Commissioning - gledhill GB10 Installation And Servicing Instructions

6.1. General
Commissioning should be carried out by a competent person in accordance with the current issue of
BS6798. Make sure that the system has been thoroughly flushed out with cold water. Refill the system with
water, making sure that all the air is properly vented from the system. Before operating the boiler check that
all external controls are calling for heat.
With a sealed system fill the system until the pressure gauge registers the recommended pressure. Clear
any air locks and check for leaks. Check the operation of the safety valve, preferably by allowing the water
pressure to rise until the valve lifts. This should be within ± 0.14 bar of the preset pressure. Where this is
not possible a manual check should be carried out. The system pressure should then be reduced to the
initial design pressure.
6.2. Initial Lighting
Isolate the boiler from the mains electrical supply. Test for gas soundness and purge any air from the gas
supply. The boiler lighting procedure operates automatically once the switch on the appliance is in the ON
position (indicated by flame symbol) and any external controls are calling. The dot D1 will begin to flash to
indicate that the controller is active.
display will indicate the boiler flow temperature. If the boiler fails to light it will attempt to ignite 5 times before
showing ignition lockout, initially this may be due to air in the gas supply line.
After the boiler has fired allow it to warm up the system and purge any remaining air from the system, the
appliance will continue to fire until the user controls are satisfied.
6.3. Testing – Gas
The gas rate can be checked using the gas meter and a stopwatch after the burner has been running for 10
minutes. Before a gas rate check is made make sure all other gas burning appliances are turned off.
As a guide the approximate gas rates are:
IMPORTANT
The gas valve and the Venturi are factory set and sealed. These should not need any adjustment and
MUST NOT be tampered with. However, check that a supply pressure of 20mbar is available at the
boiler when it is firing at full rate.
6.4. Testing – Heating System
Check that all controls are calling for heat, fully open all radiator valves and allow the heating system to heat
up. Balance the radiators as requires giving the required differential across the heating system and set the
bypass. Turn off all user radiator valves that can be turned off and check that the maximum differential
achievable across the flow and return is less than 20
Allow the system to achieve full temperature and then switch off and isolate the appliance. Drain the system
whilst still hot from the lowest part of the system ensuring all parts of the system is emptied. Fill and vent the
system as described previously.
VER: 02.3 _260505
Supplied By www.heating spares.co Tel. 0161 620 6677

6. COMMISSIONING

When the burner is lit, the dot D1 will be on constant and the digital
GB30
GB25
GB20
GB15
GB10
o
C.
3
3.3 m /h at maximum fan speed
3
2.7 m /h at maximum fan speed
3
2.2 m /h at maximum fan speed
3
1.6 m /h at maximum fan speed
3
1.1 m /h at maximum fan speed
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