Glow-worm Ultracom2 cxi - Manual (Page 27)

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INSTALLATION
12 Commissioning
i At the time of commissioning, complete all relevant
sections of the Benchmark Checklist located on the
inside back pages of this document.
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.
12.1 Switching on
• 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.
• With the gas service isolation valve closed, with no demand
from any external controls and the power supply to the boiler
switched off.
• Test for gas soundness and purge air from the gas supply.
• Press the on/off button to activate the appliance.
• Make sure that the domestic hot water and heating functions
on your appliance are not activated.
i Before turning on the cold mains supply to the boiler
turn off the cold water inlet to the boiler, lock the
filling loop in the closed position and close its filling
taps. The DHW and CH circuits can then be filled,
flushed and tested independantly.
12.2 filling the CH system (Central heating)
• Make sure that the installation's cold-water inlet isolating
valve is open.
• Open the isolating valves located on the connections: they
must be positioned in the direction of the flow.
1
2
3
Key
1 Air vent
2 Pump
3 Screw for the pump shaft
• Open the plug on the air vent located on the pump and the
automatic air vents on the installation.
If the Central Heating (C.H.) pressure falls below 0.4 bar, the
display will flash the current pressure and the boiler will not
operate. To increase the pressure, the CH circuit requires
"Topping up".
• Push the disconnector up then turn the green locking collar
to lock the disconnector in the filling position.
• Fully open the Lhd filling tap then gradually open the Rhd tap.
• When the operating pressure is achevied, close both taps,
unlock the disconnector and pull down to disengage.
i When turning the 230Vac supply on to the boiler
should the water pressure be less than 0.5 bar an
automatic air vent function will be activated for a
period of 5 minutes. During this time the pressure
should be increased and air vented from the system.
Note that the burner will not fire in either CH or DHW
mode and the display will blink displaying the current
water pressure.
• Vent air from each radiator until the water flows normally,
then close the vents.
• Leave the pump's air vent open.
i The following two operations will unblock the pump's
motor after a prolonged storage period and will
purge the air from the pumps circuit.
• Remove the screw from the pump shaft and introduce a flat
screwdriver. A trickle of water, under no pressure, should
normally come out of the pump.
• Rotate the pump shaft through several turns, then replace
the screw.