Glow-worm Betacom C - Manual (Page 42)

42
1 2 3 4 5 6 7 8
ON DIP
1 2 3 4 5 6 7 8
ON DIP
DIP SWITCH
OFF POSITION
DIP SWITCH
ON POSITION
1 2 3 4 5 6 7 8
ON
P7
P5
P2
P4
DIP
11.7 Boiler Adjustments
The boiler incorporates 4 potentiometers and a bank of dip
switches to allow adjustment to its pre-set parameters. These
are situated on the rear of the control panel.
The potentiometers can easily be accessed by removing
the cover on the rear of control panel. However, to reach the
dip switches, the control panel must be opened, see diagram
10.4.
Setting the maximum CH heating flow temperature: The boiler
is dispatched with a maximum flow temperature factory set to
85°C. Where a lower maximum temperature is required such
as in the case of under-floor heating, the factory setting can
be altered between a maximum of 50°C and a minimum of
30ºC, by fitting dip switch ‘6’ into “ON” position, see diagram
11.11.
Setting the boiler’s integral pump: The boiler’s integral pump
is factory set to operate in both C.H. and D.H.W. mode.
Where an external pump is incorporated into the system
design the integral pump may be disconnected in C.H. mode
by fitting dip switch ‘5’ into the “ON” position, see diagram
11.11.
Setting the 45 seconds delay: The boiler is factory set to
exclude the delay of 45 seconds before re-ignition between
the closing of a hot water tap and CH start-up. This delay can
be set to 45 seconds by setting dip switch ‘3’ into the “OFF”
position’, see diagram 11.10 and 11.11.
255 seconds delay setting: The boiler is capable of up to 255
seconds ignition delay (anti cycling time) before re-ignition
following burner shut down on the primary hydraulic water
reaching its set temperature. This delay can be increased up
to a maximum of 255 seconds by turning potentiometer ‘P5’
clockwise, see diagram 11.12.
Pump working mode setting: The boiler has a factory set to
operate the pump for pre-purge and post-purge times (45
secs). This delay can be excluded by fitting dipswitch ‘2’ into
“ON” position, see diagram 11.10 and 11.11. However, this may
then cause the boiler over-heat thermostat to trip out.
Setting the Heating output: The Betacom 24c and 30c boilers
are factory set to give maximum CH heating output. The
maximum heat output for heating is pre-set on ‘P2’
potentiometer, see diagram 11.12.The adjustment for max CH
has no effect on max. DHW capacity of the boiler.Ignition
capacity can be increased /decreased by turning ‘P4’
potentiometer clockwise / counter-clockwise. Boiler type is
pre-set on Dip Switch ‘8’ “OFF” position denotes 24 kW,
and `ON` position denotes 28 kW.
Dipswitch 1 and 7 must always be in the “OFF” position.
Dipswitch 4 must always be in the “OFF” position.
Potentiometer 7: No adjustment required.
11 Commissioning
14553
14565
14555
14554
Diagram 11.9
Diagram 11.11
Diagram 11.10
Diagram 11.12
1 2 3 4 5 6 7 8
ON
P7
P5
P2
P4
DIP
POTENTIOMETER
COVER
POTENTIOMETERS
4 OFF
8 DIP SWITCHES IN
THE OFF POSITION