Filling The Heating System (Thermocompact); Initial System Flush ("Cold"); Gas Supply Adjustments (Commissioning Part Ii); Gas Inlet Working Pressure - Vaillant 824/2 E Instructions For Installation Manual

6 Commissioning Part I

6.5 Filling the heating system (thermoCOMPACT)

The boiler and the heating system should be filled using
a filling method as described on page 13.
• Ensure that the boiler CH service valves are open.
• Partially open the filling valve and allow water to
enter the system. Starting with the lowest radiator,
open the radiator air release until water (clear of
bubbles) is emitted.
• Repeat this at all radiators until the complete system
is full, all air locks have been cleared and the boiler
pressure gauge reads 1.5 bar. Release any air from the
pump by slackening the centre screw.
• The boiler is equipped with an automatic air release
valve. To allow this to vent the boiler, the cap on the
top must be slackened by 1 - 2 turns. (This cap must
be left slackened during boiler operation to ensure
any residual air or system gases are released).
• Check the heating system and boiler connections are
sound.

6.6 Initial system flush ("cold")

The whole of the heating system must be flushed out at
least twice: once cold, and once hot as instructed later.
Open all radiator and heating valves and the boiler CH
service valves and drain the heating system and boiler
completely from the lowest points of the system via 1/2"
BSP drain taps (opened full bore to remove any
installation debris prior to lighting the boiler).
Refill the heating system.
Check the operation of the pressure relief valve by
rotating the knob on the valve.
Now check the water pressure in the unit again (and add
more water if necessary).
26
Supplied By www.heating spares.co Tel. 0161 620 6677
Gas supply adjustments (Com. Part II) 7
7 Gas supply adjustments

7.1 Gas inlet working pressure

To check the gas inlet working pressure:
• Lower the front panel of the boiler.
• Lower the control panel.
• Slacken the sealing screw (1) located at measuring
point "P.IN".
• Attach U-gauge to the inlet test point on the gas valve
(2).
• Ensure that the gas service valve is open.
• Turn off the boiler at the main ON/OFF control.
• Press and hold the "+" button, while pressing the
button turn the main ON/OFF control to the "1" ON
position.
• Continue holding "+" button until display alternates
between "P1" and "P2". Release "+" button.
• Press "+" button until "P1" (full gas rate) is shown in
display.
• Press "i" button to operate boiler at full gas rate.
• Check that the U-gauge is reading in the range
between 18 and 20 mbar. If the pressure is not within
this range this should be investigated before
continuing with the commissioning procedure. Lower
pressures than this range are indicative of an
incorrectly sized or partially blocked gas supply.
• Switch off the boiler at the main ON/OFF control.
• Remove U-gauge, tighten test point sealing screw (1).
• Test for soundness.
• Record appliance working gas inlet pressure (mbar) in
the Benchmark Installation, Commissioning and
Service Log Book.
2
Fig. 7.1: Gas inlet working pressure
Instructions for Installation and Servicing turboMAX plus and thermoCOMPACT R1
1
1