Glow-worm Ultracom sxi - Manual (Page 36)

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11 Electrical Connection
Diagram 11.4
13488 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 11.2. External controls should be
fitted in accordance with the rules in force.
11.3 Mains Voltage System Controls
WARNING: UNDER NO CIRCUMSTANCES MUST
ANY MAINS VOLTAGE BE APPLIED TO ANY OF THE
TERMINALS ON THE 24V CONNECTION PLUG.
Connect mains supply and system controls as diagram 11.3.
External controls should be fitted in accordance with the rules
in force.
11.4 Electrical Cartridge Securing
Fit electrical cartridge into the interface housing on completion
of the wiring, see diagram 11.4.
Secure with the two cartridge retaining screws provided in the
cartridge body.
11.5 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.
3. Test the polarity of the mains.
NOTE: If you require to test the appliance refer to section 14.
IMPORTANT: At the time of commissioning, complete all
relevant sections of the Benchmark Checklist located in the
centre pages of this document.
12.1 Preliminaries - All Systems
The commissioning should be carried out by a competent
person approved at the time by the Health and Safety
Executive and in accordance with the current issue of
BS6798.
DO NOT operate the boiler without water.
Make sure that the system has been thoroughly flushed
out with cold water and that all cleanser, if used, has been
removed.
Isolate the boiler from the mains electrical supply.
Test for gas tightness and purge air from the gas supply.
IMPORTANT: Before starting the boiler check that all flue
connections are secure and sealed correctly.
12 Commissioning
12.2 Filling the Heating Circuit
With the gas isolation valve closed and with no demand from
any external controls switch on the power supply to the boiler.
The boiler should be in “OFF” mode, this will be indicated
on the user interface display, refer to diagram 12.2. If not,
press the “Mode” button repeatedly until the “OFF” symbol is
displayed, then continue as follows:
1. Open the Central Heating Flow and Return isolating
valves marked ‘A’ using a screwdriver or a 4mm allen
key - slot in line with the axis of the valve (shown closed
in diagram).
2. Fill the heating system to a pressure of 1.0bar. The
system pressure will be displayed on the user interface.
3. Vent all air from the system - repeat as necessary
until the system is full and all the air has been vented.