Glow-worm Flexicom hx - Manual (Page 26)

0020107230_04 - 12/14 - Glow-worm
INSTALLATION
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Commissioning should only be carried out by a competent
person approved at the time by the Health and Safety
Executive.
11.4 Initial Lighting
NOTE: Ensure that initial lighting of the appliance takes
place with the front casing door removed and the control
box lowered. Initially run the pump to ensure all air has
been vented from the system.
The combustion for this appliance has been checked,
adjusted and preset at the factory for operation on natural
gas (G20) as defi ned on the appliance data label.
Do not adjust the Gas/Air ratio valve.
As an option, a chargeable boiler performance and function
service can be provided by Glow-worm Service by calling
telephone No. 01773 828100.
It is a requirement to measure and record the CO value and CO/
CO2 ratio. Guidance on measuring the values can be found in the
fl ow chart located in the Appendix. The recorded values should be
within the limits outlined in the fl ow chart and documented in the
Benchmark log book at the very back of this manual.
DO NOT operate the boiler without water.
The lighting procedure of the boiler is fully automated.
Refer to diagram 11.2.
● With no demand from any external controls, switch on the
electrical supply to the boiler.
● Open the gas service isolation valve, see diagram 11.1.
● The appliance will enter a self checking routine then the
fan should start and the ignition will commence.
Diagram 11.2
14513
The boiler, if necessary, will automatically repeat the
ignition sequence a further 4 times.
● If the burner fails to ignite “F1” will be displayed, initially,
this may be due to air in the gas supply line.
● Once the system has been purged of air. Press and hold the
“ Mode “ button of the boiler user controls for 2 seconds, the
Central Heating symbol,
will fl ash. Use the “SELECTOR”
buttons to adjust CH temperature.
After 10 seconds of inactivity the display will reset to indicate
the water temperature.
● Turn ON your external controls and select the room
temperature required.
The boiler will operate automatically.
NOTE: The display will indicate the Heating system water
temperature or a fault code if in a fault condition.
11.5 Check the Gas Inlet Pressure & Gas
Rate
The supply from the governed meter must be of adequate size
to provide a steady inlet working pressure of 20mbar (8in wg) at
the boiler. On completion, test the gas installation for tightness
using the pressure drop method and suitable leak detection
fl uid, purge as necessary.
NOTE: Due to the modulating operation of the boiler and the
need to check the gas inlet pressure and measure the gas rate at
maximum rate, it will be necessary to force it to maximum.
Press the “reset” button on the controls fascia, release and
immediately press and hold in the “+” button. After approximately
5 seconds “Hi” will be displayed. Pressing the mode button when
“Hi” is selected will force the boiler to maximum rate, the display
will fl ash between “Hi” and the “default display” this will indicate
the boiler has been forced to maximum.