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INSTALLATION INSTRUCTIONS AND MAINTENANCE
1. Important notes
– The controls must be installed by qualified personnel
only. The relevant national regulations have to be
observed.
– On commissioning the wiring has to be carefully check-
ed according the appropriate diagram, Incorrect wiring
can damage the unit and endanger the installation.
– The fuse rating has to ensure that the limits specified in
TECHNICAL DATA will not be exceeded. If these precau-
tions are not observed, the effect of a short circuit can
cause severe damage to the control and installation.
– For safety reasons a minimum of one control shutdown
per 24 hours has to be observed.
– Disconnect the mains before the control box is plugged
in or out.
– The control box is a safety device and must not be
opened!
2. Function control
For safety reasons the flame detection system should be
tested on commissioning the installation as well as after a
service or longer shut-down.
a) Start-up with closed gas valve
– After lock out safety time is over the unit has to go into
lock out mode!
b) Normal start-up, when burner is running, close gas valve
– After loss of flame, the control box has to go into
lockout mode
c) Normal start-up, during pre-purge or operation, interrupt
the air proving switch
– The control box has to perform a lockout immediatly
d) Bridged air proving switch before start
– the fan motor switches on for approx. 2 - 3 secs,
followed by a lockout. After 10 secs., this quick
lockout is resetted by the control box and a second
start attempt follows (fan motor switches on for approx.
2 - 3 secs.). A standard lockout appears if the air
proving switch (LW) contact is still in it's closed
position (e.g. welded contacts). Has the air proving
switch (LW) changed to it's open position in the
meantime (e.g. by a run down motor), a normal start
sequence follows.
3. Fault finding
The built-in information system facilitates the trouble shoot-
ing in the case of problems occurring during start-up or
during operation.
A list of possible lock out messages can be found in
APPLICATION FEATURES chapter 1.2.
Please note:
The control box is locked in lock out mode and
the reasen for the lock out is displayed until
the control box is reset, either by an internal or
external reset (see also subject "3. Lock out
and reset").
Removing the control box from its wiring base or by
interrupting the supply line may not reset a lock out. There-
fore, by applying power, the fan motor switches on for 2-3
secs. before the control box goes to lock out again and the
cause of the last lock out.
Error
Burner not working
Fan motor starts for a short
period of time, control
box goes to lock out
Control box locks out
pre-purge
Control box locks out
at the end of pre-purge
Burner starts,
flame not established,
lock out
Burner starts,
flame established,
after safety time,
lock out
4
Possible fault
- Thermostat circuit open
- Faulty electrical wiring
- mains voltage < 187 V (< 80 V)
- Terminal A continuously on
power (e.g. terminal A is used as
a support terminal)
- Control box has not been reset
- Air proving switch not in open
position
- Air proving switch has not during
closed within 60 secs.
- Air proving switch has re-opened
- Air proving switch open
- Flame signal
- No ignition or no fuel
- No or too low flame signal (flame
does not stick, bad insulation of
the ionisation probe, bad connec-
tion to frame ground)
- Insufficient light on IRD
- Sensitivity adjustment
too low on IRD
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