Instructions premix Air heaters type XR10.. 60
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8.2 Start by using the service-button
Press the service-button (shortly) once , and the unit will commence the ignition-cycle; (30 sec
pre-purge, ignition, 15 sec flame stabilize, modulating operation) The burner will then start in
low fire. By pressing the service-button again, the burner will go to high fire.
Pressing the service-button for a third time will put the unit into normal operation. (depending
on the thermostat)
8.3 Start by bypassing thermostat
When the thermostat connection is jumpered (between terminals 4 and 5), the unit will only
function on high fire. The ignition sequence is always the same as 8.2.
8.4 Start by using the thermostat
Put the thermostat in the highest position.
With the TCW roomthermostat following functions are possible ;
Red LED lights continuously :
Flame on.
Red LED lights intermittently :
Flame in lock-out.
Green LED lights :
Summer ventilation on.
Grey button ; press 1 sec. :
Summer ventilation on / off.
Grey button ; press 6 sec. :
Flame fault reset
8.5 To simulate a lock out condition
Close the manual gas supply valve. The heater will go to lock-out after a restart attempt. The
lock out indication (in the heater ) must light up. The lock out indication on the TCW room
Thermostat (if installed) will now flash.
Check also the function of the reset button (with gasvalve open again), and observe if heater
starts smoothly.
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In principle, it is
not
necessary to adjust the gascontrol after putting the unit into operation.
In case it needs to be adjusted, (f.e. after fitting a new one), this must be done only by a
qualified person.
Only use calibrated instruments !
A poor adjustment can lead to
overheating and / or production of the poisonous carbon monoxide !.
There are two screws to adjust the
gascontrol, the Offset adjuster and the
Ratio adjuster.
Put the heater into operation at high fire
by pressing the service button twice
quickly.
If the heater does not ignite while
sparking, you can, if necessary, close the
air-openings of the coloured ring on the gas-air mixer with thumb and forefinger during ignition.
The mixture will become richer and will ignite more easily.
Open the pressure-nipple “P offset” and connect a calibrated pressure gauge to it.
If the heater is in operation, the read underpressure must comply with the value from the
technical specifications. You can change this underpressure by turning the Offset adjuster
screw located under the little cover. Turn to the left for more underpressure, turn to the right for
less underpressure. When the underpressure is set correctly, you replace the little cover and
close the pressure-nipple “P offset”.
Offset adj.
Ratio adj.
P out
P offset
P in
