Specification Ignition Transformer; Functions; Flame Control (Lock Out); Thermostats (Shutdown / Lock Out) - REMEHA Gas 550 Technical Information

6.3.3 Specification control box
Control box
Main supply
Minimum ionisation current
Reaction time flame protection
Safety time
Maximum ambient temperature : 60 °C
Injector size pilot burner
Injector size main burner
Burner pressure full load
(high calorific gas)
Burner pressure part load
(high calorific gas)
Burner pressure pilot burner
(high calorific gas)
Warning: control box is phase neutral sensitive.

6.3.4 Specification Ignition transformer

Ignition transformer : Satronic ZT 870
Ignition voltage : 16 kV
Distance electrodes : 3,5 ± 1 mm.

6.4 Functions

General
The following functions (standard and optional) will,
when activated, either lock out or shut down the boiler.
For all options full fitting instructions are included in the
option pack.

6.4.1 Flame control (lock out)

The flame is monitored using ionisation flame detection.
In the event of a flame failure the boiler will lock out.
Manual intervention is required to reset the boiler (on
the control panel) once the cause of the problem has
been rectified.
Note: The Gas 550 Duo has two sets.

6.4.2 Thermostats (shutdown / lock out)

- Control thermostat On/Off: shutdown (35°C-95°C);
The boiler will automatically resume operation when
the flow temperature falls below the set point.
- Control thermostat High/Low: shutdown (35°C-95°C);
The boiler will automatically resume operation when
the flow temperature falls below the set point.
- High Limit thermostat: lock out at 110°C.
The boiler will lock out. Manual intervention is required
to reset the boiler (on the instrument panel) once the
cause of the problem has been rectified.
Note: The Gas 550 Duo has two sets.
Supplied By www.heating spares.co Tel. 0161 620 6677
: Satronic MMI 816
: 230 V – 50 Hz
: min 3 µA (DC)
: 1 sec.
: ≤ 10 sec.
: Ø 1.0 mm
: Ø 5.4 mm
: 8.4 mbar (100%)
: 2.2 mbar (50%)
: 13 mbar
12

6.4.3 Water level control (lock out)

The boiler is equipped with a water level sensor to
prevent boiler from operating without water. The boiler
will lock out. Manual intervention is required to reset the
boiler (on the instrument panel) once the cause of the
problem has been rectified.
Note: The Gas 550 Duo has two sets.

6.4.4 Valve leakage control - optional ( lock out)

The gas train can be combined with a valve leakage
control, which checks for gas leakage between the val-
ves at every start. The boiler will lock out. Manual inter-
vention is required to reset the boiler (on the valve
leakage control) once the cause of the problem has
been rectified.
Type: Dungs VPS 504.
Note: The Gas 550 Duo requires two sets.

6.4.5 Gas pressure switch LD - optional (shut down)

If the supply gas pressure drops below the set value
(12mbar; for natural gas, cat. I
down. When the supply gas pressure returns above this
set value the boiler will resume operation again.
Type: Dungs GW50 A5.
Note: The Gas 550 Duo requires two.

6.4.6 Gas pressure switch HD - optional (lock out)

If the gas arrival pressure rises above the set value
(10mbar; for natural gas, cat. I
out. Manual intervention is required to reset the boiler
(on the gas pressure switch) once the cause of the
problem has been rectified.
Type: Dungs UB 50 A2.
Note: The Gas 550 Duo requires two.
6.4.7 Down draught thermostat; (optional, shut
down)
If the themperature in the draft diverter rises above the
down draught thermostat set point, the boiler will shut
down. It automatically resets after 3 minutes, provided
that the temperature also falls.
Type: Honeywell L6068A; fixed setpoint is 70°C.
Note: The Gas 550 Duo requires two.
Remeha Gas
550/550 Duo
only), the boiler will shut
2H
only), the boiler will lock
2H