 
press the radiator button.

press the radiator button.

-  Press arrow up and arrow down buttons to 

-  Press arrow up and arrow down buttons to 

adjust.

adjust.

-  The digital display shows the current set 

-  The digital display shows the current set 

temperature in central heating.

temperature in central heating.

-  After a few seconds the digital display shows 

-  After a few seconds the digital display shows 

the central heating temperature in demand 

the central heating temperature in demand 
(C.H. icon flashing, item 3 fig. 2).

(C.H. icon flashing, item 3 fig. 2).

-  The fan starts and after a few seconds or 

-  The fan starts and after a few seconds or 

so the digital led display will show that the 

so the digital led display will show that the 
ignition has commenced.

ignition has commenced.

-  NOTES: Put the digital clock in demand  

-  NOTES: Put the digital clock in demand  
   position.

   position.

-  The ignition control will automatically make 

-  The ignition control will automatically make 
   three attempts to start, if it doesn’t start  this 

   three attempts to start, if it doesn’t start  this 

may be due to air in the gas supply line. 

may be due to air in the gas supply line. 
If the burner fails to light, the  digital led 

If the burner fails to light, the  digital led 
display and fan will stop, and the display 

display and fan will stop, and the display 
will show the lockout code (E1 depicts flame 

will show the lockout code (E1 depicts flame 
failure).

failure).

-  If necessary push the boiler Reset button 

-  If necessary push the boiler Reset button 
   (item 2 fig.1) and the boiler will restart    

   (item 2 fig.1) and the boiler will restart    
   automatically.

   automatically.
-  After the boiler has lit, allow to warm at 

-  After the boiler has lit, allow to warm at 
   minimum temperature setting to purge any 

   minimum temperature setting to purge any 
   air from the system.

   air from the system.
-  Once the system has been purged of air, 

-  Once the system has been purged of air, 

set the heating temperature to the desired 

set the heating temperature to the desired 
setting.

setting.

     6.8 

CHECK THE GAS PRESSURE

     6.8 

CHECK THE GAS PRESSURE

               Check the gas mains pressure at  the gas    

               Check the gas mains pressure at  the gas    
               valve inlet pressure test point (fig.35) with the 

               valve inlet pressure test point (fig.35) with the 
               boiler operating at full rate. 

               boiler operating at full rate. 
               Check with the Local Gas supplier if the 

               Check with the Local Gas supplier if the 
               pressure differs significantly from 20 mbar

               pressure differs significantly from 20 mbar
               G20 (natural gas), 37 mbar G31 (propane) 

               G20 (natural gas), 37 mbar G31 (propane) 
               and 29 mbar G30 (butane). 

               and 29 mbar G30 (butane). 
               With leak detection fluid test for gas tightness 

               With leak detection fluid test for gas tightness 

of all gas components and joints.

of all gas components and joints.

IMPORTANT: 

IMPORTANT: 

               The Gas Valve Throttle adjuster is required 

               The Gas Valve Throttle adjuster is required 
               to be sealed with tamper proof paint after 

               to be sealed with tamper proof paint after 
               adjustment (fig. 35). 

               adjustment (fig. 35). 

     6.9 

     6.9 

COMBUSTION CHECK

COMBUSTION CHECK

Check all gas carrying components along with, 

Check all gas carrying components along with, 

the combustion of the appliance which should 

the combustion of the appliance which should 
be checked as follows.

be checked as follows.

              Remove the front panel of the appliance.

              Remove the front panel of the appliance.
              Ensure the boiler and external controls are 

              Ensure the boiler and external controls are 

calling for heat. Turn on the electrical supply.

calling for heat. Turn on the electrical supply.

open the hot water tap at maximum flow rate. 

open the hot water tap at maximum flow rate. 

Wait at least five minutes or until the unit has 

Wait at least five minutes or until the unit has 
reached its operating temperature.

reached its operating temperature.

              Unscrew the test sample screw on the boiler 

              Unscrew the test sample screw on the boiler 

elbow bend (item 60 fig. 10). Measure the level 

elbow bend (item 60 fig. 10). Measure the level 
of CO

of CO

2

2

.  Check the reading against the 

.  Check the reading against the 

              corresponding value in table 10 and with 

              corresponding value in table 10 and with 

reference to page 63.

reference to page 63.

IMPORTANT: 

Do not insert the analyser 

probe into the sample point immediately 
or leave in long periods. This will prevent 
saturation of the analyser.

               During the calibration function the 

combustion ratio may increase for a 
short time while the boiler performance is 
optimised.

               The person carrying out a combustion

carrying out a combustion

               measurement should have been assessed 

               measurement should have been assessed 
               

               as competent in the use of a flue gas 
               analyser.
                              
              The flue gas analyser used should be one 

meeting the requirements of BS7927 or BS-
EN50379-3 and be calibrated in accordance 
with the analyser manufacturer’s 
requirements.

Fig. 37

   ELECTRODES POSITION 

CO2

%

NAT

GAS

9.0

(+0.5

/

 ‐

0.5)

LPG

10.5

(+0.5

/

 ‐

0.5)

              It is essential that this test is repeated 

It is essential that this test is repeated 

with the casing on as this will check the 

with the casing on as this will check the 
integrity of the flue.

integrity of the flue.

              If adjustment proves necessary then 

proceed as follows.

               IMPORTANT: 

Any adjustment  to the gas 

valve should only be carried out by a   

               qualified person. 

Referring to the table 10, adjust the 

               maximum level of CO

2 

 with the Throttle 

               using a 4 mm hex on the gas  valve (fig.35).
               Anti-clockwise to decrease CO

2

. 

               Clockwise to increase CO

2 

               After any new regulation wait to stabilise   
               for about one minute. Replace the front 
               cover.

TABLE 10