ermaf GP 120 - Commissioning; Commissioning Prerequisites; Adjusting the heater; Burner Gas Pressure Adjustment

GB-6
D
GB
F
NL
I
E
Commissioning
▷ The heater may only be commissioned once it
has been ensured that the heater, gas pipes,
mains voltage supply and room thermostat have
been installed by authorized, trained personnel
according to the regulations.
 Switch on the power supply.
 Release the gas supply.
Part designations
ON/OFF
(RESET)
MODE
OFF
AUTO
+AUTO
3
4
5
2
1
 MODE/RESET selection button
 BCU On/Off switch
 Red lamp lights up if a fault is pending
4 Operating mode LED: Off
5 LEDs for selectable operating modes
▷ The BCU is operated using two buttons:
using the ON/OFFbutton
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
, the heater is
switched on and off. By pressing the MODE
selection button for >1s, it is possible to switch
between the different operating modes.
Operating
mode
Explanation
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
BCU waits for the signals for controlled
air flow or heating.
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
Heating (continuous operation)
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
Controlled air flow (continuous opera-
tion)
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
Controlled air flow (continuous opera-
tion) and heating when thermostat sig-
nal is applied
Switching on
 Switch on the burner control unit. Press ON/OFF
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
until an LED lights up.
▷ The BCU switches on in the last operating mode
selected.
▷ The heater starts once the set switch-on delay
timet
E
has elapsed, see page5 (Adjusting the
switch-on delay tE).
▷ The burner starts after the safety time of 5s has
elapsed and operates in the selected operating
mode.
▷ The operating mode can be changed using the
MODE selection button. The selected operating
mode is only activated once the device has been
in this position for at least 3s. It is thus possible
to “scroll” through the different operating modes.
Switching off
4 Switch off the heater. Press ON/OFF
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
. The LED
next to “
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
” lights up and the burner switches off
after 3s. Mains voltage is still supplied however.
▷
The fan cools the heater down until it reaches
switch-off temperature.
Faults
▷
Flashing LEDs signal the cause of a fault, see
page9 (Assistance in the event of malfunction).
▷ In the first 4s after switching on the power supply
or pressing the ON/OFFbutton
OFF 1
2
3
4
5
AUTO
+ AUT
MODE
(RESET)
ON/OFF
O
, an operating
mode is not yet active. Within these 4s, a new
operating mode can be selected. As soon as
the MODE selection button has been pressed
and a new operating mode has been selected,
the 4s are extended accordingly.
▷ If a fault has occurred, it is displayed immediately,
but 4s are also available here during which a
new operating mode can be selected.
Adjusting the heater
Burner gas pressure p
G
p
u
= Inlet pressure
p
G
= Gas pressure on the burner
▷ The gas pressure on the burner is adjusted using
p
G
on the combination control.
p
G

0
p
G
p
G
p
G
p
G
p
u
2,5 mm
0
p
G
▷ For this, the outlet pressurep
G
must be meas-
ured on the combination control.
 Disconnect the system from the electrical power
supply. The mains plug may only be pulled out
once the device has been switched off and post-
cooling is complete.
 Shut off the gas supply.
 Open the test nipple.
p
G

0
p
G
p
G
p
G
p
G
p
u
2,5 mm
0
p
G
4 Connect a pressure gauge with display range
10to 50mbar.
p
G

0
p
G
p
G
p
G
p
G
p
u
2,5 mm
0
p
G
5 Switch on the power supply.
6 Release the gas supply.