Instructions condensing Air heaters type HR
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8.2 Start by using the service-button
Press the service-button once for 10 seconds, and the unit will commence the ignition-cycle; (30
sec pre-purge, ignition, 15 sec flame stabilise, modulating operation) The burner will then start
on minimum load Display print
L/b . By pressing the service-button again, the burner will go
to maximum load. Display print
H/b
Pressing the service-button for a third time will put the unit into normal operation. (depending if
there is heat demand from the room thermostat).
8.3 Start by using the thermostat
Put the thermostat in the highest position. The start sequence is always the same as 8.2.
8.4 To simulate a lock out condition
Close the manual gas supply valve. The heater will go to lock-out after a restart attempt. The
display on the electronic circuit board shows [
A 1
]. The red LED will light as well. Check also
the function of the reset button (with gas valve open again), and observe if the heater starts
smoothly.
Display on the print board
0
stand-by
Stand-by
1
Pre-purge
System checks and 30 sec pre purge of the burner fan
2
Ignition
The ignition electrode sparks 5 sec. and the gas valve opens,
within 5 sec flame detection should occur.
b
Burn
After 15 sec stabilisation time, the heater will modulate to the
desired power. The heater will remain burning minimum 4
minutes.
P
Post purge
The heater will cool the heat exchanger for 3 minutes, and the
premix fan will post purge for 1 minute.
F
Summer
ventilation
The system fan is running on the summer ventilation mode
F
Blinking
Delta-T-regulation The system fan is running on low position on Delta-T-
regulation
L
/
1
/
2
/
…
Blinking
Service Low
The heater is running on the service mode. When the heater
burns, the heater will run on minimum power.
H
/
1
/
2
/
…
Blinking
Service High
The heater is running on the service mode. When the heater
burns, the heater will run on maximum power.