Filling The Condensate Trap With Water; Testing And Measuring; Checking For Gas Leaks - Worcester GB162-65 Installation And Servicing Instruction

B Purge the heating system via the air vents on the
radiators. Start at the lowest floor of the premises
and then work your way up from floor to floor.
Fig. 77 Purging the heating system
If the boiler has been in use for approx. one week and
the pressure reading on the display is less than 1.0 bar,
the system has to be topped up.
The pressure loss in a heating system is caused by air
bubbles escaping via fittings and (automatic) air vent
units. The oxygen contained in the fresh heating water
will also escape from the heating water after some time
and cause the pressure in the heating system to drop.
This explains why it is normal that the heating system
must be topped up a couple of times after
commissioning it. Eventually the system will have to be
topped up on average once a year.
Should it be necessary to top up the heating system
more frequently, water is probably escaping due to a
leakage in the system or a defective expansion vessel.
In this case the cause of the water loss must be repaired
as soon as possible.
10.1.2 FILLING THE CONDENSATE TRAP WITH
WATER
B Fill the condensate trap with water.
Fig. 78

Filling the condensate trap with water

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10.2 TESTING AND MEASURING

10.2.1 CHECKING FOR GAS LEAKS

Prior to the initial start-up check that the gas supply
pipework is gas-tight; this must be confirmed in the
commissioning log book.
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B Slowly open the gas valve by pushing on the gas valve
and turning it ¼ rotation in an anticlockwise
direction. The gas valve is open when it is in the
vertical position.
Fig. 79
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DANGER: Danger of fatal accident from
explosive fumes.
Pipes and fittings may leak after
commissioning and maintenance activities
have been carried out.
B Carry out a correct leakage test.
B Only use approved leak detection spray
to locate leaks.
CAUTION: Damage to the installation due to
short circuits
B Cover any hazardous locations prior to
locating the leaks.
B Do not spray the leak detection product
on cable runs, plugs or electrical wiring.
Do not let it drip onto them either.
Open the gas valve
COMMISSIONING
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