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Clean and inspect the condensate pipes and the siphon every year. Always fill the siphon
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after cleaning with water to prevent flue gas escaping in the room.
9.2 Inspection of the heater
Before starting the inspection, switch off the electric power to the heater with the maintenance-
switch and close the manual gas valve.
Take out the burner, complete with flange and pre-mix fan, by unscrewing the 6 off M6
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socket screws and you have taken off the ignition and fan wires
Check the heat exchanger from the inside for dirt and/or damage.
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Check the burner on damage and clean the ignition electrode if necessary . CAUTION: do
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not twist the electrode out of shape!
Check the air supply and the flue discharge.
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Clean eventual the inside of the heater with a vacuum cleaner.
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In case the heat exchanger is dirty on the outside, clean it with a soft brush. Never use a
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steel wire brush!
Clean the fan-grid with a vacuum cleaner and a brush.
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Put the burner back in (renew the gasket)
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After this, check the heater on efficiency of combustion and adjust these if necessary
Check the heater operates correctly.
9.3 Ignition electrode
For the correct ignition of the burner it is important that the ignition
electrode is adjusted right.
The distance between the electrode and the burner should be
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5.0 ±0.5 mm.
The distance between the two electrodes should be 3.6 ±0.4
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mm.
Check the setting of the ignition electrode, the spark has to be
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formed between the electrodes and not between the electrode and the burner.
10 Examples electrical installation:
10.1 Thermostat cable
In all cases the communication between the heater and the thermostat is based on a two wire,
low-voltage connection. In the appliance the wire for the thermostat has to be connected to
connection 4 and 5 (see also electrical wiring diagram).
Cable specification: signal cable, 1x2x0,8 (shielded and twisted)
Maximum length 200m.
If the cable is chosen too thin, the signal will become too poor. If the cable is not shielded and
twisted the signal my become disturbed in an EMC unfriendly environment.
Keep the thermostat cable separated from mains cables. Connect the earth shield of the cable
only to the earth terminal in the heater.
If these guidelines are not followed it may result in malfunction of the installation or worse, it
could damage the thermostat or the electronics in the heater.
Never mount the thermostat near aerials of internal communication networks.
These emit radiation that could lead to disturbance of the thermostat. Always keep
some meters distance.
10.2 Installation with modulating room thermostat
• Connect the heater to Mains
• Connect the thermostat to the terminals according to the diagram.
(terminal 4 and 5)
Instructions condensing Air heaters type HR version HR-GB-4001-a
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