Glow-worm Ultrapower sxi Series Installation And Servicing page 39

11 Electrical Connection
24V SYSTEM
CONTROLS
To Control Box
BOILER MODULE
GROMMET
TANK MODULE
TANK THERMISTOR
CONNECTION
11.2 System Controls 24V
WARNING: UNDER NO CIRCUMSTANCES MUST ANY
MAINS VOLTAGE BE APPLIED TO ANY OF THE TERMINALS
ON THE 24V CONNECTION PLUG.
Connect the mains supply and system heating controls e.g.
room thermostat as diagram 11.4. External controls should
be fitted in accordance with the rules in force.
If fitting a proprietary programmer as part of the system
controls the internal central heating programmer will need to
be disabled as described in section 11.4. If fitting the Glow-
worm Climapro programmer the internal programmer will
automatically be disabled.
11.3 Mains Voltage System Controls
WARNING: UNDER NO CIRCUMSTANCES MUST ANY
Diagram 11.4
MAINS VOLTAGE BE APPLIED TO ANY OF THE TERMINALS
ON THE 24V CONNECTION PLUG.
Connect mains supply and system controls as diagram 11.5.
External controls should be fitted in accordance with the
rules in force.
If fitting a proprietary programmer as part of the system
controls the internal central heating programmer will need to
be disabled as described in section 11.4. If fitting the Glow-
worm Climapro programmer the internal programmer will
automatically be disabled.
11.4 Disabling the internal CH Programmer
If fitting an external proprietary CH Programmer, it is
necessary to disable the Internal Programmer.
a)
b)
c)
d)
e)
f)
Diagram 11.5
g)
h)
i)
The CH Programmer has now been disabled. The DHW
Programmer is still active. See the diagnostic menu
instructions in the Fault Finding section for further details.
11.5 Tank Thermistor
The tank thermistor should be connected between the boiler
and tank modules. The cable and connection plug from the
control box passes through a grommet on the base of the
boiler module to the connection on the LH side of the tank
module, see diagram 11.6.
11.6 Electrical Connections - Testing
Carry out preliminary electrical system checks as below:
1. Test insulation resistance to earth of mains cables.
2. Test the earth continuity and short circuit of cables.
Diagram 11.6
3. Test the polarity of the mains.
39
Press and hold the 'mode' button for 5 seconds.
The display will change to flashing '0'.
Use the '+' or '-' button to scroll to 96.
Press 'MODE' to confirm.
The display now shows a flashing 'd. 0' Use the
'+' or '-' key to scroll to 'd.92'.
Press 'MODE' to confirm.
The display now shows a flashing '3' above the
'd.92'.
Use the '+' or '-' button to change this value to
'1'.
Press 'MODE' to confirm, '1' stops flashing and is
saved.
Press and hold 'MODE' to exit.