Valor 520AN Installation & Operation Manual - page 10
10
9. CHECK APPLIANCE OPERATION
Depress the control knob. Turn counter clockwise until resistance
is felt just before the piezo-electric ignition is activated. Keep the
knob depressed for a few seconds to purge air from the gas lines.
When it is judged that the air has been purged keep the knob
depressed and turn to the ignition position. A spark should be
produced which should ignite the pilot and cross lighting burner.
When ignition has been achieved, keep the control knob depressed
for approximately five seconds to allow the thermocouple probe to
warm up then release it. It the burner does not remain alight,
ensure that the air has been purged.
Check that the burners are correctly alight at the four settings on
the control valve as shown in the following table:-
Control knob
position
Burner appearance
Pilot & cross lighting burner only
Pilot & cross lighting burner on.
Front burner on low
Pilot & cross lighting burner on.
Front burner on low.
Rear burner on high
Pilot & cross lighting burner on.
Front burner on high.
Rear burner on high
Turn off after checking. To turn off, Push the control partially
in, turn clockwise and release the knob. If any resistance is
experienced at the ignition position, release the knob before
turning to the off position.
Note: If the fire is turned off while hot, wait three minutes before
relighting.
10. CHECK SYSTEM PRESSURES
For input adjustment, the gas supply pressure to the appliance
inlet must be between the figures in the table:-
Test Tapping
Point
Pressures (in w.c.)
Natural Gas
Propane
Max
Min
Max
Min
Supply -
upstream of
heater
regulator
10.5
5.0
14.0
11.0
Manifold-
Downstream
of heater
regulator at
high setting
4.2
3.8
9.7
9.3
For altitude level above 2000Ft on
Natural Gas
only:
Max
Min
Supply -
upstream of
heater
regulator
10.5
5.0
Manifold -
Downstream
of heater
regulator at
high setting
3.5
3.1
The burner manifold pressure is controlled by a built-in non
adjustable regulator. The manifold pressure should be checked at
the pressure test point which is located immediately downstream
of the regulator (i.e. located above the regulator). The pressure
check should be carried out with the fire alight and the control
knob at the full on position. The pressure setting should be
within the limits shown in the table.
If the pressure reading at this test point is incorrect but the supply
system pressure is correct when measured at the test point
upstream of the regulator, then the regulator is faulty and should
be replaced. After checking the pressure, turn off the fire, remove
the pressure gauge and replace the pressure test sealing screw. Test
the sealing screw for gas soundness.
11. CHECK FOR CORRECT VENTING
A CHECK FOR CORRECT VENTING OF COMBUSTION
PRODUCTS MUST BE MADE BEFORE THE INSTALLED
HEATER IS LEFT WITH THE CUSTOMER. THE TEST
SHOULD BE MADE IN THE FOLLOWING MANNER
Light the heater and set the control to the full on position.
After the appliance has been alight for five minutes place a lighted
smoke match or taper at the right side of the case level with the
opening of the smoke channel - see figure 14.
The installation is satisfactory if the majority of the smoke is
drawn into
the draft
diverter.
If the vent is
blocked or
has strong
reverse flow,
the thermally
actuated
switch
mounted in
the draft
diverter
opening will
automatically
shut off the
gas supply
within about
five minutes.
If most of the
smoke is not drawn in, leave for about ten minutes and then try
again.
If the majority of the smoke is still not drawn into the draft
diverter, turn the heater off and check cause of lack of draft, if
necessary get expert advice.
Fig.14 Venting check