Glow-worm Ultracom sxi - Manual (Page 37)

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12 Commissioning
Diagram 12.1
13476
Diagram 12.2
MODE
PROG
Ext Ext t
SYMBOLS DISPLAYED ON THE LCD AND DESCRIPTIONS
Max burner display
Min burner display
Temperature
Appliance OFF
Central Heating Function
LCD
DISPLAY
RESET
BUTTON
NOT
USED
CH TEMPERATURE
ADJUSTMENT
TOGGLE BUTTON
MODE and PROG
Glow-worm control (Optional) Ext
System pressure - not applicable
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CENTRAL HEATING ISOLATION VALVES
GAS SERVICE ISOLATION VALVE
ALL SHOWN CLOSED
DRAIN POINTS
UNDERSIDE VIEW OF BOILER
PRESSURE
TEST POINT
12.3 Gas Supply
The gas valve is factory set for natural gas (G20) and should
need no adjustment. Turn on the gas supply at the isolation
valve, see diagram 12.1. Check the supply pressure at the
pressure test point is 20mbar.
12.4 Initial Lighting
NOTE: The combustion for this appliance has been checked,
adjusted and preset at the factory for operation on natural gas
(G20) as defined on the appliance data label.
Do not adjust the Gas/Air ratio valve.
No measurement of the combustion is necessary, having
checked :
● the appliance has been installed in accordance with the
instructions.
● the integrity of the flue system and flue seals.
● the integrity of the appliance combustion circuit and
relevant seals.
● that all internal/external controls are calling for heat.
● the gas service isolation valve, diagram 12.1, is open.
As an option, a chargeable boiler only commissioning service
can be provided by Glow-worm Service by calling telephone
No. 01773 828100.
LPG Conversion: See section 12.9.
NOTE: If you have fitted a Glow-worm Options Board Kit,
please refer to the instructions supplied with the kit for
completion of commissioning.
Do not operate the boiler without water.
Refer to diagram 12.2
1. With no demand from any external controls, switch on the
electrical supply to the boiler.
Open the gas service isolation valve, see diagram 12.1.
2. Select your required function by pressing “ Mode “, scroll
through your options and select one of the following:-
Central heating.
Boiler functions ALL switched off. “OFF”
3. 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.
12.5 Check the Gas Inlet Pressure and
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 fluid, 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 flash between “Hi” and the
“default display” this will indicate the boiler has been forced to
maximum.
Operational Gas Inlet Pressure
With ALL other gas appliances operating, check the
operational supply pressure at the gas service isolation valve
test point, see diagram 12.1.
The nominal supply pressure for Natural Gas (G20) is 20mbar.
The nominal supply pressure for LPG (G31) is 37mbar.
Turn the taps and appliances off, then disconnect the pressure
gauge.