Filling The Condensate Trap With Water; Testing And Measuring; Checking For Gas Leaks - Worcester GB162-50 Installation And Servicing Instructions

Commissioning
▶ Open the heating flow and return isolating valves on the pump group
(open position: parallel to the pipe).
Fig. 75 Opening the isolating valves (here: open position)
▶ Read the pressure from the pressure gauge on the pump group or on
the control panel of the BC10.
The pressure in the heating system, which is measured directly at the
boiler, must be at least equal to the required pre-pressure of the
expansion vessel plus 0.5 bar. This minimum pressure must not be less
than 1.0 bar (if the heating system is cold). The maximum pressure in
the heating system, measured directly at the boiler, must not exceed
3.5 bar.
Fig. 76 Reading the pressure gauge
▶ 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
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If the boiler has been in use for approximately 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

▶ Fill the condensate trap with water.
Fig. 78 Filling the condensate trap with water
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.
DANGER: Danger of fatal accident from explosive
fumes.
Pipes and fittings may leak after commissioning and
maintenance activities have been carried out.
▶ Carry out a correct leakage test.
▶ Only use approved leak detection spray to locate
leaks.
CAUTION: Damage to the installation due to short
circuits
▶ Cover any hazardous locations prior to locating the
leaks.
▶ Do not spray the leak detection product on cable
runs, plugs or electrical wiring. Do not let it drip onto
them either.
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