Ravenheat HE 25 C COMPACT, Instructions For Use Installation And Servicing

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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
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Anti-clockwise to increase CO
2
.
Clockwise to decrease CO
2
.
After any new regulation wait to stabilise
for about one minute.
Replace the front cover.
- 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 will
display and fan will stop, and the display will
show the lockout code (E01 depicts flame
show the lockout code (E01 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).
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
22
. Check the reading against the . Check the reading against the
corresponding value in table 9. corresponding value in table 9.
It is essential that this test is repeated with It is essential that this test is repeated with
the casing on as this will check the integrity the casing on as this will check the integrity
of the flue.
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 9, adjust the
maximum level of CO
2
with the Throttle
using a 2.5 mm hex on the gas valve
(fig.35).
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