Instructions condensing Air heaters type XR version XR-GB-4001-a
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9
Maintenance
The heater must be inspected and cleaned regularly (once a year) by a qualified installer who
understands this appliance.
This is all the more important as the circumstances are heavier, especially in case of dust,
humidity, high frequency of switching on/off etc.
Activities:
9.1 General inspection
•
Check the overall condition of the installation. Check the heater, the thermostat, the wires
and the gas line.
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
socket screws and you have taken off the ignition and fan wires
•
Check the heat exchanger from the inside for dirt and/or damage.
•
Check the burner on damage and clean the ignition electrode if necessary . CAUTION: do
not twist the electrode out of shape!
•
Check the air supply and the flue discharge.
•
Clean eventual the inside of the heater with a vacuum cleaner.
•
In case the heat exchanger is dirty on the outside, clean it with a soft brush. Never use a
steel wire brush!
•
Clean the fan-grid with a vacuum cleaner and a brush.
•
Put the burner back in (renew the gasket)
After this, check the heater on efficiency of combustion and adjust these if necessary
Check the heater operates correctly.
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)
